Long-Term Debt Obligations (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Long-Term Debt Obligations
Total debt	$ 7,400,000	$ 15,381,000
Less - current portion	(300,000)	(632,000)
Total long-term portion of debt	2,100,000	2,400,000
Other debt
Long-Term Debt Obligations
Total debt	2,400,000	2,700,000
Less - current portion	(300,000)
Total long-term portion of debt	2,100,000
Other disclosures
Weighted average interest rate (as a percent)	0.30%
Other debt | ColonialWebb
Other disclosures
Long term debt acquired related to industrial revenue bond	3,000,000
Notes to former owners
Long-Term Debt Obligations
Total debt	$ 5,000,000	$ 12,681,000
Other disclosures
Weighted average interest rate (as a percent)	3.30%