Accumulated Other Comprehensive Income (Loss) Reclassified by Component (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
Interest and dividend income	$ 104,036			$ 81,745			$ 292,714	$ 227,356
Interest (expense)	(59,609)			(20,539)			(159,647)	(37,941)
Other operating expense	6,176			4,349			18,176	15,171
Provision for income taxes	2,917			8,980			7,514	25,337
Total before tax	10,752			32,422			28,079	92,033
Net Income (Loss)	7,835	$ 8,686	$ 4,044	23,442	$ 25,035	$ 18,219	20,565	66,696
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Interest Rate Swap [Member]
Interest (expense)								(6,117)
Provision for income taxes								1,918
Net Income (Loss)								(4,199)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Interest (expense)	7,053			(1,030)			18,222
Provision for income taxes	(2,185)			320			(5,645)
Net Income (Loss)	4,868			(710)			12,577
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Other operating expense	100			6			300	18
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Other operating expense				7				21
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Provision for income taxes	(31)			(4)			(93)
Total before tax				13				39
Tax expense (benefit)								1
Net Income (Loss)	69			$ 9			207	$ 40
Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI Attributable to Parent [Member] | Interest Rate Swap [Member] | Fair Value Hedging [Member]
Interest and dividend income	(2,217)						(7,721)
Provision for income taxes	687						2,392
Net Income (Loss)	$ (1,530)						$ (5,329)