Fair Value - Level 3 Assets (Details) - Level 3 - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	$ 26,224	$ 11,645
Included in earnings	(351)	(53)
Included in other comprehensive income	(783)	712
Purchases	13,489	22,831
Sales	(11,120)	(5,278)
Transfers into Level 3	31,098	61,613
Transfers out of Level 3	(26,676)	(65,246)
Ending balance	31,881	26,224
Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	26,224	11,645
Included in earnings	(346)	(204)
Included in other comprehensive income	(783)	712
Purchases	12,489	19,995
Sales	(11,120)	(5,278)
Transfers into Level 3	28,915	61,613
Transfers out of Level 3	(25,581)	(62,259)
Ending balance	29,798	26,224
Corporate debt securities \| Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	5,825	8,324
Included in earnings	34	(2)
Included in other comprehensive income	68	(156)
Purchases	5,502	7,180
Sales	(2,681)	(1,405)
Transfers into Level 3	4,290	10,526
Transfers out of Level 3	(7,782)	(18,642)
Ending balance	5,256	5,825
Collateralized debt obligations \| Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	0	0
Included in earnings	0	0
Included in other comprehensive income	0	3
Purchases	750	247
Sales	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	(750)	(250)
Ending balance	0	0
Commercial mortgage-backed securities \| Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	19,462	3,321
Included in earnings	(375)	(183)
Included in other comprehensive income	(782)	913
Purchases	3,073	12,281
Sales	(5,378)	(2,334)
Transfers into Level 3	11,933	39,591
Transfers out of Level 3	(12,205)	(34,127)
Ending balance	15,728	19,462
Residential mortgage-backed securities \| Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	937	0
Included in earnings	(5)	(19)
Included in other comprehensive income	(69)	(48)
Purchases	576	287
Sales	(2,229)	(1,539)
Transfers into Level 3	12,692	11,496
Transfers out of Level 3	(3,088)	(9,240)
Ending balance	8,814	937
Other debt securities \| Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	0
Included in earnings	0
Included in other comprehensive income	0
Purchases	2,588
Sales	(832)
Transfers into Level 3	0
Transfers out of Level 3	(1,756)
Ending balance	0	0
Equity securities \| Equity securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	0	0
Included in earnings	(5)	151
Included in other comprehensive income	0	0
Purchases	1,000	2,836
Sales	0	0
Transfers into Level 3	2,183	0
Transfers out of Level 3	(1,095)	(2,987)
Ending balance	$ 2,083	$ 0

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
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- Definition

Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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-Publisher FASB
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-Topic 820
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Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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- Definition

Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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- Definition

Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

+ References

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-Name Accounting Standards Codification
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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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