Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	JDS Silver [Member]	JDS Silver [Member] Common Stock	JDS Silver [Member] Additional Paid-In Capital	Paramount Gold and Silver Corp.	Paramount Gold and Silver Corp. Common Stock	Paramount Gold and Silver Corp. Additional Paid-In Capital
Balances at Dec. 31, 2014	$ 554,328	$ 1,034	$ 2,789,695	$ (2,233,593)	$ (2,808)
Balances, in shares at Dec. 31, 2014		103,384
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(367,183)			(367,183)
Other comprehensive income (loss)	(914)				(914)
Stock Issued During Period, Shares, Acquisitions										32,667
Stock Issued During Period, Value, Acquisitions									$ 188,817	$ 327	$ 188,490
Stock Issued During Period, Shares, Extinguishment of Debt		14,365
Stock Issued During Period, Value, Extinguishment of Debt	38,523	$ 144	38,379
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		923
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	7,905	$ 8	7,897
Balances at Dec. 31, 2015	421,476	$ 1,513	3,024,461	(2,600,776)	(3,722)
Balances, in shares at Dec. 31, 2015		151,339
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	55,352			55,352
Other comprehensive income (loss)	1,234				1,234
Stock Issued During Period, Shares, Extinguishment of Debt		739
Stock Issued During Period, Value, Extinguishment of Debt	11,813	$ 7	11,806
Stock Issued During Period, Shares, New Issues		26,944
Stock Issued During Period, Value, New Issues	269,556	$ 270	269,286
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		1,911
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	9,056	$ 19	9,037
Balances at Dec. 31, 2016	768,487	$ 1,809	3,314,590	(2,545,424)	(2,488)
Balances, in shares at Dec. 31, 2016		180,933
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,319)			(1,319)
Other comprehensive income (loss)	5,007				5,007
Stock Issued During Period, Shares, Acquisitions							4,192
Stock Issued During Period, Value, Acquisitions						$ 36,007	$ 42	$ 35,965
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		513
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	6,795	$ 5	6,790
Balances at Dec. 31, 2017	$ 814,977	$ 1,856	$ 3,357,345	$ (2,546,743)	$ 2,519
Balances, in shares at Dec. 31, 2017		185,638