Derivative and Hedging Instruments Derivative Instruments and Hedging Activities Gain or Loss Recognized Related to Cash Flow Hedges (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Amount of loss related to the effective portion recognized in other comprehensive loss		$ (10,302)	$ 0	$ 0
Amount of loss related to the effective portion subsequently reclassified to earnings (1)	[1]	(2,510)	(2,508)	(2,513)
Amount of gain (loss) related to the ineffective portion and amount excluded from effectiveness testing		$ 0	$ 0	$ 0

[1] Consists of amounts from interest rate hedging programs entered into prior to 2015.