CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CONSOLIDATED STATEMENTS OF INCOME
Revenues	$ 1,996,948	$ 1,929,415	$ 2,086,194
Cost of revenues	1,795,641	1,709,542	1,850,154
Gross profit	201,307	219,873	236,040
Selling, general and administrative expenses	140,842	151,703	132,248
Impairment of goodwill	2,716	401
Operating income	57,749	67,769	103,792
Other income (expense):
Income (loss) from non-consolidated entities			5,264
Foreign exchange gain (loss)	202	(763)	374
Other income (expense)	(315)	1,723	(757)
Interest income	149	56	88
Interest expense	(8,914)	(7,688)	(6,433)
Income before provision for income taxes	48,871	61,097	102,328
Provision for income taxes	(21,146)	(23,946)	(38,646)
Net income	27,725	37,151	63,682
Less net income attributable to noncontrolling interests	(1,002)	(279)	(526)
Net income attributable to Primoris	$ 26,723	$ 36,872	$ 63,156
Earnings per share:
Basic (in dollars per share)	$ 0.52	$ 0.71	$ 1.22
Diluted (in dollars per share)	$ 0.51	$ 0.71	$ 1.22
Weighted average common shares outstanding:
Basic (in shares)	51,762	51,647	51,607
Diluted (in shares)	51,989	51,798	51,747