Business and Basis of Presentation - Additional Information (Details) $ / shares in Units, $ in Thousands			3 Months Ended
	Jul. 02, 2018 USD ($) $ / shares shares	Jun. 08, 2018	Dec. 31, 2018 USD ($) segment $ / shares shares	Sep. 30, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($)
Business And Basis Of Presentation [Line Items]
Number of reportable segments | segment			2
Repayments of debt			$ 5,185		$ 7,543
Extinguishment of debt, amount	$ 501,100
Common stock, authorized | shares			500,000,000	500,000,000
Preferred Stock, Shares Authorized | shares			50,000,000	50,000,000
Preferred stock, par value | $ / shares			$ 0.01	$ 0.01
Reverse stock split ratio		0.4276
Reverse stock split description			2.33839-for-one reverse stock split of the Company’s common stock.
Reverse stock split effective date		Jun. 08, 2018
MSD Partners
Business And Basis Of Presentation [Line Items]
Termination fee paid				$ 3,438
IPO
Business And Basis Of Presentation [Line Items]
Common stock, shares issued | shares	24,495,000
Initial offering price | $ / shares	$ 22.00
Net proceeds from the issuance of common stock	$ 501,172
Underwriting discounts and estimated offering expenses	$ 37,717
IPO | Third Amended and Restated Certificate of Incorporation
Business And Basis Of Presentation [Line Items]
Common stock, authorized | shares	500,000,000
Preferred Stock, Shares Authorized | shares	50,000,000
Preferred stock, par value | $ / shares	$ 0.01
IPO | Bright View Holdings | Monitoring Agreement
Business And Basis Of Presentation [Line Items]
Ownership interest in percentage	13.00%
IPO | Second Lien Credit Facility Term Loan Due 2021
Business And Basis Of Presentation [Line Items]
Repayments of debt	$ 110,000
IPO | Revolving Credit Facility
Business And Basis Of Presentation [Line Items]
Repayments of debt	55,000
IPO | First Lien Credit Facility Term Loans
Business And Basis Of Presentation [Line Items]
Repayments of debt	336,100
IPO | Kohlberg Kravis Roberts Capital Markets LLC.
Business And Basis Of Presentation [Line Items]
Underwriting discounts and estimated offering expenses	$ 5,497
IPO | Kohlberg Kravis Roberts Capital Markets LLC. | Monitoring Agreement
Business And Basis Of Presentation [Line Items]
Termination fee paid				$ 7,598
Ownership interest in percentage	55.90%