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
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME (LOSS)	(48,405)			(48,405)
Other comprehensive income (loss)	26				26
Stock Issued During Period, Shares, Acquisitions							16,390
Stock Issued During Period, Value, Acquisitions						82,668	$ 163	82,505
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		1,282
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	3,246	$ 14	3,232
Balances at Dec. 31, 2018	852,512	$ 2,033	3,443,082	(2,592,544)	(59)
Balances, in shares at Dec. 31, 2018		203,310
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting standard				2,604	(2,604)
NET INCOME (LOSS)	(341,203)			(341,203)
Other comprehensive income (loss)	(77)				(77)
Stock Issued During Period, Shares, Acquisitions							953
Stock Issued During Period, Value, Acquisitions						$ 5,973	$ 8	$ 5,965
Stock Issued During Period, Shares, Extinguishment of Debt		4,453
Stock Issued During Period, Value, Extinguishment of Debt	21,291	$ 45	21,246
Stock Issued During Period, Shares, New Issues		30,850
Stock Issued During Period, Value, New Issues	122,832	$ 309	122,523
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		1,963
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	5,676	$ 20	5,656
Balances at Dec. 31, 2019	667,004	$ 2,415	$ 3,598,472	$ (2,933,747)	$ (136)
Balances, in shares at Dec. 31, 2019		241,529
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting standard	$ 65,000