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Estimated Useful Life (Details) | 12 Months Ended
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Dec. 31, 2017
Building and improvements |
Property, Plant and Equipment, Estimated Useful Lives | 35 years
Office furnishings, leasehold improvements, computer equipment and computer software |
Property, Plant and Equipment, Estimated Useful Lives | 3-7 years
Transportation and construction equipment |
Property, Plant and Equipment, Estimated Useful Lives | 5-25 years

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- Definition Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 35 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68071081&loc=d3e1205-110223 + Details
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- Details
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- Details
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- Details
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