Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accrued Liabilities, Current [Abstract]
Interest	$ 35,444	$ 15,770
Employee related costs	75,913	122,590
Income taxes payable	100,318	43,083
Other accrued expenses	88,525	102,986
Total accrued liabilities	$ 300,200	$ 284,429