Prepaid Interest Released

No definition available.

Name:	rba_PrepaidInterestReleased
Namespace Prefix:	rba_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
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+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Balance Type:	na
Period Type:	duration

- Definition

Amount of interest payable on debt, including, but not limited to, trade payables.

+ References

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+ Details

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

- Definition

Amount of asset related to consideration paid in advance for interest that provides economic benefits within a future period of one year or the normal operating cycle, if longer.

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+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=rba_FivePointThreeSevenFivePercentSeniorUnsecuredNoteDueJanuary2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Period Type:

Supplemental Cash Flow Information (Narrative) (Details) - USD ($)			6 Months Ended
	May 31, 2017	Dec. 21, 2016	Jun. 30, 2017	Jul. 15, 2017	Dec. 31, 2016
Prepaid interest		$ 7,540,000	$ 6,719,000
Prepaid interest released	$ 14,259,000
5.375% Senior Unsecured Note, Due January 2025 [Member]
Principal amount		$ 500,000,000	$ 500,000,000
Interest rate		5.375%	5.375%		5.375%
Maturity date		Jan. 15, 2025	Jan. 15, 2025
Subsequent Event [Member]
Interest payable				$ 15,229,000