Earnings per Share Earnings per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								9 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Sep. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Loss per Share [Abstract]
Net income (loss)										$ 13,347	$ (33,877)	$ (26,269)
Interest on 3.25% convertible senior subordinated notes due 2017										0	0	0
Net income (loss) available to common shareholders										$ 13,347	$ (33,877)	$ (26,269)
Basic Weighted Average Shares Outstanding	21,545	19,434	18,833	18,772	18,736	18,728	18,711	18,615	18,698	19,651	18,698	18,523
Stock option awards										92	0	0
Deferred compensation awards										148	0	0
3.25% convertible senior subordinated notes due 2017										0	0	0
Diluted Weighted Average Shares Outstanding	21,961	20,273	19,031	18,772	18,736	18,728	18,711	18,615	18,698	19,891	18,698	18,523
Earnings Per Share, Basic	$ 0.23	$ 0.43	$ 0.17	$ (0.17)	$ (0.16)	$ (0.25)	$ (0.49)	$ (0.92)	$ (1.81)	$ 0.68	$ (1.81)	$ (1.42)
Earnings Per Share, Diluted	$ 0.23	$ 0.42	$ 0.17	$ (0.17)	$ (0.16)	$ (0.25)	$ (0.49)	$ (0.92)	$ (1.81)	$ 0.67	$ (1.81)	$ (1.42)
Anti-dilutive stock equivalent awards not included in the calculation of diluted loss per share										1,538	2,170	2,070