Derivative Instruments - Non-hedge Derivatives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (1,109)	$ (80)	$ (33)
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional	3,131,832	2,592,778
Estimated fair value	(1,317)	(208)
Not Designated as Hedging Instrument | Assets
Derivative [Line Items]
Notional	1,565,916	1,296,389
Estimated fair value	101,602	43,507
Not Designated as Hedging Instrument | Liabilities
Derivative [Line Items]
Notional	1,565,916	1,296,389
Estimated fair value	$ (102,919)	$ (43,715)