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Mining Properties (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
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Mining Properties |  |
Operational mining properties: | $ 657,386 | $ 612,162
Accumulated depletion | (458,840) | (424,642)
Operational mining properties, net | 198,546 | 187,520
Mineral interest | 784,365 | 806,436
Accumulated depletion | (430,857) | (404,737)
Mineral interest, net | 353,508 | 401,699
Total mining properties | 552,054 | 589,219
Palmarejo [Member] |  |
Mining Properties |  |
Operational mining properties: | 169,892 | 151,828
Accumulated depletion | (133,685) | (131,055)
Operational mining properties, net | 36,207 | 20,773
Mineral interest | 629,303 | 629,303
Accumulated depletion | (371,589) | (348,268)
Mineral interest, net | 257,714 | 281,035
Total mining properties | 293,921 | 301,808
Rochester [Member] |  |
Mining Properties |  |
Operational mining properties: | 154,997 | 149,756
Accumulated depletion | (134,429) | (126,242)
Operational mining properties, net | 20,568 | 23,514
Mineral interest | 0 | 0
Accumulated depletion | 0 | 0
Mineral interest, net | 0 | 0
Total mining properties | 20,568 | 23,514
Kensington [Member] |  |
Mining Properties |  |
Operational mining properties: | 259,468 | 238,786
Accumulated depletion | (147,932) | (131,236)
Operational mining properties, net | 111,536 | 107,550
Mineral interest | 0 | 0
Accumulated depletion | 0 | 0
Mineral interest, net | 0 | 0
Total mining properties | 111,536 | 107,550
Wharf [Member] |  |
Mining Properties |  |
Operational mining properties: | 33,344 | 32,318
Accumulated depletion | (11,001) | (5,784)
Operational mining properties, net | 22,343 | 26,534
Mineral interest | 45,837 | 45,837
Accumulated depletion | (18,335) | (10,551)
Mineral interest, net | 27,502 | 35,286
Total mining properties | 49,845 | 61,820
San Bartolome [Member] |  |
Mining Properties |  |
Operational mining properties: | 39,685 | 39,474
Accumulated depletion | (31,793) | (30,325)
Operational mining properties, net | 7,892 | 9,149
Mineral interest | 12,868 | 12,868
Accumulated depletion | (11,632) | (11,400)
Mineral interest, net | 1,236 | 1,468
Total mining properties | 9,128 | 10,617
La Preciosa [Member] |  |
Mining Properties |  |
Operational mining properties: | 0 | 0
Accumulated depletion | 0 | 0
Operational mining properties, net | 0 | 0
Mineral interest | 49,085 | 49,085
Accumulated depletion | 0 | 0
Mineral interest, net | 49,085 | 49,085
Total mining properties | 49,085 | 49,085
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 | 0
Operational mining properties, net | 0 | 0
Mineral interest | 37,272 | 59,343
Accumulated depletion | (29,301) | (34,518)
Mineral interest, net | 7,971 | 24,825
Total mining properties | $ 7,971 | $ 24,825

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