Revisions in Estimates (Tables)

3 Months Ended

Mar. 31, 2014

Construction [Member]

Change in Accounting Estimate [Line Items]

Schedule of Change in Accounting Estimate

There were two revisions in estimates that individually had an impact of $1.0 million or more on gross profit for the three months ended March 31, 2014. The impact to gross profit was a $3.5 million decrease due to additional costs and lower productivity than originally anticipated. There were no revisions in estimates, either increases or decreases, that individually had an impact of $1.0 million or more on gross profit during the three months ended March 31, 2013.

Large Project Construction [Member]

Change in Accounting Estimate [Line Items]

Schedule of Change in Accounting Estimate

Decreases

	Three Months Ended March 31,
(dollars in millions)			2014		2013
Number of projects with downward estimate changes			2		2
Range of reduction in gross profit from each project, net		$	3.4 - 4.5	$	2.4 - 4.5
Decrease on project profitability		$	7.9	$	6.9

The projects are summarized as follows:

Increases

	Three Months Ended March 31,
(dollars in millions)			2014		2013
Number of projects with upward estimate changes			5		3
Range of increase in gross profit from each project, net		$	1.3 - 7.9	$	1.9 - 7.8
Increase on project profitability		$	16.1	$	16.1