Other, Net (Tables)

12 Months Ended

Dec. 31, 2017

Other Income and Expenses [Abstract]

Schedule of Other Nonoperating Income (Expense)

Other, net consists of the following:

	Year ended December 31,
In thousands	2017			2016			2015
Foreign exchange gain (loss)	$	1,281		$	(11,456	)	$	(16,021	)
Gain (loss) on sale of assets and investments	(1,037		)	11,334			(352		)
Gain on sale of the Joaquin project	21,138			—			—
Gain on repurchase of the Rochester royalty obligation	2,332			—			—
Gain on sale of Endeavor stream and other royalties	1,036			—			—
Impairment of equity securities	(426		)	(703		)	(2,346		)
Other	2,319			923			1,052
Other, net	$	26,643		$	98		$	(17,667	)