Earnings Per Share - Additional Information (Detail) - Performance Restricted Stock Units [Member] - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2022	Jun. 30, 2021
Schedule Of Earnings Per Share [Line Items]
Common shares, shares issued	519,255
Mark-to-market adjustment		$ (5.6)

Number, before forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

No definition available.

Name:	us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration