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v3.25.4

LEASES - Operating Subleases (Details) $ in Thousands | Dec. 31, 2025 USD ($)
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Leases [Abstract] |
2026 | $ 2,224
2027 | 2,228
2028 | 2,247
2029 | 2,254
2030 | 2,376
Thereafter | 18,819
Total | $ 30,148

X
- Definition Lessee, Operating Sublease, Payment To Be Received, After Year Five + References No definition available. + Details
Name: | rgld_LesseeOperatingSubleasePaymentToBeReceivedAfterYearFive
Namespace Prefix: | rgld_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Lessee, Operating Sublease, Payment To Be Received, Year Five + References No definition available. + Details
Name: | rgld_LesseeOperatingSubleasePaymentToBeReceivedYearFive
Namespace Prefix: | rgld_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Lessee, Operating Sublease, Payment To Be Received, Year Four + References No definition available. + Details
Name: | rgld_LesseeOperatingSubleasePaymentToBeReceivedYearFour
Namespace Prefix: | rgld_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Lessee, Operating Sublease, Payment To Be Received, Year One + References No definition available. + Details
Name: | rgld_LesseeOperatingSubleasePaymentToBeReceivedYearOne
Namespace Prefix: | rgld_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Lessee, Operating Sublease, Payment To Be Received, Year Three + References No definition available. + Details
Name: | rgld_LesseeOperatingSubleasePaymentToBeReceivedYearThree
Namespace Prefix: | rgld_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Lessee, Operating Sublease, Payment To Be Received, Year Two + References No definition available. + Details
Name: | rgld_LesseeOperatingSubleasePaymentToBeReceivedYearTwo
Namespace Prefix: | rgld_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Lessee, Operating Sublease, Payments To Be Received + References No definition available. + Details
Name: | rgld_LesseeOperatingSubleasePaymentsToBeReceived
Namespace Prefix: | rgld_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration