Schedule of Stock Compensation Plan Activity (Detail) - shares shares in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award
Awarded	728	660	447
Forfeited	(58)	(51)	(70)
Outstanding at January 1	188	171	216
Granted	41	42	34
Exercised	(56)	(25)	(78)
Forfeited	(2)		(1)
Outstanding at December 31	171	188	171
Vested and expected to vest at December 31	171	188	171
Exercisable at December 31	68	69	30
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Non-vested at January 1	1,317	1,417	1,789
Awarded	728	660	447
Vested	(609)	(709)	(749)
Forfeited	(58)	(51)	(70)
Non-vested at December 31	1,378	1,317	1,417

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Number of share options (or share units) exercised during the current period.

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