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Commitments and Contingencies (Details 3) | 12 Months Ended
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Dec. 31, 2014
Environmental Contingencies |
Ownership interest in domestic subsidiaries (as a percent) | 100.00%rs_MajorityInterestOwnershipPercentageByParent
Employees covered by collective bargaining agreements |
Collective Bargaining Agreements |
Expiration period of collective bargaining agreements | 5 years
Total employees | Employees covered by collective bargaining agreements |
Collective Bargaining Agreements |
Percentage of employees covered by collective bargaining agreements | 11.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_NumberOfEmployeesTotalMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_UnionizedEmployeesConcentrationRiskMember
Number of collective bargaining agreements that expire at various times over the next five years | 43 rs_UmberOfCollectiveBargainingAgreementsExpiringWithinSixYears / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_NumberOfEmployeesTotalMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_UnionizedEmployeesConcentrationRiskMember
Employees covered by collective bargaining agreements that expire during 2015 | Employees covered by collective bargaining agreements |
Collective Bargaining Agreements |
Percentage of employees covered by collective bargaining agreements | 5.30%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_UnionizedEmployeesConcentrationRiskMember
Number of collective bargaining agreements that expire within one year | 17 rs_NumberOfCollectiveBargainingAgreementsExpiringWithinOneYear / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_UnionizedEmployeesConcentrationRiskMember

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- Definition Represents the expiration period of collective bargaining agreements. + References No definition available. + Details
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- Definition Represents the number of collective bargaining agreements that expire within one year. + References No definition available. + Details
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- Definition Represents the number of collective bargaining agreements that will expire at various times over the next six years. + References No definition available. + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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