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Allowance for Credit Losses (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items] |
Increase in loan provision | $ 39.1
Accounting Standards Update 2019-04 [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Financing Receivable Allowance For Credit Losses Period Increase Decrease | 89.7
Accounting Standards Update 2019-04 [Member] | PCD [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Financing Receivable Allowance For Credit Losses Period Increase Decrease | $ 50.5
Percent of total loan portfolio | 30.00%
Accounting Standards Update 2019-04 [Member] | Non-PCD [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Financing Receivable Allowance For Credit Losses Period Increase Decrease | $ 39.2
Percent of total loan portfolio | 70.00%

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