Represents number of current and former employees provided class action notification.

No definition available.

Name:	nr_NumberOfEmployeesProvidedClassActionNotification
Namespace Prefix:	nr_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
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- Definition

The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_EscrowDeposit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

+ Details

Name:	us-gaap_LossContingencyNewClaimsFiledNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingencyNumberOfPlaintiffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

+ Details

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_CounterpartyNameAxis=nr_EcoservMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=nr_EnvironmentalServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=nr_Released18MonthsFromClosingDateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=nr_Released9MonthsFromClosingDateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=nr_DavidaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=nr_ChristensenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=nr_IndividualFlsaCasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 7 - Commitments and Contingencies (Details Textual) $ in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	May. 31, 2015	Mar. 31, 2015	Dec. 31, 2015 USD ($)	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2016 USD ($)	Mar. 31, 2014 USD ($)
Ecoserv [Member] \| Environmental Services [Member] \| Released 18 Months from Closing Date [Member]
Escrow Deposit						$ 4
Ecoserv [Member] \| Environmental Services [Member] \| Released 9 Months from Closing Date Member
Escrow Deposit						4
Ecoserv [Member] \| Environmental Services [Member]
Escrow Deposit						$ 8	$ 8
Davida [Member]
Number of Employees Provided Class Action Notification					658
Loss Contingency, Number of Plaintiffs	91
Christensen [Member]
Loss Contingency, Number of Plaintiffs				5
Loss Contingency, New Claims Filed, Number		2
Loss Contingency, Pending Claims, Number		8
Individual FLSA Cases [Member]
Loss Contingency, New Claims Filed, Number			2
Litigation Settlement, Amount			$ 5