Costs and estimated earnings in excess of billings (Tables)

9 Months Ended

Sep. 30, 2013

Costs and estimated earnings in excess of billings

Costs and estimated earnings in excess of billings

	September 30,		December 31,
	2013		2012
	(in thousands)
Unbilled costs and profits incurred to date*	$	196,308	$	157,119
Unapproved change orders	144,839		141,596
Claims	197,274		166,287
	$	538,421	$	465,002