Earnings Per Share - Additional Information (Detail) - 2011 Share Repurchase Program [Member] - shares	3 Months Ended	103 Months Ended
	Mar. 31, 2020	Mar. 31, 2020	Mar. 16, 2016	Aug. 18, 2011
Equity, Class of Treasury Stock [Line Items]
Maximum amount of shares authorized for repurchase			10,000,000.0	5,000,000.0
Total Number of Shares Repurchased	860,000	7,300,000
Increase in shares authorized for repurchase			5,000,000.0