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Debt - Summary of Long Term Debt (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) day $ / shares shares	Dec. 31, 2020 USD ($) $ / shares
Debt Instrument [Line Items]
Net carrying value	$ 389,789	$ 389,254
Debt conversion, converted instrument, shares issued | shares	4,100
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Senior Loans | Senior Secured Term Loan due 2026
Debt Instrument [Line Items]
Long-term debt	$ 400,000	$ 400,000
Less: debt discount	(7,139)	(7,434)
Less: deferred financing	(5,371)	(5,592)
Net carrying value	387,490	386,974
Convertible Notes | Convertible Senior Notes 2016, Due 2023
Debt Instrument [Line Items]
Long-term debt	2,800	2,825
Less: debt discount	(476)	(518)
Less: deferred financing	(25)	(27)
Net carrying value	$ 2,299	$ 2,280
Threshold percentage	130.00%
Threshold trading days	20 days
Threshold consecutive trading days | day	30
Debt conversion, converted instrument, amount	$ 25

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- Definition

Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Face amount or stated value per share of common stock.

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The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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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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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

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Amount, after accumulated amortization, of debt discount.

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Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period.

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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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