Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Cash flows from operating activities:
Net income and comprehensive income			$ 127,671	$ 137,308
Adjustments to reconcile net income and comprehensive income to net cash provided by operating activities:
Depreciation, depletion and amortization	$ 38,412	$ 43,989	84,741	91,976
Non-cash employee stock compensation expense			4,579	4,542
Fair value changes in equity securities	509	2,191	(291)	1,577	$ 1,503
Deferred tax benefit			(7,139)	(28,114)
Other			445	491
Changes in assets and liabilities:
Royalty receivables			12,948	17,220
Stream inventory			1,998	(1,564)
Income tax receivable			(6,536)	(2,797)
Prepaid expenses and other assets			(2,641)	(1,359)
Accounts payable			1,866	592
Income tax payable			(462)	4,976
Other liabilities			(597)	(3,519)
Net cash provided by operating activities			216,582	221,329
Cash flows from investing activities:
Acquisition of stream and royalty interests			(2,670)	(37,841)
Sale of equity securities			107
Other			(258)	(36)
Net cash used in investing activities			(2,821)	(37,877)
Cash flows from financing activities:
Repayment of debt			(175,000)
Debt issuance costs			(1,533)
Net payments from issuance of common stock			253	108
Common stock dividends			(49,271)	(45,953)
Other			(639)	(541)
Net cash used in financing activities			(226,190)	(46,386)
Net (decrease) increase in cash and equivalents			(12,429)	137,066
Cash and equivalents at beginning of period			118,586	143,551	143,551
Cash and equivalents at end of period	$ 106,157	$ 280,617	$ 106,157	$ 280,617	$ 118,586