Loans (Narrative) (Details) $ in Thousands	3 Months Ended
Mar. 31, 2021 USD ($) contract	Dec. 31, 2020 USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	$ 3,546,723	$ 3,622,119
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	371,195	$ 372,989
Small Business Administration Paycheck Protection Program \| Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	$ 128,000
Financing receivable, number of contracts \| contract	2,800
Small business administration paycheck protection program forgiveness proceeds	$ 65,000

Amount, before allowance for credit loss, of financing receivable.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 55
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
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