Costs, Estimated Earnings and Billings on Uncompleted Contracts (Tables)

12 Months Ended

Jan. 31, 2013

Costs, Estimated Earnings and Billings on Uncompleted Contracts [Abstract]

Aggregate amounts of costs incurred and earnings accrued on uncompleted contracts compared with billings for contracts

	2013		2012
Costs incurred on uncompleted contracts	$	259,390,000	$	106,379,000
Estimated accrued earnings		48,724,000		12,121,000
		308,114,000		118,500,000
Less – Billings to date		380,295,000		183,723,000
Billings in excess of costs and estimated earnings on uncompleted contracts, net	$	72,181,000	$	65,223,000
Costs and estimated earnings in excess of billings	$	1,178,000	$	2,781,000
Billings in excess of costs and estimated earnings		73,359,000		68,004,000
Billings in excess of costs and estimated earnings on uncompleted contracts, net	$	72,181,000	$	65,223,000