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Related Party Transactions | 12 Months Ended
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Dec. 31, 2017
Related Party Transactions [Abstract] |
Related Party Transactions | 13. Related Party Transactions ﻿ The Company leases, at market rates, certain facilities from an entity owned by Ronald N. Tutor, the Company’s Chairman and Chief Executive Officer. Under these leases, the Company paid $2.8 million in both 2017 and 2016, and $2.7 million for 2015, and recognized expense of $3.2 million in each of those same years. ﻿ Raymond R. Oneglia, Vice Chairman of O&G Industries, Inc. (“O&G”), is a director of the Company. The Company occasionally forms construction project joint ventures with O&G, in which each partner may provide services and equipment to these joint ventures on customary trade terms. During the three years ended December 31, 2017, the Company had three active joint ventures with O&G including two infrastructure projects in the northeastern United States that are both complete, and one for a project in Los Angeles, California in which the Company’s and O&G’s joint venture interests are 75% and 25%, respectively. P ayments made by these joint ventures to O&G for services and equipment during the years ended December 31, 2017, 2016 and 2015 were immaterial. ﻿ Peter Arkley, Senior Managing Director, Construction Services Group, of Alliant Insurance Services, Inc. (“Alliant”), is a director of the Company. The Company uses Alliant for various insurance-related services. The associated expenses for services provided for the years ended December 31, 2017, 2016 and 2015 were $17.6 million, $8.9 million and $9.8 million, respectively. The Company owed Alliant $0.5 million and $5.2 million as of December 31, 2017 and 2016, respectively, for services rendered.

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- Definition The entire disclosure for related party transactions. 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -URI http://asc.fasb.org/topic&trid=2122745 + Details
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