Mergers and Acquisitions (Tables)

12 Months Ended

Dec. 31, 2013

Acquisitions Material in the Aggregate

Business Acquisition

Unaudited Pro Forma Summary Financial Information

Pro Forma (unaudited)	Year ended
(in thousands, except per share data)	December 31, 2011
Revenues	$	3,894,867
Income from Construction Operations	$	178,631
Net Income	$	88,123
Basic earnings per common share	$	1.87
Diluted earnings per common share	$	1.84

GreenStar Services Corporation

Business Acquisition

Unaudited Pro Forma Summary Financial Information

Pro Forma (unaudited)	Year ended
(in thousands, except per share data)	December 31, 2011
Revenues	$	4,068,804
Income from Construction Operations	$	207,579
Net Income	$	108,712
Basic earnings per common share	$	2.30
Diluted earnings per common share	$	2.27

Lunda Construction Company

Business Acquisition

Unaudited Pro Forma Summary Financial Information

Pro Forma (unaudited)	Year ended
(in thousands, except per share data)	December 31, 2011
Revenues	$	3,872,694
Income from Construction Operations	$	191,565
Net Income	$	98,270
Basic earnings per common share	$	2.08
Diluted earnings per common share	$	2.05