Mining Properties (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Mining Properties
Operational mining properties:	$ 612,162	$ 557,799
Accumulated depletion	(424,642)	(368,410)
Operational mining properties, net	187,520	189,389
Mineral interest	806,436	679,429
Accumulated depletion	(404,737)	(367,626)
Mineral interest, net	401,699	311,803
Total mining properties	589,219	501,192
Palmarejo [Member]
Mining Properties
Operational mining properties:	151,828	137,821
Accumulated depletion	(131,055)	(121,906)
Operational mining properties, net	20,773	15,915
Mineral interest	629,303	521,349
Accumulated depletion	(348,268)	(332,032)
Mineral interest, net	281,035	189,317
Total mining properties	301,808	205,232
San Bartolome [Member]
Mining Properties
Operational mining properties:	39,474	49,305
Accumulated depletion	(30,325)	(26,106)
Operational mining properties, net	9,149	23,199
Mineral interest	12,868	17,560
Accumulated depletion	(11,400)	(10,143)
Mineral interest, net	1,468	7,417
Total mining properties	10,617	30,616
Kensington [Member]
Mining Properties
Operational mining properties:	238,786	217,138
Accumulated depletion	(131,236)	(106,865)
Operational mining properties, net	107,550	110,273
Mineral interest	0	0
Accumulated depletion	0	0
Mineral interest, net	0	0
Total mining properties	107,550	110,273
Rochester [Member]
Mining Properties
Operational mining properties:	149,756	153,535
Accumulated depletion	(126,242)	(113,533)
Operational mining properties, net	23,514	40,002
Mineral interest	0	0
Accumulated depletion	0	0
Mineral interest, net	0	0
Total mining properties	23,514	40,002
Wharf [Member]
Mining Properties
Operational mining properties:	32,318
Accumulated depletion	(5,784)
Operational mining properties, net	26,534
Mineral interest	45,837
Accumulated depletion	(10,551)
Mineral interest, net	35,286
Total mining properties	61,820
Endeavor [Member]
Mining Properties
Operational mining properties:	0	0
Accumulated depletion	0	0
Operational mining properties, net	0	0
Mineral interest	49,085	49,059
Accumulated depletion	0	0
Mineral interest, net	49,085	49,059
Total mining properties	49,085	49,059
Joaquin Project - Argentina [Member]
Mining Properties
Operational mining properties:	0	0
Accumulated depletion	0	0
Operational mining properties, net	0	0
Mineral interest	10,000	10,000
Accumulated depletion	0	0
Mineral interest, net	10,000	10,000
Total mining properties	10,000	10,000
Other Mining Properties [Member]
Mining Properties
Operational mining properties:	$ 0	0
Accumulated depletion		0
Operational mining properties, net	$ 0	0
Mineral interest	59,343	81,461
Accumulated depletion	(34,518)	(25,451)
Mineral interest, net	24,825	56,010
Total mining properties	$ 24,825	$ 56,010