Stockholders' Equity - Additional Information (Detail) - Stock Repurchase Programs [Member]	20 Months Ended
Sep. 30, 2019 shares
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, authorized shares	5,800,000
Number of shares repurchased by the Company	834,441

Number of shares that have been repurchased during the period and are being held in treasury.

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Period Type:	duration