Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Income Statement [Abstract]
Revenue (Note 8)	$ 469,125	$ 193,436
Costs and expenses
Cost of sales (excludes depreciation, depletion and amortization)	60,337	24,506
General and administrative	17,531	11,063
Production taxes	3,291	1,761
Depreciation, depletion and amortization	90,875	32,995
Total costs and expenses	172,034	70,325
Operating income	297,091	123,111
Fair value changes in equity securities	5,950	(37)
Gain on sale of marketable securities	14,115	0
Interest and other income	3,192	2,049
Interest and other expense	(13,242)	(1,156)
Income before income taxes	307,106	123,967
Income tax expense (Note 11)	(25,398)	(10,389)
Net income	281,708	113,578
Net income attributable to non-controlling interests	(578)	(80)
Net income attributable to Royal Gold common stockholders	281,130	113,498
Adjustments to comprehensive income, net of tax:
Realized gain on available-for-sale debt securities	(993)	0
Comprehensive income	280,715	113,578
Comprehensive income attributable to non-controlling interests	(578)	(80)
Comprehensive income attributable to Royal Gold stockholders	$ 280,137	$ 113,498
Net income per share attributable to Royal Gold common stockholders:
Basic earnings per share (in dollars per share)	$ 3.31	$ 1.72
Basic weighted average shares outstanding (in shares)	84,720,260	65,705,157
Diluted earnings per share (in dollars per share)	$ 3.30	$ 1.72
Diluted weighted average shares outstanding (in shares)	85,017,635	65,791,551
Cash dividends declared per common share (in dollars per share)	$ 0.475	$ 0.45