Net Income (Loss) per Common Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income (loss) available to common shareholders	$ 1,468	$ 215	$ 3,964	$ (1,333)
Weighted average common shares outstanding (shares)	123,016	121,556	122,654	121,076
Dilutive effect of equity incentive plans	$ 34	$ 2	$ 1	$ 0
Weighted average common shares outstanding, assuming dilution (shares)	123,050	121,558	122,655	121,076
Basic earnings per common share (usd per share)	$ 0.01	$ 0.00	$ 0.03	$ (0.01)
Diluted earnings per common share (usd per share)	$ 0.01	$ 0.00	$ 0.03	$ (0.01)