Stockholders' Equity and Earnings Per Common Share - Additional Information (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stockholders Equity and Earnings Per Common Share Additional Information [Abstract]
Outstanding Restricted Stock and Stock Success Unit Grant Prices Lower Limit	$ 12.45		$ 12.45
Outstanding Restricted Stock and Stock Success Unit Grant Prices Upper Limit	$ 49.31		$ 49.31
Antidilutive Securities Excluded from Computation of Earnings Per Share	300,000	1,800,000	900,000	1,500,000
Authorized Shares of Preferred Stock	25,000,000.0		25,000,000.0
Par Value Per Share of Preferred Stock	$ 0.10		$ 0.10
Issued Shares of Preferred Stock	0		0