Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 46,539	$ 59,749
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	66,676	64,269
Loss on available-for-sale securities		12,121
Non-cash employee stock compensation expense	1,289	5,808
Gain on distribution to non-controlling interest	(259)	(162)
Amortization of debt discount	7,138	6,713
Tax benefit of stock-based compensation exercises	(320)	(1,214)
Deferred tax benefit	(13,002)	(5,832)
Changes in assets and liabilities:
Royalty receivables	8,175	(5,073)
Prepaid expenses and other assets	12,329	(4,223)
Accounts payable	194	(581)
Foreign withholding taxes payable	(11,533)	(20)
Income taxes receivable	(4,551)	(1,349)
Other liabilities	2,411	2,307
Net cash provided by operating activities	115,086	132,513
Cash flows from investing activities:
Acquisition of royalty and stream interests	(79,692)	(277,081)
Other	227	182
Net cash used in investing activities	(79,465)	(276,899)
Cash flows from financing activities:
Net proceeds from issuance of common stock	561	473,771
Common stock dividends	(39,706)	(30,925)
Purchase of additional royalty interest from non-controlling interest	(11,522)
Debt issuance costs	(1,284)
Distribution to non-controlling interests	(1,913)	(2,027)
Tax expense of stock-based compensation exercises	320	1,214
Net cash (used in) provided by financing activities	(53,544)	442,033
Net (decrease) increase in cash and equivalents	(17,923)	297,647
Cash and equivalents at beginning of period	664,035	375,456
Cash and equivalents at end of period	$ 646,112	$ 673,103