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Loans and the Allowance for Credit Losses (Details) - Allowance for Credit Losses on Financing Receivables - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 78,773	$ 79,226
Day 1 effect of CECL		6,557
Balance as of January 1, 2021 as adjusted for changes in accounting principle		85,783
Charge-offs	(274)
Recoveries	32	61
(Reversal of) provision for credit losses (loans)	1,539	(5,276)
Balance	80,070	80,568
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	25,969	28,443
Day 1 effect of CECL		(4,225)
Balance as of January 1, 2021 as adjusted for changes in accounting principle		24,218
Charge-offs	(49)
Recoveries	1	60
(Reversal of) provision for credit losses (loans)	(462)	2,157
Balance	25,459	26,435
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	45,589	39,330
Day 1 effect of CECL		9,605
Balance as of January 1, 2021 as adjusted for changes in accounting principle		48,935
Charge-offs	(225)
Recoveries
(Reversal of) provision for credit losses (loans)	2,504	(5,038)
Balance	47,868	43,897
Commercial Construction Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	3,580	8,194
Day 1 effect of CECL		(961)
Balance as of January 1, 2021 as adjusted for changes in accounting principle		7,233
Charge-offs
Recoveries
(Reversal of) provision for credit losses (loans)	(299)	(1,712)
Balance	3,281	5,521
Residential Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	3,628	2,687
Day 1 effect of CECL		2,697
Balance as of January 1, 2021 as adjusted for changes in accounting principle		5,384
Charge-offs
Recoveries	31
(Reversal of) provision for credit losses (loans)	(204)	(680)
Balance	3,455	4,704
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	7	4
Day 1 effect of CECL		9
Balance as of January 1, 2021 as adjusted for changes in accounting principle		13
Charge-offs
Recoveries		1
(Reversal of) provision for credit losses (loans)		(3)
Balance	7	11
Unallocated [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		568
Day 1 effect of CECL		(568)
Balance as of January 1, 2021 as adjusted for changes in accounting principle
Charge-offs
Recoveries
(Reversal of) provision for credit losses (loans)
Balance

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Amount of allowance to cover probable credit losses adjustment on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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