Capital Stock - Schedule of Change in Treasury Shares (Detail) - shares	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2023
Stockholders' Equity Note [Abstract]
Beginning balance	24,401,065	24,001,535
Rabbi trust shares distributed/sold	0	(470)
Shares repurchased, shares	0	400,000
Ending balance	24,401,065	24,401,065

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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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration