Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 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	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Numerator:
Net income (loss)	$ (3,619)	$ (14,312)	$ 8,339	$ 12,311	$ (18,255)	$ (496)	$ 2,106	$ 5,057	$ 2,720	$ (11,588)	$ (10,066)
Denominator:
Basic weighted average shares outstanding									16,123,592	15,388,456	15,187,028
Effect of dilutive securities:
SARS and options									406,482
Restricted stock									51,799
Convertible notes									482,983
Diluted weighted average shares outstanding									17,064,856	15,388,456	15,187,028
Basic earnings (loss) per common share	$ (0.22)	$ (0.86)	$ 0.54	$ 0.80	$ (1.18)	$ (0.03)	$ 0.14	$ 0.33	$ 0.17	$ (0.75)	$ (0.66)
Diluted earnings (loss) per common share	$ (0.22)	$ (0.86)	$ 0.48	$ 0.74	$ (1.18)	$ (0.03)	$ 0.12	$ 0.30	$ 0.16	$ (0.75)	$ (0.66)