Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 52,678	$ 63,472	$ 73,409
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	93,486	91,342	85,020
Recognized loss on available-for-sale securities	183	4,499	12,121
Non-cash employee stock compensation expense	5,141	2,580	5,701
Gain on distribution to non-controlling interest	(46)	(259)	(2,837)
Amortization of debt discount	10,250	9,597	9,015
Impairment of royalty and stream interests	28,339
Tax benefit of stock-based compensation exercises	(364)	(597)	(2,966)
Deferred tax benefit	(27,651)	(8,166)	(11,419)
Other			100
Changes in assets and liabilities:
Royalty receivables	8,973	3,731	3,562
Prepaid expenses and other assets	5,487	9,756	(12,300)
Accounts payable	150	1,105	113
Foreign withholding taxes payable	(2,000)	(13,319)	15,294
Income taxes receivable	(15,525)	6,183	3,127
Uncertain tax positions	1,405	(7,441)	1,697
Other liabilities	543	(2,915)	(753)
Net cash provided by operating activities	192,099	147,202	172,630
Cash flows from investing activities:
Acquisition of royalty and stream interests	(60,429)	(80,019)	(314,262)
Tulsequah stream termination	10,000
Other	(773)	(4,782)	4,820
Net cash used in investing activities	(51,202)	(84,801)	(309,442)
Cash flows from financing activities:
Net proceeds from issuance of common stock	775	1,120	473,771
Common stock dividends	(56,054)	(53,380)	(43,934)
Purchase of additional royalty interest from non-controlling interest		(11,522)
Debt issuance costs	(864)	(1,284)
Distribution to non-controlling interests	(1,805)	(2,431)	(7,412)
Tax expense of stock-based compensation exercises	364	597	2,966
Net cash (used in) provided by financing activities	(57,584)	(66,900)	425,391
Net increase (decrease) in cash and equivalents	83,313	(4,499)	288,579
Cash and equivalents at beginning of period	659,536	664,035	375,456
Cash and equivalents at end of period	$ 742,849	$ 659,536	$ 664,035