Fair Value Measurements (Details 2) - Contingent consideration $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Financial instruments measured at Level 3 fair value on a recurring basis rollforward
Balance, beginning period	$ 172,320
Measurement period adjustment	223
Accretion	7,835
Mark to market adjustment	(3,100)
Balance, ending period	177,278
Contingent Consideration Under Tax Receivables Agreement
Financial instruments measured at Level 3 fair value on a recurring basis rollforward
Balance, beginning period	149,620
Measurement period adjustment	2,223
Accretion	4,302
Mark to market adjustment	0
Balance, ending period	156,145
Contingent Consideration For Achievement Of Specified Average Adjusted Ebitda
Financial instruments measured at Level 3 fair value on a recurring basis rollforward
Balance, beginning period	22,700
Measurement period adjustment	(2,000)
Accretion	3,533
Mark to market adjustment	(3,100)
Balance, ending period	$ 21,133