Other noncurrent liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Non-Current Liabilities [Line Items]
Deferred revenue - non-current	$ 0
Other	4,642
Other noncurrent liabilities	164,630
Tax amortization benefit contingency
Other Non-Current Liabilities [Line Items]
Contingent consideration	137,288
Deferred payment
Other Non-Current Liabilities [Line Items]
Contingent consideration	$ 22,700
Predecessor
Other Non-Current Liabilities [Line Items]
Deferred revenue - non-current		$ 4,333
Other		3,128
Other noncurrent liabilities		$ 7,461