Changes in Accumulated Other Comprehensive Income by Component - Reclassification Adjustments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Losses) gains from the sale of available-for-sale securities		$ (5,427)	$ 9,439	$ 13,352
Tax (expense) benefit		(10,452)	(15,960)	(30,504)
Net income for the period	[1]	34,630	45,863	98,682
Amounts Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income for the period		(28)	41	(87)
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		(37)	55	(114)
Tax (expense) benefit		$ 9	$ (14)	$ 27

[1] See Note 8 — Allowance for Doubtful Accounts herein regarding the adopted credit-loss guidance.