    <SEC-DOCUMENT>0001709442-22-000019-index.html : 20220614
    <SEC-HEADER>0001709442-22-000019.hdr.sgml : 20220614
    <ACCEPTANCE-DATETIME>20220614170123
    ACCESSION NUMBER:		0001709442-22-000019
    CONFORMED SUBMISSION TYPE:	8-K/A
    PUBLIC DOCUMENT COUNT:		64
    CONFORMED PERIOD OF REPORT:	20220401
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20220614
    DATE AS OF CHANGE:		20220614

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			FIRSTSUN CAPITAL BANCORP
    		CENTRAL INDEX KEY:			0001709442
    		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
    		IRS NUMBER:				814552413
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K/A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	333-258176
    		FILM NUMBER:		221015593

    	BUSINESS ADDRESS:
    		STREET 1:		1400 16TH STREET
    		CITY:			DENVER
    		STATE:			CO
    		ZIP:			80202
    		BUSINESS PHONE:		785-827-5565

    	MAIL ADDRESS:
    		STREET 1:		1400 16TH STREET
    		CITY:			DENVER
    		STATE:			CO
    		ZIP:			80202
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K/A
    <SEQUENCE>1
    <FILENAME>fcb-20220401.htm
    <DESCRIPTION>8-K/A
    <TEXT>
    Document 1 - file: fcb-20220401.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.1
    <SEQUENCE>2
    <FILENAME>exhibit231consentofcrowell.htm
    <DESCRIPTION>EX-23.1
    <TEXT>
    Document 2 - file: exhibit231consentofcrowell.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>3
    <FILENAME>exhibit991pioneeraudited.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 3 - file: exhibit991pioneeraudited.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>4
    <FILENAME>exhibit992unauditedproform.htm
    <DESCRIPTION>EX-99.2
    <TEXT>
    Document 4 - file: exhibit992unauditedproform.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>5
    <FILENAME>fcb-20220401.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 5 - file: fcb-20220401.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>6
    <FILENAME>fcb-20220401_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 6 - file: fcb-20220401_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>7
    <FILENAME>fcb-20220401_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 7 - file: fcb-20220401_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>exhibit991pioneeraudited001.jpg
    <TEXT>
    Document 8 - file: exhibit991pioneeraudited001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>exhibit991pioneeraudited002.jpg
    <TEXT>
    Document 9 - file: exhibit991pioneeraudited002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>exhibit991pioneeraudited003.jpg
    <TEXT>
    Document 10 - file: exhibit991pioneeraudited003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>exhibit991pioneeraudited004.jpg
    <TEXT>
    Document 11 - file: exhibit991pioneeraudited004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>exhibit991pioneeraudited005.jpg
    <TEXT>
    Document 12 - file: exhibit991pioneeraudited005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>exhibit991pioneeraudited006.jpg
    <TEXT>
    Document 13 - file: exhibit991pioneeraudited006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>exhibit991pioneeraudited007.jpg
    <TEXT>
    Document 14 - file: exhibit991pioneeraudited007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>exhibit991pioneeraudited008.jpg
    <TEXT>
    Document 15 - file: exhibit991pioneeraudited008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>exhibit991pioneeraudited009.jpg
    <TEXT>
    Document 16 - file: exhibit991pioneeraudited009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>exhibit991pioneeraudited010.jpg
    <TEXT>
    Document 17 - file: exhibit991pioneeraudited010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>exhibit991pioneeraudited011.jpg
    <TEXT>
    Document 18 - file: exhibit991pioneeraudited011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>exhibit991pioneeraudited012.jpg
    <TEXT>
    Document 19 - file: exhibit991pioneeraudited012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>exhibit991pioneeraudited013.jpg
    <TEXT>
    Document 20 - file: exhibit991pioneeraudited013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>exhibit991pioneeraudited014.jpg
    <TEXT>
    Document 21 - file: exhibit991pioneeraudited014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>exhibit991pioneeraudited015.jpg
    <TEXT>
    Document 22 - file: exhibit991pioneeraudited015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>exhibit991pioneeraudited016.jpg
    <TEXT>
    Document 23 - file: exhibit991pioneeraudited016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>exhibit991pioneeraudited017.jpg
    <TEXT>
    Document 24 - file: exhibit991pioneeraudited017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>exhibit991pioneeraudited018.jpg
    <TEXT>
    Document 25 - file: exhibit991pioneeraudited018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>exhibit991pioneeraudited019.jpg
    <TEXT>
    Document 26 - file: exhibit991pioneeraudited019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>exhibit991pioneeraudited020.jpg
    <TEXT>
    Document 27 - file: exhibit991pioneeraudited020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>exhibit991pioneeraudited021.jpg
    <TEXT>
    Document 28 - file: exhibit991pioneeraudited021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>exhibit991pioneeraudited022.jpg
    <TEXT>
    Document 29 - file: exhibit991pioneeraudited022.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>exhibit991pioneeraudited023.jpg
    <TEXT>
    Document 30 - file: exhibit991pioneeraudited023.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>exhibit991pioneeraudited024.jpg
    <TEXT>
    Document 31 - file: exhibit991pioneeraudited024.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>exhibit991pioneeraudited025.jpg
    <TEXT>
    Document 32 - file: exhibit991pioneeraudited025.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>exhibit991pioneeraudited026.jpg
    <TEXT>
    Document 33 - file: exhibit991pioneeraudited026.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>exhibit991pioneeraudited027.jpg
    <TEXT>
    Document 34 - file: exhibit991pioneeraudited027.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>exhibit991pioneeraudited028.jpg
    <TEXT>
    Document 35 - file: exhibit991pioneeraudited028.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>exhibit991pioneeraudited029.jpg
    <TEXT>
    Document 36 - file: exhibit991pioneeraudited029.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>exhibit991pioneeraudited030.jpg
    <TEXT>
    Document 37 - file: exhibit991pioneeraudited030.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>exhibit991pioneeraudited031.jpg
    <TEXT>
    Document 38 - file: exhibit991pioneeraudited031.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>39
    <FILENAME>exhibit991pioneeraudited032.jpg
    <TEXT>
    Document 39 - file: exhibit991pioneeraudited032.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>40
    <FILENAME>exhibit991pioneeraudited033.jpg
    <TEXT>
    Document 40 - file: exhibit991pioneeraudited033.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>41
    <FILENAME>exhibit991pioneeraudited034.jpg
    <TEXT>
    Document 41 - file: exhibit991pioneeraudited034.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>42
    <FILENAME>exhibit991pioneeraudited035.jpg
    <TEXT>
    Document 42 - file: exhibit991pioneeraudited035.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>43
    <FILENAME>exhibit991pioneeraudited036.jpg
    <TEXT>
    Document 43 - file: exhibit991pioneeraudited036.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>44
    <FILENAME>exhibit991pioneeraudited037.jpg
    <TEXT>
    Document 44 - file: exhibit991pioneeraudited037.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>45
    <FILENAME>exhibit991pioneeraudited038.jpg
    <TEXT>
    Document 45 - file: exhibit991pioneeraudited038.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>46
    <FILENAME>exhibit991pioneeraudited039.jpg
    <TEXT>
    Document 46 - file: exhibit991pioneeraudited039.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>47
    <FILENAME>exhibit991pioneeraudited040.jpg
    <TEXT>
    Document 47 - file: exhibit991pioneeraudited040.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>48
    <FILENAME>exhibit991pioneeraudited041.jpg
    <TEXT>
    Document 48 - file: exhibit991pioneeraudited041.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>49
    <FILENAME>exhibit991pioneeraudited042.jpg
    <TEXT>
    Document 49 - file: exhibit991pioneeraudited042.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>50
    <FILENAME>exhibit991pioneeraudited043.jpg
    <TEXT>
    Document 50 - file: exhibit991pioneeraudited043.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>51
    <FILENAME>exhibit991pioneeraudited044.jpg
    <TEXT>
    Document 51 - file: exhibit991pioneeraudited044.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>52
    <FILENAME>exhibit991pioneeraudited045.jpg
    <TEXT>
    Document 52 - file: exhibit991pioneeraudited045.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>53
    <FILENAME>exhibit991pioneeraudited046.jpg
    <TEXT>
    Document 53 - file: exhibit991pioneeraudited046.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>54
    <FILENAME>exhibit991pioneeraudited047.jpg
    <TEXT>
    Document 54 - file: exhibit991pioneeraudited047.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>55
    <FILENAME>exhibit991pioneeraudited048.jpg
    <TEXT>
    Document 55 - file: exhibit991pioneeraudited048.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>56
    <FILENAME>exhibit991pioneeraudited049.jpg
    <TEXT>
    Document 56 - file: exhibit991pioneeraudited049.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>57
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 57 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>58
    <FILENAME>fcb-20220401_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 58 - file: fcb-20220401_htm.html

    Document 58 - RAW XML: fcb-20220401_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>59
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 59 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>60
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 60 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>61
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 61 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>62
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 62 - file: FilingSummary.html

    Document 62 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>64
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 64 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>65
    <FILENAME>0001709442-22-000019-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 65 - file: 0001709442-22-000019-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>