Derivative Financial Instruments (Details)	3 Months Ended																																																	3 Months Ended
	Mar. 31, 2014 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2013 oz	Mar. 31, 2014 Palmarejo gold production royalty [Member] 2013 [Member] USD ($) oz	Mar. 31, 2014 Palmarejo gold production royalty [Member] 2014 [Member] USD ($) oz	Mar. 31, 2014 Palmarejo gold production royalty [Member] 2015 [Member] USD ($) oz	Mar. 31, 2014 Palmarejo gold production royalty [Member] Thereafter [Member] USD ($) oz	Mar. 31, 2014 Mexico Peso Put Options [Member] 2013 [Member] oz	Mar. 31, 2014 Mexico Peso Put Options [Member] 2014 [Member] USD ($) oz	Mar. 31, 2014 Mexico Peso Put Options [Member] 2014 [Member] MXN	Mar. 31, 2014 Mexico Peso Put Options [Member] 2015 [Member] USD ($) oz	Mar. 31, 2014 Mexico Peso Put Options [Member] 2015 [Member] MXN	Mar. 31, 2014 Mexico Peso Put Options [Member] Thereafter [Member] USD ($) oz	Mar. 31, 2014 Mexico Peso Put Options [Member] Thereafter [Member] MXN	Mar. 31, 2014 Mexico peso call options [Member] 2013 [Member] oz	Mar. 31, 2014 Mexico peso call options [Member] 2014 [Member] USD ($) oz	Mar. 31, 2014 Mexico peso call options [Member] 2014 [Member] MXN	Mar. 31, 2014 Mexico peso call options [Member] 2015 [Member] USD ($) oz	Mar. 31, 2014 Mexico peso call options [Member] 2015 [Member] MXN	Mar. 31, 2014 Mexico peso call options [Member] Thereafter [Member] USD ($) oz	Mar. 31, 2014 Mexico peso call options [Member] Thereafter [Member] MXN	Mar. 31, 2014 Silver concentrate sales agreements [Member] 2013 [Member] USD ($) oz	Dec. 31, 2013 Silver concentrate sales agreements [Member] 2013 [Member] oz	Mar. 31, 2014 Silver concentrate sales agreements [Member] 2014 [Member] USD ($) oz	Mar. 31, 2014 Silver concentrate sales agreements [Member] 2015 [Member] USD ($) oz	Mar. 31, 2014 Silver concentrate sales agreements [Member] Thereafter [Member] USD ($) oz	Mar. 31, 2014 Gold concentrates sales agreements [Member] 2013 [Member] USD ($) oz	Dec. 31, 2013 Gold concentrates sales agreements [Member] 2013 [Member]	Mar. 31, 2014 Gold concentrates sales agreements [Member] 2014 [Member] USD ($) oz	Mar. 31, 2014 Gold concentrates sales agreements [Member] 2015 [Member] USD ($) oz	Mar. 31, 2014 Gold concentrates sales agreements [Member] Thereafter [Member] USD ($) oz	Mar. 31, 2014 Gold put options purchased [Member] 2013 [Member] USD ($) oz	Mar. 31, 2014 Gold put options purchased [Member] 2014 [Member] USD ($) oz	Mar. 31, 2014 Gold put options purchased [Member] 2015 [Member] USD ($) oz	Mar. 31, 2014 Gold put options purchased [Member] Thereafter [Member] USD ($) oz	Mar. 31, 2014 Gold call options sold [Member] 2013 [Member] USD ($)	Mar. 31, 2014 Gold call options sold [Member] 2014 [Member] oz	Mar. 31, 2014 Silver put options purchased [Member] 2013 [Member] USD ($) oz	Mar. 31, 2014 Silver put options purchased [Member] 2014 [Member] USD ($) oz	Mar. 31, 2014 Silver put options purchased [Member] 2015 [Member] USD ($) oz	Mar. 31, 2014 Silver put options purchased [Member] Thereafter [Member] USD ($) oz	Mar. 31, 2014 Silver Put Options Sold [Member] 2014 [Member] USD ($) oz	Dec. 31, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Dec. 31, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] MXN	Mar. 31, 2014 Mexico peso call options [Member] Mexican peso forward purchase contracts [Member] 2013 [Member] USD ($)	Mar. 31, 2014 Mexico peso call options [Member] Mexican peso forward purchase contracts [Member] 2013 [Member] MXN	Mar. 31, 2014 Mexico Peso Put Options [Member] 2013 [Member] USD ($)	Mar. 31, 2014 Mexico Peso Put Options [Member] 2013 [Member] MXN	Dec. 31, 2013 Line of Credit [Member] Put Option [Member] oz	Mar. 31, 2014 Line of Credit [Member] Put Option [Member] Gold put options purchased [Member] 2013 [Member] USD ($)	Mar. 31, 2014 Line of Credit [Member] Put Option [Member] Silver put options purchased [Member] 2013 [Member] USD ($)
Derivative [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ (11,436,000)	$ 17,796,000
Derivative instruments Settlement
Derivative, notional amount				21,708,000	24,764,000	14,860,000	0															3,041,000		0	0	0	24,204,000		0	0	0	60,000,000	0	0	0	(52,500,000)		45,000,000	0	0	0	(40,000,000)	45,000,000
Weighted Average Call Feature of Each Collar																																																			18.00
Weighted Average Put Feature of Each Collar																																																		1,200
Derivative average gold price in excess of minimum contractual Deduction Rate	408			498	0	0	0
Notional ounces				43,602	50,153	30,348	0	524,300,000	0	0	0	0	0	0	439,600,000	0	0	0	0	0	0			0	0	0			0	0	0	50,000	0	0	0			2,500,000	0	0	0
Foreign exchange contracts of MXP																																											12,000,000		35,000,000		35,000,000
Fair value of foreign exchange contracts									$ 0		$ 0		$ 0			$ 0		$ 0		$ 0
Average rate (MXP/$)										0		0		0			0		0		0																							14.80		12.56		14.98
Derivative average price																						20.47	20.98	0	0	0	1,310	1,259	0	0	0
Outstanding Provisionally Priced Sales Consists of Gold			30,780																								18,471
Outstanding Provisionally Priced Sales Consists of Silver																						148,594	200,000
Average strike price																																	0	0	0				0	0	0
Weighted Average Strike Price of Put Options																																					1,050					16.00
Outstanding Put Options of Gold																																					50,000												25,000
Outstanding Put Options of Silver																																										2,500,000							1,250,000