Costs Estimated Earnings and Billings on Uncompleted Contracts (Tables)

6 Months Ended

Jul. 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

The tables below set forth the aggregate amounts of costs incurred and earnings accrued on uncompleted contracts compared with the billings for those contracts through July 31, 2013 and January 31, 2013, and reconcile the net amounts of billings in excess of costs and estimated earnings to the corresponding amounts included in the condensed consolidated balance sheets at those dates.

	July 31,		January 31,
	2013		2013
Costs incurred on uncompleted contracts	$	321,895,000	$	259,390,000
Estimated accrued earnings		78,940,000		48,724,000
		400,835,000		308,114,000
Less—Billings to date		440,401,000		380,295,000
	$	39,566,000	$	72,181,000
Costs and estimated earnings in excess of billings	$	509,000	$	1,178,000
Billings in excess of costs and estimated earnings		40,075,000		73,359,000
	$	39,566,000	$	72,181,000