Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other Non-Current Liabilities [Line Items]
Other	$ 4,694	$ 4,642
Other noncurrent liabilities	177,706	164,630
Tax amortization benefit contingency
Other Non-Current Liabilities [Line Items]
Contingent consideration	148,300	137,288
Deferred payment
Other Non-Current Liabilities [Line Items]
Contingent consideration	$ 24,712	$ 22,700