Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income	$ 63,472	$ 73,409	$ 98,309
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	91,342	85,020	75,001
Recognized loss on available-for-sale securities	4,499	12,121
Non-cash employee stock compensation expense	2,580	5,701	6,507
Gain on distribution to non-controlling interest	(259)	(2,837)	(3,725)
Amortization of debt discount	9,597	9,015
Restructuring on royalty interests			1,328
Tax benefit of stock-based compensation exercises	(597)	(2,966)	(6,348)
Deferred tax (benefit) expense	(8,166)	(11,419)	1,571
Other		100	2,117
Changes in assets and liabilities:
Royalty receivables	3,731	3,562	(5,118)
Prepaid expenses and other assets	9,756	(12,300)	88
Accounts payable	1,105	113	530
Foreign withholding taxes payable	(13,319)	15,294	19
Income taxes receivable	(6,183)	(3,127)	(7,179)
Uncertain tax positions	(7,441)	1,697	633
Other liabilities	(2,915)	(753)	(1,569)
Net cash provided by operating activities	147,202	172,630	162,164
Cash flows from investing activities:
Acquisition of royalty and stream interests	(80,019)	(314,262)	(276,683)
Other	(4,782)	4,820	5,327
Net cash used in investing activities	(84,801)	(309,442)	(271,356)
Cash flows from financing activities:
Net proceeds from issuance of common stock	1,120	473,771	271,536
Net proceeds from debt			457,023
Repayment of debt			(326,100)
Common stock dividends	(53,380)	(43,934)	(29,504)
Purchase of additional royalty interest from non-controlling interest	(11,522)
Debt issuance costs	(1,284)
Distribution to non-controlling interests	(2,431)	(7,412)	(8,810)
Tax expense of stock-based compensation exercises	597	2,966	6,348
Net cash (used in) provided by financing activities	(66,900)	425,391	370,493
Net (decrease) increase in cash and equivalents	(4,499)	288,579	261,301
Cash and equivalents at beginning of period	664,035	375,456	114,155
Cash and equivalents at end of period	$ 659,536	$ 664,035	$ 375,456