Other Assets (Impact of Derivative Hedging Instruments on AOCI) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivatives used in Net Investment Hedge, Net of Tax [Roll Forward]
Balance at beginning of period	$ (22,675)	$ 3,121	$ (11,424)
Net (loss)/gain on Swaps	(50,127)	(23,342)	14,545
Reclassification adjustment for losses/gains related to hedging instruments included in net income	72,802	(2,454)	0
Balance at end of period	$ 0	$ (22,675)	$ 3,121