Taxation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	May 24, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective tax rate (as a percent)	3.80%		2.60%
Income tax expense	$ 1,594	$ 0	$ 1,594	$ 0
Federal and state statutory rate			23.50%
Deferred tax assets, net	301,358		$ 301,358		$ 245,836	$ 0
Deferred income tax assets, related to TRA	57,116		57,116
Tax receivable agreement liability	$ 255,823		$ 255,823			$ 0