Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other Non-Current Liabilities [Line Items]
Other	$ 4,633	$ 4,642
Other noncurrent liabilities	182,826	164,630
Tax amortization benefit contingency
Other Non-Current Liabilities [Line Items]
Contingent consideration	149,868	137,288
Deferred payment
Other Non-Current Liabilities [Line Items]
Contingent consideration	$ 28,325	$ 22,700