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Related Party Transactions | 9 Months Ended
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Sep. 30, 2018
Related Party Transactions [Abstract] |
Related Party Transactions | (16) Related Party Transactions ﻿ 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. Currently, the Company has a 75% interest in a joint venture with O&G (as the 25% interest holder) to construct the Purple Line Section 2 Extension project in Los Angeles, California. O&G may provide equipment and services to these joint ventures on customary trade terms; there were no material payments made by the joint venture to O&G during the three and nine months ended September 30, 2018 and 2017.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -URI http://asc.fasb.org/topic&trid=2122745 + Details
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