Derivative Instruments - Fair Value Hedge Impact on Statement of Income (Details) - Interest Rate Swap - Designated as Hedging Instrument - Interest Expense - Fair Value Hedging - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	$ (7,650)	$ 0
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	$ 7,650	$ 0