Net Income (Loss) per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Net Income (Loss) per Share [Abstract]
Net income (loss)	$ (5,768)	[1]	$ 4,830	[1]	$ 826	[1]	$ 18,463	[1]
Less: earnings allocated to RSUs					(23)
Net income (loss) available to common shareholders	$ (5,768)				$ 803
Average number of common shares outstanding	28,772		28,607		28,766		28,580
Potential dilutive shares	538				342
Average number of diluted shares outstanding	29,310		28,838		29,108		28,851
Basic	$ (0.20)		$ 0.17		$ 0.03		$ 0.65
Diluted	$ (0.20)		$ 0.17		$ 0.03		$ 0.64

[1] There is no material difference between net income (loss) and comprehensive income (loss).