Contracts in Progress (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Contractors [Abstract]
Costs incurred on completed contracts	$ 100,000
Costs incurred on uncompleted contracts	509,134,000	360,678,000
Estimated earnings	83,849,000	47,208,000
Costs incurred and estimated earnings on uncompleted contracts	592,983,000	407,886,000
Less: Billings to date	(570,261,000)	(397,625,000)
Costs and estimated earnings in excess of billings on uncompleted contracts, net	22,722,000	10,261,000
Costs and estimated earnings in excess of billings on uncompleted contracts	38,671,000	24,856,000
Billings in excess of costs and estimated earnings on uncompleted contracts	$ (15,949,000)	$ (14,595,000)