Derivatives and Hedging - Cash Flow Hedges (Details) - Derivatives designated as hedging instrument - Cash flow hedges - Interest Rate Swap - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges not terminated, net fair value	$ (31,300,000)
Fair value hedges weighted average expected remaining term	1 year 6 months 40 days
Maximum length of time hedged in interest rate cash flow hedge	4 years 3 months 30 days
Interest rate and foreign currency exchange contracts:
Net change in amount recognized in other comprehensive income	$ (9,866,000)	$ 2,739,000
Amount reclassified from accumulated other comprehensive income (loss) into net income	5,694,000	519,000
Amount of ineffectiveness recognized in net income	0	0
Interest Income
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge gain (loss) to be reclassified within twelve months	(34,400,000)
Interest rate and foreign currency exchange contracts:
Amount of ineffectiveness recognized in net income	$ (749,000)	$ 0