Separate Financial Information of Subsidiary Guarantors of Indebtedness, Condensed Consolidating Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
CONDENSED CONSOLIDATING BALANCE SHEET
Ownership interest in guarantors (as a percent)	100.00%
ASSETS
Cash and Cash Equivalents	$ 142,678	$ 168,056	$ 185,386	$ 204,240
Restricted Cash	47,019	38,717
Accounts Receivable	1,389,511	1,224,613
Costs and Estimated Earnings in Excess of Billings	504,911	465,002
Deferred Income Taxes	9,452	10,071
Other Current Assets	53,814	75,388
Total current assets	2,147,385	1,981,847
Long-term Investments	46,283	46,283
Property and Equipment, net	491,457	485,095
Other Assets
Goodwill	570,646	570,646
Intangible Assets, net	120,281	126,821
Other	81,432	85,718
Total assets	3,457,484	3,296,410
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	108,134	67,710
Accounts Payable	760,512	696,473
Billings in Excess of Costs and Estimated Earnings	306,391	301,761
Accrued Expenses and Other Current Liabilities	180,545	168,326
Total current liabilities	1,355,582	1,234,270
Long-term Debt, less current maturities	675,642	669,380
Deferred Income Taxes	109,900	109,900
Other Long-term Liabilities	135,505	138,996
Contingencies and commitments
Stockholders' Equity	1,180,855	1,143,864
Total liabilities and stockholders' equity	3,457,484	3,296,410
Tutor Perini Corporation
ASSETS
Cash and Cash Equivalents	90,096	64,663	138,340	134,936
Restricted Cash	23,441	30,236
Accounts Receivable	206,688	177,856
Costs and Estimated Earnings in Excess of Billings	86,353	111,821
Other Current Assets	64,016	26,461
Total current assets	470,594	411,037
Long-term Investments	46,283	46,283
Property and Equipment, net	78,755	64,248
Other Assets
Investment in Subsidiaries	2,107,612	2,122,116
Other	75,938	81,198
Total assets	2,779,182	2,724,882
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	45,079	42,589
Accounts Payable	127,067	97,834
Billings in Excess of Costs and Estimated Earnings	115,646	95,657
Accrued Expenses and Other Current Liabilities	71,432	30,545
Total current liabilities	359,224	266,625
Long-term Debt, less current maturities	633,116	603,371
Deferred Income Taxes	102,139	102,138
Other Long-term Liabilities	132,142	134,874
Intercompany Notes and Advances Payable	371,706	474,010
Stockholders' Equity	1,180,855	1,143,864
Total liabilities and stockholders' equity	2,779,182	2,724,882
Guarantor Subsidiaries
ASSETS
Cash and Cash Equivalents	36,766	74,385	16,425	52,492
Restricted Cash	7,869	8,481
Accounts Receivable	1,275,041	1,121,098
Costs and Estimated Earnings in Excess of Billings	444,365	377,132
Deferred Income Taxes	15,527	15,823
Other Current Assets	21,953	49,993
Total current assets	1,801,521	1,646,912
Property and Equipment, net	407,996	416,006
Intercompany Notes and Receivables	393,739	493,277
Other Assets
Goodwill	570,646	570,646
Intangible Assets, net	120,281	126,821
Investment in Subsidiaries	1	134
Other	10,541	9,058
Total assets	3,304,725	3,262,854
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	63,055	25,121
Accounts Payable	771,777	698,015
Billings in Excess of Costs and Estimated Earnings	190,711	206,070
Accrued Expenses and Other Current Liabilities	96,902	108,589
Total current liabilities	1,122,445	1,037,795
Long-term Debt, less current maturities	82,573	105,922
Deferred Income Taxes	7,761	7,762
Other Long-term Liabilities	3,363	4,122
Stockholders' Equity	2,088,583	2,107,253
Total liabilities and stockholders' equity	3,304,725	3,262,854
Non-Guarantor Subsidiaries
ASSETS
Cash and Cash Equivalents	15,816	29,008	30,621	16,812
Restricted Cash	15,709
Accounts Receivable	46,915	1,088
Costs and Estimated Earnings in Excess of Billings	152	152
Other Current Assets	2,829	2,891
Total current assets	81,421	33,139
Property and Equipment, net	4,706	4,841
Other Assets
Investment in Subsidiaries	50	50
Other		35,375
Total assets	86,177	73,405
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts Payable	54	156
Billings in Excess of Costs and Estimated Earnings	34	34
Accrued Expenses and Other Current Liabilities	44,741	38,901
Total current liabilities	44,829	39,091
Intercompany Notes and Advances Payable	21,995	19,267
Stockholders' Equity	19,353	15,047
Total liabilities and stockholders' equity	86,177	73,405
Eliminations
ASSETS
Accounts Receivable	(139,133)	(75,429)
Costs and Estimated Earnings in Excess of Billings	(25,959)	(24,103)
Deferred Income Taxes	(6,075)	(5,752)
Other Current Assets	(34,984)	(3,957)
Total current assets	(206,151)	(109,241)
Intercompany Notes and Receivables	(393,739)	(493,277)
Other Assets
Investment in Subsidiaries	(2,107,663)	(2,122,300)
Other	(5,047)	(39,913)
Total assets	(2,712,600)	(2,764,731)
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts Payable	(138,386)	(99,532)
Accrued Expenses and Other Current Liabilities	(32,530)	(9,709)
Total current liabilities	(170,916)	(109,241)
Long-term Debt, less current maturities	(40,047)	(39,913)
Intercompany Notes and Advances Payable	(393,701)	(493,277)
Stockholders' Equity	(2,107,936)	(2,122,300)
Total liabilities and stockholders' equity	$ (2,712,600)	$ (2,764,731)
7.625% Senior Notes due 2018
CONDENSED CONSOLIDATING BALANCE SHEET
Interest rate (as a percent)	7.625%