Earnings (Loss) Per Common Share (EPS) - Diluted EPS (Details) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share, Basic and Diluted [Abstract]
Average common shares outstanding (in shares)	55,717	55,246
Effect of dilutive stock awards (in shares)	1,261
Total potential shares outstanding (in shares)	56,978	55,246
Diluted EPS (in dollars per share)	$ 0.19	$ (0.06)
Equity awards excluded as the impact was anti-dilutive (in shares)	1,042	4,340