CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CONSOLIDATED STATEMENTS OF INCOME
Revenue	$ 3,106,329	$ 2,939,478	$ 2,379,995
Cost of revenue	2,775,403	2,613,741	2,101,561
Gross profit	330,926	325,737	278,434
Selling, general and administrative expenses	190,051	182,006	170,372
Merger and related costs		13,260	1,774
Operating income	140,875	130,471	106,288
Other income (expense):
Investment income			5,817
Foreign exchange (loss) gain	(690)	688	253
Other income (expense), net	(3,134)	(808)	484
Interest income	955	1,753	587
Interest expense	(20,097)	(18,746)	(8,146)
Income before provision for income taxes	117,909	113,358	105,283
Provision for income taxes	(33,812)	(25,765)	(28,433)
Net income	84,097	87,593	76,850
Less net income attributable to noncontrolling interests	(1,770)	(10,132)	(4,496)
Net income attributable to Primoris	$ 82,327	$ 77,461	$ 72,354
Dividends per common share (in dollars per share)	$ 0.240	$ 0.240	$ 0.225
Earnings per share:
Basic (in dollars per share)	1.62	1.51	1.41
Diluted (in dollars per share)	$ 1.61	$ 1.50	$ 1.40
Weighted average common shares outstanding:
Basic (in shares)	50,784	51,350	51,481
Diluted (in shares)	51,084	51,670	51,741