Contingencies and Commitments (Details) (USD $)			12 Months Ended	1 Months Ended					9 Months Ended	1 Months Ended				12 Months Ended				1 Months Ended			12 Months Ended			1 Months Ended		9 Months Ended		0 Months Ended	9 Months Ended	1 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended	1 Months Ended			0 Months Ended		9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2011 Tutor-Saliba-Perini Joint Venture vs. Los Angeles MTA Matter [Member]	Jun. 30, 2014 Perini/Kiewit/Cashman Joint Venture-Central Artery/Tunnel Project Matter [Member]	Jan. 31, 2013 Perini/Kiewit/Cashman Joint Venture-Central Artery/Tunnel Project Matter [Member]	Feb. 29, 2012 Perini/Kiewit/Cashman Joint Venture-Central Artery/Tunnel Project Matter [Member]	Oct. 31, 2011 Perini/Kiewit/Cashman Joint Venture-Central Artery/Tunnel Project Matter [Member]	Dec. 31, 2010 Perini/Kiewit/Cashman Joint Venture-Central Artery/Tunnel Project Matter [Member]	Sep. 30, 2014 Perini/Kiewit/Cashman Joint Venture-Central Artery/Tunnel Project Matter [Member] item	Feb. 29, 2012 Long Island Expressway/Cross Island Parkway Matter [Member]	May 31, 2012 Long Island Expressway/Cross Island Parkway Matter [Member]	Sep. 30, 2011 Long Island Expressway/Cross Island Parkway Matter [Member]	Feb. 28, 2006 Long Island Expressway/Cross Island Parkway Matter [Member]	Dec. 31, 2009 Fontainebleau Matter [Member] item	Jul. 31, 2010 Fontainebleau Matter [Member]	May 31, 2010 Fontainebleau Matter [Member]	Jun. 30, 2009 Fontainebleau Matter [Member]	Oct. 31, 2013 MGM CityCenter Matter [Member]	Jul. 31, 2013 MGM CityCenter Matter [Member]	Mar. 31, 2005 MGM CityCenter Matter [Member] acre item	Dec. 31, 2012 MGM CityCenter Matter [Member]	Sep. 30, 2014 MGM CityCenter Matter [Member]	Jun. 30, 2014 MGM CityCenter Matter [Member]	Jun. 30, 2003 Honeywell Street/Queens Boulevard Bridges Matter [Member]	Mar. 31, 2010 Honeywell Street/Queens Boulevard Bridges Matter [Member]	Sep. 30, 2014 Westgate Planet Hollywood Matter [Member]	Jul. 31, 2014 Westgate Planet Hollywood Matter [Member]	Mar. 20, 2014 Westgate Planet Hollywood Matter [Member] TSC [Member]	Sep. 30, 2014 Westgate Planet Hollywood Matter [Member] WPH [Member]	Apr. 30, 2013 Brightwater Matter [Member]	Dec. 31, 2012 Brightwater Matter [Member]	Apr. 30, 2010 Brightwater Matter [Member]	Dec. 31, 2012 Brightwater Matter [Member]	Sep. 30, 2014 Brightwater Matter [Member]	Dec. 31, 2011 Brightwater Matter [Member]	Jun. 30, 2012 156 Stations Matter [Member]	Dec. 31, 2003 156 Stations Matter [Member] item	Feb. 28, 2013 156 Stations Matter [Member]	Aug. 30, 2014 U.S. Department of Commerce, National Oceanic and Atmospheric Administration Matter [Member]	Aug. 20, 2014 U.S. Department of Commerce, National Oceanic and Atmospheric Administration Matter [Member]	Sep. 30, 2014 U.S. Department of Commerce, National Oceanic and Atmospheric Administration Matter [Member] sqft claim
Loss Contingencies [Line Items]
Judgment in favor of TSP			$ 3,000,000
Tunnel handrail verdict against TSP			500,000
Ownership percentage in joint venture									56.00%																									20.00%
Estimated minimum costs of owner-directed changes to work									100,000,000
Number of construction experts in Disputes Review Board									3
Total number of Disputes Review Board panels									5
Total value of DRB awards issued in PKC's favor									128,000,000
Total value of binding DRB awards issued in PKC's favor									110,000,000
Amount of Third DRB awards previously awarded to PKC which have been vacated by Court								56,500,000
Amount of Fourth DRB awards that MHD moved to vacate								13,700,000
Amount of Fourth DRB awards previously awarded to PKC which have been vacated by Court							8,000,000
Interest award payment received by PKC from MHD						22,000,000
Receipt of payment for back charges and interest					14,800,000
Damages awarded to PKC which were anticipated to be paid including interest				88,700,000
Estimated value of project completed in Feb. 2006													130,000,000
Value of claim filed										53,800,000														8,800,000								74,000,000			132,000,000				2,600,000	26,800,000
Amount receivable as per final agreement												500,000
Value of cross complaint filed																													51,000,000
Value of counterclaim filed											151,000,000														74,600,000				45,000,000			75,000,000
Number of rooms in hotel/casino complex														3,800
Amount of court order in favor of plaintiff																45,000,000																						12,300,000
Amount set aside from approved sale for distribution to satisfy creditor claims															125,000,000
Estimated sustainable lien amount															350,000,000
Number of contracts in project																				19
Area allotted to the project																				66																					287,000
Estimated cost to repair facility																					21,000,000
Estimated cost to repair facility due to design defects																					15,000,000
Third party settlements attributable to alleged damages on the Harmon																		33,000,000
Amount settled with MGM																							348,000,000
Contract receivables	1,580,594,000	1,291,246,000																				160,700,000
Total outstanding liens on property, including subcontractors' liens																	44,000,000					173,700,000				23,200,000
Amount of damages paid																										600,000
Value of mechanic's lien release bond																										22,300,000
Value of supersedeas bond																											1,700,000
Total value of security																											24,000,000
Verdict awarded by jury																															155,800,000
Damages awarded																												19,700,000	3,100,000		26,300,000
Attorney's fees to be paid by VPFK																														14,700,000
Provision for contingency accrual																																	5,000,000
Number of stations for the New York City Transit Authority																																					156
Settlement on judgment																			$ 39,800,000																	$ 11,900,000
Number of claims																																									2