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Debt - Interest Expense Recognized (Details) - USD ($) $ in Thousands		12 Months Ended
	Apr. 21, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Convertible Senior Notes Due 2026 \| Senior Notes
Debt Instrument
Contractual interest expense		$ (1,217)
Amortization of debt discount and debt issuance costs		(1,382)
Total		(2,599)
Credit Agreement
Debt Instrument
Interest paid		17,700
Revolving Credit Facility
Debt Instrument
Amortization of debt discount and debt issuance costs		(1,484)	$ (397)	$ (461)
Total		(8,204)	(1,007)	(2,026)
Revolving Credit Facility \| Bridge Loan
Debt Instrument
Unsecured bridge loan facility commitment fee	$ (6,400)	(6,407)	0	0
Interest paid		6,400	600	1,800
Revolving Credit Facility \| Senior Unsecured Revolving Credit Facility
Debt Instrument
Contractual interest expense		(618)
Revolving Credit Facility \| Term Loan
Debt Instrument
Contractual interest expense		(9,341)
Revolving Credit Facility \| 2021 Credit Agreement
Debt Instrument
Amortization of debt discount and debt issuance costs		(2,542)
Total		(12,501)
Revolving Credit Facility \| 2019 Credit Agreement
Debt Instrument
Contractual interest expense		$ (313)	$ (610)	$ (1,565)