Business Combinations (Tables)

9 Months Ended

Sep. 30, 2013

Business Combinations

Summary of the cash paid for acquisitions

	Nine Months ended September 30,
	2013		2012
Sprint — Purchased March 12, 2012	$	—	$	21,197
Silva — purchased May 30, 2012	—		13,934
Saxon — purchased September 28, 2012	—		2,979
FSSI — purchased March 11, 2013	1,675		—
Additional cash paid August 2013 — Q3C — purchased November 17, 2012	598		—
	$	2,273	$	38,110

Schedule of pro forma results

	Three months ended September 30,				Nine months ended September 30,
	2013		2012		2013		2012
Revenues	551,333		476,570		1,409,140		1,192,167
Income before provision for income taxes	37,268		31,967		79,283		65,395
Net income attributable to Primoris	21,845		19,379		47,109		39,848
Weighted average common shares outstanding:
Basic	51,568		51,427		51,530		51,433
Diluted	51,671		51,433		51,594		51,448
Earnings per share:
Basic	$	0.42	$	0.38	$	0.91	$	0.77
Diluted	$	0.42	$	0.38	$	0.91	$	0.77