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Derivative Financial Instruments (Location and Fair Value of Derivative Instruments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 | Sep. 30, 2021 | Dec. 31, 2020
Derivatives not designated as hedging instruments, fair value |  |  |
Fair value of asset derivatives |  | $ 28,678 | $ 49,377
Fair value of liability derivatives |  | 28,678 | 49,377
Interest Rate Cash Flow Hedge Asset at Fair Value |  | 3,212 | 5,550
Interest Rate Cash Flow Hedge Liability at Fair Value |  | $ 3,212 | $ 5,550
Asset Derivatives |  |  |
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 |
Liability Derivatives |  |  |
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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