Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ 75,588	$ (100,521)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	119,785	105,717
Amortization of debt discount and issuance costs	10,202	9,687
Non-cash employee stock compensation expense	6,758	7,789
Impairments of stream and royalty interests and royalty receivables		98,588
Tax (benefit) expense of stock-based compensation exercises	(38)	247
Deferred tax benefit	(6,266)	(17,246)
Other	(4,638)	(1,065)
Changes in assets and liabilities:
Royalty receivables	(4,801)	14,976
Stream inventory	2,865	(3,115)
Income taxes receivable	(6,539)	(2,996)
Prepaid expenses and other assets	(743)	85
Accounts payable	(1,641)	(1,533)
Uncertain tax positions	7,341	1,950
Other liabilities	3,021	8,084
Net cash provided by operating activities	200,894	120,647
Cash flows from investing activities:
Acquisition of stream and royalty interests	(203,721)	(1,326,256)
Andacollo royalty termination		345,000
Golden Star term loan		(20,000)
Proceeds from sale of available-for-sale securities		6,933
Other	1,503	(302)
Net cash used in investing activities	(202,218)	(994,625)
Cash flows from financing activities:
Borrowings from revolving credit facility	70,000	350,000
Repayment of revolving credit facility	(45,000)	(50,000)
Net payments from issuance of common stock	(2,618)	(174)
Common stock dividends	(45,715)	(43,709)
Purchase of additional royalty interest from non-controlling interest	(1,462)
Tax (benefit) expense of stock-based compensation exercises	38	(247)
Other	(2,462)	(1,878)
Net cash (used in) provided by financing activities	(27,219)	253,992
Net decrease in cash and equivalents	(28,543)	(619,986)
Cash and equivalents at beginning of period	116,633	742,849
Cash and equivalents at end of period	$ 88,090	$ 122,863