Earnings Per Common Share (EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share, Basic and Diluted [Abstract]
Net income, basic	$ (3,569)	$ 973	$ 20,717	$ 12,615
Basic (in shares)	50,150	44,447	48,332	44,346
Basic (in dollars per share)	$ (0.07)	$ 0.02	$ 0.43	$ 0.28
Effect of dilutive stock options and warrants (in shares)	1,449	553	1,223	417
Net income, diluted	$ (3,569)	$ 973	$ 20,717	$ 12,615
Diluted (in shares)	51,599	45,000	49,555	44,763
Diluted (in dollars per share)	$ (0.07)	$ 0.02	$ 0.42	$ 0.28
Antidilutive securities excluded from EPS (in shares)	200	408	434	864