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Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (loss) Pre-Tax and After-Tax (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
After-tax
Other comprehensive income (loss)	$ (5,866)	$ 13,791	$ (29,656)	$ (42,910)	$ 7,925	$ (72,566)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent
Pre-tax
Unrealized holding gains (losses) arising during the period	(7,803)		(40,272)		9,790	(97,433)
Less: Reclassification adjustments for (gains) losses realized in net income (loss)	21		949		722	1,213
Other comprehensive income (loss)	(7,782)		(39,323)		10,512	(96,220)
Tax
Unrealized holding gains (losses) arising during the period	(1,920)		(9,900)		2,410	(23,952)
Less: Reclassification adjustments for (gains) losses realized in net income (loss)	4		233		177	298
Other comprehensive income (loss)	(1,916)		(9,667)		2,587	(23,654)
After-tax
Unrealized holding gains (losses) arising during the period	(5,883)		(30,372)		7,380	(73,481)
Less: Reclassification adjustments for (gains) losses realized in net income (loss)	17		716		545	915
Other comprehensive income (loss)	$ (5,866)		$ (29,656)		$ 7,925	$ (72,566)

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