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REVENUE (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 100.00% | 100.00%
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage Of Company-Wide Revenue | 100.00% | 100.00%
Government [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 15.00% | 14.00%
Heavy Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 18.00% | 18.00%
Light Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 11.00% | 11.00%
Transportation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 5.00% | 5.00%
Commercial [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 13.00% | 13.00%
Retail/Wholesale [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 7.00% | 7.00%
Contractors [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 8.00% | 8.00%
Natural Resources [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 4.00% | 4.00%
Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 19.00% | 20.00%
Other Segments [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Percent of Total Company Revenue | 22.00% | 21.00%
United States [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 100.00% | 100.00%
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage Of Company-Wide Revenue | 73.00% | 73.00%
United States [Member] | Government [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 20.00% | 19.00%
United States [Member] | Heavy Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 19.00% | 19.00%
United States [Member] | Light Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 13.00% | 13.00%
United States [Member] | Transportation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 5.00% | 5.00%
United States [Member] | Commercial [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 16.00% | 16.00%
United States [Member] | Retail/Wholesale [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 8.00% | 8.00%
United States [Member] | Contractors [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 9.00% | 10.00%
United States [Member] | Natural Resources [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 3.00% | 3.00%
United States [Member] | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 7.00% | 7.00%
Canada [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 100.00% | 100.00%
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage Of Company-Wide Revenue | 5.00% | 6.00%
Canada [Member] | Government [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 5.00% | 6.00%
Canada [Member] | Heavy Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 20.00% | 20.00%
Canada [Member] | Light Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 6.00% | 6.00%
Canada [Member] | Transportation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 8.00% | 7.00%
Canada [Member] | Commercial [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 9.00% | 10.00%
Canada [Member] | Retail/Wholesale [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 4.00% | 4.00%
Canada [Member] | Contractors [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 11.00% | 11.00%
Canada [Member] | Natural Resources [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 34.00% | 33.00%
Canada [Member] | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 3.00% | 3.00%

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