Income Taxes - Expiration of Loss and Tax Credit Carryforwards (Detail) $ in Thousands	Dec. 31, 2021 USD ($)
Operating Loss and Tax Credit Carryforward [Line Items]
Loss Carryforward	$ 446,215
Tax Credit Carryforward	100,574
2022–2026
Operating Loss and Tax Credit Carryforward [Line Items]
Loss Carryforward	39,420
Tax Credit Carryforward	870
Thereafter
Operating Loss and Tax Credit Carryforward [Line Items]
Loss Carryforward	154,475
Tax Credit Carryforward	75,802
No expiration date
Operating Loss and Tax Credit Carryforward [Line Items]
Loss Carryforward	252,320
Tax Credit Carryforward	$ 23,902