Loans and Allowance for Credit Losses Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	$ 249,001	$ 277,567	$ 163,620
Loans charged off	21,472	30,952
Recoveries of loans previously charged off	14,092	17,146
Net loans recovered (charged off)			$ (9,537)
Loans - Excluding OBS Credit Exposure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		277,567
Beginning balance	249,001
Loans charged off	21,472	30,952
Recoveries of loans previously charged off	14,092	17,146
Net loans recovered (charged off)	(7,380)	(13,806)
Provision for credit losses	18,656	(14,760)
Ending balance	269,366	249,001
Financing Receivable, Provision Expense	7,954
Allowance for credit losses at acquisition	1,135
Real estate - commercial mortgage | Loans - Excluding OBS Credit Exposure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		103,425
Beginning balance	87,970
Loans charged off	12,473	8,726
Recoveries of loans previously charged off	3,860	2,474
Net loans recovered (charged off)	(8,613)	(6,252)
Provision for credit losses	(15,059)	(9,203)
Ending balance	69,456	87,970
Financing Receivable, Provision Expense	4,107
Allowance for credit losses at acquisition	1,051
Commercial and industrial | Loans - Excluding OBS Credit Exposure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		74,771
Beginning balance	67,056
Loans charged off	2,390	15,337
Recoveries of loans previously charged off	5,893	9,587
Net loans recovered (charged off)	3,503	(5,750)
Provision for credit losses	(443)	(1,965)
Ending balance	70,116	67,056
Financing Receivable, Provision Expense	0
Allowance for credit losses at acquisition	0
Real estate - home equity | Loans - Excluding OBS Credit Exposure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		25,137
Beginning balance	19,749
Loans charged off	4,412	3,309
Recoveries of loans previously charged off	2,581	2,345
Net loans recovered (charged off)	(1,831)	(964)
Provision for credit losses	8,373	(4,424)
Ending balance	26,429	19,749
Financing Receivable, Provision Expense	131
Allowance for credit losses at acquisition	7
Real estate - residential mortgage | Loans - Excluding OBS Credit Exposure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		51,995
Beginning balance	54,236
Loans charged off	66	1,290
Recoveries of loans previously charged off	425	375
Net loans recovered (charged off)	359	(915)
Provision for credit losses	24,862	3,156
Ending balance	83,250	54,236
Financing Receivable, Provision Expense	3,716
Allowance for credit losses at acquisition	77
Real-estate - construction | Loans - Excluding OBS Credit Exposure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		15,608
Beginning balance	12,941
Loans charged off	0	39
Recoveries of loans previously charged off	574	1,412
Net loans recovered (charged off)	574	1,373
Provision for credit losses	(2,772)	(4,040)
Ending balance	10,743	12,941
Financing Receivable, Provision Expense	0
Allowance for credit losses at acquisition	0
Equipment Finance Leasing and Other | Loans - Excluding OBS Credit Exposure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		6,631
Beginning balance	7,049
Loans charged off	2,131	2,251
Recoveries of loans previously charged off	759	953
Net loans recovered (charged off)	(1,372)	(1,298)
Provision for credit losses	3,695	1,716
Ending balance	9,372	$ 7,049
Financing Receivable, Provision Expense	0
Allowance for credit losses at acquisition	$ 0