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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

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Percentage employer matches of the employee's percentage contribution matched.

No definition available.

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Percentage of employer's matching contributions to a defined contribution plan that vests in a given year.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage
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- References

No definition available.

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Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585

Name:	us-gaap_PensionContributions
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Data Type:	xbrli:monetaryItemType
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Amount of risk reinsured in excess of stated retention per company policy.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Carrying value as of the balance sheet date of obligations and payables pertaining to claims incurred of a workers compensation nature. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Data Type:	xbrli:monetaryItemType
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Accrued General Insurance.

No definition available.

Name:	wttr_AccruedGeneralInsurance
Namespace Prefix:	wttr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Accrued Health Insurance.

No definition available.

Name:	wttr_AccruedHealthInsurance
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Carrying amount of self insurance reserve for general liability insurance per occurrence to cover the deductible.

No definition available.

Name:	wttr_SelfInsuranceGeneralLiabilityReservePerOccurrenceTowardsDeductible
Namespace Prefix:	wttr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Carrying amount of self insurance reserve for vehicle liability insurance per occurrence to cover the deductible.

No definition available.

Name:	wttr_SelfInsuranceHealthLiabilityReservePerOccurrenceTowardsDeductible
Namespace Prefix:	wttr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Carrying amount of self insurance reserve for vehicle liability insurance per occurrence to cover the deductible.

No definition available.

Name:	wttr_SelfInsuranceVehicleLiabilityReservePerOccurrenceTowardsDeductible
Namespace Prefix:	wttr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Self Insurance Workers Compensation And Employers Liability Reserve Per Occurrence Towards Deductible

No definition available.

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Namespace Prefix:	wttr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of estimated exposure for worker's compensation claims.

No definition available.

Name:	wttr_WorkersCompensationClaimsEstimatedExposureAmount
Namespace Prefix:	wttr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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Balance Type:
Period Type:

Name:	srt_StatementScenarioAxis=wttr_SecondYearVestingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_StatementScenarioAxis=wttr_ThirdYearVestingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_StatementScenarioAxis=wttr_FourthYearVestingMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	srt_RangeAxis=srt_MinimumMember
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