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Minimum Regulatory Capital Requirements (Tables)

12 Months Ended

Dec. 31, 2020

Banking and Thrift [Abstract]

Summary of compliance with regulatory capital requirements

Our actual capital amounts and ratios are also presented in the table.

			Actual												Minimum Capital Requirement												Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions
			Amount						Ratio						Amount						Ratio						Amount						Ratio
December 31, 2020
Common equity Tier 1 capital to risk weighted assets
Isabella Bank			$	153,102					12.28		%				$	87,273					7.000		%				$	81,039					6.50		%
Consolidated			162,532						12.97		%				87,675						7.000		%				N/A						N/A
Tier 1 capital to risk weighted assets
Isabella Bank			153,102						12.28		%				105,975						8.500		%				99,741						8.00		%
Consolidated			162,532						12.97		%				106,462						8.500		%				N/A						N/A
Total capital to risk weighted assets
Isabella Bank			162,846						13.06		%				130,910						10.500		%				124,676						10.00		%
Consolidated			172,276						13.75		%				131,512						10.500		%				N/A						N/A
Tier 1 capital to average assets
Isabella Bank			153,102						7.97		%				76,814						4.00		%				96,018						5.00		%
Consolidated			162,532						8.37		%				77,671						4.00		%				N/A						N/A

			Actual												Minimum Capital Requirement												Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions
			Amount						Ratio						Amount						Ratio						Amount						Ratio
December 31, 2019
Common equity Tier 1 capital to risk weighted assets
Isabella Bank			$	150,093					11.86		%				$	88,587					7.000		%				$	82,260					6.50		%
Consolidated			159,794						12.56		%				89,090						7.000		%				N/A						N/A
Tier 1 capital to risk weighted assets
Isabella Bank			150,093						11.86		%				107,570						8.500		%				101,243						8.00		%
Consolidated			159,794						12.56		%				108,180						8.500		%				N/A						N/A
Total capital to risk weighted assets
Isabella Bank			158,032						12.49		%				132,881						10.500		%				126,554						10.00		%
Consolidated			167,733						13.18		%				133,635						10.500		%				N/A						N/A
Tier 1 capital to average assets
Isabella Bank			150,093						8.54		%				70,288						4.000		%				87,861						5.00		%
Consolidated			159,794						9.01		%				70,945						4.000		%				N/A						N/A

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- References

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- Definition

Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1G
-URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958577-112826

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 505
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-URI http://asc.fasb.org/extlink&oid=117337116&loc=d3e65071-112826

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826

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