Name:	rgld_NumberOfOtherMemberOfBoardOfDirectorsHoldingLimitedPartnerInterest
Namespace Prefix:	rgld_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Fair value of the gold in inventory held by a third party refinery for the account of a related party of the Company.

No definition available.

Name:	rgld_OtherInventoryInventoryAtOffSitePremisesFairValue
Namespace Prefix:	rgld_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Quantity of gold inventories held by a third party refinery for the account of a related party of the Company.

No definition available.

Name:	rgld_OtherInventoryInventoryAtOffSitePremisesQuantity
Namespace Prefix:	rgld_
Data Type:	num:massItemType
Balance Type:	na
Period Type:	instant

Percentage of limited partner ownership interest held by executives of a related party entity to the limited partnership.

No definition available.

Name:	rgld_OwnershipInterestHeldByExecutives
Namespace Prefix:	rgld_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Maximum number of days from the date of receipt that gold is held in inventory.

No definition available.

Name:	rgld_PeriodOfSaleOfGoldAllocated
Namespace Prefix:	rgld_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The net value royalty interest percentage owned as of the reporting date by a related party of the reporting entity.

No definition available.

Name:	rgld_RelatedPartyNetValueRoyaltyInterestPercentageOwned
Namespace Prefix:	rgld_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Gross amount of merchandise or materials to which the entity holds the title, but physically at another entity's facilities (for example, but not limited to, work in process may be temporarily at the site of a subcontractor).

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 210.5-02.6(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

-Subparagraph a

-Article 5