Component of Net Income per Basic and Diluted Share (Details) (USD $) In Thousands, except Per 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
Earnings Per Share [Abstract]
Shares outstanding at end of period	8,654				10,204				8,654	10,204	9,479
Basic weighted average shares outstanding									9,971	9,674	9,524
Dilutive effect of stock options/restricted stock units									0	25	72
Total diluted weighted average shares outstanding									9,971	9,699	9,596
Net income (loss)	$ (1,115)	$ (42,768)	$ (2,750)	$ (1,705)	$ (1,351)	$ 1,482	$ 1,206	$ 1,498	$ (48,338)	$ 2,835	$ 7,700
Basic net income (loss) per common share	$ (0.12)	$ (4.23)	$ (0.27)	$ (0.17)	$ 0.13	$ 0.16	$ 0.12	$ 0.16	$ (4.85)	$ 0.29	$ 0.81
Diluted net income (loss) per common share	$ (0.12)	$ (4.23)	$ (0.27)	$ (0.17)	$ 0.13	$ 0.16	$ 0.12	$ 0.16	$ (4.85)	$ 0.29	$ 0.80