Allowance for Credit Losses and Credit Quality of Loans, Allowance for Credit Losses by Portfolio Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period	$ 115,300	$ 100,250	$ 114,400
Charge-offs	(5,627)	(5,149)	(12,307)		$ (26,778)
Recoveries	1,928	1,693	3,929
Provision	8,899	3,606	14,478	$ 7,515
Balance, end of period	120,500	100,400	120,500	100,400	114,400
ASU 2022-02 [Member]
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period				100,152	100,152
Charge-offs				(10,999)
Recoveries				3,732
Provision				7,515
Balance, end of period		100,400		100,400
Commercial Loans [Member]
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period	44,472	36,040	45,903
Charge-offs	(299)	(207)	(1,284)
Recoveries	292	97	490
Provision	2,243	1,033	1,599
Balance, end of period	46,708	36,963	46,708	36,963	45,903
Commercial Loans [Member] | ASU 2022-02 [Member]
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period				34,662	34,662
Charge-offs				(376)
Recoveries				638
Provision				2,039
Balance, end of period		36,963		36,963
Consumer Loans [Member]
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period	47,419	48,820	46,427
Charge-offs	(5,328)	(4,837)	(10,909)
Recoveries	1,559	1,441	3,210
Provision	4,268	2,459	9,190
Balance, end of period	47,918	47,883	47,918	47,883	46,427
Consumer Loans [Member] | ASU 2022-02 [Member]
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period				50,951	50,951
Charge-offs				(10,179)
Recoveries				2,818
Provision				4,293
Balance, end of period		47,883		47,883
Residential [Member]
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period	23,409	15,390	22,070
Charge-offs	0	(105)	(114)		(517)
Recoveries	77	155	229
Provision	2,388	114	3,689
Balance, end of period	$ 25,874	15,554	$ 25,874	15,554	22,070
Residential [Member] | ASU 2022-02 [Member]
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period				14,539	$ 14,539
Charge-offs				(444)
Recoveries				276
Provision				1,183
Balance, end of period		$ 15,554		$ 15,554