Write-Downs (Tables)

12 Months Ended

Dec. 31, 2017

Impairment or Disposal of Tangible Assets Disclosure [Abstract]

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

	Year ended December 31,
	2017		2016		2015
Mining properties
Palmarejo	$	—	$	—	$	205,803
Coeur Capital	—		4,446		22,118
	—		4,446		227,921
Property, plant, and equipment
Palmarejo	$	—	$	—	$	18,704
Total	$	—	$	4,446	$	246,625