ACCOUNTING POLICIES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2006	Dec. 28, 2006
Accounting Policies [Abstract]
Revenue recognition, percentage of revenue subject to guidance in ASC 605-15 and 605-20, minimum	80.00%
Revenue recognition, percentage of revenue subject to guidance in ASC 605-15 and 605-20, maximum	90.00%
Percentage of revenue associated with claims and unpriced change orders	0.50%
Sell and lease back of real estate properties			$ 10,250
Amount of the sale price in excess of book value				4,242
Impairment loss on goodwill	$ 73,528	[1]
Lease term of property			18 years

[1] During the fourth quarter of 2013, the Company performed its annual impairment analysis of goodwill. As a result of this analysis, the goodwill related to the Valent acquisition was deemed impaired, and a $73,528 impairment charge was recorded in the Consolidated Statements of Operations for the year ended December 31, 2013.