Information about Stock Options Outstanding (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range | $ / shares	$ 12.75
Outstanding, shares | shares	1
Exercise Price Range, $ 12.75
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range | $ / shares	$ 12.75
Outstanding, shares | shares	1	[1]
Outstanding, average life (years)	1 month 9 days	[1],[2]

[1] Shares for both options outstanding and exercisable have no aggregate intrinsic value.

[2] Average contractual life remaining in years.