Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands										1 Months Ended	9 Months Ended
	Nov. 01, 2017	Oct. 30, 2017	Oct. 27, 2017	Oct. 06, 2017	Jun. 09, 2017	Jun. 05, 2017	May 31, 2017	Mar. 17, 2017	Nov. 08, 2016	May 31, 2017	Sep. 30, 2017
Subsequent events
Proceeds, net of underwriting discounts and commissions					$ 16,000						$ 121,445
Class A common stock
Subsequent events
Number of shares issued							4,000,000				4,600,000
Offering price (in dollars per share)							$ 27.75			$ 27.75
Proceeds, net of underwriting discounts and commissions							$ 106,600
Class A common stock | Over allotment
Subsequent events
Number of shares issued					600,000	600,000
CVRV Acquisition II LLC | Class A common stock
Subsequent events
Shares sold that were previously held					176,538					1,176,917
CVRV Acquisition LLC | Class A common stock
Subsequent events
Shares of common stock redeemed for shares of common stock					648,462		4,323,083			4,323,083
CVRV Acquisition LLC | Class B common stock
Subsequent events
Number of common stock cancelled					648,462		4,323,083			4,323,083
Line of Credit | Existing Senior Secured Credit Facility | Secured Debt
Subsequent events
Maximum borrowing capacity, increase in capacity								$ 95,000
Maximum borrowing capacity								$ 740,000	$ 680,000
Line of Credit | Existing Senior Secured Credit Facility, Term Loan Facility | Secured Debt
Subsequent events
Maximum borrowing capacity									$ 645,000
Principal payment frequency									quarterly
Line of Credit | Existing Senior Secured Credit Facility, Term Loan Facility | Secured Debt | Interest on Debt Instrument, Option Two
Subsequent events
Variable rate spread (as a percent)											2.75%
Line of Credit | Existing Senior Secured Credit Facility, Term Loan Facility | Secured Debt | Interest on Debt Instrument, Option One | London Interbank Offered Rate (LIBOR)
Subsequent events
Variable rate spread (as a percent)									3.75%		3.75%
Subsequent Events | Tax receivable agreement
Subsequent events
Increase in current portion of the tax receivable agreement		$ 5,700
Increase in the non-current portion of the tax receivable agreement liability		106,000
Increase in deferred tax assets		143,000
Increase in additional paid-in capital		$ 31,300
Subsequent Events | October 2017 Selling Stockholders | Class A common stock
Subsequent events
Number of shares issued		6,700,000
Offering price (in dollars per share)		$ 40.50
Shares issued by selling stockholders	963,799
Subsequent Events | October 2017 Selling Stockholders | Class A common stock | Over allotment
Subsequent events
Number of shares issued			1,005,000
Subsequent Events | CWGS Holding, LLC and CVRV Acquisition LLC | Class A common stock
Subsequent events
Redemption of common stock by selling shareholders	779,026	5,415,529
Shares of common stock redeemed for shares of common stock	779,026	5,415,529
Subsequent Events | CWGS Holding, LLC and CVRV Acquisition LLC | Class B common stock
Subsequent events
Number of common stock cancelled	779,026	5,415,529
Subsequent Events | CVRV Acquisition II LLC and Crestview Advisors LLC
Subsequent events
Shares sold that were previously held		1,284,471
Subsequent Events | CVRV Acquisition II LLC and Crestview Advisors LLC | Class A common stock
Subsequent events
Shares sold that were previously held	184,773
Subsequent Events | Existing Senior Secured Credit Facility, Term Loan Facility | Secured Debt | Interest on Debt Instrument, Option Two
Subsequent events
Variable rate spread (as a percent)				2.00%
Subsequent Events | Line of Credit | Existing Senior Secured Credit Facility, Term Loan Facility | Secured Debt
Subsequent events
Maximum borrowing capacity, increase in capacity				$ 205,000
Maximum borrowing capacity				$ 939,500
Principal payment frequency				quarterly
Quarterly amortization payment				$ 2,400
Subsequent Events | Line of Credit | Existing Senior Secured Credit Facility, Term Loan Facility | Secured Debt | Interest on Debt Instrument, Option One | London Interbank Offered Rate (LIBOR)
Subsequent events
Variable rate spread (as a percent)				3.00%