Fair Value Measurements (Financial Assets Measured at Fair Value on Nonrecurring Basis) (Details) - Nonrecurring [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	$ 91,819	$ 182,377
Other real estate owned and foreclosed assets, net	11,219	24,422
Total fair value measurements	103,038	206,799
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	91,819	182,377
Total fair value measurements	91,819	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, net	11,219	24,422
Total fair value measurements	$ 11,219	$ 24,422