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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						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
After-tax
Other comprehensive income (loss)	$ (11,258)	$ (5,866)	$ 13,791	$ (27,531)	$ (29,656)	$ (42,910)	$ (3,333)	$ (100,097)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent
Pre-tax
Unrealized holding gains (losses) arising during the period	(14,942)			(36,715)			(5,151)	(134,148)
Less: Reclassification adjustments for (gains) losses realized in net income (loss)	10			210			732	1,423
Other comprehensive income (loss)	(14,932)			(36,505)			(4,419)	(132,725)
Tax
Unrealized holding gains (losses) arising during the period	(3,677)			(9,026)			(1,266)	(32,978)
Less: Reclassification adjustments for (gains) losses realized in net income (loss)	3			52			180	350
Other comprehensive income (loss)	(3,674)			(8,974)			(1,086)	(32,628)
After-tax
Unrealized holding gains (losses) arising during the period	(11,265)			(27,689)			(3,885)	(101,170)
Less: Reclassification adjustments for (gains) losses realized in net income (loss)	7			158			552	1,073
Other comprehensive income (loss)	$ (11,258)			$ (27,531)			$ (3,333)	$ (100,097)

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