Write-Downs (Tables)

12 Months Ended

Dec. 31, 2014

Details of Impairment by Long-Lived Asset Class [Abstract]

Details of Impairment of Long-Lived Assets Held and Used by Asset [Table Text Block]

	Year ended December 31,
	2014		2013		2012
Mining properties
Palmarejo	668,803		539,359		—
San Bartolomé	32,328		—		—
Kensington	67,671		82,337		—
La Preciosa	371,411		—		—
Joaquin	83,429		—		—
Coeur Capital (El Gallo)	6,202		—		—
Martha	—		205		5,825
	1,229,844		621,901		5,825
Property, plant, and equipment
Palmarejo	$	115,235	$	102,735	$	—
San Bartolomé	86,426		—		—
Kensington	40,161		48,357		—
La Preciosa	1,055		—		—
	242,877		151,092		—
Total	$	1,472,721	$	772,993	$	5,825