Mining Properties (Tables)

3 Months Ended

Mar. 31, 2017

Mining Properties [Abstract]

Mining Properties

Mining properties consist of the following (in thousands):

March 31, 2017	Palmarejo			Rochester			Kensington			Wharf				San Bartolomé			La Preciosa		Other			Total
Mine development	$	179,562		$	171,543		$	279,095		$	37,562			$	39,338		$	—	$	—		$	707,100
Accumulated amortization	(137,215		)	(139,519		)	(159,485		)	(12,530		)		(32,625		)	—		—			(481,374		)
	42,347			32,024			119,610			25,032				6,713			—		—			225,726
Mineral interests	629,303			—			—			45,837				12,868			49,085		41,272			778,365
Accumulated amortization	(393,532		)	—			—			(20,106		)	—	(11,762		)	—		(29,484		)	(454,884		)
	235,771			—			—			25,731				1,106			49,085		11,788			323,481
Mining properties, net	$	278,118		$	32,024		$	119,610		$	50,763			$	7,819		$	49,085	$	11,788		$	549,207

December 31, 2016	Palmarejo			Rochester			Kensington			Wharf			San Bartolomé			La Preciosa		Joaquin		Other			Total
Mine development	$	174,890		$	165,230		$	271,175		$	37,485		$	39,184		$	—	$	—	$	—		$	687,964
Accumulated amortization	(134,995		)	(138,244		)	(154,744		)	(11,699		)	(32,192		)	—				—			(471,874		)
	39,895			26,986			116,431			25,786			6,992			—		—		—			216,090
Mineral interests	629,303			—			—			45,837			12,868			49,085		10,000		37,272			784,365
Accumulated amortization	(381,686		)	—			—			(19,249		)	(11,695		)	—		—		(29,370		)	(442,000		)
	247,617			—			—			26,588			1,173			49,085		10,000		7,902			342,365
Mining properties, net	$	287,512		$	26,986		$	116,431		$	52,374		$	8,165		$	49,085	$	10,000	$	7,902		$	558,455