Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2012

Significant Accounting Policies [Abstract]

Components of costs and estimated earnings in excess of billings related to the entity's contracts and joint venture contracts

In accordance with normal practice in the construction industry, the Company includes in current assets and current liabilities amounts related to construction contracts realizable and payable over a period in excess of one year. Costs and estimated earnings in excess of billings related to the Company's contracts and joint venture contracts at September 30, 2012 and December 31, 2011, consisted of the following (in thousands):

	September 30, 2012		December 31, 2011
Unbilled costs and profits incurred to date*	$	141,980	$	107,645
Unapproved change orders		107,786		136,704
Claims		161,896		114,049
	$	411,662	$	358,398

* Represents the excess of contract costs and profits recognized to date on the percentage of completion accounting method over the amount of contract billings to date on certain contracts.