Changes in Accumulated Other Comprehensive Income by Component - Reclassification Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit (expense)	$ (671)			$ (2,581)			$ (6,553)	$ (16,378)
Net income	322	$ 6,820	$ 11,329	9,540	$ 9,565	$ 24,653	18,471	43,758
Realized Gains (Losses) on Sale of Available-for-sale Securities | Amounts Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Losses) gains from the sale of available-for-sale securities	(5)			(7)			(31)	221
Tax benefit (expense)	2			5			8	(60)
Net income	$ (3)			$ (2)			$ (23)	$ 161