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Derivative Financial Instruments (Location and Fair Value of Derivative Instruments) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Derivatives not designated as hedging instruments, fair value |  |
Fair value of asset derivatives | $ 58,210 | $ 18,346
Fair value of liability derivatives | 58,210 | 18,346
Effective portion of interest rate cash flow hedge, fair value included in accumulated other comprehensive income | 6,193 | 2,539
Interest Rate Cash Flow Hedge Liability at Fair Value | $ 6,193 | $ 2,539
Accrued interest receivable and 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 | Accrued interest receivable and other assets | Accrued interest receivable and other assets
Accrued interest payable and 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 | Accrued interest payable and other liabilities | Accrued interest payable and other liabilities
Description of location of interest rate derivatives designated as hedging instruments on the balance sheet | Accrued interest payable and other liabilities | Accrued interest payable and other liabilities
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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