Loans and Allowance for Credit Losses - Allowance for Credit Loss Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 101,340	$ 98,576
Provision for credit losses on loans	19,240	5,359
Charge-offs	(24,638)	(11,617)
Recoveries	11,456	9,022
Net (Charge-offs)/Recoveries	(13,182)	(2,595)
Balance at End of Period	107,966	101,340
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	568
Balance at End of Period		568
Commercial Loans | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	41,428	50,700
Provision for credit losses on loans	(2,803)	(9,064)
Charge-offs	(1,706)	(827)
Recoveries	967	619
Net (Charge-offs)/Recoveries	(739)	(208)
Balance at End of Period	37,886	41,428
Commercial Loans | Commercial real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	0
Balance at End of Period		0
Commercial Loans | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	25,710	19,727
Provision for credit losses on loans	18,366	4,797
Charge-offs	(19,254)	(5,797)
Recoveries	9,641	6,983
Net (Charge-offs)/Recoveries	(9,613)	1,186
Balance at End of Period	34,538	25,710
Commercial Loans | Commercial and industrial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	75
Balance at End of Period		75
Commercial Loans | Commercial construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	6,264	5,355
Provision for credit losses on loans	(648)	908
Charge-offs	(451)	0
Recoveries	2	1
Net (Charge-offs)/Recoveries	(449)	1
Balance at End of Period	5,382	6,264
Commercial Loans | Commercial construction | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	215
Balance at End of Period		215
Commercial Loans | Business banking
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	12,547	11,338
Provision for credit losses on loans	1,088	3,644
Charge-offs	(1,306)	(3,314)
Recoveries	278	879
Net (Charge-offs)/Recoveries	(1,028)	(2,435)
Balance at End of Period	12,858	12,547
Commercial Loans | Business banking | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	251
Balance at End of Period		251
Consumer Loans | Consumer real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	12,105	8,733
Provision for credit losses on loans	2,493	3,536
Charge-offs	(421)	(304)
Recoveries	208	140
Net (Charge-offs)/Recoveries	(213)	(164)
Balance at End of Period	14,663	12,105
Consumer Loans | Consumer real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	278
Balance at End of Period		278
Consumer Loans | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	3,286	2,723
Provision for credit losses on loans	744	1,538
Charge-offs	(1,500)	(1,375)
Recoveries	360	400
Net (Charge-offs)/Recoveries	(1,140)	(975)
Balance at End of Period	2,639	3,286
Consumer Loans | Other consumer | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ (251)
Balance at End of Period		$ (251)