Fair Value Measurements - Level 3 Rollforward (Details) - Other income (expense) [Member] - Other derivative financial instrument [Member] - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 other derivative — Beginning of Period		$ 13,900	$ 2,800	$ 11,600	$ 2,800
Fair value adjustments	[1]	2,200	0	4,500	0
Level 3 other derivative — End of Period		$ 16,100	$ 2,800	$ 16,100	$ 2,800

[1] Changes in the fair value are recorded in Other expense, net in the condensed consolidated statements of operations.