Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2011
Related Party Transactions [Abstract]
Related Party Transactions	[14] Related Party Transactions The Company leases certain facilities from Ronald N. Tutor, the Company's chairman and chief executive officer, and an affiliate owned by Mr. Tutor under non-cancelable operating lease agreements with monthly payments of $0.2 million, which increase at 3% per annum beginning August 1, 2009 and expire on July 31, 2016. Lease expense for these leases, recorded on a straight-line basis, was $2.3 million for each of the years ended December 31, 2011, 2010 and 2009. The Vice Chairman of O&G Industries, Inc. (“O&G”) is a director of the Company. O&G occasionally participates in joint ventures with the Company. The Company's share of revenues related to these joint ventures amounted to $5.5 million (or less than 1%) and $1.2 million (or less than 1%) of the Company's consolidated revenues in 2009. No revenues were earned from such joint ventures during 2010. As of December 31, 2011, the Company has a 30% interest in a joint venture with O&G as the sponsor for a highway reconstruction project with an estimated total contract value of approximately $357 million. The Company's participation in this joint venture was reviewed and approved by the Audit Committee of the Board of Directors of the Company in accordance with the Company's policy. The cumulative holdings of O&G as of December 31, 2011, 2010 and 2009 was 600,000 shares, or 1.27% of total common shares outstanding at December 31, 2011. On May 28, 2009, the Board of Directors of the Company approved a one-time cash payment of $3 million to Mr. Tutor, for his agreement to personally guarantee certain surety bond obligations related to a significant construction project awarded to the Company in July 2008. The Company made the payment in June 2009. Mr. Tutor was required by the surety companies to enter into this guaranty for the benefit of the Company in connection with the award of the project. Mr. Tutor has agreed to remain as guarantor until the project is completed. In determining the appropriate fee to pay Mr. Tutor for this guaranty, the Board of Directors considered information about market rates for third-party guaranty fees.

The entire disclosure for related party transactions, including the nature of the relationship(s), a description of the transactions, the amount of the transactions, the effects of any change in the method of establishing the terms of the transaction from the previous period, stated interest rate, expiration date, terms and manner of settlement per the agreement with the related party, and amounts due to or from related parties. If the entity and one or more other entities are under common ownership or management control and this control affects the operating results or financial position, disclosure includes the nature of the control relationship even if there are no transactions between the entities. Disclosure may also include the aggregate amount of current and deferred tax expense for each statement of earnings presented where the entity is a member of a group that files a consolidated tax return, the amount of any tax related balances due to or from affiliates as of the date of each statement of financial position presented, the principal provisions of the method by which the consolidated amount of current and deferred tax expense is allocated to the members of the group and the nature and effect of any changes in that method. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

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