Derivative Instruments and Hedging Activities - Schedule of Gross Amounts of Derivative Assets and Derivative Liabilities (Details) - Not Designated as Hedging Instruments - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Other Assets
Derivative Asset [Abstract]
Gross amounts recognized		$ 6,811	$ 8,590
Gross amounts offset		(1,369)	(1,630)
Net amounts presented in the Consolidated Balance Sheets		5,442	6,960
Net Amount		5,442	6,960
Derivative Liability [Abstract]
Gross amounts not offset	[1]	0	0
Other Liabilities
Derivative Liability [Abstract]
Gross amounts recognized		6,792	8,588
Gross amounts offset		(1,369)	(1,630)
Net amounts presented in the Consolidated Balance Sheets		5,423	6,958
Gross amounts not offset	[1]	(3,939)	(14,340)
Net Amount		$ 1,484	$ (7,382)

[1] Amounts represent posted collateral.