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GOODWILL AND OTHER INTANGIBLE ASSETS (Rollforward of Goodwill) (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2017 USD ($)
Goodwill [Roll Forward] |
Balance at beginning of year | $ 465,154
Increase from current period acquisitions | 8,612
Measurement period adjustments from prior period acquisitions | 2,186
Decrease from disposition of business | (1,300)
Foreign currency translation and other | 4,076
Balance at end of year | 478,728
Technical Services |
Goodwill [Roll Forward] |
Balance at beginning of year | 61,116
Increase from current period acquisitions | 0
Measurement period adjustments from prior period acquisitions | 0
Decrease from disposition of business | (1,300)
Foreign currency translation and other | 338
Balance at end of year | 60,154
Industrial and Field Services |
Goodwill [Roll Forward] |
Balance at beginning of year | 107,968
Increase from current period acquisitions | 2,999
Measurement period adjustments from prior period acquisitions | 0
Decrease from disposition of business | 0
Foreign currency translation and other | 1,398
Balance at end of year | 112,365
Safety-Kleen |
Goodwill [Roll Forward] |
Balance at beginning of year | 296,070
Increase from current period acquisitions | 5,613
Measurement period adjustments from prior period acquisitions | 2,186
Decrease from disposition of business | 0
Foreign currency translation and other | 2,340
Balance at end of year | 306,209
Oil, Gas and Lodging Services |
Goodwill [Roll Forward] |
Balance at beginning of year | 0
Increase from current period acquisitions | 0
Measurement period adjustments from prior period acquisitions | 0
Decrease from disposition of business | 0
Foreign currency translation and other | 0
Balance at end of year | $ 0

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