Business Acquisition - Recognized Identified Assets Acquired and Liabilities Assumed (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010	Oct. 31, 2013 West Construction, Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Fixed assets, including inventory				$ 5,936,000
Seller receivables				1,425,000
Intangible assets				702,000
Goodwill	33,798,000	33,798,000	31,149,000	2,649,000
Payable to Seller				(1,425,000)
Noncontrolling interest				(16,000)
Total recognized identifiable assets acquired, goodwill, and liabilities assumed, net				$ 9,271,000