Debt - Narrative (Details)			3 Months Ended		9 Months Ended
	Apr. 30, 2021 USD ($)	Mar. 01, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Apr. 12, 2017 USD ($)
Debt Instrument [Line Items]
Fixed charge coverage ratio	120.00%
Leverage ratio, maximum	3.75
Leverage ratio, step down, term one	3.50
Leverage ratio, step down, term two	3.25
Leverage ratio, step down, term three	3.00
Amortization payments year one percentage	5.00%
Amortization payments year two percentage	7.50%
Amortization payments year three percentage	10.00%
Amortization payments year four percentage	12.50%
Amortization payments year five percentage	15.00%
Loss on extinguishment of debt			$ 0	$ 0	$ 7,155,000	$ 0
Repayment premium	$ 3,000,000
Cash payments for interest					7,000,000	$ 9,300,000
Eurodollar Rate Loans
Debt Instrument [Line Items]
Prepayment, principal amount					1,000,000
Prepayment, multiple					1,000,000
Base Rate
Debt Instrument [Line Items]
Prepayment, principal amount					500,000
Prepayment, multiple					100,000
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Secured term loan facility	125,000,000
Accordion feature amount	75,000,000
Accordion feature less the principal amount of incremental facilities	$ 75,000,000
Net average secured leverage ratio	2.50
Outstanding borrowings			31,300,000		31,300,000
Availability of borrowing			92,300,000		92,300,000
Incremental term loan			31,300,000		31,300,000
Deferred financing costs			1,300,000		1,300,000
Line of Credit | Bridge Loan
Debt Instrument [Line Items]
Secured term loan facility	$ 10,000,000
Line of Credit | Letter of Credit
Debt Instrument [Line Items]
Secured term loan facility	10,000,000
Outstanding borrowings			1,400,000		1,400,000		$ 1,600,000
Incremental term loan			$ 1,400,000		$ 1,400,000		1,600,000
Term loan and security agreement due 2023
Debt Instrument [Line Items]
Write off of deferred debt issuance cost	3,700,000
Debt instrument, fee amount	500,000
Term loan and security agreement due 2023 | Line of Credit
Debt Instrument [Line Items]
Secured term loan facility	$ 150,000,000							$ 175,000,000
ABL Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Deferred financing costs							$ 400,000
Third ARLS Agreement | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Secured term loan facility		$ 90,000,000
Capacity available for trade purchases		7,000,000
Increase in the size of revolving credit facility		$ 50,000,000