Earnings Per Share - Potentially Dilutive Securities (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock options | Common stock
Incremental Weighted Average Shares Attributable to Dilutive Effect
Antidilutive securities excluded from computation of diluted earnings per share	1,657,437	1,019,930	545,693
RSUs
Incremental Weighted Average Shares Attributable to Dilutive Effect
Antidilutive securities excluded from computation of diluted earnings per share	50,113	87,720	537
Performance share units
Incremental Weighted Average Shares Attributable to Dilutive Effect
Antidilutive securities excluded from computation of diluted earnings per share	9,704	84,809	0