Separate Financial Information of Subsidiary Guarantors of Indebtedness, Condensed Consolidating Balance Sheet (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
CONDENSED CONSOLIDATING BALANCE SHEET
Ownership interest in guarantors	100.00%
ASSETS
Cash and Cash Equivalents	$ 90,582	$ 75,452	$ 145,958	$ 135,583
Restricted Cash	49,158	45,853
Accounts Receivable	1,615,661	1,473,615
Costs and Estimated Earnings in Excess of Billings	858,356	905,175
Deferred Income Taxes	26,550	26,306
Other Current Assets	91,990	108,844
Total current assets	2,732,297	2,635,245
Property and Equipment, net	519,890	523,525
Other Assets:
GOODWILL	585,006	585,006
Intangible Assets, net	95,654	96,540
OTHER ASSETS	198,635	196,361
TOTAL ASSETS	4,131,482	4,036,677
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	99,970	88,917
Accounts Payable	1,005,906	937,464
Billings in Excess of Costs and Estimated Earnings	285,582	288,311
Accrued Expenses and Other Current Liabilities	160,964	159,016
Total current liabilities	1,552,422	1,473,708
Long-term Debt, less current maturities	725,763	728,767
Deferred Income Taxes	274,232	273,310
Other Long-term Liabilities	$ 138,734	$ 140,665
Contingencies and Commitments
Stockholders' Equity	$ 1,440,331	$ 1,420,227
TOTAL LIABILITIES AND STOCKHOLERS' EQUITY	4,131,482	4,036,677
Eliminations [Member]
ASSETS
Accounts Receivable	(168,519)	(146,745)
Costs and Estimated Earnings in Excess of Billings	(74,073)	(77,583)
Other Current Assets	1,930	(11,419)
Total current assets	(240,662)	(235,747)
Intercompany Notes and Receivables	(270,676)	(148,637)
Other Assets:
Investment in Subsidiaries	(2,122,342)	(1,962,983)
OTHER ASSETS	(5,790)	(5,723)
TOTAL ASSETS	(2,639,470)	(2,353,090)
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	(60,000)	(60,000)
Accounts Payable	(181,406)	(167,705)
Billings in Excess of Costs and Estimated Earnings	(2,081)	(5,711)
Accrued Expenses and Other Current Liabilities	2,825	(2,331)
Total current liabilities	(240,662)	(235,747)
Long-term Debt, less current maturities	(5,790)	(5,723)
Intercompany Notes and Advances Payable	$ (270,676)	$ (148,637)
Contingencies and Commitments
Stockholders' Equity	$ (2,122,342)	$ (1,962,983)
TOTAL LIABILITIES AND STOCKHOLERS' EQUITY	(2,639,470)	(2,353,090)
Tutor Perini Corporation [Member]
ASSETS
Cash and Cash Equivalents	49,726	47,196	71,938	75,087
Restricted Cash	3,260	3,369
Accounts Receivable	393,473	358,437
Costs and Estimated Earnings in Excess of Billings	115,635	114,580
Deferred Income Taxes	16,566	2,255
Other Current Assets	39,685	60,119
Total current assets	618,345	585,956
Property and Equipment, net	102,371	105,306
Other Assets:
Investment in Subsidiaries	2,122,342	1,962,983
OTHER ASSETS	92,320	58,722
TOTAL ASSETS	2,935,378	2,712,967
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	125,255	107,283
Accounts Payable	210,902	211,679
Billings in Excess of Costs and Estimated Earnings	88,888	89,303
Accrued Expenses and Other Current Liabilities	36,144	6,145
Total current liabilities	461,189	414,410
Long-term Debt, less current maturities	655,029	653,669
Deferred Income Taxes	40,066
Other Long-term Liabilities	104,897	106,588
Intercompany Notes and Advances Payable	$ 233,866	$ 118,073
Contingencies and Commitments
Stockholders' Equity	$ 1,440,331	$ 1,420,227
TOTAL LIABILITIES AND STOCKHOLERS' EQUITY	2,935,378	2,712,967
Guarantor Subsidiaries [Member]
ASSETS
Cash and Cash Equivalents	40,151	26,892	49,241	36,764
Restricted Cash	3,686	3,283
Accounts Receivable	1,300,463	1,179,919
Costs and Estimated Earnings in Excess of Billings	816,642	868,026
Deferred Income Taxes	9,984	21,356
Other Current Assets	41,897	48,482
Total current assets	2,212,823	2,147,958
Property and Equipment, net	413,513	414,143
Intercompany Notes and Receivables	270,676	148,637
Other Assets:
GOODWILL	585,006	585,006
Intangible Assets, net	95,654	96,540
OTHER ASSETS	86,370	128,094
TOTAL ASSETS	3,664,042	3,520,378
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	34,715	41,634
Accounts Payable	974,776	890,268
Billings in Excess of Costs and Estimated Earnings	198,182	203,003
Accrued Expenses and Other Current Liabilities	79,481	115,392
Total current liabilities	1,287,154	1,250,297
Long-term Debt, less current maturities	76,524	80,821
Deferred Income Taxes	211,828	273,310
Other Long-term Liabilities	$ 2,323	$ 3,278
Contingencies and Commitments
Stockholders' Equity	$ 2,086,213	$ 1,912,672
TOTAL LIABILITIES AND STOCKHOLERS' EQUITY	3,664,042	3,520,378
Non-Guarantor Subsidiaries [Member]
ASSETS
Cash and Cash Equivalents	705	1,364	$ 24,779	$ 23,732
Restricted Cash	42,212	39,201
Accounts Receivable	90,244	82,004
Costs and Estimated Earnings in Excess of Billings	152	152
Deferred Income Taxes		2,695
Other Current Assets	8,478	11,662
Total current assets	141,791	137,078
Property and Equipment, net	4,006	4,076
Other Assets:
OTHER ASSETS	25,735	15,268
TOTAL ASSETS	171,532	156,422
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts Payable	1,634	3,222
Billings in Excess of Costs and Estimated Earnings	593	1,716
Accrued Expenses and Other Current Liabilities	42,514	39,810
Total current liabilities	44,741	44,748
Deferred Income Taxes	22,338
Other Long-term Liabilities	31,514	30,799
Intercompany Notes and Advances Payable	$ 36,810	$ 30,564
Contingencies and Commitments
Stockholders' Equity	$ 36,129	$ 50,311
TOTAL LIABILITIES AND STOCKHOLERS' EQUITY	$ 171,532	$ 156,422