Schedule - Valuation and Qualifying Accounts (Detail) (Parenthetical) $ in Millions	12 Months Ended
Dec. 31, 2020 USD ($)
Accounting Standards Update 2016-13 [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Cumulative Effect Adjustment Credit Losses	$ 3.1

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	srt_ValuationAndQualifyingAccountsDisclosureLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration