CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
REVENUE	$ 1,028,156	$ 1,117,361
COST OF OPERATIONS	(961,088)	(1,014,641)
GROSS PROFIT	67,068	102,720
General and administrative expenses	(67,993)	(65,703)
INCOME (LOSS) FROM CONSTRUCTION OPERATIONS	(925)	37,017
Other income, net	780	417
Interest expense	(15,065)	(15,564)
INCOME (LOSS) BEFORE INCOME TAXES	(15,210)	21,870
Income tax benefit (provision)	4,268	(8,106)
NET INCOME (LOSS)	(10,942)	13,764
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	1,182
NET INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ (12,124)	$ 13,764
BASIC EARNINGS (LOSS) PER COMMON SHARE (in dollars per share)	$ (0.24)	$ 0.28
DILUTED EARNINGS (LOSS) PER COMMON SHARE (in dollars per share)	$ (0.24)	$ 0.27
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING:
BASIC (in shares)	49,814	49,282
DILUTED (in shares)	49,814	50,948