<SEC-DOCUMENT>0000842517-22-000214.txt : 20221206
<SEC-HEADER>0000842517-22-000214.hdr.sgml : 20221206
<ACCEPTANCE-DATETIME>20221206112914
ACCESSION NUMBER:		0000842517-22-000214
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		13
CONFORMED PERIOD OF REPORT:	20221206
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20221206
DATE AS OF CHANGE:		20221206

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ISABELLA BANK Corp
		CENTRAL INDEX KEY:			0000842517
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				382830092
		STATE OF INCORPORATION:			MI
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-18415
		FILM NUMBER:		221447029

	BUSINESS ADDRESS:	
		STREET 1:		401 NORTH MAIN STREET
		CITY:			MT PLEASANT
		STATE:			MI
		ZIP:			48858
		BUSINESS PHONE:		9897729471

	MAIL ADDRESS:	
		STREET 1:		401 NORTH MAIN STREET
		CITY:			MT PLEASANT
		STATE:			MI
		ZIP:			48858

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ISABELLA BANK CORP
		DATE OF NAME CHANGE:	20080602

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	IBT BANCORP INC /MI/
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>isba-20221206.htm
<DESCRIPTION>8-K
<TEXT>
<XBRL>
<?xml version="1.0" ?><!--XBRL Document Created with Wdesk from Workiva--><!--Copyright 2022 Workiva--><!--r:bd8fd121-275e-4961-9ed7-edbf3722fa46,g:253e889c-def5-4986-bc67-dc11a7ee5a93,d:ae2791216cea454f857cee378e9d0786--><html xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.w3.org/1999/xhtml" xmlns:dei="http://xbrl.sec.gov/dei/2021" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2020-02-12" xml:lang="en-US"><head><meta http-equiv="Content-Type" content="text/html"/>


<title>isba-20221206</title></head><body><div style="display:none"><ix:header><ix:hidden><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:EntityCentralIndexKey" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl80L2ZyYWc6ZDMxMmJmYTBiMGFmNDhlM2I1NWU1YjNhZTBmN2JlNjkvdGFibGU6N2I2NTQzMjI5NDk3NGM2Mjk4ZDAxYTZkMjIwNjliMWEvdGFibGVyYW5nZTo3YjY1NDMyMjk0OTc0YzYyOThkMDFhNmQyMjA2OWIxYV8yLTEtMS0xLTc5MDMz_5fb72051-6dae-449f-ba1a-590daab04075">0000842517</ix:nonNumeric><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:AmendmentFlag" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl80L2ZyYWc6ZDMxMmJmYTBiMGFmNDhlM2I1NWU1YjNhZTBmN2JlNjkvdGFibGU6N2I2NTQzMjI5NDk3NGM2Mjk4ZDAxYTZkMjIwNjliMWEvdGFibGVyYW5nZTo3YjY1NDMyMjk0OTc0YzYyOThkMDFhNmQyMjA2OWIxYV8zLTEtMS0xLTc5MDMz_caebd119-5ee2-4394-b1fe-86ebac8e8aec">false</ix:nonNumeric></ix:hidden><ix:references xml:lang="en-US"><link:schemaRef xlink:type="simple" xlink:href="isba-20221206.xsd"></link:schemaRef></ix:references><ix:resources><xbrli:context id="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0000842517</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2022-12-06</xbrli:startDate><xbrli:endDate>2022-12-06</xbrli:endDate></xbrli:period></xbrli:context></ix:resources></ix:header></div><div id="iae2791216cea454f857cee378e9d0786_1"></div><div style="min-height:42.75pt;width:100%"><div><span><br/></span></div></div><div style="-sec-extract:summary;margin-top:3pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:18pt;font-weight:700;line-height:120%">UNITED STATES</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:18pt;font-weight:700;line-height:120%">SECURITIES AND EXCHANGE COMMISSION</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:120%">Washington, D.C. 20549</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:120%">&#160;</span></div><div style="margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:27.729%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:3pt"><td colspan="3" style="border-bottom:1pt solid #000000;padding:0 1pt"></td></tr></table></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#160;</span></div><div style="margin-bottom:9pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:18pt;font-weight:700;line-height:120%">FORM <ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:DocumentType" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGV4dHJlZ2lvbjo3ZWM2YTFkOTg2YzA0ZGIyYTY5ZDQxYTRhNGI1MjI3Nl8yMzQw_f9a49b47-4899-43e0-b63b-ece68ab78bcb">8-K</ix:nonNumeric></span></div><div style="text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:27.729%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:3pt"><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td></tr></table></div><div style="margin-top:4pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:120%">CURRENT REPORT</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:120%">Pursuant to Section&#160;13 or 15(d) of the Securities Exchange Act of 1934</span></div><div style="margin-top:9pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:120%">Date of Report (Date of earliest event reported): <ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:DocumentPeriodEndDate" format="ixt:date-monthname-day-year-en" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGV4dHJlZ2lvbjo3ZWM2YTFkOTg2YzA0ZGIyYTY5ZDQxYTRhNGI1MjI3Nl8yMzA_0b2e2355-ad8a-4846-a50a-9bc608232389">December&#160;6, 2022</ix:nonNumeric></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:120%">&#160;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#160;</span></div><div style="margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:27.729%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:3pt"><td colspan="3" style="border-bottom:1pt solid #000000;padding:0 1pt"></td></tr></table></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:24pt;font-weight:700;line-height:120%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:EntityRegistrantName" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGV4dHJlZ2lvbjo3ZWM2YTFkOTg2YzA0ZGIyYTY5ZDQxYTRhNGI1MjI3Nl8yMzQx_512505cb-08fb-4be7-9b3c-3eeeca47ff74">ISABELLA BANK CORP</ix:nonNumeric>ORATION</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(Exact name of registrant as specified in its charter)</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:120%">&#160;</span></div><div style="margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:27.729%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:3pt"><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td></tr></table></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:120%">&#160;</span></div><div style="margin-bottom:9pt;margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:36.974%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:1.955%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:27.635%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:1.955%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:27.781%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:EntityIncorporationStateCountryCode" format="ixt-sec:stateprovnameen" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6MDlmZTViMGI4NjYxNGRiNjgzOTc5YjI4MTJkYmU3MjYvdGFibGVyYW5nZTowOWZlNWIwYjg2NjE0ZGI2ODM5NzliMjgxMmRiZTcyNl8wLTAtMS0xLTc5MDMz_6023d443-0090-415d-ad77-23b268062fda">Michigan</ix:nonNumeric></span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:EntityFileNumber" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6MDlmZTViMGI4NjYxNGRiNjgzOTc5YjI4MTJkYmU3MjYvdGFibGVyYW5nZTowOWZlNWIwYjg2NjE0ZGI2ODM5NzliMjgxMmRiZTcyNl8wLTItMS0xLTc5MDMz_d3803c64-5024-46af-8a19-c613eae86517">000-18415</ix:nonNumeric></span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:EntityTaxIdentificationNumber" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6MDlmZTViMGI4NjYxNGRiNjgzOTc5YjI4MTJkYmU3MjYvdGFibGVyYW5nZTowOWZlNWIwYjg2NjE0ZGI2ODM5NzliMjgxMmRiZTcyNl8wLTQtMS0xLTc5MDMz_6cc45e4e-3aa2-4c02-81f0-65117ae67d74">38-2830092</ix:nonNumeric></span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(State or other jurisdiction<br/>of incorporation)</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(Commission<br/>File Number)</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(IRS Employer<br/>Identification No.)</span></td></tr></table></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:20.308%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:13.124%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.836%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.805%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:48.327%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:EntityAddressAddressLine1" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6YzBlODE2YWFjNTVhNDM3ODk0MTEzMWJlZjc5ZDdlYTMvdGFibGVyYW5nZTpjMGU4MTZhYWM1NWE0Mzc4OTQxMTMxYmVmNzlkN2VhM18wLTAtMS0xLTc5MDMz_db14e1e5-ae46-43e5-92c2-31a3a0e65d3e">401 North Main Street</ix:nonNumeric></span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:EntityAddressCityOrTown" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6YzBlODE2YWFjNTVhNDM3ODk0MTEzMWJlZjc5ZDdlYTMvdGFibGVyYW5nZTpjMGU4MTZhYWM1NWE0Mzc4OTQxMTMxYmVmNzlkN2VhM18wLTEtMS0xLTc5MDMz_154db98b-f006-48b5-9f5a-c501e151ed54">Mt. Pleasant</ix:nonNumeric></span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:EntityAddressStateOrProvince" format="ixt-sec:stateprovnameen" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6YzBlODE2YWFjNTVhNDM3ODk0MTEzMWJlZjc5ZDdlYTMvdGFibGVyYW5nZTpjMGU4MTZhYWM1NWE0Mzc4OTQxMTMxYmVmNzlkN2VhM18wLTItMS0xLTc5MDMz_f331e394-85a3-4bd8-9ddd-d3eb109c4f69">Michigan</ix:nonNumeric></span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:EntityAddressPostalZipCode" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6YzBlODE2YWFjNTVhNDM3ODk0MTEzMWJlZjc5ZDdlYTMvdGFibGVyYW5nZTpjMGU4MTZhYWM1NWE0Mzc4OTQxMTMxYmVmNzlkN2VhM18wLTQtMS0xLTc5MDMz_9928a10c-3567-4269-b0bb-fd8a917d4608">48858-1649</ix:nonNumeric></span></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(Address of principal executive offices)</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(Zip Code)</span></td></tr></table></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Registrant&#8217;s telephone number, including area code: (<ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:CityAreaCode" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGV4dHJlZ2lvbjo3ZWM2YTFkOTg2YzA0ZGIyYTY5ZDQxYTRhNGI1MjI3Nl8yMzQy_a86e23d8-987d-4b11-bf14-dc21742274ab">989</ix:nonNumeric>)&#160;<ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:LocalPhoneNumber" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGV4dHJlZ2lvbjo3ZWM2YTFkOTg2YzA0ZGIyYTY5ZDQxYTRhNGI1MjI3Nl8yMzQz_42a956d2-20c9-4fc7-b95d-a6c920be4b2d">772-9471</ix:nonNumeric></span></div><div style="margin-top:9pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Not Applicable</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:120%">(Former name or former address, if changed since last report.)</span></div><div style="margin-bottom:1pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:27.729%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:3pt"><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td></tr></table></div><div style="margin-top:4pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:4.647%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:93.153%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Wingdings',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:WrittenCommunications" format="ixt-sec:boolballotbox" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6NTE1MTAyMjYxNTcxNGU4YTk0OWEyMzI4NzIzNmFhNTcvdGFibGVyYW5nZTo1MTUxMDIyNjE1NzE0ZThhOTQ5YTIzMjg3MjM2YWE1N18wLTAtMS0xLTc5MDMz_028bbd81-6670-4f25-ba41-496171cb50fd">&#9744;</ix:nonNumeric></span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</span></td></tr></table></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:4.647%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:93.153%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Wingdings',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:SolicitingMaterial" format="ixt-sec:boolballotbox" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6NTc0Y2FmZmY2MDY2NDBlMTkyMjIwY2JhNzc4MzEwZTMvdGFibGVyYW5nZTo1NzRjYWZmZjYwNjY0MGUxOTIyMjBjYmE3NzgzMTBlM18wLTAtMS0xLTc5MDMz_3e7667d5-09e0-44a0-894e-e392570d5448">&#9744;</ix:nonNumeric></span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Soliciting material pursuant to Rule l4a-12 under the Exchange Act (17 CFR 240.l4a-l2)</span></td></tr></table></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:4.647%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:93.153%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Wingdings',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:PreCommencementTenderOffer" format="ixt-sec:boolballotbox" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6NWZmYjE0MDkzNmE1NGVkYWI4YTAyZmM5MDhjYmFiNDEvdGFibGVyYW5nZTo1ZmZiMTQwOTM2YTU0ZWRhYjhhMDJmYzkwOGNiYWI0MV8wLTAtMS0xLTc5MDMz_5c11804f-dc28-4d8f-8a1a-d42ec7de8da8">&#9744;</ix:nonNumeric></span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Pre-commencement communications pursuant to Rule l4d-2(b) under the Exchange Act (17 CFR 240.l4d-2(b))</span></td></tr></table></div><div style="margin-bottom:9pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:4.647%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:93.153%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Wingdings',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:PreCommencementIssuerTenderOffer" format="ixt-sec:boolballotbox" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6NWRjZDVhMDY4MDdhNGNhOGJmNmUyYmQzMzk2OTVkNzcvdGFibGVyYW5nZTo1ZGNkNWEwNjgwN2E0Y2E4YmY2ZTJiZDMzOTY5NWQ3N18wLTAtMS0xLTc5MDMz_59db1192-08d5-4e2b-ad5e-f654dd85422d">&#9744;</ix:nonNumeric></span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.l3e-4(c))</span></td></tr></table></div><div style="margin-bottom:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Securities registered pursuant to Section 12(b) of the Act:</span></div><div style="margin-bottom:9pt;margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:30.365%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:20.308%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:46.027%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Title of each class</span></td><td colspan="3" style="border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Trading<br/>Symbol(s)</span></td><td colspan="3" style="border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Name of each exchange on which registered</span></td></tr><tr><td colspan="3" style="border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">None</span></td><td colspan="3" style="border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">N/A</span></td><td colspan="3" style="border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">N/A</span></td></tr></table></div><div style="margin-bottom:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&#167;230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (&#167;240.12b-2 of this chapter).</span></div><div style="margin-bottom:1pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:68.296%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:23.756%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:4.648%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Emerging growth company</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Wingdings',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206" name="dei:EntityEmergingGrowthCompany" format="ixt-sec:boolballotbox" id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6MjdjNzcxNmQ3NGJkNGNiYTg0NTkyNmI4OGE4YjU4M2MvdGFibGVyYW5nZToyN2M3NzE2ZDc0YmQ0Y2JhODQ1OTI2Yjg4YThiNTgzY18wLTItMS0xLTc5MDMz_20171c7c-2fe8-4b45-a095-5834d98f3c51">&#9744;</ix:nonNumeric></span></td></tr></table></div><div style="margin-bottom:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.     &#9744;</span></div><div style="height:42.75pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div><hr style="page-break-after:always"/><div style="min-height:42.75pt;width:100%"><div><span><br/></span></div></div><div style="margin-bottom:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Section&#160;8 - Other Events</span></div><div style="margin-bottom:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Item 8.01 Other Events</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">.</span></div><div style="margin-bottom:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#160;&#160;&#160;&#160;On December&#160;6, 2022, the Corporation issued a press release announcing that its Board of Directors declared a twenty-eight cent ($0.28) per common share fourth quarter cash dividend, payable December&#160;16, 2022 to shareholders of record as of December&#160;14, 2022.</span></div><div style="margin-bottom:9pt;text-indent:38.25pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A copy of the press release is filed as Exhibit 99.1 to this Form 8-K and is incorporated herein by reference.</span></div><div style="margin-bottom:9pt;text-indent:38.25pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The information in this Item 8.01 of Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing made by the registrant under the Securities Act of 1933, whether made before or after the date hereof, except as shall be expressly set forth by specific reference in such filing.</span></div><div style="margin-bottom:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Section&#160;9 - Financial Statements and Exhibits</span></div><div style="margin-bottom:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;9.01 Financial Statements and Exhibits.</span></div><div style="margin-bottom:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">(d)&#160;&#160;&#160;&#160;Exhibits:</span></div><div style="margin-bottom:9pt;margin-top:5pt;text-indent:36pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:5.221%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.518%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:91.861%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Exhibit<br/>No.</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Description</span></td></tr><tr style="height:3pt"><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:center"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="isba_2022q4xdivannxex991.htm">99.1</a></span></div></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="isba_2022q4xdivannxex991.htm">Dividend press release issued December 6, 2022</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">104</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cover page interactive data file - the cover page XBRL tags are embedded within the inline XBRL document</span></td></tr></table></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">SIGNATURES</span></div><div style="margin-top:9pt;text-indent:49.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:120%">&#160;</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:98.132%"><tr><td style="width:1.0%"></td><td style="width:5.342%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:21.740%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:31.257%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:2.999%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:1.996%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:30.966%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">ISABELLA BANK CORPORATION</span></td></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Dated: </span></td><td colspan="3" style="padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">December 6, 2022</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">By:</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">/s/ Jae A. Evans</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Jae A. Evans, President &amp; CEO</span></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr></table></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div style="height:42.75pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div><hr style="page-break-after:always"/><div style="min-height:42.75pt;width:100%"><div><span><br/></span></div></div><div style="margin-top:5pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">INDEX TO EXHIBITS</span></div><div style="margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:5.221%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.518%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:91.861%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Exhibit<br/>No.</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Description</span></td></tr><tr style="height:3pt"><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="text-align:center"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="isba_2022q4xdivannxex991.htm">99.1</a></span></div></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:middle"><div><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="isba_2022q4xdivannxex991.htm">Dividend press release issued December 6, 2022</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">104</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cover page interactive data file - the cover page XBRL tags are embedded within the inline XBRL document</span></td></tr></table></div><div style="height:42.75pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div></body></html>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>isba_2022q4xdivannxex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head>
<!-- Document created using Wdesk -->
<!-- Copyright 2022 Workiva -->
<title>Document</title></head><body><div id="i056d0baadb354b818a57f80d9956da21_1"></div><div style="min-height:42.75pt;width:100%"><div><font><br></font></div></div><div style="text-align:right"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Exhibit 99.1</font></div><div><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:12pt;font-weight:700;line-height:120%">For Immediate Release</font></div><div><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:12pt;font-weight:400;line-height:120%">Isabella Bank Corporation</font></div><div><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:12pt;font-weight:400;line-height:120%">401 N. Main Street</font></div><div style="margin-bottom:3pt"><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:12pt;font-weight:400;line-height:120%">Mt. Pleasant, MI 48858</font></div><div><font><br></font></div><div style="margin-bottom:6pt"><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:12pt;font-weight:700;line-height:120%">FOR MORE INFORMATION, CONTACT&#58;</font></div><div style="margin-bottom:3pt"><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:12pt;font-weight:400;line-height:120%">Trish Tomczak, Director of Marketing</font></div><div style="margin-bottom:6pt"><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:12pt;font-weight:400;line-height:120%">Phone&#58;  989-779-6333  Fax&#58; 989-775-5501</font></div><div><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:14pt;font-weight:700;line-height:174%">Isabella Bank Corporation Increases Fourth Quarter 2022 Dividend</font></div><div style="margin-bottom:9pt;text-align:justify"><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:11pt;font-weight:400;line-height:174%">Mt. Pleasant, Michigan, December&#160;6, 2022 - Isabella Bank Corporation (OTCQX&#58;ISBA) today announced its Board of Directors declared a fourth-quarter cash dividend of $0.28 per common share at its regular meeting on November&#160;30, 2022. The $0.28 dividend represents a $0.01 or 3.7% increase from the third quarter dividend and brings year-to-date dividends to $1.09.  The dividend will be payable December&#160;16, 2022, to shareholders of record as of December&#160;14, 2022. Based on ISBA&#8217;s closing stock price of $22.70 per share as of November&#160;30, 2022, the annualized cash dividend yield is 4.93%.</font></div><div style="margin-bottom:9pt;text-align:justify"><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:11pt;font-weight:400;line-height:174%">&#8220;This dividend increase reflects the ongoing success of Isabella Bank's strategic initiatives,&#34; said Jae A. Evans, President and Chief Executive Officer.  &#34;This factor, coupled with our strong financial results for the first three quarters of this year, are serving ISBA shareholders exceptionally well.&#34;</font></div><div style="margin-bottom:9pt;text-align:justify"><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:11pt;font-weight:700;line-height:174%">About the Corporation</font></div><div style="margin-bottom:9pt;text-align:justify"><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:11pt;font-weight:400;line-height:174%">Isabella Bank Corporation (OTCQX&#58; ISBA) is the parent holding company of Isabella Bank, a state chartered community bank headquartered in Mt. Pleasant, Michigan. Isabella Bank was established in 1903 and has been committed to serving the local banking needs of its customers and communities for 119 years. The Bank offers personal and commercial lending and deposit products, as well as investment, trust and estate planning services through Isabella Wealth. The Bank has locations throughout seven Mid-Michigan counties&#58; Clare, Gratiot, Isabella, Mecosta, Midland, Montcalm, and Saginaw.</font></div><div style="margin-bottom:9pt;text-align:justify"><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:11pt;font-weight:400;line-height:174%">For more information about Isabella Bank Corporation, visit the Invest in Us link at www.isabellabank.com. Isabella Bank Corporation common stock is quoted on the OTCQX tier of the OTC Markets Group, Inc.&#8217;s electronic quotation system (www.otcmarkets.com) under the symbol &#8220;ISBA.&#8221; The Corporation's market maker is Boenning &#38; Scattergood, Inc. (www.boenninginc.com) and its investor relations firm is Renmark Financial Communications, Inc. (www.renmarkfinancial.com).</font></div><div style="margin-bottom:6pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:120%">Forward-Looking Statements</font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:8pt;font-weight:400;line-height:174%">This press release includes forward-looking statements. To the extent that the foregoing information refers to matters that may occur in the future, please be aware that such forward-looking statements may differ materially from actual results. Additional information concerning some of the factors that could cause materially different results is included in the sections entitled &#34;Risk Factors&#34; and &#34;Forward Looking Statements&#34; set forth in Isabella Bank Corporation's filings with the Securities and Exchange Commission, which are available from the Securities and Exchange Commission's Public Reference facilities and from its website at www.sec.gov.</font></div><div style="height:42.75pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div></body></html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>3
<FILENAME>isba-20221206.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:bd8fd121-275e-4961-9ed7-edbf3722fa46,g:253e889c-def5-4986-bc67-dc11a7ee5a93-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:isba="http://www.isabellabank.com/20221206" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.isabellabank.com/20221206">
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2021" schemaLocation="https://xbrl.sec.gov/dei/2021/dei-2021.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="isba-20221206_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="isba-20221206_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="Cover" roleURI="http://www.isabellabank.com/role/Cover">
        <link:definition>0000001 - Document - Cover</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
</xs:schema>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>4
<FILENAME>isba-20221206_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:bd8fd121-275e-4961-9ed7-edbf3722fa46,g:253e889c-def5-4986-bc67-dc11a7ee5a93-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_dei_PreCommencementTenderOffer_859eee4e-746e-4eb2-802e-d62d0574453f_terseLabel_en-US" xlink:label="lab_dei_PreCommencementTenderOffer" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pre-commencement Tender Offer</link:label>
    <link:label id="lab_dei_PreCommencementTenderOffer_label_en-US" xlink:label="lab_dei_PreCommencementTenderOffer" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pre-commencement Tender Offer</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_PreCommencementTenderOffer"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_PreCommencementTenderOffer" xlink:to="lab_dei_PreCommencementTenderOffer" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_AmendmentFlag_44ec4f53-9dbb-40f0-98eb-611bac88f975_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amendment Flag</link:label>
    <link:label id="lab_dei_AmendmentFlag_label_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amendment Flag</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_AmendmentFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag" xlink:to="lab_dei_AmendmentFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressStateOrProvince_31f04622-fea4-4fb3-ae46-4ef8c14d33f9_terseLabel_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:label id="lab_dei_EntityAddressStateOrProvince_label_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressStateOrProvince"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressStateOrProvince" xlink:to="lab_dei_EntityAddressStateOrProvince" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_93df02fc-69e8-40be-b1d9-666b675028e7_terseLabel_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_label_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityTaxIdentificationNumber" xlink:to="lab_dei_EntityTaxIdentificationNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFileNumber_dd1c1ef3-7bbb-4b72-bebe-0a53d35a4ac0_terseLabel_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity File Number</link:label>
    <link:label id="lab_dei_EntityFileNumber_label_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity File Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityFileNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFileNumber" xlink:to="lab_dei_EntityFileNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_WrittenCommunications_36d5bd53-aa18-4795-af50-77257a7bcb77_terseLabel_en-US" xlink:label="lab_dei_WrittenCommunications" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Written Communications</link:label>
    <link:label id="lab_dei_WrittenCommunications_label_en-US" xlink:label="lab_dei_WrittenCommunications" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Written Communications</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_WrittenCommunications"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_WrittenCommunications" xlink:to="lab_dei_WrittenCommunications" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_PreCommencementIssuerTenderOffer_9701d242-3e52-4fcb-b9d0-7afc2f32a829_terseLabel_en-US" xlink:label="lab_dei_PreCommencementIssuerTenderOffer" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pre-commencement Issuer Tender Offer</link:label>
    <link:label id="lab_dei_PreCommencementIssuerTenderOffer_label_en-US" xlink:label="lab_dei_PreCommencementIssuerTenderOffer" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pre-commencement Issuer Tender Offer</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_PreCommencementIssuerTenderOffer" xlink:to="lab_dei_PreCommencementIssuerTenderOffer" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_df14f81b-d128-4e25-9b95-bcf98805026d_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_label_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityEmergingGrowthCompany" xlink:to="lab_dei_EntityEmergingGrowthCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentPeriodEndDate_c33cd51d-ab00-406c-ae50-4e447e17655f_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Period End Date</link:label>
    <link:label id="lab_dei_DocumentPeriodEndDate_label_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Period End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentPeriodEndDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentPeriodEndDate" xlink:to="lab_dei_DocumentPeriodEndDate" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_SolicitingMaterial_0fa7ddd7-b43e-4a4b-a933-fb8efb5c0f3c_terseLabel_en-US" xlink:label="lab_dei_SolicitingMaterial" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Soliciting Material</link:label>
    <link:label id="lab_dei_SolicitingMaterial_label_en-US" xlink:label="lab_dei_SolicitingMaterial" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Soliciting Material</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_SolicitingMaterial"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SolicitingMaterial" xlink:to="lab_dei_SolicitingMaterial" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentType_8c9d2ea0-0bb5-4176-8e41-7159a2217f28_terseLabel_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_label_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentType"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType" xlink:to="lab_dei_DocumentType" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CityAreaCode_c16af7d0-3d3d-41e6-ac34-de1637150624_terseLabel_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:label id="lab_dei_CityAreaCode_label_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_CityAreaCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CityAreaCode" xlink:to="lab_dei_CityAreaCode" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_9124a805-4cd7-4992-b3f2-990766858a9b_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_label_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityIncorporationStateCountryCode" xlink:to="lab_dei_EntityIncorporationStateCountryCode" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine1_dfa71b94-fb01-49d4-87f8-3122ceb60952_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine1_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressAddressLine1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine1" xlink:to="lab_dei_EntityAddressAddressLine1" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityRegistrantName_1b5c668a-2d65-4018-9d3a-befe991ce2d3_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_label_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityRegistrantName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName" xlink:to="lab_dei_EntityRegistrantName" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LocalPhoneNumber_9704030d-4892-4e22-b3cd-453510676e0d_terseLabel_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:label id="lab_dei_LocalPhoneNumber_label_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LocalPhoneNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber" xlink:to="lab_dei_LocalPhoneNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressCityOrTown_7ae9f506-1e9f-4d1b-9d6d-037beac057e7_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:label id="lab_dei_EntityAddressCityOrTown_label_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressCityOrTown"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCityOrTown" xlink:to="lab_dei_EntityAddressCityOrTown" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CoverAbstract_label_en-US" xlink:label="lab_dei_CoverAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cover [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_CoverAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CoverAbstract" xlink:to="lab_dei_CoverAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressPostalZipCode_337fd1d7-d204-4a66-8bc9-8f0b18013917_terseLabel_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:label id="lab_dei_EntityAddressPostalZipCode_label_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressPostalZipCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressPostalZipCode" xlink:to="lab_dei_EntityAddressPostalZipCode" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCentralIndexKey_2a4af82b-2a33-4de5-a135-279cff5a8f66_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityCentralIndexKey"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
  </link:labelLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>5
<FILENAME>isba-20221206_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:bd8fd121-275e-4961-9ed7-edbf3722fa46,g:253e889c-def5-4986-bc67-dc11a7ee5a93-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.isabellabank.com/role/Cover" xlink:type="simple" xlink:href="isba-20221206.xsd#Cover"/>
  <link:presentationLink xlink:role="http://www.isabellabank.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_2af28d3d-769e-4c88-bfd3-8544a509cf8f" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_DocumentType_2af28d3d-769e-4c88-bfd3-8544a509cf8f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_1c26679c-2812-4d7a-ba9d-2eb0bf00296e" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_DocumentPeriodEndDate_1c26679c-2812-4d7a-ba9d-2eb0bf00296e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_3c7a1983-2724-42fd-a594-f508d9c12fc9" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_EntityRegistrantName_3c7a1983-2724-42fd-a594-f508d9c12fc9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_96cfb62b-bae9-4e7d-bee3-b2aec2564e67" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_EntityIncorporationStateCountryCode_96cfb62b-bae9-4e7d-bee3-b2aec2564e67" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_55279e8d-156b-476d-a1c5-8b594484c365" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_EntityFileNumber_55279e8d-156b-476d-a1c5-8b594484c365" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_b58027e0-ddf7-4c62-af1f-d56dde2cc94a" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_EntityTaxIdentificationNumber_b58027e0-ddf7-4c62-af1f-d56dde2cc94a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_16d438b8-1b08-43b1-bc33-009ae4a83cca" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_EntityAddressAddressLine1_16d438b8-1b08-43b1-bc33-009ae4a83cca" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_0715180f-aa92-47ef-8a70-03410b59b028" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_EntityAddressCityOrTown_0715180f-aa92-47ef-8a70-03410b59b028" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_6c00afee-53d7-4c0b-bb5a-387cd47e523e" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_EntityAddressStateOrProvince_6c00afee-53d7-4c0b-bb5a-387cd47e523e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_06305969-9667-41e0-b00d-2654de386d0a" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_EntityAddressPostalZipCode_06305969-9667-41e0-b00d-2654de386d0a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_42d6536a-bbbb-491a-be8e-5514a8723a66" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_CityAreaCode_42d6536a-bbbb-491a-be8e-5514a8723a66" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_8085bff0-94ba-49ee-a4a2-0879765db6e3" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_LocalPhoneNumber_8085bff0-94ba-49ee-a4a2-0879765db6e3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_fa6c051c-eca5-4d8b-b3c9-2bc451d0e07b" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_WrittenCommunications_fa6c051c-eca5-4d8b-b3c9-2bc451d0e07b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_9c8f6d55-eea2-4a8f-8755-8d2881e0b63b" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_SolicitingMaterial_9c8f6d55-eea2-4a8f-8755-8d2881e0b63b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_098d3dd1-4d15-4d40-a297-8a8a514a123c" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_PreCommencementTenderOffer_098d3dd1-4d15-4d40-a297-8a8a514a123c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_db1a8a79-b046-44a9-bb40-3eeca07b9d72" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_db1a8a79-b046-44a9-bb40-3eeca07b9d72" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_e542da1b-3f16-4b55-aa62-7b656d7bf55d" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_EntityEmergingGrowthCompany_e542da1b-3f16-4b55-aa62-7b656d7bf55d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_8cfd6d5b-ed06-4123-a607-898a59029ba5" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_EntityCentralIndexKey_8cfd6d5b-ed06-4123-a607-898a59029ba5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_5e92e733-0f8d-4dd1-9058-8d23d163c587" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_6459ba88-2c1e-4670-9ed7-bf79bbe9be96" xlink:to="loc_dei_AmendmentFlag_5e92e733-0f8d-4dd1-9058-8d23d163c587" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>6
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
							if (e.nextSibling.style.display=='none') {
							e.nextSibling.style.display='block';
							} else { e.nextSibling.style.display='none'; }
							}</script>
</head>
<body>
<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140536712987152">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Cover<br></strong></div></th>
<th class="th"><div>Dec. 06, 2022</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CoverAbstract', window );"><strong>Cover [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Dec.  06,  2022<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">ISABELLA BANK CORP<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation, State or Country Code</a></td>
<td class="text">MI<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">000-18415<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">38-2830092<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">401 North Main Street<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Mt. Pleasant<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">MI<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">48858-1649<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">989<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">772-9471<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre-commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre-commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0000842517<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CoverAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Cover page.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CoverAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SolicitingMaterial">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Section 14a<br> -Number 240<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_WrittenCommunications</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>7
<FILENAME>isba-20221206_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2021"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="isba-20221206.xsd" xlink:type="simple"/>
    <context id="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000842517</identifier>
        </entity>
        <period>
            <startDate>2022-12-06</startDate>
            <endDate>2022-12-06</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl80L2ZyYWc6ZDMxMmJmYTBiMGFmNDhlM2I1NWU1YjNhZTBmN2JlNjkvdGFibGU6N2I2NTQzMjI5NDk3NGM2Mjk4ZDAxYTZkMjIwNjliMWEvdGFibGVyYW5nZTo3YjY1NDMyMjk0OTc0YzYyOThkMDFhNmQyMjA2OWIxYV8yLTEtMS0xLTc5MDMz_5fb72051-6dae-449f-ba1a-590daab04075">0000842517</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl80L2ZyYWc6ZDMxMmJmYTBiMGFmNDhlM2I1NWU1YjNhZTBmN2JlNjkvdGFibGU6N2I2NTQzMjI5NDk3NGM2Mjk4ZDAxYTZkMjIwNjliMWEvdGFibGVyYW5nZTo3YjY1NDMyMjk0OTc0YzYyOThkMDFhNmQyMjA2OWIxYV8zLTEtMS0xLTc5MDMz_caebd119-5ee2-4394-b1fe-86ebac8e8aec">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGV4dHJlZ2lvbjo3ZWM2YTFkOTg2YzA0ZGIyYTY5ZDQxYTRhNGI1MjI3Nl8yMzQw_f9a49b47-4899-43e0-b63b-ece68ab78bcb">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGV4dHJlZ2lvbjo3ZWM2YTFkOTg2YzA0ZGIyYTY5ZDQxYTRhNGI1MjI3Nl8yMzA_0b2e2355-ad8a-4846-a50a-9bc608232389">2022-12-06</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGV4dHJlZ2lvbjo3ZWM2YTFkOTg2YzA0ZGIyYTY5ZDQxYTRhNGI1MjI3Nl8yMzQx_512505cb-08fb-4be7-9b3c-3eeeca47ff74">ISABELLA BANK CORP</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6MDlmZTViMGI4NjYxNGRiNjgzOTc5YjI4MTJkYmU3MjYvdGFibGVyYW5nZTowOWZlNWIwYjg2NjE0ZGI2ODM5NzliMjgxMmRiZTcyNl8wLTAtMS0xLTc5MDMz_6023d443-0090-415d-ad77-23b268062fda">MI</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6MDlmZTViMGI4NjYxNGRiNjgzOTc5YjI4MTJkYmU3MjYvdGFibGVyYW5nZTowOWZlNWIwYjg2NjE0ZGI2ODM5NzliMjgxMmRiZTcyNl8wLTItMS0xLTc5MDMz_d3803c64-5024-46af-8a19-c613eae86517">000-18415</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6MDlmZTViMGI4NjYxNGRiNjgzOTc5YjI4MTJkYmU3MjYvdGFibGVyYW5nZTowOWZlNWIwYjg2NjE0ZGI2ODM5NzliMjgxMmRiZTcyNl8wLTQtMS0xLTc5MDMz_6cc45e4e-3aa2-4c02-81f0-65117ae67d74">38-2830092</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6YzBlODE2YWFjNTVhNDM3ODk0MTEzMWJlZjc5ZDdlYTMvdGFibGVyYW5nZTpjMGU4MTZhYWM1NWE0Mzc4OTQxMTMxYmVmNzlkN2VhM18wLTAtMS0xLTc5MDMz_db14e1e5-ae46-43e5-92c2-31a3a0e65d3e">401 North Main Street</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6YzBlODE2YWFjNTVhNDM3ODk0MTEzMWJlZjc5ZDdlYTMvdGFibGVyYW5nZTpjMGU4MTZhYWM1NWE0Mzc4OTQxMTMxYmVmNzlkN2VhM18wLTEtMS0xLTc5MDMz_154db98b-f006-48b5-9f5a-c501e151ed54">Mt. Pleasant</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6YzBlODE2YWFjNTVhNDM3ODk0MTEzMWJlZjc5ZDdlYTMvdGFibGVyYW5nZTpjMGU4MTZhYWM1NWE0Mzc4OTQxMTMxYmVmNzlkN2VhM18wLTItMS0xLTc5MDMz_f331e394-85a3-4bd8-9ddd-d3eb109c4f69">MI</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6YzBlODE2YWFjNTVhNDM3ODk0MTEzMWJlZjc5ZDdlYTMvdGFibGVyYW5nZTpjMGU4MTZhYWM1NWE0Mzc4OTQxMTMxYmVmNzlkN2VhM18wLTQtMS0xLTc5MDMz_9928a10c-3567-4269-b0bb-fd8a917d4608">48858-1649</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGV4dHJlZ2lvbjo3ZWM2YTFkOTg2YzA0ZGIyYTY5ZDQxYTRhNGI1MjI3Nl8yMzQy_a86e23d8-987d-4b11-bf14-dc21742274ab">989</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGV4dHJlZ2lvbjo3ZWM2YTFkOTg2YzA0ZGIyYTY5ZDQxYTRhNGI1MjI3Nl8yMzQz_42a956d2-20c9-4fc7-b95d-a6c920be4b2d">772-9471</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6NTE1MTAyMjYxNTcxNGU4YTk0OWEyMzI4NzIzNmFhNTcvdGFibGVyYW5nZTo1MTUxMDIyNjE1NzE0ZThhOTQ5YTIzMjg3MjM2YWE1N18wLTAtMS0xLTc5MDMz_028bbd81-6670-4f25-ba41-496171cb50fd">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6NTc0Y2FmZmY2MDY2NDBlMTkyMjIwY2JhNzc4MzEwZTMvdGFibGVyYW5nZTo1NzRjYWZmZjYwNjY0MGUxOTIyMjBjYmE3NzgzMTBlM18wLTAtMS0xLTc5MDMz_3e7667d5-09e0-44a0-894e-e392570d5448">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6NWZmYjE0MDkzNmE1NGVkYWI4YTAyZmM5MDhjYmFiNDEvdGFibGVyYW5nZTo1ZmZiMTQwOTM2YTU0ZWRhYjhhMDJmYzkwOGNiYWI0MV8wLTAtMS0xLTc5MDMz_5c11804f-dc28-4d8f-8a1a-d42ec7de8da8">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6NWRjZDVhMDY4MDdhNGNhOGJmNmUyYmQzMzk2OTVkNzcvdGFibGVyYW5nZTo1ZGNkNWEwNjgwN2E0Y2E4YmY2ZTJiZDMzOTY5NWQ3N18wLTAtMS0xLTc5MDMz_59db1192-08d5-4e2b-ad5e-f654dd85422d">false</dei:PreCommencementIssuerTenderOffer>
    <dei:EntityEmergingGrowthCompany
      contextRef="i904ec35f09604dfe8c865744f66fa194_D20221206-20221206"
      id="id3VybDovL2RvY3MudjEvZG9jOmFlMjc5MTIxNmNlYTQ1NGY4NTdjZWUzNzhlOWQwNzg2L3NlYzphZTI3OTEyMTZjZWE0NTRmODU3Y2VlMzc4ZTlkMDc4Nl8xL2ZyYWc6N2VjNmExZDk4NmMwNGRiMmE2OWQ0MWE0YTRiNTIyNzYvdGFibGU6MjdjNzcxNmQ3NGJkNGNiYTg0NTkyNmI4OGE4YjU4M2MvdGFibGVyYW5nZToyN2M3NzE2ZDc0YmQ0Y2JhODQ1OTI2Yjg4YThiNTgzY18wLTItMS0xLTc5MDMz_20171c7c-2fe8-4b45-a095-5834d98f3c51">false</dei:EntityEmergingGrowthCompany>
</xbrl>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EXCEL
<SEQUENCE>8
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 Financial_Report.xlsx
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ME9==;^(X%(;_BI65]JHT'P0('4 "VNZB?J'2V9%VM1<F,6!-8F=M4\J_G^-
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MS([!0)!Q<;C2C^-$G 0$P9F X!@0%-R'/RHH;ZFAHX&2.Z+LVZ!F&\50BVB
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M:%0*CMQC)8QQ8K3^-8+)#^Q^ %!+ P04    " "C6X95JL0B%C,!   B @
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M-_=%KLWC":[?#'!X=/X!4$L#!!0    ( *-;AE5ED'F2&0$  ,\#   3
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M  !X;"]W;W)K8F]O:RYX;6Q02P$"% ,4    " "C6X95)!Z;HJT   #X 0
M&@              @ %%$0  >&PO7W)E;',O=V]R:V)O;VLN>&UL+G)E;'-0
M2P$"% ,4    " "C6X9599!YDAD!  #/ P  $P              @ $J$@
I6T-O;G1E;G1?5'EP97-=+GAM;%!+!08     "0 ) #X"  !T$P     !

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>9
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
// Edgar(tm) Renderer was created by staff of the U.S. Securities and Exchange Commission.  Data and content created by government employees within the scope of their employment are not subject to domestic copyright protection. 17 U.S.C. 105.
var Show={};Show.LastAR=null,Show.showAR=function(a,r,w){if(Show.LastAR)Show.hideAR();var e=a;while(e&&e.nodeName!='TABLE')e=e.nextSibling;if(!e||e.nodeName!='TABLE'){var ref=((window)?w.document:document).getElementById(r);if(ref){e=ref.cloneNode(!0);
e.removeAttribute('id');a.parentNode.appendChild(e)}}
if(e)e.style.display='block';Show.LastAR=e};Show.hideAR=function(){Show.LastAR.style.display='none'};Show.toggleNext=function(a){var e=a;while(e.nodeName!='DIV')e=e.nextSibling;if(!e.style){}else if(!e.style.display){}else{var d,p_;if(e.style.display=='none'){d='block';p='-'}else{d='none';p='+'}
e.style.display=d;if(a.textContent){a.textContent=p+a.textContent.substring(1)}else{a.innerText=p+a.innerText.substring(1)}}}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>10
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
/* Updated 2009-11-04 */
/* v2.2.0.24 */

/* DefRef Styles */
..report table.authRefData{
	background-color: #def;
	border: 2px solid #2F4497;
	font-size: 1em;
	position: absolute;
}

..report table.authRefData a {
	display: block;
	font-weight: bold;
}

..report table.authRefData p {
	margin-top: 0px;
}

..report table.authRefData .hide {
	background-color: #2F4497;
	padding: 1px 3px 0px 0px;
	text-align: right;
}

..report table.authRefData .hide a:hover {
	background-color: #2F4497;
}

..report table.authRefData .body {
	height: 150px;
	overflow: auto;
	width: 400px;
}

..report table.authRefData table{
	font-size: 1em;
}

/* Report Styles */
..pl a, .pl a:visited {
	color: black;
	text-decoration: none;
}

/* table */
..report {
	background-color: white;
	border: 2px solid #acf;
	clear: both;
	color: black;
	font: normal 8pt Helvetica, Arial, san-serif;
	margin-bottom: 2em;
}

..report hr {
	border: 1px solid #acf;
}

/* Top labels */
..report th {
	background-color: #acf;
	color: black;
	font-weight: bold;
	text-align: center;
}

..report th.void	{
	background-color: transparent;
	color: #000000;
	font: bold 10pt Helvetica, Arial, san-serif;
	text-align: left;
}

..report .pl {
	text-align: left;
	vertical-align: top;
	white-space: normal;
	width: 200px;
	white-space: normal; /* word-wrap: break-word; */
}

..report td.pl a.a {
	cursor: pointer;
	display: block;
	width: 200px;
	overflow: hidden;
}

..report td.pl div.a {
	width: 200px;
}

..report td.pl a:hover {
	background-color: #ffc;
}

/* Header rows... */
..report tr.rh {
	background-color: #acf;
	color: black;
	font-weight: bold;
}

/* Calendars... */
..report .rc {
	background-color: #f0f0f0;
}

/* Even rows... */
..report .re, .report .reu {
	background-color: #def;
}

..report .reu td {
	border-bottom: 1px solid black;
}

/* Odd rows... */
..report .ro, .report .rou {
	background-color: white;
}

..report .rou td {
	border-bottom: 1px solid black;
}

..report .rou table td, .report .reu table td {
	border-bottom: 0px solid black;
}

/* styles for footnote marker */
..report .fn {
	white-space: nowrap;
}

/* styles for numeric types */
..report .num, .report .nump {
	text-align: right;
	white-space: nowrap;
}

..report .nump {
	padding-left: 2em;
}

..report .nump {
	padding: 0px 0.4em 0px 2em;
}

/* styles for text types */
..report .text {
	text-align: left;
	white-space: normal;
}

..report .text .big {
	margin-bottom: 1em;
	width: 17em;
}

..report .text .more {
	display: none;
}

..report .text .note {
	font-style: italic;
	font-weight: bold;
}

..report .text .small {
	width: 10em;
}

..report sup {
	font-style: italic;
}

..report .outerFootnotes {
	font-size: 1em;
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>11
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.2.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1</ContextCount>
  <ElementCount>19</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>0</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>0</UnitCount>
  <MyReports>
    <Report instance="isba-20221206.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.isabellabank.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="8-K" original="isba-20221206.htm">isba-20221206.htm</File>
    <File>isba-20221206.xsd</File>
    <File>isba-20221206_lab.xml</File>
    <File>isba-20221206_pre.xml</File>
    <File>isba_2022q4xdivannxex991.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="19">http://xbrl.sec.gov/dei/2021</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>13
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
{
 "instance": {
  "isba-20221206.htm": {
   "axisCustom": 0,
   "axisStandard": 0,
   "contextCount": 1,
   "dts": {
    "inline": {
     "local": [
      "isba-20221206.htm"
     ]
    },
    "labelLink": {
     "local": [
      "isba-20221206_lab.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "isba-20221206_pre.xml"
     ]
    },
    "schema": {
     "local": [
      "isba-20221206.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd",
      "https://xbrl.sec.gov/dei/2021/dei-2021.xsd"
     ]
    }
   },
   "elementCount": 20,
   "entityCount": 1,
   "hidden": {
    "http://xbrl.sec.gov/dei/2021": 2,
    "total": 2
   },
   "keyCustom": 0,
   "keyStandard": 19,
   "memberCustom": 0,
   "memberStandard": 0,
   "nsprefix": "isba",
   "nsuri": "http://www.isabellabank.com/20221206",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "isba-20221206.htm",
      "contextRef": "i904ec35f09604dfe8c865744f66fa194_D20221206-20221206",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "0000001 - Document - Cover",
     "role": "http://www.isabellabank.com/role/Cover",
     "shortName": "Cover",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "isba-20221206.htm",
      "contextRef": "i904ec35f09604dfe8c865744f66fa194_D20221206-20221206",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    }
   },
   "segmentCount": 0,
   "tag": {
    "dei_AmendmentFlag": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.",
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code",
        "terseLabel": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_CoverAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cover page.",
        "label": "Cover [Abstract]"
       }
      }
     },
     "localname": "CoverAbstract",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "xbrltype": "stringItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.",
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentType": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.",
        "label": "Document Type",
        "terseLabel": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "submissionTypeItemType"
    },
    "dei_EntityAddressAddressLine1": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name",
        "label": "Entity Address, Address Line One",
        "terseLabel": "Entity Address, Address Line One"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address, City or Town",
        "terseLabel": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address, Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address, State or Province",
        "terseLabel": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r3"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.",
        "label": "Entity Central Index Key",
        "terseLabel": "Entity Central Index Key"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "centralIndexKeyItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r3"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityFileNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.",
        "label": "Entity File Number",
        "terseLabel": "Entity File Number"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityIncorporationStateCountryCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Two-character EDGAR code representing the state or country of incorporation.",
        "label": "Entity Incorporation, State or Country Code",
        "terseLabel": "Entity Incorporation, State or Country Code"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r3"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.",
        "label": "Entity Registrant Name",
        "terseLabel": "Entity Registrant Name"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r3"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.",
        "label": "Entity Tax Identification Number",
        "terseLabel": "Entity Tax Identification Number"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_PreCommencementIssuerTenderOffer": {
     "auth_ref": [
      "r0"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.",
        "label": "Pre-commencement Issuer Tender Offer",
        "terseLabel": "Pre-commencement Issuer Tender Offer"
       }
      }
     },
     "localname": "PreCommencementIssuerTenderOffer",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_PreCommencementTenderOffer": {
     "auth_ref": [
      "r1"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.",
        "label": "Pre-commencement Tender Offer",
        "terseLabel": "Pre-commencement Tender Offer"
       }
      }
     },
     "localname": "PreCommencementTenderOffer",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_SolicitingMaterial": {
     "auth_ref": [
      "r2"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.",
        "label": "Soliciting Material",
        "terseLabel": "Soliciting Material"
       }
      }
     },
     "localname": "SolicitingMaterial",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_WrittenCommunications": {
     "auth_ref": [
      "r4"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.",
        "label": "Written Communications",
        "terseLabel": "Written Communications"
       }
      }
     },
     "localname": "WrittenCommunications",
     "nsuri": "http://xbrl.sec.gov/dei/2021",
     "presentation": [
      "http://www.isabellabank.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    }
   },
   "unitCount": 0
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13e",
   "Subsection": "4c"
  },
  "r1": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "14d",
   "Subsection": "2b"
  },
  "r2": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "14a",
   "Subsection": "12"
  },
  "r3": {
   "Name": "Regulation 12B",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r4": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "425"
  }
 },
 "version": "2.1"
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>14
<FILENAME>0000842517-22-000214-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 0000842517-22-000214-xbrl.zip
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MRHX*4$'V?U;/0FU<U@I =T2<I!P/@H!$XT_PJP6M)&&_+$/UO%\"\;U6K^S
M0+,HES4PJ\,)_3 J_RFF/Y]<& C!)8'GC\O_MKP V-ED0W06!J3W[X\Q2%QH
M,_+<+&/L35A9TJ"5].,PZU@)ZN%2>M91X"3HVH59LZH5=&X=6-7S^7[=Z=&V
M4'M>/;PXJUFUZCDZ,"NH^O?A?P_,XRHZK!M&[?R\5C<WV 6\4A>N2-SV>JTD
M['U$E?QA'G1M5=$7R%XS<?H]VI2EM/WK3ZDH?GIP".^PL/H "R?$]MDLOQU&
ML$0%(-XG_9B59_]\FBEAF=HHI(5F"\0.DR0,T@; KDD\A_C31M+VLN3IZL2E
M? GK?($F@ 0)G34\7;OY=.T6$KJ8IFMY77PX6<Q+-VF%M.YHEF$Z8+"&<VDY
MZ!0?KB\Y.7>OW].>2/T$Q:'O432;OSZA%%B@+"(IK>6VF4(Z%!OA7G&-'#+M
MN;Y%.'=4/S/0"RI],U,[,UDVJ?.-9CJ?B2\[9E =-2M=Q0R,H7E\YAE!%?2N
M4Q%T-K%AG7FF51N;DP;H;Y<*_>\WOXG]:[L3RLTK S>LHV[=:N'&Y$!L'M?&
M#:NA-BNGH/N=M<WCF@3Z'U"GC8W)Z?"'JQ-%MY62H&BZ#CH;$P6[*-L"<UA1
M(W9)LQT[MZ\)?RUJ;$\ [!V\W/:;P_!:L.4.K"NOLF)7$Y0@Z<^JIH7.JM_K
M9];6R_7O@R@>D%Z"DA"=,X<[/S*PE&041DA2]^@'%+HH:3.>/HB\Q(/6JR.G
M#48)0P=.PI,E7596$<"O@ZVK=9VK\)SV,]8/HP3MS3XS DH\BQ/$KKD3,DJ3
M&?U0?@T@_IZ:$M7,P,BAS",%U8^2,H5OA #:;/-B B5C80RT"JSW[I#[X(=H
M8X9E514(U0B@MU(4B"H20;>=HJAA&<N:#E,,.![8+,I8NO@Q]1#_$I1O7+W=
M7O5IIV#_A@HV5E;"TA?W/9^QEA=S)WUB0LJ[ [S3T0]5PJJH.K8@:JXM*#8K
M =C)CB SQARBE%RWI.3V:^<'7ZLG)P?HZX'Y%SJLGWV_#W?ULP-KLQZ'^Z"S
MG*7VJB,"R@5G!"Z5HQL&0"1&<9\YW.U'D==#7A(C4$= 2$<?WA:8[Z!TP\;$
M%O/ '6_$/%>\.@](HI@7LZE\*A/(Q;Q>4E9B@J>D27E=59]9\F%B@=>+\O.J
MW0BQ)6TU@J;+ZZ&U-%LNN#_B"V81=!8X).R_ODP07T7-J/6<, )[+XT".$_
MXCH,![TD&A^&=-X<X[LE?,\H8?THO.;UO%$[+-LU-2I^T+0N/>.XIIB=QHB7
M,3NM2=URU$:GIAC6MVXCN)"-3N/^KNFP?M7TS:O:L-%I8;-3Y:H,KE<,U9SX
MGM%IC8S@S&M:SAAH')Y8!_.[ID41RU119$$4=5%0))6"25<J"5BV<5$3B]BE
M)+=O>$[;:Y'>@[;;= T\PMYSTF"W$GZV$HX\GT'M8#SON'H%KJ[-<S65-5%V
MBHJ@BE@1E")Q!0V&7G"*DLP(@_F02NE^MB!IP/._P-9+>-5G[H)4SP3ZNIGU
M_B;&@KXC+M%W=NMOE?5GD5%M&MS@I-)HMQA77HRG]T2,XR@J4Y@@$X(%Q1&Q
MH$FN*, BE$J$%4N46\ZR)F!-!BGTL(/P)92IUUF8RYEX+]5PN)\_3-HL0IU!
MY,742W<!TH@1L+N]NQK1APW+VXT.UF$8!%X<S\:&"TB4+<JG#,N[QNN-SE_M
M[!Q5@[X?CEF4SN \OB(SS']87.I+7 9OQOK&8EX6M;6;GI*<E_#SC/I'J\5Y
M32ZNW?P6\YJX?O-;T?(R+NW,[_4J/0>41BR.IW].@ #I#2L\C<E7OUZIXL;5
M4<>T+MMFQ9#KE:YH6-6)<?7-;P+=S0H%FHU["D^_8QQ?@$+4;#>N#,F$^CE=
M=>MT9%C&J!%<!J#X=(&FMB$ML:FI+2E,8JI F%+D42VJH&,'"[)$9"*RHDIE
MEMM71 DP+TK:R"!>#YTG$6/)>BV1]\K A_!O/0*]]2V[A%Z/?>\%TDNJ0FU=
MLP57A,%6-!O8UU6)X*BBQ"158E0%?=U(\NB[SPCPPXYKU\*UJ350C[Y'X;67
M'O#Z?=V=K\?;]QQ#KBQ+C!\-T50B"XI--4&GE J R+8DZ@Y,G+X6=^>[MC-^
M_[7Z/83%Z#>]?K8QL5N(/UV(]YQ"NHXU(HF.(*O%DJ#@HB[8H@TRAVI$ETI4
M*8H:Z$B:IFJ"5.1''9[J%-*WBG]7-)*G[,4C+OH12 &O3WS$1LP9)-XU#\0
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MQ-T2_0!=O_0XLJ1; MI4<YMAFY"KK)^99R=OUN_$R_]Y\.3-_P%02P,$%
M  @ HUN&5; 02\X5!@  Y"H  !4   !I<V)A+3(P,C(Q,C V7W!R92YX;6S5
MFEMOV\82Q]_]*53U]:RU%^YRUXA=^+A)8=1MC"1%BO,B[&56)D*1PI*.[6_?
M(6TW<9SD$"8!,X A4=20,_.?GV8O](M?KK?EXB.DIJBKPR7;I\L%5+X.1;4Y
M7/[U[A71RU^.]O9>_$3(W_]]<[;XM?:76ZC:Q4D"VT)87!7MQ>)]@.;#(J9Z
MNWA?IP_%1TO(47_12;V[2<7FHEUPROF7WZ8#%W0,C#/"<PDD,XH1 R$G$%P4
M.>?19NH_FP,N!6AM/ D0)9II19Q7.0F>,9L#2&M$?].RJ#X<="_.-K# Y*JF
M_WBXO&C;W<%J=75UM7_M4KE?I\V*4RI6]];+._/K1_97HK=FQIA5_^V_IDWQ
M-4.\+5O]_<?96W\!6TN*JFEMY3L'37'0]"?/:F_;7O/_&]?BFQ;=)W)O1KI3
MA'$BV/YU$Y9'>XO%K1RI+N$-Q$7W_M>;TP<NB\8Z*$OK;/5AW]?;56>T.JD1
M"0RWO[R]V<'ALBFVNQ+NSUTDB(?+HG&6='5EG*K.Z<^W%ZX^^=XE:!"7/M<S
M/'%W?>?E:7' =0M5@-O\[KV4M7]@5';JUO]>67;W[L^N Q3K_J['KFF3]>U:
M9=(XJS7AGB&!*J>W!+J8&^? X)]ZF'87=H-Q]\5HP.]OZH\KO#$6A;/NH-.D
M+\+/C]S=:O.TN.]_>^_0=LUMY#J(0')E,&R/";@8!-$RRZRDQD<=1X7]N;>'
M47]>T^/D%W4*D+!YW+NSR3^J[T-P[RQ6.YOP1L1?%&6XO[KK(E/4JJTG4.ZV
M+!CN<H%91T@)PMEM5;Z97)]9BRT5>LLI*GX.J:C#RRK\BCUWS3Q7*L=FR#7^
MW+.06^*L"82#HRY2RHV"24K_P.T@!OC\&7BZEL\,P\NJ+=J;-[ I.B6J]D^[
MA;7PN65&"QP_>48R'@.QTF0D2JJ#\8Q';T:Q\#6O@U 0\T5AM)*S(.$4YVEI
M5Z=>^+>H/YS4EU6;;D[J &NC?'2*.\09#,D@#\0!".*X!<^ERD#E$X#QW2 &
M<9+-G9/I=)X%-J^*$OZ\W#I(:REY;D 'PJ1R),L5(L^\)-HA^)G.O%!R D8^
M>1P$A)P[$$]4<!;5?V>O3P-J5<3B=@%REXB3FO(<* DAYC@I4IS8R"()4H4
MW'N3V0E0^(;[05RHN7,QA;:S@.0X!"Q!<_>&RS9@:Z9")K33A#FJ228<PQ6X
M$(128R&S6G@_!2!?<3T(CGSN<(S5=$Y@G.#AZ_2NOJK6-&>2:1J)M0;GSSE$
MHBTJ0T7&*#9!1[F>#HM/C@=!H7\0*)ZHYYR0Z.=%K]-YJC\6E8>U\I3:"$"D
M"%W/HSA!<M(2H7,?,"W)Q;@UZO>\#X+#_"!PC%%V3H2<UTUKR_\5NW[:3)6@
MTBA##"Z_2<9P='24XKI;R2R T"K0"8>3![Z';6;1'P2/I\OZS'!T3>\X@>WC
MSGA04BB+*#N<1QN&1Z"1<<EP',RYL&KD)NQGWH8!,./MS"=+]\PE[QYZE.<7
M=76_?-)42Q<CIITYB[%C5[.9Y83JW.1*!J= C"K[EQZ'E7[&NYBC)'SF\K]/
M1=M"=5)OMY?5W1*I64>+(YIDGH"WDF1!XW@FO"'<^4RR0('F;A0#7W4[#(09
M[V&.%_.9:7A;EX4OVJ+:_($3G%38<FV\CBI(20"08.Q>./G-\:,.7&L<RYP2
MXU!X[',8!S/>HQPIXS-#<)Z@(QAP8ML_G^L>[:;7$>-84],]I L,*68=RADE
MEIL<ET/:=D,;X\*/@N';OH=!,>-]RHEDG1<<ITUS">GS7()C&'5N<(Z;*9)E
M%H\<)B0 VQ]V.A-R/B4BCR(8!LJ,-RXGE7@6J\V76T@;[(:_I?JJO<#D=K:Z
M68/$:;)ECHC(, V'W=!:Q4GNE%0A=U'*,(J4[S@?!LGL-S#'"SL+/DY0LF3+
M4T3\^G>X66L? PZ6CD"@F "V/V(5Q7YHL!\:RE&Q*9Z!?>%V&!.SW[\<(^8S
MTW",_2YT/>]5:3=K"89#WFV]1QUP5,3QT5"INRF3"$P)+_6XI^4/W VK_HPW
M*)\NWF15?[%Z)-X9GCC:N_NB>^G^+?)H[Q]02P,$%     @ HUN&5=>Q-N;$
M!P  @Q<  !P   !I<V)A7S(P,C)Q-'AD:79A;FYX97@Y.3$N:'1MU5AK;]O&
M$OU^?\74;I(6D*BG;<EV#=BRT[J('[55Y-Y/%TMR)6Y-<M7=I63EU_?,+J7X
MF;A TZ8!8LLB=^;,S)DS0^Y_<WPQ&O_O\H0R5^1T^>O1N],1;31;K?>]4:MU
M/#ZFG\9G[Z@?M3LT-J*TRBE=BKS5.CG?H(W,N=ENJ[58+*)%+])FVAI?M=A4
MOY5K;664NG3C8)^_P4\ITH/_['_3;-*Q3JI"EHX2(X63*556E5-ZGTI[0\UF
M?==(SY9&33-'W7:W2^^UN5%S$:X[Y7)YL+*SWPI_[[>\D_U8I\N#_53-2:4_
M;*CVUG;:CH5(X]Y6/QYT!F)K9S)HI\,A+HANY_\=@&SA]G#&NF4N?]@H5-G,
M)/O?[7>CG:V9VUNHU&6[G7;[U8:_]6!_HDL'?P;GP\=@YI$Q)V]=4^1J6N[Z
MD#;"T=7E1.?:[&ZV_;\]OM*<B$+ER]TW8U5(2^=R05>Z$.6;AD49FE8:-0DW
M6O5! A/@^3\7 ?(.[.2JE*L0.ET&?7*;J5@Y&@ZCSGW$ZVA> &F$0&*CGH/2
M?1&4M]K0:5'(5($!="5S*:S\VS#UG\1T:D4L\US0D2AOP#\STT8PX_]A7'VT
MWWE$9T*5=.V,E.X1H#5KA9F"N+%V3A>[O=F?8-I? O7,173)M12E:]#9*?4'
M@ZW!,_E[HG.>#67["X;R#$,OKNCLXNJ$3L_Q\>QP?'IQWJ#1Q?GX<#1^O;DU
MV/MJJS VRF8TUD7R0=PTZ%@9F3@TG)Z 1.9&.LCM5Y#WI\%?9KJ4/K]$P\&P
MN;,S;&[W>CVBM^(V?!^^WFIN;;6_G([U/\>2G?ZG-(-.2QYO%NK]5E?&9?1+
M)8R3)HRS8S57J2S3%Y9A"#!WALAOE75JLOS+*M/Y7&5\K ^:6R69FHH2_)*)
M+&)I7F]VMMM[VXT089.>S\UW%^/1+__UQ3R]/CK\GIQ.Q9)$6>JJ3+ 1*&?I
M2 N3,F=7_+64RB07!M<%37Q2F[_724T$&)_62>5#W[:C[H!F?$D7!7S:#"=)
M.&_;R&D%2U1(WPR$Z^=Z?B>*7CN$$=$XD[6QM7DC9T9:;!X60' -^HSNZD4[
MKTC55:>)T04YG'690A@KG&L; O]1D7)J:2F%:3K=3'D4KFZPR E]VXG:PX@\
MAO7)A<ISBB7-Q%+$N7R0_DZ=_P:?]S%G.D\EDH>D((\:8(3_X\&Y_BK@(\!/
M.2-<FM>;@VYG9\]2DFN_I5FGDQN:&95(GV:<V&G[/-<)]K:?3F;#)P15KD#'
M#W!ROVI+)7.4WF+A'/9>1?^FUN T==M[XPSHU_&LN6#D) >#K0]?EU/M$UDE
MB;0^6_<:Y8T%:/2)G*H$)K!RHV?FTC9>;_;Z>V2%2NEG(>DPHI,Y(#?H$F1D
MC\Z3:I0I.:&36YE4?(XN)A/4RH!%WH"'.!'<3PVT1C7+)5,*^H2&8L_ 1Q-5
MBC)1(@=T6^5 /@'!&?U$&>OP"5O(BM,^!,=FF<@-8A8@C7,.DBETGX7R-I&S
M\!B1+VF!L"./Z^NL]M.B?QCKROET?&I)_"H">)JN+U)F"M*L FUGJ"$ <AFY
ML!#5F2B7C]B+\B,(%K(D\^S@+H< 5R#RDF)VQP]I-758Z4MZ>JY$#^;' LHB
M83K.L=R$@YUAN^<YG^%:+&7I72G'SY2L?C4)&7ZN$["9_?,WI92IIRW/@@0E
MT 5SDTVMP"H92-_I##VO;9@$'HJ>3/AVB)YE'J_/2>-[)D?SLQ?^.I4SZ*:#
M8.JT@@0T6""9]?Q;E>AKQX^P4$8#&/Z(#/F;Y1!*+Q0<!J2"NTY7T^QC7MY+
MD;OL#C#. T?*I5S?SURU<H[LG*FTN4HO]W[)489:CWBN-NA'3P/ 6?E /3 S
M@(@+DP)2B@_@%[)9-#S<:P%VB\6_2J[YZ;/0T"E5HL9%H+[P7?UL:S1HKKB2
MS*937SBFX*](N,*-V"OX/8BJ3S/1(E#B(8GOMMIJ+_$#%5WV>Z5=&+SLPO<A
MH4 FR*O_IE[?+>H$Y6[PCAFM)[3D&0/YQMA@4\&)75HG"_J.P6F7%.$\0_N>
MJA**[$W;91'KG.HIQGWOS78[>YY;=U!C.@4;^'6#TXKW-!F("AT'DZY!/[3V
M5.LT  S.X_HN#,7@G;G#[1>:  4Q,J^)BR%3L.4K6;(S>KL>1Z/0G37#[]HW
MX=[UY/).7DK*/_64\[)7,H.7O@998,MMOM/:"],UMSX+@GT6^9=KGH>0G^X=
MOT#P_LM;M']MPXM.7J5!,'TX>1V.78<#D=*>:D#/<\1E(K02CLBP$-WM16Q,
MK+ 0\<*SR88#!1X2=))@45&A2R:5JUBW9@$(MF*QX/W#WXT-*_L$)&\M5:SE
M[ 7)\"N)7]RQ'U4?MY^(#M.T?O=Y#V:B\;1B@DICA*PZ-:Q7-6;H;,Z;;@5\
M=]P$QYR*U8JE["J1Z2H\BX[V'8'[^!5G&G:X*V71%,%)V JYF?RGFE#TF%#U
M^HC.!7ZL>W#QK#:]X1[,_<.)7PT9RS462A/F(GL[N<6 +Z?2MZ2RUBOD(L-T
M\0N@F N5^\>3]8/0YPW [66%^9Z@\WUR$I]+(%F?\M98-A8RAAK+E? B4]%4
MSY]O^ ?O<OU4ALO=H#IS^>CM[NI@+1'MCT=$;'5>N<='/O-"N/X97D_[%^4'
M?P!02P$"% ,4    " "C6X95<J/R?]85   \J   $0              @ $
M    :7-B82TR,#(R,3(P-BYH=&U02P$"% ,4    " "C6X95CA4%Y6L"  !Z
M!P  $0              @ $%%@  :7-B82TR,#(R,3(P-BYX<V102P$"% ,4
M    " "C6X95@BDE[4$)  !'4@  %0              @ &?&   :7-B82TR
M,#(R,3(P-E]L86(N>&UL4$L! A0#%     @ HUN&5; 02\X5!@  Y"H  !4
M             ( !$R(  &ES8F$M,C R,C$R,#9?<')E+GAM;%!+ 0(4 Q0
M   ( *-;AE77L3;FQ <  (,7   <              "  5LH  !I<V)A7S(P
K,C)Q-'AD:79A;FYX97@Y.3$N:'1M4$L%!@     %  4 3@$  %DP      $!

end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
