XML 57 R20.htm IDEA: XBRL DOCUMENT

MINERAL PROPERTY INTERESTS AND ASSET RETIREMENT OBLIGATIONS (Tables)

6 Months Ended

Jun. 30, 2014

MINERAL PROPERTY INTERESTS AND ASSET RETIREMENT OBLIGATIONS

Schedule of impairment charges on mineral property

				Three months ended June 30,						Six months ended June 30,
Name of Property/Complex		Segment		2014			2013			2014			2013
				(in thousands)
Telken Tenements		Argentina		$	—		$	13,792		$	—		$	13,792
Este Tenements		Argentina		—			2,784			—			2,784
Piramides Tenements		Argentina		—			5,079			—			5,079
Tobias Tenements		Argentina		—			6,074			—			6,074
Los Azules Copper Project		Argentina		120,398			—			120,398			—
Total impairments				$	120,398		$	27,729		$	120,398		$	27,729

Schedule of reconciliation of asset retirement obligations

		Six months ended			Year Ended
		June 30, 2014			December 31, 2013
		(in thousands)
Asset retirement obligation liability, beginning balance		$	7,247		$	6,359
Settlements		(18		)	(60		)
Accretion of liability		209			461
Adjustment reflecting updated estimates		(42		)	487
Asset retirement obligation liability, ending balance		$	7,396		$	7,247