Changes in Accumulated Other Comprehensive Income by Component - Reclassification Adjustments (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
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Losses from the sale of available-for-sale securities	$ 3,551		$ (7,511)		$ 6,653	$ (9,034)
Tax benefit	(2,812)		(1,430)		(7,684)	(5,882)
Net income for the period	8,598	$ 12,684	6,820	$ 11,329	21,282	18,149
Amounts Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income for the period			(11)		(3)	(20)
Losses from the sale of available-for-sale securities | Amounts Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Losses from the sale of available-for-sale securities	(2)		(14)		(4)	(26)
Tax benefit	1		$ 3		$ 1	$ 6
Net income for the period	$ (1)