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Fair Value Measurements (Financial Assets Measured at Fair Value on Nonrecurring Basis) (Details) - Fair Value, Nonrecurring - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral dependent loans individually evaluated for credit loss | $ 60,451 |
Collateral dependent impaired loans |  | $ 182,377
Other real estate owned and foreclosed assets | 11,648 | 24,422
Total fair value measurements | 72,099 | 206,799
Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral dependent loans individually evaluated for credit loss | 60,451 |
Collateral dependent impaired loans |  | 182,377
Total fair value measurements | 60,451 | 182,377
Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other real estate owned and foreclosed assets | 11,648 | 24,422
Total fair value measurements | $ 11,648 | $ 24,422

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