Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate 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.

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Period Type:	duration

Common Stock Repurchase Programs - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Aug. 31, 2018
Common Stock [Line Items]
Common stock authorized for repurchase					$ 500,000,000.0
Common stock repurchased	$ 4,719,000	$ 8,493,000	$ 145,280,000
Company's Common stock repurchased				$ 94,000,000.0
Common Stock [Member]
Common Stock [Line Items]
Repurchased common stock, shares	200,000	500,000