Other Comprehensive Income (Loss) - Tax effects of components in other comprehensive income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Before Tax
Other comprehensive income (loss)	$ (185,367)	$ 24,411	$ (1,122)
Tax Effect
Other comprehensive income (loss)	51,990	(705)	232
After Tax
Total other comprehensive income (loss)	(133,377)	23,706	(890)
Unrealized (Losses) on Debt Securities Available for Sale
Before Tax
Other comprehensive income (loss), before reclassifications	(190,682)	(39,000)	26,876
Other comprehensive income (loss)	(190,503)	(37,003)	27,406
Tax Effect
Other comprehensive income (loss), before reclassifications	53,427	8,021	(5,640)
Other comprehensive income (loss)	53,377	7,619	(5,755)
After Tax
Other comprehensive income (loss), before reclassifications	(137,255)	(30,979)	21,236
Total other comprehensive income (loss)	(137,126)	(29,384)	21,651
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Accretion Of Unrealized Gains (Losses), Parent
Before Tax
Reclassification from AOCI, current period	(31)	(28)	160
Tax Effect
Reclassification from AOCI, current period	9	25	(34)
After Tax
Reclassification from AOCI, current period	(22)	(3)	126
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Other Reclassifications, Parent
Before Tax
Reclassification from AOCI, current period	210	2,025	370
Tax Effect
Reclassification from AOCI, current period	(59)	(427)	(81)
After Tax
Reclassification from AOCI, current period	151	1,598	289
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Before Tax
Other comprehensive income (loss), before reclassifications	7,524	14,514	(10,605)
Tax Effect
Other comprehensive income (loss), before reclassifications	(2,103)	(2,575)	2,223
After Tax
Other comprehensive income (loss), before reclassifications	5,421	11,939	(8,382)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent
Before Tax
Reclassification from AOCI, current period	(56)	(55)	(56)
Tax Effect
Reclassification from AOCI, current period	15	16	12
After Tax
Reclassification from AOCI, current period	(41)	(39)	(44)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Before Tax
Reclassification from AOCI, current period	(2,677)	(4,044)	(4,284)
Tax Effect
Reclassification from AOCI, current period	749	1,129	900
After Tax
Reclassification from AOCI, current period	(1,928)	(2,915)	(3,384)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Before Tax
Other comprehensive income (loss), before reclassifications	345	50,999	(13,583)
Other comprehensive income (loss)	(2,388)	46,900	(17,923)
Tax Effect
Other comprehensive income (loss), before reclassifications	(48)	(6,894)	2,852
Other comprehensive income (loss)	716	(5,749)	3,764
After Tax
Other comprehensive income (loss), before reclassifications	297	44,105	(10,731)
Total other comprehensive income (loss)	$ (1,672)	$ 41,151	$ (14,159)