Long-term Debt - Additional Information (Detail)				1 Months Ended			3 Months Ended				6 Months Ended		12 Months Ended
	Jan. 01, 2021 USD ($)	May 12, 2020 USD ($)	Sep. 16, 2019 USD ($)	Jul. 31, 2021 USD ($) shares	Jun. 30, 2021 USD ($) shares	Jan. 31, 2021 USD ($) shares	Jun. 30, 2022 USD ($) $ / shares	Sep. 30, 2021 USD ($) shares	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($) shares	Jun. 30, 2022 USD ($) d $ / shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	May 06, 2020 CounterParty $ / shares	Sep. 11, 2019 USD ($) CounterParty $ / shares
Debt Instrument [Line Items]
Aggregate principal amount converted												$ 126,129,000
Loss on conversion of debt												39,487,000
Forfeiture of accrued interest in exchange of convertible notes												1,668,000
ASU 2020-06 [Member]
Debt Instrument [Line Items]
Change in accounting principle accounting standards update adopted							true				true
Change in accounting principle accounting standards update adoption date							Jan. 01, 2021				Jan. 01, 2021
Increase (decrease) in net debt	$ 149,700,000
Decrease in net equity	149,700,000
Convertible notes	149,700,000
Non-cash interest expense	17,100,000
Amortization of debt issuance costs	1,100,000
Common Stock [Member]
Debt Instrument [Line Items]
Shares issued | shares										3,976,000
2019 Convertible Notes [Member]
Debt Instrument [Line Items]
Premium paid for capped call transactions													$ 28,400,000
2019 Convertible Notes [Member] | ASU 2020-06 [Member]
Debt Instrument [Line Items]
Debt issuance costs	2,400,000
Convertible notes	74,900,000
2020 Convertible Notes [Member]
Debt Instrument [Line Items]
Premium paid for capped call transactions													43,100,000
2020 Convertible Notes [Member] | ASU 2020-06 [Member]
Debt Instrument [Line Items]
Debt issuance costs	2,300,000
Convertible notes	$ 95,500,000
Capped Call Transactions [Member]
Debt Instrument [Line Items]
Number of counterparties | CounterParty														2	2
Initial conversion price | $ / shares														$ 39.4625	$ 39.4625
Initial cap price | $ / shares															63.14
Sale price | $ / shares															$ 31.57
Convertible Senior Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt instrument, stated percentage			3.50%
Debt instrument, due and payment description											The Convertible Notes are senior unsecured obligations of the Company and bear interest at a rate of 3.5% per year payable semiannually in arrears on March 15 and September 15 of each year, beginning on March 15, 2020.
Debt instrument, frequency of periodic payment											semiannually
Maturity date			Sep. 15, 2026
Threshold trading days | d											20
Threshold consecutive trading days | d											30
Threshold percentage of stock price trigger											130.00%
Redemption period, start date											Sep. 20, 2023
Redemption price, percentage											100.00%
Amortization of debt issuance costs							$ 100,000		$ 300,000		$ 200,000	600,000
Aggregate principal amount converted					$ 700,000
Aggregate principal amount converted into shares | shares					18,775
Debt interest expense							1,800,000		3,800,000		3,600,000	7,900,000
Accrued semi annual coupon payable							1,700,000		3,400,000		3,400,000	7,300,000
Debt issuance costs gross					$ 7,400,000		2,700,000		$ 7,400,000		2,700,000	$ 7,400,000	3,000,000.0
Long-term debt							$ 189,300,000				$ 189,300,000		$ 189,000,000.0
Convertible Senior Notes Due 2026 [Member] | Prior to March 15, 2026 Convertible [Member]
Debt Instrument [Line Items]
Threshold trading days | d											20
Threshold consecutive trading days | d											30
Threshold percentage of stock price trigger											130.00%
Trading price per principal amount											$ 1,000
Convertible Senior Notes Due 2026 [Member] | Prior to March 15, 2026 Convertible [Member] | Maximum [Member]
Debt Instrument [Line Items]
Threshold percentage of stock price trigger											98.00%
Convertible Senior Notes Due 2026 [Member] | Common Stock [Member]
Debt Instrument [Line Items]
Terms of conversion											The Convertible Notes are convertible into shares of the Company’s common stock at an initial conversion rate of 25.3405 shares per $1,000 principal amount of Convertible Notes (equivalent to an initial conversion price of approximately $39.4625 per share of common stock).
Conversion ratio											0.0253405
Conversion price | $ / shares							$ 39.4625				$ 39.4625
Convertible Senior Notes Due 2026 [Member] | 2019 Convertible Notes [Member]
Debt Instrument [Line Items]
Net proceeds from the sale of the notes			$ 212,900,000
Payment of convertible debt discounts and commissions			6,600,000
Payment of convertible debt offering expenses			500,000
Payments of transactions cost			28,400,000
Debt instrument effective interest rate															10.50%
Debt instrument convertible carrying amount of liability component															$ 145,100,000
Debt discount															74,900,000
Debt issuance costs															7,100,000
Convertible Senior Notes Due 2026 [Member] | 2019 Convertible Notes [Member] | Exchange Agreements [Member]
Debt Instrument [Line Items]
Conversion ratio				0.0253405		0.0253405
Debt issuance costs				$ 4,100,000		$ 3,300,000
Increase (decrease) in net debt				$ (197,000,000.0)		(122,800,000)
Aggregate principal amount converted						$ 126,100,000
Increase in shares outstanding | shares				5,992,217		3,906,869
Shares issued | shares				5,097,166		3,196,172
Additional shares issued | shares				895,051		710,697
Additional shares issued for settlement of debt issuance cost paid | shares				78,419		69,491		78,419
Loss on conversion of debt								$ 61,100,000		$ 39,500,000
Loss on conversion of debt related to additional shares issued								55,900,000		36,400,000
Additional amount issued in payment of issuance costs								5,200,000		$ 3,100,000
Forfeiture of accrued interest in exchange of convertible notes						$ 1,700,000
Convertible Senior Notes Due 2026 [Member] | 2019 Convertible Notes [Member] | Common Stock [Member] | Exchange Agreements [Member]
Debt Instrument [Line Items]
Aggregate principal amount converted into shares | shares						3,906,869
Convertible Senior Notes Due 2026 [Member] | 2019 Convertible Notes [Member] | Liability Component [Member]
Debt Instrument [Line Items]
Debt issuance costs															4,700,000
Convertible Senior Notes Due 2026 [Member] | 2019 Convertible Notes [Member] | Equity Component [Member]
Debt Instrument [Line Items]
Debt issuance costs															$ 2,400,000
Convertible Senior Notes Due 2026 [Member] | 2020 Convertible Notes [Member]
Debt Instrument [Line Items]
Net proceeds from the sale of the notes		$ 322,900,000
Payment of convertible debt discounts and commissions		5,700,000
Payment of convertible debt offering expenses		300,000
Payments of transactions cost		$ 43,100,000
Debt instrument effective interest rate		10.50%
Debt instrument convertible carrying amount of liability component		$ 204,500,000
Debt discount		95,500,000
Debt issuance costs		6,000,000.0
Convertible Senior Notes Due 2026 [Member] | 2020 Convertible Notes [Member] | Exchange Agreements [Member]
Debt Instrument [Line Items]
Convertible notes held in treasury							$ 327,200,000				$ 327,200,000
Convertible Senior Notes Due 2026 [Member] | 2020 Convertible Notes [Member] | Common Stock [Member] | Exchange Agreements [Member]
Debt Instrument [Line Items]
Aggregate principal amount converted into shares | shares				5,992,217
Convertible Senior Notes Due 2026 [Member] | 2020 Convertible Notes [Member] | Liability Component [Member]
Debt Instrument [Line Items]
Debt issuance costs		3,700,000
Convertible Senior Notes Due 2026 [Member] | 2020 Convertible Notes [Member] | Equity Component [Member]
Debt Instrument [Line Items]
Debt issuance costs		2,300,000
Convertible Senior Notes Due 2026 [Member] | 2019 and 2020 Convertible Notes [Member] | Exchange Agreements [Member]
Debt Instrument [Line Items]
Aggregate principal amount converted				$ 201,100,000
Forfeiture of accrued interest in exchange of convertible notes								$ 2,500,000
Convertible Senior Notes Due 2026 [Member] | Private Offering [Member] | 2019 Convertible Notes [Member]
Debt Instrument [Line Items]
Principal amount			$ 220,000,000.0
Convertible Senior Notes Due 2026 [Member] | Private Offering [Member] | 2020 Convertible Notes [Member]
Debt Instrument [Line Items]
Principal amount		$ 300,000,000.0