Capital Stock - Schedule of Change in Treasury Shares (Detail) - shares	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2022
Stockholders' Equity Note [Abstract]
Beginning balance	15,101,535	10,002,646
Rabbi trust shares distributed/sold	0	(1,111)
Shares repurchased	5,710,000	10,810,000
Ending balance	20,811,535	20,811,535

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration