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Backlog | 6 Months Ended
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Jun. 30, 2018
Backlog [Abstract] |
Backlog Disclosure [Text Block] | Note 16 – Backlog At June 30, 2018 and December 31, 2017, the Company’s contractual Construction backlog, which represents the amount of revenue the Company expects to realize from work to be performed on uncompleted construction contracts in progress, was $445.3 million and $426.7 million, respectively. In addition, Service backlog as of June 30, 2018 and December 31, 2017 was $47.2 million and $34.7 million, respectively.

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