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.

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Data Type:	xbrli:stringItemType
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Period Type:	duration

- Definition

Maximum amount of potential cash payments that could result from the contingent consideration arrangement related to the acquisition of royalty interests.

+ Details

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

- Definition

The acquisition-date fair value of the equity interests of the acquirer issued or issuable in consideration for the acquisition of royalty interests.

+ Details

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

- Definition

The acquisition-date fair value of the restructuring of existing royalty interests of the acquirer as consideration for the acquisition of additional royalty interests.

+ Details

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Namespace Prefix:	rgld
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of direct costs for the acquisition of royalty interests including legal, accounting, and other costs incurred.

+ Details

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Namespace Prefix:	rgld
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The aggregate gain (loss) recognized on the restructuring of royalties arising from the difference between the book value of the royalty before the restructuring and fair value of the restructured royalties after the restructuring is complete.

+ Details

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Namespace Prefix:	rgld
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum quantity of gold that can be purchased for the specified maximum purchase price per ounce.

+ Details

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Namespace Prefix:	rgld
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum purchase price for each payable ounce of gold after threshold number of ounces have been delivered per terms of contract.

+ Details

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Namespace Prefix:	rgld
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Maximum purchase price for each payable ounce of gold until threshold number of ounces have been delivered per terms of contract.

+ Details

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Namespace Prefix:	rgld
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Aggregate additional sliding-scale royalty interests acquired by the entity using multiple payments.

+ Details

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Namespace Prefix:	rgld
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the maximum aggregate sliding-scale royalty interests owned by the entity after the acquisition of additional interests.

+ Details

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Namespace Prefix:	rgld
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of assignment of rights agreements under which the entity increased royalty interests.

+ Details

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Namespace Prefix:	rgld
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of parties with whom the entity entered into assignment of rights agreements.

+ Details

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Namespace Prefix:	rgld
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of the payable gold produced for which the entity acquired the rights.

+ Details

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Namespace Prefix:	rgld
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of royalty interests acquired by the entity.

+ Details

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Namespace Prefix:	rgld
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the threshold price of gold, above which the entities sliding-scale royalties increase.

+ Details

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Namespace Prefix:	rgld
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

The cash outflow from the purchase of royalty interests in mining properties is the amount of cash the mineral producer pays the owner of the mine or mineral resource.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 15, 17
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585

+ Details

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

- Definition

The value of all consideration given or received by the Entity in the significant acquisition or disposal.

+ Details

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

- Definition

Number of shares of stock issued during the period as part of a transaction to acquire assets that do not qualify as a business combination.

+ Details

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Namespace Prefix:	us-gaap
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Period Type:	duration

ROYALTY ACQUISITIONS (Details) (USD $)	12 Months Ended				1 Months Ended		1 Months Ended			1 Months Ended					1 Months Ended		1 Months Ended		1 Months Ended	3 Months Ended
ROYALTY ACQUISITIONS (Details) (USD $)	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009	Oct. 20, 2010 Mt. Milligan	Oct. 31, 2010 Mt. Milligan RGLD Gold AG	Oct. 20, 2010 Mt. Milligan RGLD Gold AG	Jul. 31, 2010 Pascua-Lama	Oct. 28, 2010 Pascua-Lama	Jul. 02, 2010 Pascua-Lama	Oct. 31, 2010 Pascua-Lama Gold NSR	Jul. 31, 2010 Pascua-Lama Gold NSR	Oct. 28, 2010 Pascua-Lama Gold NSR	Jul. 02, 2010 Pascua-Lama Gold NSR	Jul. 02, 2010 Pascua-Lama Copper NSR	Jan. 31, 2010 Andacollo	Jan. 25, 2010 Andacollo	Oct. 31, 2008 Barrick Gold	Oct. 02, 2008 Barrick Gold	Oct. 31, 2008 Cortez	Dec. 31, 2008 Cortez	Oct. 02, 2008 Cortez
Acquisition of Royalty Interest in Mineral Properties
Percentage of payable gold acquired (as a percent)						25.00%
Cash paid for acquisition of royalty interests	$ 280,009,000	$ 232,996,000	$ 186,110,000		$ 226,500,000		$ 53,000,000			$ 28,000,000	$ 25,000,000				$ 217,900,000		$ 150,000,000		$ 181,300,000
Maximum future additional payments upon satisfaction of certain conditions in the Purchase and Sale Agreement						85,000,000
Cash payment for each payable ounce of gold upto 550,000 ounces (in dollars per ounce)						400
Maximum quantity of gold with maximum cash payment of $400 per ounce (in ounces)						550,000
Cash payment for each payable ounce of gold after 550,000 ounces (in dollars per ounce)						450
Transaction costs				1,100,000					1,100,000							1,700,000					3,100,000
Total purchase price of royalty interests						226,500,000							53,000,000			273,000,000		181,300,000
Number of assignment of rights agreements									2
Number of private Chilean citizens with assignment of rights agreements									2
Aggregate additional NSR sliding-scale royalty acquired with two payments (as a percent)									0.75%
Aggregate percentage of maximum sliding-scale royalty interests after acquisition of additional interests (as a percent)												5.23%		1.05%
Percentage of royalty interests acquired (as a percent)												0.40%	0.35%	0.20%
Price of gold above which sliding-scale royalties reach 5.23% (in dollars per ounce)								800
Number of common shares issued for acquisition of royalty interests (in shares)															1,204,136
Value of common shares issued as purchase price																53,400,000
Value of restructuring of GSR2, GSR3 and NVR1 royalties																	31,500,000
Gain on royalty restructuring			$ 33,714,000																	$ 31,500,000