Derivatives (Details 4) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Derivative [Line Items]
Derivative assets	[1]	$ 27,419	$ 11,789	$ 29,582
Interest rate contracts | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative liabilities		(4,618)	(3,133)	0
Interest rate contracts | Hedging Instrument
Derivative [Line Items]
Derivative liabilities		(96)	(191)	0
Foreign currency contract | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative assets		1,478	0	0
Other long term liabilities | Interest rate contracts | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative liabilities		(4,618)	(3,133)	0
Other long term liabilities | Interest rate contracts | Hedging Instrument
Derivative [Line Items]
Derivative liabilities		0	0	0
Other short term liabilities | Interest rate contracts | Hedging Instrument
Derivative [Line Items]
Derivative liabilities		(96)	(191)	0
Short term assets | Foreign currency contract | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative assets		$ 1,478	$ 0	$ 0

[1] Includes associated cash posted/received as collateral