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Stockholders' Equity - Additional Information (Detail) - USD ($)			3 Months Ended				6 Months Ended
	Jul. 27, 2021	Jul. 25, 2011	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Stockholders Equity [Line Items]
Common stock, value of shares authorized to repurchase		$ 200,000,000
Stock repurchase, shares		2,600,000	0		0		0	0
Value of shares repurchased		$ 127,000,000
Cash dividends per common share			$ 0.22	$ 0.20	$ 0.20	$ 0.20	$ 0.42	$ 0.40
Dividend payment to common shareholders							$ 23,300,000	$ 22,000,000.0
Subsequent Event [Member]
Stockholders Equity [Line Items]
Dividend declared date	Jul. 26, 2021
Cash dividend to be paid	$ 0.22
Dividend to be paid date	Sep. 10, 2021
Dividend declared, shareholders of record date	Aug. 30, 2021

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Stockholders Equity [Line Items]

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Date the declared dividend will be paid, in CCYY-MM-DD format.

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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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.

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