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Derivative Financial Instruments (Location and Fair Value of Derivative Instruments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Derivatives not designated as hedging instruments, fair value |  |
Fair value of asset derivatives | $ 26,104 | $ 49,377
Fair value of liability derivatives | 26,104 | 49,377
Effective portion of interest rate cash flow hedge, fair value included in accumulated other comprehensive income | 3,461 | 5,550
Interest Rate Cash Flow Hedge Liability at Fair Value | $ 3,461 | $ 5,550
Other Assets |  |
Derivatives not designated as hedging instruments, fair value |  |
Description of location of interest rate derivative instruments not designated as hedging instruments on balance sheet | Derivatives | Derivatives
Other Liabilities |  |
Derivatives not designated as hedging instruments, fair value |  |
Description of location of interest rate derivative instruments not designated as hedging instruments on balance sheet | Derivatives | Derivatives
Description of location of interest rate derivatives designated as hedging instruments on the balance sheet | Derivatives | Derivatives
Accumulated other comprehensive income |  |
Derivatives not designated as hedging instruments, fair value |  |
Description of location of interest rate derivatives designated as hedging instruments on the balance sheet | Accumulated other comprehensive income (1) | Accumulated other comprehensive income (1)

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