CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
REVENUE	$ 4,757,208	$ 4,973,076	$ 4,920,472
COST OF OPERATIONS	(4,302,803)	(4,515,886)	(4,564,219)
GROSS PROFIT	454,405	457,190	356,253
General and administrative expenses	(274,928)	(255,270)	(250,840)
INCOME FROM CONSTRUCTION OPERATIONS	179,477	201,920	105,413
Other income, net	43,882	6,977	13,569
Interest expense	(69,384)	(59,782)	(45,143)
INCOME BEFORE INCOME TAXES	153,975	149,115	73,839
Income tax benefit (provision)	569	(53,293)	(28,547)
NET INCOME	154,544	95,822	45,292
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(6,162)
NET INCOME ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ 148,382	$ 95,822	$ 45,292
BASIC EARNINGS PER COMMON SHARE	$ 2.99	$ 1.95	$ 0.92
DILUTED EARNINGS PER COMMON SHARE	$ 2.92	$ 1.92	$ 0.91
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING:
BASIC	49,647	49,150	48,981
DILUTED	50,759	49,864	49,666