Earnings Per Common Share (EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share, Basic and Diluted [Abstract]
Net income, Basic EPS	$ 6,859	$ 10,941		$ 16,210
Basic EPS (in shares)	55,017	50,473	54,967	50,376
Basic EPS (in dollars per share)	$ 0.12	$ 0.22	$ 0.24	$ 0.32
Effect of dilutive stock options (in shares)	1,538	1,681	1,556	1,657
Net income, Diluted EPS	$ 6,859	$ 10,941	$ 13,054	$ 16,210
Diluted EPS (in shares)	56,555	52,154	56,523	52,033
Diluted EPS (in dollars per share)	$ 0.12	$ 0.21	$ 0.23	$ 0.31
Stock options excluded from the calculation of common stock equivalents as the impact was anti-dilutive (in shares)	1,185	535	1,081	359