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Long-term Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt	$ 178,585	$ 183,537
Less: Current portion	(18,231)	(17,778)
Long-term debt	160,354	165,759
Unamortized debt issuance costs	3,100	600
2026 Notes
Debt Instrument [Line Items]
Total debt	130,851	0
Long-term debt, gross	135,000
2023 Notes
Debt Instrument [Line Items]
Total debt	25,728	143,242
Unamortized debt issuance costs	241	1,819
Long-term debt, gross	25,969	157,369
Promissory note
Debt Instrument [Line Items]
Total debt	17,534	17,095
Other debt and finance lease obligations
Debt Instrument [Line Items]
Total debt	4,472	4,792
Revolving Credit Facility
Debt Instrument [Line Items]
Total debt	$ 0	$ 18,408

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- Definition

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 issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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