TRANSITION PERIOD COMPARATIVE DATA - Cash Flow (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income and comprehensive income	$ 138,828	$ 239,942	$ 274,940	$ 302,776	$ 196,250
Adjustments to reconcile net income and comprehensive income to net cash provided by operating activities:
Depreciation, depletion and amortization	99,685	178,935	189,009	183,569	175,434
Non-cash employee stock compensation expense	3,218	8,411	6,056	5,730	9,116
Fair value changes in equity securities	1,350	1,503	(2,510)	(6,017)	(1,418)
Deferred tax (benefit) expense	2,510	(19,836)	11,371	456	(32,399)
Impairment of royalty interests		4,287		0	1,341
Other	1,090	979	1,663	971	988
Changes in assets and liabilities:
Royalty receivables	(6,846)	4,683	(9,771)	(19,552)	(6,957)
Stream inventory	6,077	(1,049)	2,292	(6,014)	(291)
Income tax receivable	(396)	1,849	4,023	(2,085)	268
Prepaid expenses and other assets	(1,374)	(3,908)	(1,956)	318	(7,828)
Accounts payable	76	211	3,862	3,237	(275)
Income tax payable	4,591	(3,005)	(4,248)	1,156	6,349
Uncertain tax positions	(910)		(13,268)	(24,518)	(11,146)
Other liabilities	884	4,343	406	1,030	11,320
Net cash provided by operating activities	248,783	417,345	461,869	407,151	340,752
Cash flows from investing activities:
Acquisition of stream and royalty interests	(281,066)	(922,155)	(400,381)	(168,147)	(155,985)
Khoemacau subordinated debt facility	(7,000)		(25,000)	(18,000)
Proceeds from sale of equity securities			8,651	8,651
Other	(64)	(721)	(241)	(541)	3,126
Net cash used in investing activities	(288,130)	(922,876)	(416,971)	(116,737)	(152,859)
Cash flows from financing activities:
Repayment of debt	(100,000)	(125,000)	(300,000)	(305,000)	(115,000)
Borrowings from revolving credit facility	100,000	700,000	100,000		200,000
Net payments from issuance of common stock	(921)	(1,447)	(971)	(1,465)	(4,180)
Common stock dividends	(39,374)	(91,925)	(78,738)	(76,099)	(71,471)
Other	(2,723)	(1,062)	(3,497)	(1,062)	2,411
Net cash provided by (used in) financing activities	(43,018)	480,566	(283,206)	(383,626)	11,760
Net decrease in cash and equivalents	(82,365)	(24,965)	(238,308)	(93,212)	199,653
Cash and equivalents at beginning of period	225,916	143,551	381,859	319,128	119,475
Cash and equivalents at end of period	$ 143,551	$ 118,586	$ 143,551	$ 225,916	$ 319,128