Long-Term Debt and Credit Facility - Long-Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Long-term Debt
Unamortized discount	$ (1,940)	$ (2,448)
Unamortized deferred financing costs	(3,273)	(4,234)
Total long-term debt	$ 307,287	$ 305,818
First Lien Credit Facility
Long-term Debt
Interest rate (as a percent)	6.71%	7.02%
Long-term debt	$ 312,500	$ 312,500

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt discount.

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Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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