Loans (Narrative) (Details) $ in Thousands	6 Months Ended
Jun. 30, 2021 USD ($) contract	Dec. 31, 2020 USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	$ 3,529,416	$ 3,622,119
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	358,583	$ 372,989
Small Business Administration Paycheck Protection Program \| Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	$ 136,000
Financing receivable, number of contracts \| contract	2,500
Small business administration paycheck protection program forgiveness proceeds	$ 86,000

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

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