Debt - Interest Expense Related to 0.875% Convertible Senior Notes (Detail) - 0.875% Convertible Senior Notes [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Instrument [Line Items]
Coupon interest	$ 454	$ 454	$ 1,364	$ 1,364
Amortization of discounts and debt issuance costs	228	1,479	684	4,412
Total interest expense related to the 0.875% Convertible Senior Notes	$ 682	$ 1,933	$ 2,048	$ 5,776

Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Balance Type:	debit
Period Type:	duration