Derivatives and Hedging Activity - Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair value of derivative instruments
Fair Value of Derivatives in an Asset Position	$ 101,448	$ 28,943
Fair Value of Derivatives in a Liability Position	5,118	8,740
Interest rate swaps | Derivatives not designated as hedging instruments
Fair value of derivative instruments
Fair Value of Derivatives in an Asset Position	41,970	14,385
Fair Value of Derivatives in a Liability Position	140
Interest Rate Swap Guarantees | Derivatives not designated as hedging instruments
Fair value of derivative instruments
Fair Value of Derivatives in a Liability Position	1,289	614
Foreign exchange contracts | Derivatives not designated as hedging instruments
Fair value of derivative instruments
Fair Value of Derivatives in an Asset Position	57,243	14,558
Fair Value of Derivatives in a Liability Position	3,689	7,834
Credit spread instrument | Derivatives not designated as hedging instruments
Fair value of derivative instruments
Fair Value of Derivatives in an Asset Position	$ 2,235
Fair Value of Derivatives in a Liability Position		$ 292