Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net Income (Loss) (Numerator) [Abstract]
Net income (loss), basic											$ 10,381
Dilutive effect of stock options											0
Dilutive effect of restricted stock											0
Net income (loss), diluted											10,381
Net income (loss), basic and diluted	$ (8,551)	$ (10,500)	$ (12,263)	$ (11,258)	$ (324)	$ (11,301)	$ (10,720)	$ (13,086)	$ (42,572)	$ (35,431)	$ 10,381
Weighted Average Common Shares (Denominator) Abstract
Shares outstanding, Basic (in shares)									55,798	34,754	33,375
Dilutive effect of stock options (in shares)											66
Dilutive effect of restricted stock (in shares)											53
Shares outstanding, Diluted (in shares)									55,798	34,754	33,494
Shares outstanding, Basic and Diluted (in shares)									55,798	34,754
Per share [Abstract]
Net income (loss) per share, basic (in dollars per share)									$ (0.76)	$ (1.02)	$ 0.31
Net income (loss) per share, diluted (in dollars per share)									$ (0.76)	$ (1.02)	$ 0.31
Net income (loss) per share, basic and diluted (in dollars per share)	$ (0.14)	$ (0.17)	$ (0.24)	$ (0.22)	$ (0.01)	$ (0.33)	$ (0.32)	$ (0.39)	$ (0.76)	$ (1.02)
Anti-dilutive common shares excluded from diluted per share amounts [Abstract]
Weighted Average Number (in shares)									5,969	6,007	4,588
Options [Member]
Anti-dilutive common shares excluded from diluted per share amounts [Abstract]
Weighted Average Number (in shares)									5,969	5,947	4,543
Weighted Average Exercise Price (in dollars per share)									$ 11.54	$ 12.32	$ 14.92
Restricted stock [Member]
Anti-dilutive common shares excluded from diluted per share amounts [Abstract]
Shares of unvested restricted stock outstanding (in shares)	0				28				0	28	98
Weighted Average Number (in shares)									0	60	45