Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Additional Paid-in Capital	Retained Earnings (Deficit)	Non-controlling Interest	Common Class A	Common Class B	Common Class C	Total
Balance at Dec. 31, 2016	$ (33,726)	$ 7	$ (127,483)	$ 189	$ 6		$ (161,007)
Balance (in shares) at Dec. 31, 2016				18,936,000	62,003,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock sold in a public offering, net of underwriting discounts, commissions and offering costs	121,203			$ 46			121,249
Issuance of Class A common stock sold in a public offering, net of underwriting discounts, commissions and offering costs (in shares)				4,600,000
Non-controlling interest adjustment for purchase of common units from CWGS, LLC with proceeds from a public offering	(87,203)		87,203
Non-controlling interest adjustment for capital contribution of Class A common stock for an acquisition by a subsidiary	(3,678)		3,678
Issuance of Class A common stock for an acquisition by a subsidiary	5,719			$ 1			5,720
Issuance of Class A common stock for an acquisition by a subsidiary (in shares)				164,000
Equity-based compensation	5,109						5,109
Exercise of stock options	1,731			$ 1			1,732
Exercise of stock options (in shares)				80,000
Non-controlling interest adjustment for capital contribution of proceeds from the exercise of stock options	(970)		970
Vesting of restricted stock units	257		(257)
Vesting of restricted stock units (in shares)				33,000
Repurchases of Class A common stock for withholding taxes on vested RSUs	(368)						(368)
Repurchases of Class A common stock for withholding taxes on vested RSUs (in shares)				(9,000)
Redemption of LLC common units for Class A common stock	177,747		(881)	$ 130	$ (1)		176,995
Redemption of LLC common units for Class A common stock (in shares)				12,945,000	(11,166,000)
Distributions to holders of LLC common units			(149,633)				(149,633)
Dividends		(22,241)					(22,241)
Establishment of liabilities under the Tax Receivable Agreement and related changes to deferred tax assets associated with that liability	(136,485)						(136,485)
Non-controlling interest adjustment	(6,816)		6,816
Net income		29,853	200,839				230,692
Balance at Dec. 31, 2017	42,520	7,619	21,252	$ 367	$ 5		71,763
Balance (in shares) at Dec. 31, 2017				36,749,000	50,837,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation	14,088						14,088
Exercise of stock options	149						149
Exercise of stock options (in shares)				7,000
Non-controlling interest adjustment for capital contribution of proceeds from the exercise of stock options	(86)		86
Vesting of restricted stock units	881		(884)	$ 3
Vesting of restricted stock units (in shares)				298,000
Repurchases of Class A common stock for withholding taxes on vested RSUs	(1,364)			$ (1)			(1,365)
Repurchases of Class A common stock for withholding taxes on vested RSUs (in shares)				(77,000)
Disgorgement of short-swing profits by Section 16 officer	557						557
Redemption of LLC common units for Class A common stock	4,536		(153)	$ 3			4,386
Redemption of LLC common units for Class A common stock (in shares)				215,000	(130,000)
Distributions to holders of LLC common units			(101,755)				(101,755)
Dividends		(22,697)					(22,697)
Establishment of liabilities under the Tax Receivable Agreement and related changes to deferred tax assets associated with that liability	(1,576)						(1,576)
Non-controlling interest adjustment	(12,174)		12,174
Net income		10,398	55,183				65,581
Balance at Dec. 31, 2018	47,531	(3,370)	(11,621)	$ 372	$ 5		32,917
Balance (in shares) at Dec. 31, 2018				37,192,364	50,706,629	1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of accounting standard (see Note 1 - Summary of Significant Accounting Policies) | ASU 2014-09		1,310	2,476				3,786
Equity-based compensation	13,145						13,145
Vesting of restricted stock units	736		(740)	$ 4
Vesting of restricted stock units (in shares)				417,000
Repurchases of Class A common stock for withholding taxes on vested RSUs	(1,477)			$ (1)			(1,478)
Repurchases of Class A common stock for withholding taxes on vested RSUs (in shares)				(126,000)
Redemption of LLC common units for Class A common stock	(478)						(478)
Redemption of LLC common units for Class A common stock (in shares)				6,000
Distributions to holders of LLC common units			(70,192)				(70,192)
Dividends		(22,878)					(22,878)
Establishment of liabilities under the Tax Receivable Agreement and related changes to deferred tax assets associated with that liability	(8)						(8)
Non-controlling interest adjustment	(9,297)		9,297
Net income		(60,591)	(59,710)				(120,301)
Balance at Dec. 31, 2019	$ 50,152	(83,134)	(126,634)	$ 375	$ 5		(159,236)
Balance (in shares) at Dec. 31, 2019				37,488,989	50,706,629	1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of accounting standard (see Note 1 - Summary of Significant Accounting Policies) | ASU 2016-02		$ 3,705	$ 6,332				$ 10,037