Income and Mining Taxes (Tables)

6 Months Ended

Jun. 30, 2015

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Three months ended June 30,												Six months ended June 30,
	2015						2014						2015						2014
In thousands	Income (loss) before tax			Tax (expense) benefit			Income (loss) before tax			Tax (expense) benefit			Income (loss) before tax			Tax (expense) benefit			Income (loss) before tax			Tax (expense) benefit
United States	$	(9,764	)	$	319		$	(31,370	)	$	(146	)	$	(30,471	)	$	2,204		$	(60,214	)	$	(292	)
Argentina	(656		)	(1		)	(688		)	(349		)	(1,352		)	(2		)	(2,892		)	4,083
Mexico	(5,582		)	548			(12,710		)	107			(15,255		)	(716		)	(28,716		)	3,828
Bolivia	(1,219		)	196			3,957			(2,205		)	(3,598		)	(1,211		)	8,649			(4,969		)
Other jurisdictions	284			(802		)	311			(28		)	519			(83		)	793			(582		)
	$	(16,937	)	$	260		$	(40,500	)	$	(2,621	)	$	(50,157	)	$	192		$	(82,380	)	$	2,068