The minimum fixed charge coverage ratio that must be maintained to comply with the debt covenant. The fixed charge coverage ratio, as of the date of determination, is the ratio of (x) Consolidated EBITDA net of capital expenditures and cash taxes paid to (y) interest payments, scheduled principal payments, restricted payments and management fees paid to related parties.

No definition available.

Financing Arrangements - Term loan (Details) $ in Thousands				12 Months Ended
Financing Arrangements - Term loan (Details) $ in Thousands	Oct. 31, 2018 USD ($)	Dec. 21, 2017 USD ($)	Feb. 03, 2016 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2016
Financing Arrangements
Deferred financing costs				$ 3,400
Debt issuance costs written off					$ 876
CIT Bank, N.A. Term Loan
Financing Arrangements
Proceeds from secured debt			$ 160,000
Quarterly principal payment, as a percent			0.625%
Debt instrument term			6 years	5 years
Effective interest rate (as percent)						6.00%
Minimum leverage ratio, first period				4.75
Minimum leverage ratio, second period				4.5
Minimum fixed charge coverage ratio				1.25
Deferred financing costs	$ 5,600			$ 3,400	$ 4,600
Debt issuance costs written off	900
CIT Bank, N.A. Term Loan \| ABR
Financing Arrangements
Margin rate, as a percent			4.00%
CIT Bank, N.A. Term Loan \| London Interbank Offered Rate (LIBOR) [Member]
Financing Arrangements
Margin rate, as a percent			5.00%
Term A Loan
Financing Arrangements
Quarterly principal payment, as a percent				0.6925%
Effective interest rate (as percent)				5.79%	6.09%
Leverage ratio threshold				2.00
Repayment of principal	42,300
Repayment of accrued interest	1,500
Term A Loan \| ABR \| Entity Leverage Ratio In Category One Per Loan Agreement [Member]
Financing Arrangements
Margin rate, as a percent				2.75%
Term A Loan \| ABR \| Entity Leverage Ratio In Category Two Per Loan Agreement [Member]
Financing Arrangements
Margin rate, as a percent				2.25%
Term A Loan \| London Interbank Offered Rate (LIBOR) [Member] \| Entity Leverage Ratio In Category One Per Loan Agreement [Member]
Financing Arrangements
Margin rate, as a percent				3.75%
Term A Loan \| London Interbank Offered Rate (LIBOR) [Member] \| Entity Leverage Ratio In Category Two Per Loan Agreement [Member]
Financing Arrangements
Margin rate, as a percent				3.25%
Term B Loan
Financing Arrangements
Quarterly principal payment, as a percent				0.25%
Effective interest rate (as percent)				6.29%	6.59%
Repayment of principal	7,700
Repayment of accrued interest	300
Term B Loan \| ABR
Financing Arrangements
Margin rate, as a percent				3.25%
Term B Loan \| London Interbank Offered Rate (LIBOR) [Member]
Financing Arrangements
Margin rate, as a percent				4.25%
Revolving Credit Facility [Member]
Financing Arrangements
Debt instrument term			5 years
Leverage ratio threshold				2.00
Debt issuance costs		$ 400	$ 1,100
Repayment of principal	50,000
Repayment of accrued interest	$ 1,800
Revolving Credit Facility [Member] \| ABR \| Entity Leverage Ratio In Category One Per Loan Agreement [Member]
Financing Arrangements
Margin rate, as a percent				2.75%
Revolving Credit Facility [Member] \| ABR \| Entity Leverage Ratio In Category Two Per Loan Agreement [Member]
Financing Arrangements
Margin rate, as a percent				2.25%
Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Entity Leverage Ratio In Category One Per Loan Agreement [Member]
Financing Arrangements
Margin rate, as a percent				3.75%
Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Entity Leverage Ratio In Category Two Per Loan Agreement [Member]
Financing Arrangements
Margin rate, as a percent				3.25%