Debt (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Debt
Wells Fargo revolving credit facility	$ 36,899	$ 33,630
Other	1,007	984
Total debt	37,906	34,614
Less current maturities	36,899	33,631
Total long-term debt	$ 1,007	$ 983
Debt (Textual) [Abstract]
Average interest rate on revolving credit facility, at period end	2.70%
Average interest rate on revolving credit facility, during the period	2.80%