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Other Non-current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Other Non-current Assets [Abstract]
Tax receivable	$ 13,419	$ 12,851

X

- Definition

Tax Receivable, Noncurrent

+ References

No definition available.

+ Details

Name:	rba_TaxReceivableNoncurrent
Namespace Prefix:	rba_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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