Stockholders' Equity and Earnings Per Common Share - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Stockholders Equity and Earnings Per Common Share Additional Information [Abstract]
Exercise Price Floor on Outstanding Stock Options	$ 23.35
Exercise Price Ceiling on Outstanding Stock Options	26.29
Outstanding Restricted Stock Unit Grant Prices Lower Limit	32.38
Outstanding Restricted Stock Unit Grant Prices Upper Limit	55.26
Outstanding Performance Share Unit Awards Grant Price Range Lower Limit	37.67
Outstanding Performance Share Unit Awards Grant Price Range Upper Limit	$ 49.86
Number of Antidilutive Securities Excluded from Computation of Earnings Per Share | shares	1,300,000
Authorized Shares of Preferred Stock | shares	25,000,000
Par Value Per Share of Preferred Stock	$ 0.10
Issued Shares of Preferred Stock | shares	0