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Stock Repurchase Program - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Nov. 04, 2019
Stockholders Equity Note [Abstract]
Stock repurchase authorized amount				$ 50,000,000.0
Shares repurchased under stock repurchase program	0.4	0.4	1.3
Shares repurchased during period	$ 5,400,000	$ 5,400,000	$ 17,300,000
Average price of repurchased stock	$ 12.23	$ 12.23	$ 13.48
Available authorized repurchase amount	$ 22,900,000	$ 22,900,000

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- Definition

Stock repurchased during period value weighted average price.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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- Definition

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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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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