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Loans and the Allowance for Loan Losses (Details) - Loans receivable on nonaccrual status - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Loans and the Allowance for Loan and Lease Losses (Details) - Loans receivable on nonaccrual status [Line Items] |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | $ 65,494 | $ 49,481
Commercial Portfolio Segment [Member] |  |
Loans and the Allowance for Loan and Lease Losses (Details) - Loans receivable on nonaccrual status [Line Items] |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 33,108 | 31,455
Commercial Real Estate Portfolio Segment [Member] |  |
Loans and the Allowance for Loan and Lease Losses (Details) - Loans receivable on nonaccrual status [Line Items] |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 9,378 | 8,338
Commercial Construction Portfolio Segment [Member] |  |
Loans and the Allowance for Loan and Lease Losses (Details) - Loans receivable on nonaccrual status [Line Items] |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 17,727 | 6,773
Residential Real Estate Portfolio Segment [Member] |  |
Loans and the Allowance for Loan and Lease Losses (Details) - Loans receivable on nonaccrual status [Line Items] |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | $ 5,281 | $ 2,915

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