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Loans and Allowance for Credit Losses on Loans (Activity in Allowance for Loan Losses by Portfolio Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	$ 37,865	$ 25,171	$ 24,712
Loans charged off	(1,164)	(1,838)	(2,713)
Recoveries	372	1,084	310
Provision (credit)	(3,817)	13,215	2,862
Financing Receivable, Allowance for Credit Loss, Ending Balance	33,256	37,865	25,171
Ending Balance: Individually evaluated for impairment			463
Ending Balance: Collectively evaluated for impairment			24,708
Ending Balance: Individually evaluated for impairment			4,478
Ending Balance: Collectively evaluated for impairment			3,090,545
Loans	3,431,474	3,219,822	3,095,023
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance		12,414	11,654
Loans charged off			(300)
Recoveries			49
Provision (credit)			1,011
Financing Receivable, Allowance for Credit Loss, Ending Balance			12,414
Ending Balance: Individually evaluated for impairment			30
Ending Balance: Collectively evaluated for impairment			12,384
Ending Balance: Individually evaluated for impairment			402
Ending Balance: Collectively evaluated for impairment			1,242,995
Loans			1,243,397
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	6,703	3,985	3,957
Loans charged off	(799)	(1,130)	(1,238)
Recoveries	220	572	225
Provision (credit)	(1,941)	1,728	1,041
Financing Receivable, Allowance for Credit Loss, Ending Balance	4,183	6,703	3,985
Ending Balance: Individually evaluated for impairment			0
Ending Balance: Collectively evaluated for impairment			3,985
Ending Balance: Individually evaluated for impairment			319
Ending Balance: Collectively evaluated for impairment			442,382
Loans	363,695	381,494	442,701
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	3,474	5,842	6,071
Loans charged off	(92)	(121)	(462)
Recoveries	107	292	16
Provision (credit)	2,644	(1,410)	217
Financing Receivable, Allowance for Credit Loss, Ending Balance	6,133	3,474	5,842
Ending Balance: Individually evaluated for impairment			364
Ending Balance: Collectively evaluated for impairment			5,478
Ending Balance: Individually evaluated for impairment			3,384
Ending Balance: Collectively evaluated for impairment			1,066,990
Loans	1,306,447	1,054,798	1,070,374
Home equity
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	2,616	2,423	2,796
Loans charged off	(162)	(317)	(412)
Recoveries	4	33	1
Provision (credit)	(989)	(315)	38
Financing Receivable, Allowance for Credit Loss, Ending Balance	1,469	2,616	2,423
Ending Balance: Individually evaluated for impairment			69
Ending Balance: Collectively evaluated for impairment			2,354
Ending Balance: Individually evaluated for impairment			373
Ending Balance: Collectively evaluated for impairment			312,406
Loans	210,403	258,573	312,779
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	393	507	234
Loans charged off	(111)	(167)	(301)
Recoveries	32	67	19
Provision (credit)	(235)	206	555
Financing Receivable, Allowance for Credit Loss, Ending Balance	79	393	507
Ending Balance: Individually evaluated for impairment			0
Ending Balance: Collectively evaluated for impairment			507
Ending Balance: Individually evaluated for impairment			0
Ending Balance: Collectively evaluated for impairment			25,772
Loans	$ 19,516	$ 20,392	$ 25,772

X

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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