Income Taxes - Carryforwards Expiration (Detail) $ in Thousands	Dec. 31, 2019 USD ($)
Income Tax Disclosure [Abstract]
2020	$ 0
2021	3,728
2022	48,848
2023	20,981
2024 and thereafter	229,615
Total	$ 303,172

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates.

No definition available.

Name:	us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant