Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other Non-Current Liabilities [Line Items]
Other	$ 6,793	$ 5,611
Total other noncurrent liabilities	145,455	140,833
Tax amortization benefit contingency
Other Non-Current Liabilities [Line Items]
Tax amortization benefit contingency	136,788	132,724
Deferred payment
Other Non-Current Liabilities [Line Items]
Deferred payment	$ 1,874	$ 2,498