XML 59 R46.htm IDEA: XBRL DOCUMENT v3.8.0.1

Summary of Business and Significant Accounting Policies - Summary of Useful Lives Used in Computing Depreciation and Amortization (Details)	12 Months Ended
	Dec. 31, 2017
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	39 years
Construction equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Construction equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	15 years
Land improvements | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Land improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	15 years
Office furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Office furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Leasehold improvements (or lease period, if shorter) | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Leasehold improvements (or lease period, if shorter) | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Transportation equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Transportation equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	7 years

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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