Earnings Per Common Share - Additional Information (Details) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of diluted earnings per common share (in shares)		200,000
Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of diluted earnings per common share (in shares)	800,000
Antidilutive securities excluded from earnings per share, average exercise price (in dollars per share)	$ 41.80	$ 52.06
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of diluted earnings per common share (in shares)	300,000	100,000