Separate Financial Information of Subsidiary Guarantors of Indebtedness (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
ASSETS
Cash and Cash Equivalents	$ 104,817	$ 146,103	$ 90,582	$ 75,452
Restricted Cash	60,158	50,504
Accounts Receivable	1,749,602	1,743,300
Costs and Estimated Earnings in Excess of Billings	840,760	831,826
Other Current Assets	58,482	66,023
Total current assets	2,813,819	2,837,756
Property and Equipment, net	462,695	477,626
Other Assets:
GOODWILL	585,006	585,006
Intangible Assets, net	92,111	92,997
OTHER ASSETS	44,852	45,235
TOTAL ASSETS	3,998,483	4,038,620
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	27,598	85,890
Accounts Payable	965,931	994,016
Billings in Excess of Costs and Estimated Earnings	288,795	331,112
Accrued Expenses and Other Current Liabilities	112,448	107,925
Total current liabilities	1,394,772	1,518,943
Long-term Debt, less current maturities	753,191	673,629
Deferred Income Taxes	130,616	131,007
Other Long-term Liabilities	159,777	162,018
Contingencies and Commitments
Stockholders' Equity	1,560,127	1,553,023
TOTAL LIABILITIES AND STOCKHOLERS' EQUITY	3,998,483	4,038,620
Eliminations [Member]
ASSETS
Accounts Receivable	(213,670)	(231,519)
Costs and Estimated Earnings in Excess of Billings	(70,656)	(67,385)
Other Current Assets	(36,118)	(56,817)
Total current assets	(320,444)	(355,721)
Intercompany Notes and Receivables	(167,761)	(242,382)
Other Assets:
Investment in Subsidiaries	(2,188,874)	(2,223,971)
OTHER ASSETS	(8,467)	(8,401)
TOTAL ASSETS	(2,685,546)	(2,830,475)
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	(65,000)	(60,000)
Accounts Payable	(206,077)	(226,249)
Billings in Excess of Costs and Estimated Earnings	(12,590)	(20,571)
Accrued Expenses and Other Current Liabilities	(36,777)	(48,901)
Total current liabilities	(320,444)	(355,721)
Long-term Debt, less current maturities	(6,060)	(5,994)
Deferred Income Taxes	(2,407)	(2,407)
Intercompany Notes and Advances Payable	(167,761)	(242,382)
Contingencies and Commitments
Stockholders' Equity	(2,188,874)	(2,223,971)
TOTAL LIABILITIES AND STOCKHOLERS' EQUITY	(2,685,546)	(2,830,475)
Tutor Perini Corporation [Member]
ASSETS
Cash and Cash Equivalents	56,767	80,829	49,726	47,196
Restricted Cash	2,017	2,016
Accounts Receivable	435,844	426,176
Costs and Estimated Earnings in Excess of Billings	145,252	140,901
Other Current Assets	43,461	76,453
Total current assets	683,341	726,375
Property and Equipment, net	62,529	74,739
Other Assets:
Investment in Subsidiaries	2,188,874	2,223,971
OTHER ASSETS	41,930	42,324
TOTAL ASSETS	2,976,674	3,067,409
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	68,655	122,166
Accounts Payable	253,609	280,342
Billings in Excess of Costs and Estimated Earnings	94,701	102,373
Accrued Expenses and Other Current Liabilities	47,246	60,227
Total current liabilities	464,211	565,108
Long-term Debt, less current maturities	699,786	614,608
Deferred Income Taxes	16,083	16,475
Other Long-term Liabilities	106,621	111,108
Intercompany Notes and Advances Payable	129,846	207,087
Contingencies and Commitments
Stockholders' Equity	1,560,127	1,553,023
TOTAL LIABILITIES AND STOCKHOLERS' EQUITY	2,976,674	3,067,409
Guarantor Subsidiaries [Member]
ASSETS
Cash and Cash Equivalents	47,765	65,079	40,151	26,892
Restricted Cash	1,840	2,211
Accounts Receivable	1,432,775	1,441,263
Costs and Estimated Earnings in Excess of Billings	766,012	758,158
Other Current Assets	44,863	38,889
Total current assets	2,293,255	2,305,600
Property and Equipment, net	396,571	399,091
Intercompany Notes and Receivables	167,761	242,382
Other Assets:
GOODWILL	585,006	585,006
Intangible Assets, net	92,111	92,997
OTHER ASSETS	8,982	8,905
TOTAL ASSETS	3,543,686	3,633,981
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Maturities of Long-term Debt	23,943	23,724
Accounts Payable	913,456	937,428
Billings in Excess of Costs and Estimated Earnings	196,933	229,746
Accrued Expenses and Other Current Liabilities	86,668	76,002
Total current liabilities	1,221,000	1,266,900
Long-term Debt, less current maturities	59,465	65,015
Deferred Income Taxes	116,940	116,939
Other Long-term Liabilities	2,442	2,415
Contingencies and Commitments
Stockholders' Equity	2,143,839	2,182,712
TOTAL LIABILITIES AND STOCKHOLERS' EQUITY	3,543,686	3,633,981
Non-Guarantor Subsidiaries [Member]
ASSETS
Cash and Cash Equivalents	285	195	$ 705	$ 1,364
Restricted Cash	56,301	46,277
Accounts Receivable	94,653	107,380
Costs and Estimated Earnings in Excess of Billings	152	152
Other Current Assets	6,276	7,498
Total current assets	157,667	161,502
Property and Equipment, net	3,595	3,796
Other Assets:
OTHER ASSETS	2,407	2,407
TOTAL ASSETS	163,669	167,705
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts Payable	4,943	2,495
Billings in Excess of Costs and Estimated Earnings	9,751	19,564
Accrued Expenses and Other Current Liabilities	15,311	20,597
Total current liabilities	30,005	42,656
Other Long-term Liabilities	50,714	48,495
Intercompany Notes and Advances Payable	37,915	35,295
Contingencies and Commitments
Stockholders' Equity	45,035	41,259
TOTAL LIABILITIES AND STOCKHOLERS' EQUITY	$ 163,669	$ 167,705