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Mining Properties (Tables)
12 Months Ended
Dec. 31, 2019
Mining Properties [Abstract]  
Mining Properties
Mining properties consist of the following (in thousands):
December 31, 2019
Palmarejo
 
Rochester
 
Silvertip
 
Kensington
 
Wharf
 
Sterling
 
La Preciosa
 
Other
 
Total
Mine development
$
260,838

 
$
220,127

 
$
50,146

 
$
345,026

 
$
34,165

 
$
3,651

 
$

 
$

 
$
913,953

Accumulated amortization
(179,894
)
 
(155,079
)
 
(9,623
)
 
(230,869
)
 
(20,071
)
 
(678
)
 

 

 
(596,214
)
 
80,944

 
65,048

 
40,523

 
114,157

 
14,094

 
2,973

 

 

 
317,739

Mineral interests
629,303

 
18,541

 
105,736

 


 
45,837

 
95,499

 
49,085

 
5,171

 
949,172

Accumulated amortization
(501,039
)
 


 
(24,147
)
 


 
(29,051
)


 

 
(719
)
 
(554,956
)
 
128,264

 
18,541

 
81,589

 

 
16,786

 
95,499

 
49,085

 
4,452

 
394,216

Mining properties, net
$
209,208

 
$
83,589

 
$
122,112

 
$
114,157

 
$
30,880

 
$
98,472

 
$
49,085

 
$
4,452

 
$
711,955

December 31, 2018
Palmarejo
 
Rochester
 
Silvertip
 
Kensington
 
Wharf
 
Sterling
 
La Preciosa
 
Other
 
Total
Mine development
$
239,780

 
$
200,126

 
$
101,933

 
$
324,414

 
$
41,761

 
$
4,070

 
$

 
$

 
$
912,084

Accumulated amortization
(163,414
)
 
(151,141
)
 
(1,411
)
 
(198,456
)
 
(18,759
)
 
(14
)
 

 

 
(533,195
)
 
76,366

 
48,985

 
100,522

 
125,958

 
23,002

 
4,056

 

 

 
378,889

Mineral interests
629,303

 
18,521

 
252,899

 

 
45,837

 
95,499

 
49,085

 
5,171

 
1,096,315

Accumulated amortization
(472,448
)
 

 
(4,105
)
 

 
(26,667
)
 

 

 
(417
)
 
(503,637
)
 
156,855

 
18,521

 
248,794

 

 
19,170

 
95,499

 
49,085

 
4,754

 
592,678

Mining properties, net
$
233,221

 
$
67,506

 
$
349,316

 
$
125,958

 
$
42,172

 
$
99,555

 
$
49,085

 
$
4,754

 
$
971,567