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Long-term Debt - 2025 Notes (Details) $ / shares in Units, shares in Millions	1 Months Ended	3 Months Ended
	Oct. 31, 2018 USD ($) shares $ / shares	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Oct. 24, 2018 USD ($)	Oct. 22, 2018 USD ($)
Debt Instrument [Line Items]
Stockholders' equity		$ (611,209,000)	$ (617,298,000)			$ (693,633,000)	$ (619,600,000)
Amortization of deferred financing costs		539,000	4,370,000
Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Stockholders' equity						66,383,000
Common Stock
Debt Instrument [Line Items]
Stockholders' equity		(916,000)	(868,000)			(908,000)	(859,000)
Additional Paid-In Capital
Debt Instrument [Line Items]
Stockholders' equity		(1,224,250,000)	(1,236,847,000)			(1,340,989,000)	(1,229,320,000)
Additional Paid-In Capital | Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Stockholders' equity						106,172,000
Additional Paid-In Capital | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Stockholders' equity					$ (106,200,000)
Retained Earnings (Accumulated Deficit)
Debt Instrument [Line Items]
Stockholders' equity		592,340,000	598,985,000			626,779,000	$ 589,178,000
Retained Earnings (Accumulated Deficit) | Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Stockholders' equity						(39,789,000)
Retained Earnings (Accumulated Deficit) | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Stockholders' equity					(39,800,000)
2025 Notes
Debt Instrument [Line Items]
Debt issuance costs	$ 5,900,000
Senior Notes | 2025 Notes
Debt Instrument [Line Items]
Face amount	$ 172,500,000	172,500,000				$ 172,500,000		$ 22,500,000	$ 150,000,000
Interest rate	1.50%
Interest expense		600,000	600,000	$ 600,000
Conversion price (in dollars per share) | $ / shares	$ 33.43
Initial conversion amount (in shares) | shares	5.2
Carrying amount	$ 100,700,000
Proceeds from issuance of debt	166,600,000
Debt issuance costs	$ 3,400,000
Amortization of deferred financing costs		$ 300,000	$ 2,400,000
Repurchase covenant, repurchase price due to fundamental change as percentage of principal amount	100.00%
Repurchase covenant, sale price as a percentage of conversion price (at least)	130.00%
Repurchase covenant, trading days, minimum	20 days
Repurchase covenant, consecutive trading days, minimum	30 days
Repurchase covenant, repurchase price due to change in sale price as percentage of conversion price	100.00%
Senior Notes | 2025 Notes | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Carrying amount					41,300,000
Senior Notes | 2025 Notes | Common Stock
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 71,800,000
Debt issuance costs	$ 2,500,000
Senior Notes | 2025 Notes | Common Stock | Class A Common Stock
Debt Instrument [Line Items]
Initial conversion rate per $ 1000 principal amount	0.0299135
Senior Notes | 2025 Notes | Additional Paid-In Capital | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06 | Equity Component of Long Term Debt
Debt Instrument [Line Items]
Stockholders' equity					71,800,000
Senior Notes | 2025 Notes | Additional Paid-In Capital | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06 | Deferred Financing Fees
Debt Instrument [Line Items]
Stockholders' equity					(2,500,000)
Senior Notes | 2025 Notes | Retained Earnings (Accumulated Deficit) | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Stockholders' equity					$ 28,100,000

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