Investments (Tables)

6 Months Ended

Jun. 30, 2021

Investment in Marketable Securities [Abstract]

Investments

The Company makes strategic investments in equity securities of silver and gold exploration, development and royalty and streaming companies.

	At June 30, 2021
In thousands	Cost		Gross Unrealized Losses		Gross Unrealized Gains		Estimated Fair Value
Equity Securities
Victoria Gold Corp.	$	128,710	$	—	$	36,033	164,743
Integra Resources Corp.	8,376		—		1,249		9,625
Other	2		—		—		2
Equity securities	$	137,088	$	—	$	37,282	$	174,370

	At December 31, 2020
In thousands	Cost		Gross Unrealized Losses		Gross Unrealized Gains		Estimated Fair Value
Equity Securities
Metalla Royalty & Streaming Ltd.	$	166	$	—	$	875	$	1,041
Integra Resources Corp.	7,500		—		4,401		11,901
Other	2		(1)		—		1
Equity securities	$	7,668	$	(1)	$	5,276	$	12,943