Income Taxes - Schedule of Income Tax Benefit Differs from Amount Computed at Federal Statutory Corporate Tax Rate (Details) - USD ($) $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2018	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal tax at statutory rate		$ (8,140)		$ (19,952)	$ (29,456)
State tax, net of federal tax benefit		(392)		(5,199)	(4,966)
Tax effect of:
Equity-based compensation		1,059		2,360	971
Provision to return and deferred tax adjustments		(48)		(646)	938
Non-deductible promotional and entertainment expense		510		974	1,199
Fuel tax credit and other credits		(563)		(740)	(1,527)
Change in uncertain tax positions		(1,251)		579
Non-deductible IPO costs				1,622
Domestic production activities deduction	[1]			(1,741)
Rate change	[2]			(43,429)
Other, net		(460)		(76)	338
Total income tax benefit		$ (9,285)	$ (17,769)	$ (66,248)	$ (32,503)

[1] In 2018, the Company calculated refund claims related to the domestic production activities deduction. The refund claims reduced the tax provision by $1,741.

[2] In 2018, the inclusion of the revaluation of the net deferred tax liability attributable to the 2017 Tax Act reduced the tax provision by $43,429.