Securities Available for Sale - Securities Purchased with Credit Deterioration (Details) - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Purchase price of PCD securities at acquisition		$ 27,034,000
Credit valuation allowance on PCD securities at acquisition		15,354,000
Par value of acquired PCD securities at acquisition	$ 0	$ 42,388,000

Amount of allowance for credit loss at acquisition date of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), purchased with credit deterioration.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 10
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922903-210455

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount at par value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 10
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922903-210455

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Period Type:	duration

- Definition

Amount at purchase price of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922903-210455

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- References

No definition available.

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