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Capital Requirements and Regulatory Restrictions (Tables)

12 Months Ended

Dec. 31, 2021

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The Company’s and the Bank’s actual and required capital amounts and ratios are as follows:

			Actual												Capital Requirements												Requirement to be Well-Capitalized
(In thousands)			Amount						Ratio						Amount						Ratio						Amount						Ratio
At December 31, 2021
Total capital (to risk-weighted assets)
Cass Information Systems, Inc.			$	240,265					14.86		%				$	129,339					8.00		%				$        N/A						N/A %
Cass Commercial Bank			174,614						17.21						81,163						8.00						101,454						10.00
Common Equity Tier I Capital (to risk-weighted assets)
Cass Information Systems, Inc.			228,224						14.11						72,764						4.50						N/A						N/A
Cass Commercial Bank			163,030						16.07						45,654						4.50						65,945						6.50
Tier I capital (to risk-weighted assets)
Cass Information Systems, Inc.			228,224						14.11						97,019						6.00						N/A						N/A
Cass Commercial Bank			163,030						16.07						60,872						6.00						81,163						8.00
Tier I capital (to average assets)
Cass Information Systems, Inc.			228,224						9.21						99,163						4.00						N/A						N/A
Cass Commercial Bank			163,030						11.05						59,036						4.00						73,795						5.00
At December 31, 2020
Total capital (to risk-weighted assets)
Cass Information Systems, Inc.			$	255,332					21.41		%				$	95,388					8.00		%				$        N/A						N/A %
Cass Commercial Bank			171,298						21.46						63,855						8.00						79,819						10.00
Common Equity Tier I Capital (to risk-weighted assets)
Cass Information Systems, Inc.			243,388						20.41						53,656						4.50						N/A						N/A
Cass Commercial Bank			161,300						20.21						35,918						4.50						51,882						6.50
Tier I capital (to risk-weighted assets)
Cass Information Systems, Inc.			243,388						20.41						71,541						6.00						N/A						N/A
Cass Commercial Bank			161,300						20.21						47,891						6.00						63,855						8.00
Tier I capital (to average assets)
Cass Information Systems, Inc.			243,388						11.52						84,511						4.00						N/A						N/A
Cass Commercial Bank			161,300						14.48						44,543						4.00						55,679						5.00

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- References

No definition available.

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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://www.xbrl.org/2003/role/disclosureRef
-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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826

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