Represents accrued liabilities for unsecured portion of claims.

No definition available.

Name:	nr_AccruedLiabilitiesForUnsecuredPortionOfClaims
Namespace Prefix:	nr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents guarantee obligations due to closure of bonds.

+ References

No definition available.

+ Details

Name:	nr_GuaranteeObligationsDueToClosureOfBonds
Namespace Prefix:	nr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The recovery period that could be expected to result from a third party such as an insurer.

+ References

No definition available.

+ Details

Name:	nr_LossContingencyExpectedEstimatedClaimsRepaymentPeriod
Namespace Prefix:	nr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	nr_Note15CommitmentsandContingenciesDetailsLineItems
Namespace Prefix:	nr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents operating lease term.

+ References

No definition available.

+ Details

Name:	nr_OperatingLeaseTerm
Namespace Prefix:	nr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents threshold for claims to be insured by third party insurers.

+ References

No definition available.

+ Details

Name:	nr_ThresholdForClaimsToBeInsuredByThirdPartyInsurers
Namespace Prefix:	nr_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Asset Retirement Obligation

-URI http://asc.fasb.org/extlink&oid=6505190

+ Details

Name:	us-gaap_AssetRetirementObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of payments to settle claims incurred in prior periods and related claims settlement costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437

+ Details

Name:	us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

- Details

Name:	us-gaap_OtherCommitmentsAxis=nr_LettersOfCreditInFavorOfInsuranceCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

Note 15 - Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 15 - Commitments and Contingencies (Details) [Line Items]
Operating Leases, Rent Expense	$ 25,500,000us-gaap_LeaseAndRentalExpense	$ 24,500,000us-gaap_LeaseAndRentalExpense	$ 21,300,000us-gaap_LeaseAndRentalExpense
Guarantee Obligations Due to Closure of Bonds	400,000	9,900,000
Asset Retirement Obligation	600,000us-gaap_AssetRetirementObligation	3,300,000us-gaap_AssetRetirementObligation
Letters of Credit in Favor of Insurance Company [Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
Other Commitment	3,500,000	4,000,000
Health Claims[Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
Threshold For Claims to BeInsured By Third Party Insurers	225,000
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years	1,800,000	1,200,000
Loss Contingency Expected Estimated Claims Repayment Period	6 months
Workers Compensation Auto and General Liability Claims [Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
Threshold For Claims to BeInsured By Third Party Insurers	750,000
Accrued Liabilities for Unsecured Portion of Claims	2,400,000	2,500,000
Minimum [Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
OperatingLeaseTerm	1 year
Maximum [Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
OperatingLeaseTerm	11 years
Environmental Services [Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
Guarantee Obligations Due to Closure of Bonds		9,300,000
Asset Retirement Obligation		$ 2,900,000