MINING PROPERTIES (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2013

Dec. 31, 2012

Text Block [Abstract]

Mining Properties

Mining properties consist of the following (in thousands):

June 30, 2013	Palmarejo			San Bartolomé			Kensington			Rochester			Endeavor			La Preciosa		Joaquin		Total
Mining properties	$	162,855		$	70,360		$	338,907		$	120,350		$	—		$	—	$	—	$	692,472
Accumulated depletion		(94,647	)		(20,305	)		(60,310	)		(101,353	)		—			—		—		(276,615	)
		68,208			50,055			278,597			18,997			—			—		—		415,857
Mineral interests		1,660,580			26,643			—			—			44,033			408,352		93,429		2,233,037
Accumulated depletion		(266,499	)		(8,037	)		—			—			(16,669	)		—		—		(291,205	)
		1,394,081			18,606			—			—			27,364			408,352		93,429		1,941,832
Non-producing and development properties		—			—			—			—			—			—		—		—
Total mining properties	$	1,462,289		$	68,661		$	278,597		$	18,997		$	27,364		$	408,352	$	93,429	$	2,357,689

December 31, 2012	Palmarejo			San Bartolomé			Kensington			Rochester			Endeavor			Joaquin		Other			Total
Mining properties	$	155,722		$	70,322		$	333,619		$	114,973		$	—		$	—	$	11,416		$	686,052
Accumulated depletion		(82,037	)		(18,439	)		(46,649	)		(100,437	)		—			—		(11,416	)		(258,978	)
		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
Non-producing and development properties		—			—			—			—			—			—		142			142
Total mining properties	$	1,496,279		$	71,187		$	286,970		$	14,536		$	29,408		$	93,429	$	142		$	1,991,951

Mining properties consist of the following (in thousands):

December 31, 2012	Palmarejo			San Bartolomé			Kensington			Rochester			Martha			Endeavor			Joaquin		Other		Total
Mining properties	$	155,722		$	70,322		$	333,619		$	114,973		$	11,416		$	—		$	—	$	—	$	686,052
Accumulated depletion		(82,037	)		(18,439	)		(46,649	)		(100,437	)		(11,416	)		—			—		—		(258,978	)
		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
Non-producing and development properties		—			—			—			—			—			—			—		142		142
Total mining properties	$	1,496,279		$	71,187		$	286,970		$	14,536		$	—		$	29,408		$	93,429	$	142	$	1,991,951

December 31, 2011	Palmarejo			San Bartolomé			Kensington			Rochester			Martha			Endeavor			Joaquin		Other		Total
Mining properties	$	134,296		$	68,684		$	321,456		$	112,826		$	12,643		$	—		$	—	$	—	$	649,905
Accumulated depletion		(53,060	)		(14,989	)		(27,160	)		(97,834	)		(10,373	)		—			—		—		(203,416	)
		81,236			53,695			294,296			14,992			2,270			—			—		—		446,489
Mineral interests		1,658,389			26,642			—			—			—			44,033			—		—		1,729,064
Accumulated depletion		(158,627	)		(6,007	)		—			—			—			(10,034	)		—		—		(174,668	)
		1,499,762			20,635			—			—			—			33,999			—		—		1,554,396
Non-producing and development properties		—			—			—			—			—			—			—		142		142
Total mining properties	$	1,580,998		$	74,330		$	294,296		$	14,992		$	2,270		$	33,999		$	—	$	142	$	2,001,027