Earnings (Loss) Per Common Share (EPS) - Basic EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share, Basic and Diluted [Abstract]
Net income (loss)	$ (3,154)	$ 6,195
Average common shares outstanding (in shares)	55,246	54,917
Basic EPS (in dollars per share)	$ (0.06)	$ 0.11