Separate Financial Information of Subsidiary Guarantors of Indebtedness, Condensed Consolidating Statement of Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Revenues	$ 1,053,065	$ 985,346	$ 2,045,993	$ 1,897,880
Cost of Operations	947,110	898,285	1,839,681	1,724,660
Gross profit	105,955	87,061	206,312	173,220
General and Administrative Expenses	66,481	64,661	130,759	133,857
Goodwill and intangible asset impairment		376,574		376,574
INCOME (LOSS) FROM CONSTRUCTION OPERATIONS	39,474	(354,174)	75,553	(337,211)
Other Income (Expense), net	(3,234)	1,082	(4,061)	(1,226)
Interest Expense	(11,083)	(10,603)	(22,419)	(21,685)
Income (loss) before income taxes	25,157	(363,695)	49,073	(360,122)
(Provision) Credit for Income Taxes	(9,679)	15,272	(18,795)	10,496
NET INCOME (LOSS)	15,478	(348,423)	30,278	(349,626)
Other Comprehensive Income:
Foreign currency translation	(43)	(266)	(229)	57
Change in fair value of investments	(352)	5	(251)	207
Change in fair value of interest rate swap	292	(334)	460	(1,019)
Realized loss on sale of investments recorded in net income (loss)				2,005
NET OTHER COMPREHENSIVE INCOME (LOSS)	(103)	(595)	(20)	1,250
TOTAL COMPREHENSIVE INCOME (LOSS)	15,375	(349,018)	30,258	(348,376)
Tutor Perini Corporation
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Revenues	141,795	94,440	281,572	163,565
Cost of Operations	122,423	83,035	247,512	145,729
Gross profit	19,372	11,405	34,060	17,836
General and Administrative Expenses	19,328	16,830	38,105	35,739
INCOME (LOSS) FROM CONSTRUCTION OPERATIONS	44	(5,425)	(4,045)	(17,903)
Equity in Earnings of Subsidiaries	24,440	(339,844)	48,796	(322,312)
Other Income (Expense), net	(4,314)	535	(5,123)	(1,529)
Interest Expense	(10,300)	(9,613)	(20,845)	(19,684)
Income (loss) before income taxes	9,870	(354,347)	18,783	(361,428)
(Provision) Credit for Income Taxes	5,608	5,924	11,495	11,802
NET INCOME (LOSS)	15,478	(348,423)	30,278	(349,626)
Other Comprehensive Income:
Other Comprehensive Income of Subsidiaries	(395)	(261)	(480)	264
Change in fair value of interest rate swap	292	(334)	460	(1,019)
Realized loss on sale of investments recorded in net income (loss)				2,005
NET OTHER COMPREHENSIVE INCOME (LOSS)	(103)	(595)	(20)	1,250
TOTAL COMPREHENSIVE INCOME (LOSS)	15,375	(349,018)	30,258	(348,376)
Guarantor Subsidiaries
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Revenues	948,071	906,260	1,869,484	1,767,955
Cost of Operations	865,284	834,481	1,705,104	1,620,375
Gross profit	82,787	71,779	164,380	147,580
General and Administrative Expenses	46,677	47,330	91,708	97,048
Goodwill and intangible asset impairment		376,574		376,574
INCOME (LOSS) FROM CONSTRUCTION OPERATIONS	36,110	(352,125)	72,672	(326,042)
Other Income (Expense), net	955	331	811	(145)
Interest Expense	(783)	(990)	(1,574)	(2,001)
Income (loss) before income taxes	36,282	(352,784)	71,909	(328,188)
(Provision) Credit for Income Taxes	(13,961)	10,828	(27,541)	1,531
NET INCOME (LOSS)	22,321	(341,956)	44,368	(326,657)
Other Comprehensive Income:
Foreign currency translation	(43)	(266)	(229)	57
Change in fair value of investments	(352)	5	(251)	207
NET OTHER COMPREHENSIVE INCOME (LOSS)	(395)	(261)	(480)	264
TOTAL COMPREHENSIVE INCOME (LOSS)	21,926	(342,217)	43,888	(326,393)
Non-Guarantor Subsidiaries
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Cost of Operations	(3,796)	(3,877)	(7,872)	(7,804)
Gross profit	3,796	3,877	7,872	7,804
General and Administrative Expenses	476	501	946	1,070
INCOME (LOSS) FROM CONSTRUCTION OPERATIONS	3,320	3,376	6,926	6,734
Other Income (Expense), net	125	216	251	448
Income (loss) before income taxes	3,445	3,592	7,177	7,182
(Provision) Credit for Income Taxes	(1,326)	(1,480)	(2,749)	(2,837)
NET INCOME (LOSS)	2,119	2,112	4,428	4,345
Other Comprehensive Income:
TOTAL COMPREHENSIVE INCOME (LOSS)	2,119	2,112	4,428	4,345
Eliminations
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Revenues	(36,801)	(15,354)	(105,063)	(33,640)
Cost of Operations	(36,801)	(15,354)	(105,063)	(33,640)
Equity in Earnings of Subsidiaries	(24,440)	339,844	(48,796)	322,312
Income (loss) before income taxes	(24,440)	339,844	(48,796)	322,312
NET INCOME (LOSS)	(24,440)	339,844	(48,796)	322,312
Other Comprehensive Income:
Other Comprehensive Income of Subsidiaries	395	261	480	(264)
NET OTHER COMPREHENSIVE INCOME (LOSS)	395	261	480	(264)
TOTAL COMPREHENSIVE INCOME (LOSS)	$ (24,045)	$ 340,105	$ (48,316)	$ 322,048