Costs and estimated earnings in excess of billings (Tables)

6 Months Ended

Jun. 30, 2014

Costs and estimated earnings in excess of billings

Costs and estimated earnings in excess of billings

	June 30,		December 31,
	2014		2013
	(in thousands)
Unbilled costs and profits incurred to date*	$	283,516	$	204,276
Unapproved change orders	125,018		146,787
Claims	252,418		222,185
	$	660,952	$	573,248

* 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.