Loans and Allowance for Credit Losses - Allowance for Credit Loss Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 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	1,090	(698)
Charge-offs	(4,459)	(982)
Recoveries	9,574	3,019
Net Recoveries/(Charge-offs)	(5,115)	(2,037)
Balance at End of Period	108,113	99,915
Impact of adopting ASU 2022-02
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning 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	(1,011)	(1,996)
Charge-offs	0	0
Recoveries	9	199
Net Recoveries/(Charge-offs)	(9)	(199)
Balance at End of Period	40,426	48,903
Commercial Loans | Commercial real estate | Impact of adopting ASU 2022-02
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning 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	(476)	(206)
Charge-offs	(3,412)	0
Recoveries	9,400	2,716
Net Recoveries/(Charge-offs)	(5,988)	(2,716)
Balance at End of Period	31,297	22,237
Commercial Loans | Commercial and industrial | Impact of adopting ASU 2022-02
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning 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	412	(27)
Charge-offs	0	0
Recoveries	2	1
Net Recoveries/(Charge-offs)	(2)	(1)
Balance at End of Period	6,893	5,329
Commercial Loans | Commercial construction | Impact of adopting ASU 2022-02
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning 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	1,497	765
Charge-offs	(652)	(606)
Recoveries	37	0
Net Recoveries/(Charge-offs)	615	606
Balance at End of Period	13,680	11,497
Commercial Loans | Business banking | Impact of adopting ASU 2022-02
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning 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	488	426
Charge-offs	(77)	(78)
Recoveries	61	37
Net Recoveries/(Charge-offs)	16	41
Balance at End of Period	12,855	9,118
Consumer Loans | Consumer real estate | Impact of adopting ASU 2022-02
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning 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	180	340
Charge-offs	(318)	(298)
Recoveries	65	66
Net Recoveries/(Charge-offs)	253	232
Balance at End of Period	2,962	$ 2,831
Consumer Loans | Other consumer | Impact of adopting ASU 2022-02
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ (251)