Contracts in Progress (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Contractors [Abstract]
orn CostsincurredonCompleted contracts	$ 300,000
Costs incurred on uncompleted contracts	377,370,000	343,524,000
Estimated earnings	73,858,000	64,358,000
Costs incurred and estimated earnings on uncompleted contracts	451,228,000	407,882,000
Less: Billings to date	(440,725,000)	(405,006,000)
Costs and estimated earnings in excess of billings on uncompleted contracts, net	10,503,000	2,876,000
Costs and estimated earnings in excess of billings on uncompleted contracts	25,146,000	19,245,000
Billings in excess of costs and estimated earnings on uncompleted contracts	$ (14,643,000)	$ (16,369,000)