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, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Revenues	$ 1,084,510	$ 1,053,065	$ 2,039,743	$ 2,045,993
Cost of Operations	954,979	947,110	1,804,865	1,839,681
Gross profit	129,531	105,955	234,878	206,312
General and Administrative Expenses	64,088	66,481	127,938	130,759
INCOME FROM CONSTRUCTION OPERATIONS	65,443	39,474	106,940	75,553
Other (Expense) Income, net	(6,974)	(3,234)	(10,347)	(4,061)
Interest Expense	(10,857)	(11,083)	(21,688)	(22,419)
Income before income taxes	47,612	25,157	74,905	49,073
Credit (Provision) for Income Taxes	(19,067)	(9,679)	(30,421)	(18,795)
NET INCOME	28,545	15,478	44,484	30,278
Other Comprehensive Income:
Foreign currency translation	347	(43)	61	(229)
Change in fair value of investments	(7)	(352)	174	(251)
Change in fair value of interest rate swap	76	292	157	460
NET OTHER COMPREHENSIVE INCOME (LOSS)	416	(103)	392	(20)
TOTAL COMPREHENSIVE INCOME	28,961	15,375	44,876	30,258
Eliminations
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Revenues	(41,580)	(36,801)	(76,830)	(105,063)
Cost of Operations	(41,580)	(36,801)	(76,830)	(105,063)
Equity in Earnings of Subsidiaries	(31,748)	(24,440)	(47,029)	(48,796)
Income before income taxes	(31,748)	(24,440)	(47,029)	(48,796)
NET INCOME	(31,748)	(24,440)	(47,029)	(48,796)
Other Comprehensive Income:
Other Comprehensive Income of Subsidiaries	(340)	395	(235)	480
NET OTHER COMPREHENSIVE INCOME (LOSS)	(340)	395	(235)	480
TOTAL COMPREHENSIVE INCOME	(32,088)	(24,045)	(47,264)	(48,316)
Tutor Perini Corporation | Reportable legal entity
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Revenues	207,944	141,795	434,791	281,572
Cost of Operations	177,877	122,423	371,691	247,512
Gross profit	30,067	19,372	63,100	34,060
General and Administrative Expenses	18,985	19,328	36,780	38,105
INCOME FROM CONSTRUCTION OPERATIONS	11,082	44	26,320	(4,045)
Equity in Earnings of Subsidiaries	31,748	24,440	47,029	48,796
Other (Expense) Income, net	(6,684)	(4,314)	(10,779)	(5,123)
Interest Expense	(9,809)	(10,300)	(19,826)	(20,845)
Income before income taxes	26,337	9,870	42,744	18,783
Credit (Provision) for Income Taxes	2,208	5,608	1,740	11,495
NET INCOME	28,545	15,478	44,484	30,278
Other Comprehensive Income:
Other Comprehensive Income of Subsidiaries	340	(395)	235	(480)
Change in fair value of interest rate swap	76	292	157	460
NET OTHER COMPREHENSIVE INCOME (LOSS)	416	(103)	392	(20)
TOTAL COMPREHENSIVE INCOME	28,961	15,375	44,876	30,258
Guarantor Subsidiaries | Reportable legal entity
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Revenues	918,146	948,071	1,681,782	1,869,484
Cost of Operations	827,097	865,284	1,525,005	1,705,104
Gross profit	91,049	82,787	156,777	164,380
General and Administrative Expenses	44,625	46,677	90,245	91,708
INCOME FROM CONSTRUCTION OPERATIONS	46,424	36,110	66,532	72,672
Other (Expense) Income, net	(418)	955	184	811
Interest Expense	(1,048)	(783)	(1,862)	(1,574)
Income before income taxes	44,958	36,282	64,854	71,909
Credit (Provision) for Income Taxes	(18,062)	(13,961)	(26,339)	(27,541)
NET INCOME	26,896	22,321	38,515	44,368
Other Comprehensive Income:
Foreign currency translation	347	(43)	61	(229)
Change in fair value of investments	(7)	(352)	174	(251)
NET OTHER COMPREHENSIVE INCOME (LOSS)	340	(395)	235	(480)
TOTAL COMPREHENSIVE INCOME	27,236	21,926	38,750	43,888
Non-Guarantor Subsidiaries | Reportable legal entity
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Cost of Operations	(8,415)	(3,796)	(15,001)	(7,872)
Gross profit	8,415	3,796	15,001	7,872
General and Administrative Expenses	478	476	913	946
INCOME FROM CONSTRUCTION OPERATIONS	7,937	3,320	14,088	6,926
Other (Expense) Income, net	128	125	248	251
Income before income taxes	8,065	3,445	14,336	7,177
Credit (Provision) for Income Taxes	(3,213)	(1,326)	(5,822)	(2,749)
NET INCOME	4,852	2,119	8,514	4,428
Other Comprehensive Income:
TOTAL COMPREHENSIVE INCOME	$ 4,852	$ 2,119	$ 8,514	$ 4,428