Fair Value - Level 3 Assets (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	$ 22,559	$ 31,881
Included in earnings	(262)	(144)
Included in other comprehensive income	398	(1,230)
Purchases	2,300	3,984
Sales	(732)	(3,763)
Transfers into Level 3	1,668	5,009
Transfers out of Level 3	(10,281)	(11,984)
Ending balance	15,650	23,753
Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	18,780	29,798
Included in earnings	(224)	(78)
Included in other comprehensive income	398	(1,230)
Purchases	1,342	3,984
Sales	(732)	(3,763)
Transfers into Level 3	1,668	5,009
Transfers out of Level 3	(10,281)	(11,984)
Ending balance	10,951	21,736
Corporate debt securities \| Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	3,686	5,256
Included in earnings	(28)	13
Included in other comprehensive income	85	(55)
Purchases	753	3,984
Sales	(645)	(508)
Transfers into Level 3	1,498	3,549
Transfers out of Level 3	(846)	(1,312)
Ending balance	4,503	10,927
Commercial mortgage-backed securities \| Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	10,910	15,728
Included in earnings	(191)	(116)
Included in other comprehensive income	217	(839)
Purchases	589	0
Sales	0	(500)
Transfers into Level 3	137	1,460
Transfers out of Level 3	(5,247)	(5,136)
Ending balance	6,415	10,597
Residential mortgage-backed securities \| Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	4,184	8,814
Included in earnings	(5)	25
Included in other comprehensive income	96	(336)
Purchases	0	0
Sales	(87)	(2,755)
Transfers into Level 3	33	0
Transfers out of Level 3	(4,188)	(5,536)
Ending balance	33	212
Equity securities \| Equity securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	3,779	2,083
Included in earnings	(38)	(66)
Included in other comprehensive income	0	0
Purchases	958	0
Sales	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Ending balance	$ 4,699	$ 2,017

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
-Paragraph 2
-Subparagraph (c)(1)
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- Definition

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
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1a)
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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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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 https://asc.fasb.org/extlink&oid=126976982&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

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 https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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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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-Publisher FASB
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-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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