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Summary of Business and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Summary of Useful Lives Of Property and Equipment

The estimated useful lives for new property and equipment used for computing depreciation and amortizations are as follows:

	Years
Buildings			39
Construction equipment	5		—		15
Land improvements	5		—		15
Office furniture and fixtures	3		—		10
Leasehold improvements (or lease period, if shorter)	3		—		10
Transportation equipment	5		—		7

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- Definition

The tabular disclosure of the useful lives of property, plant and equipment owned by the company.

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No definition available.

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