Derivatives and Hedging Activity - Effect on Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivatives
Gain (loss) on derivative financial instruments, net	$ 9,710	$ (2,207)
Interest rate swaps
Derivatives
Gain (loss) on derivative financial instruments, net	(45,125)	(3,757)
Interest rate swap guarantees
Derivatives
Gain (loss) on derivative financial instruments, net	(675)	(182)
Foreign exchange contracts
Derivatives
Gain (loss) on derivative financial instruments, net	53,265	2,444
Credit spread instrument
Derivatives
Gain (loss) on derivative financial instruments, net	$ 2,245	$ (712)