Accumulated Other Comprehensive Income (Loss) - Reclassified by component (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
Other interest expense	$ (20,539)			$ (9,589)			$ (37,941)	$ (31,537)
Other operating expense	4,349			6,182			15,171	15,773
Provision for income taxes	8,980			9,399			25,337	22,742
Total before tax	32,422			34,812			92,033	86,452
Net income	23,442	$ 25,035	$ 18,219	25,413	$ 19,258	$ 19,039	66,696	63,710
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Net gain (loss) on sale of securities				(10)				113
Provision for income taxes				3				(35)
Net income				(7)				78
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Provision for income taxes	320			828			1,918	2,458
Net income	(710)			(1,812)			(4,199)	(5,425)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Interest Rate Swap [Member]
Other interest expense	(1,030)			(2,640)			(6,117)	(7,883)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Other operating expense	6			(125)			18	(375)
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			21	63
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Provision for income taxes	(4)			32			1	97
Total before tax	13			(104)			39	(312)
Net income	$ 9			$ (72)			$ 40	$ (215)