Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income (loss) before income taxes
U.S. operations	$ 154,947	$ 158,487	$ 136,744
Non-U.S. operations	60,982	35,071	50,856
Income before income taxes and non-controlling interest	215,929	193,558	187,600
Current provision
U.S. current provision	7,584
State and Local provision	108
Non-U.S. current provision	6,762	4,263	3,660
Deferred benefit
U.S. deferred provision (benefit)	3,345
State and Local provision (benefit)	48
Non-US deferred provision (benefit)	592	(762)	1,737
Provision (benefit) for income taxes	$ 18,439	$ 3,501	$ 5,397
Reconciliation of tax provision
Tax provision at the U.S. federal statutory rate (as a percent)	35.00%
Less: rate attributable to noncontrolling interest	(27.80%)
State, local and foreign taxes, net of federal benefit	1.40%	1.80%	2.90%
Provision for income taxes (as a percent)	8.60%	1.80%	2.90%
Deferred income tax assets
Tax Receivable Agreement	$ 187,010
Share-based compensation	5,647	$ 947
Fixed assets	1,083	30
Total deferred income tax assets	193,740	977
Deferred income tax liabilities
Fixed assets	202
Total deferred income tax liabilities	202
Unrecognized tax benefits	$ 0	$ 0