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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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