Derivative Financial Instruments (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Fair value adjustments, net	$ 82,768	$ (23,487)	$ (52,050)
Fair value adjustments, net	80,928	(23,426)	(49,162)
Concentrate Sales Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Sales of Metals	(1,995)	1,682	2,505
Forward foreign exchange contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Production costs applicable to sales	589	(1,621)	383
Fair value adjustments, net	(985)	3,264	(3,192)
Gold lease facility [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value adjustments, net	0	0	(132)
Forward gold contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value adjustments, net	0	0	34
Silver Ounces Receivables [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value adjustments, net	0	213	(276)
Palmarejo gold production royalty [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value adjustments, net	76,200	(31,053)	(40,046)
Put and call options [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value adjustments, net	$ 7,119	$ 4,089	$ (8,438)