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Debt - Deferred Financing Costs (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2021
Debt Instrument [Line Items]
Deferred financing costs related to convertible notes				$ 3,700
Amortization expenses of deferred financing costs included in Interest expense	$ 1,900	$ 1,900	$ 1,800
Senior Convertible Notes 2016
Debt Instrument [Line Items]
Deferred financing costs related to convertible notes	0	$ 1,170
2021 Credit Agreement
Debt Instrument [Line Items]
Deferred financing costs related to convertible notes	$ 3,400
Credit Agreement and Convertible Notes | Debt Offerings
Debt Instrument [Line Items]
Weighted-average interest rate on debt borrowings	5.00%	5.00%	6.00%

X

- Definition

Amount of amortization expense attributable to debt issuance costs.

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- Definition

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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- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

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