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COMMITMENTS AND CONTINGENCIES (Details) | 6 Months Ended
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Jun. 30, 2019
COMMITMENTS AND CONTINGENCIES |
Percentage of vehicles in which certain employees at some of the facilities altered emissions controls systems | 4.00%

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the percentage of vehicles in which certain employees at some of the facilities altered emissions controls systems. + References No definition available. + Details
Name: | wttr_LossContingencyPercentageOfVehiclesInWhichControlSystemsAreAltered
Namespace Prefix: | wttr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration