Debt Instrument, Increment Amount

No definition available.

Name:	rba_DebtInstrumentIncrementAmount
Namespace Prefix:	rba_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Weighted average interest rate of short-term debt outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_ShortTermDebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=rba_CommittedRevolvingCreditFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rba_UncommittedCreditFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rba_UncommittedCreditFacilitiesMaturesNovemberTwentySeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rba_CommittedSeasonalBulgeCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rba_CommitmentLetterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=rba_BridgeLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=rba_MulticurrencyFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rba_CreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=rba_DelayedDrawFacilityMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

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

Debt (Narrative) (Details) CAD in Millions	Oct. 27, 2016 USD ($)	Sep. 30, 2016 USD ($)	Aug. 29, 2016 USD ($)	Dec. 31, 2015 CAD	Dec. 31, 2015 USD ($)
Debt [Line Items]
Short-term debt weighted average interest rate		1.60%		1.80%	1.80%
Maximum borrowing capacity		$ 359,358,000			$ 312,693,000
Committed Revolving Credit Facilities [Member]
Debt [Line Items]
Available borrowing capacity		256,801,000
Committed Revolving Credit Facilities, Matures May 2018 [Member]
Debt [Line Items]
Available borrowing capacity		168,139,000
Uncommitted Credit Facilities [Member]
Debt [Line Items]
Principal amount \| CAD				CAD 60
Available borrowing capacity		193,367,000
Uncommitted Credit Facilities, Matures November 2017 [Member]
Debt [Line Items]
Available borrowing capacity		169,106,000
Committed Seasonal Bulge Credit Facility [Member]
Debt [Line Items]
Available borrowing capacity		$ 50,000,000
Commitment Letter [Member] \| Bridge Loan Facility [Member]
Debt [Line Items]
Principal amount			$ 850,000,000
Revolving Credit Facility [Member] \| Commitment Letter [Member]
Debt [Line Items]
Principal amount			$ 150,000,000
Subsequent Event [Member] \| Multicurrency Facilities [Member] \| Credit Agreement [Member]
Debt [Line Items]
Principal amount	$ 675,000,000
Subsequent Event [Member] \| Delayed-Draw Facility [Member] \| Credit Agreement [Member]
Debt [Line Items]
Principal amount	325,000,000
Maximum [Member] \| Subsequent Event [Member] \| Multicurrency Facilities [Member] \| Credit Agreement [Member]
Debt [Line Items]
Increment amount	$ 50,000,000