CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
REVENUE	$ 1,120,085	$ 1,247,274	$ 2,148,241	$ 2,364,635
COST OF OPERATIONS	(1,001,445)	(1,144,436)	(1,962,533)	(2,159,078)
GROSS PROFIT	118,640	102,838	185,708	205,557
General and administrative expenses	(63,825)	(68,793)	(131,818)	(134,495)
INCOME FROM CONSTRUCTION OPERATIONS	54,815	34,045	53,890	71,062
Other income, net	1,050	40,990	1,830	41,406
Interest expense	(15,998)	(22,519)	(31,063)	(38,083)
INCOME BEFORE INCOME TAXES	39,867	52,516	24,657	74,385
Provision for income taxes	(11,971)	(19,883)	(7,703)	(27,988)
NET INCOME	27,896	32,633	16,954	46,397
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	3,013	2,537	4,195	2,537
NET INCOME ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ 24,883	$ 30,096	$ 12,759	$ 43,860
BASIC EARNINGS PER COMMON SHARE	$ 0.50	$ 0.61	$ 0.26	$ 0.89
DILUTED EARNINGS PER COMMON SHARE	$ 0.49	$ 0.59	$ 0.25	$ 0.86
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING:
BASIC (in shares)	49,946	49,735	49,880	49,510
DILUTED (in shares)	50,440	50,755	50,127	50,853