Mining Properties (Tables)

9 Months Ended

Sep. 30, 2013

Mining Properties [Abstract]

Mining Properties

Mining properties consist of the following (in thousands):

September 30, 2013	Palmarejo			San Bartolomé			Kensington			Rochester			Endeavor			La Preciosa		Joaquin		Total
Mining properties	$	170,789		$	70,371		$	345,447		$	148,626		$	—		$	—	$	—	$	735,233
Accumulated depletion	(101,687		)	(21,270		)	(68,909		)	(102,105		)	—			—		—		(293,971		)
	69,102			49,101			276,538			46,521			—			—		—		441,262
Mineral interests	1,660,580			26,643			—			—			44,033			408,352		93,429		2,233,037
Accumulated depletion	(282,339		)	(8,398		)	—			—			(17,563		)	—		—		(308,300		)
	1,378,241			18,245			—			—			26,470			408,352		93,429		1,924,737
Total mining properties	$	1,447,343		$	67,346		$	276,538		$	46,521		$	26,470		$	408,352	$	93,429	$	2,365,999

December 31, 2012	Palmarejo			San Bartolomé			Kensington			Rochester			Endeavor			Joaquin		Total
Mining properties	$	155,722		$	70,322		$	333,619		$	114,973		$	—		$	—	$	674,636
Accumulated depletion	(82,037		)	(18,439		)	(46,649		)	(100,437		)	—			—		(247,562		)
	73,685			51,883			286,970			14,536			—			—		427,074
Mineral interests	1,658,389			26,642			—			—			44,033			93,429		1,822,493
Accumulated depletion	(235,795		)	(7,338		)	—			—			(14,625		)	—		(257,758		)
	1,422,594			19,304			—			—			29,408			93,429		1,564,735
Total mining properties	$	1,496,279		$	71,187		$	286,970		$	14,536		$	29,408		$	93,429	$	1,991,809