Separate Financial Information of Subsidiary Guarantors of Indebtedness, Condensed Consolidating Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
CONDENSED CONSOLIDATING BALANCE SHEET
Ownership interest in guarantors (as a percent)	100.00%
ASSETS
Cash and Cash Equivalents	$ 139,858	$ 119,923	$ 142,678	$ 168,056
Restricted Cash	42,627	42,594
Accounts Receivable	1,454,045	1,291,246
Costs and Estimated Earnings in Excess of Billings	660,952	573,248
Deferred Income Taxes	7,982	8,240
Other Current Assets	52,420	50,669
Total current assets	2,357,884	2,085,920
Long-term Investments		46,283
Property and Equipment, net	529,545	498,125
Other Assets:
Goodwill	585,006	577,756		1,065,741
Intangible Assets, net	106,403	113,740
Other	75,685	75,614
Total assets	3,654,523	3,397,438
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	68,232	114,658
Accounts Payable	849,628	758,225
Billings in Excess of Costs and Estimated Earnings	299,389	267,586
Accrued Expenses and Other Current Liabilities	136,774	158,017
Total current liabilities	1,354,023	1,298,486
Long-term Debt, less current maturities	761,034	619,226
Deferred Income Taxes	115,536	114,333
Other Long-term Liabilities	122,463	117,858
Contingencies and Commitments
Stockholders' Equity	1,301,467	1,247,535
Total liabilities and stockholders' equity	3,654,523	3,397,438
Eliminations
ASSETS
Accounts Receivable	(58,179)	(90,951)
Costs and Estimated Earnings in Excess of Billings	(70,474)	(32,662)
Deferred Income Taxes	(7,626)	(7,626)
Other Current Assets	(67,812)	(37,632)
Total current assets	(204,091)	(168,871)
Intercompany Notes and Receivables	(239,049)	(428,190)
Other Assets:
Investment in Subsidiaries	(2,132,735)	(2,181,359)
Other	(5,317)	(5,183)
Total assets	(2,581,192)	(2,783,603)
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts Payable	(99,847)	(88,103)
Accrued Expenses and Other Current Liabilities	(69,104)	(47,841)
Total current liabilities	(168,951)	(135,944)
Long-term Debt, less current maturities	(40,316)	(40,183)
Intercompany Notes and Advances Payable	(238,947)	(445,910)
Stockholders' Equity	(2,132,978)	(2,161,566)
Total liabilities and stockholders' equity	(2,581,192)	(2,783,603)
Tutor Perini Corporation | Reportable legal entity
ASSETS
Cash and Cash Equivalents	81,385	88,995	90,096	64,663
Restricted Cash	3,368	18,833
Accounts Receivable	300,406	208,227
Costs and Estimated Earnings in Excess of Billings	90,823	99,779
Other Current Assets	58,924	37,605
Total current assets	534,906	453,439
Long-term Investments		46,283
Property and Equipment, net	92,129	77,562
Other Assets:
Investment in Subsidiaries	2,113,166	2,181,280
Other	71,690	70,269
Total assets	2,811,891	2,828,833
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	23,082	50,578
Accounts Payable	189,131	162,292
Billings in Excess of Costs and Estimated Earnings	119,667	90,267
Accrued Expenses and Other Current Liabilities	56,161	58,232
Total current liabilities	388,041	361,369
Long-term Debt, less current maturities	683,291	575,356
Deferred Income Taxes	107,622	107,448
Other Long-term Liabilities	120,346	114,677
Intercompany Notes and Advances Payable	211,124	422,448
Stockholders' Equity	1,301,467	1,247,535
Total liabilities and stockholders' equity	2,811,891	2,828,833
Guarantor Subsidiaries | Reportable legal entity
ASSETS
Cash and Cash Equivalents	50,422	18,031	36,766	74,385
Restricted Cash	8,050	8,040
Accounts Receivable	1,160,673	1,126,012
Costs and Estimated Earnings in Excess of Billings	640,451	505,979
Deferred Income Taxes	15,608	15,866
Other Current Assets	41,108	26,234
Total current assets	1,916,312	1,700,162
Property and Equipment, net	432,981	415,993
Intercompany Notes and Receivables	239,049	428,190
Other Assets:
Goodwill	585,006	577,756
Intangible Assets, net	106,403	113,740
Investment in Subsidiaries	19,519	29
Other	9,312	10,528
Total assets	3,308,582	3,246,398
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	45,150	64,080
Accounts Payable	757,390	677,997
Billings in Excess of Costs and Estimated Earnings	179,688	177,285
Accrued Expenses and Other Current Liabilities	96,020	99,257
Total current liabilities	1,078,248	1,018,619
Long-term Debt, less current maturities	118,059	84,053
Deferred Income Taxes	7,914	6,885
Other Long-term Liabilities	2,117	3,181
Stockholders' Equity	2,102,244	2,133,660
Total liabilities and stockholders' equity	3,308,582	3,246,398
Non-Guarantor Subsidiaries | Reportable legal entity
ASSETS
Cash and Cash Equivalents	8,051	12,897	15,816	29,008
Restricted Cash	31,209	15,721
Accounts Receivable	51,145	47,958
Costs and Estimated Earnings in Excess of Billings	152	152
Other Current Assets	20,200	24,462
Total current assets	110,757	101,190
Property and Equipment, net	4,435	4,570
Other Assets:
Investment in Subsidiaries	50	50
Total assets	115,242	105,810
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts Payable	2,954	6,039
Billings in Excess of Costs and Estimated Earnings	34	34
Accrued Expenses and Other Current Liabilities	53,697	48,369
Total current liabilities	56,685	54,442
Intercompany Notes and Advances Payable	27,823	23,462
Stockholders' Equity	30,734	27,906
Total liabilities and stockholders' equity	$ 115,242	$ 105,810
7.625% Senior Notes due 2018
CONDENSED CONSOLIDATING BALANCE SHEET
Interest rate (as a percent)	7.625%