Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Non-Current Liabilities [Line Items]
Other	$ 5,611	$ 4,642
Other noncurrent liabilities	140,833	164,630
Tax amortization benefit contingency
Other Non-Current Liabilities [Line Items]
Contingent consideration	132,724	137,288
Deferred acquisition payment
Other Non-Current Liabilities [Line Items]
Deferred revenue - non-current	$ 2,498	$ 22,700