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Mining Properties
 6 Months Ended
Jun. 30, 2017
Mining Properties [Abstract]  
MINING PROPERTIES
MINING PROPERTIES
Mining properties consist of the following (in thousands):
June 30, 2017
Palmarejo
 
Rochester
 
Kensington
 
Wharf
 
San
Bartolomé
 
La Preciosa
 
Other
 
Total
Mine development
$
185,416

 
$
181,199

 
$
286,801

 
$
37,818

 
$
39,423

 
$
—

 
$
—

 
$
730,657

Accumulated amortization
(139,170
)
 
(141,026
)
 
(165,193
)
 
(13,476
)
 
(33,094
)
 
—

 
—

 
(491,959
)
 
46,246

 
40,173

 
121,608

 
24,342

 
6,329

 
—

 
—

 
238,698

Mineral interests
629,303

 
—

 
—

 
45,837

 
12,868

 
49,085

 
41,272

 
778,365

Accumulated amortization
(404,134
)
 
—

 
—

 
(21,176
)
—

(11,839
)
 
—

 
(29,667
)
 
(466,816
)
 
225,169

 
—

 
—

 
24,661

 
1,029

 
49,085

 
11,605

 
311,549

Mining properties, net
$
271,415

 
$
40,173

 
$
121,608

 
$
49,003

 
$
7,358

 
$
49,085

 
$
11,605

 
$
550,247

December 31, 2016
Palmarejo
 
Rochester
 
Kensington
 
Wharf
 
San
Bartolomé
 
La Preciosa
 
Joaquin
 
Other
 
Total
Mine development
$
174,890

 
$
165,230

 
$
271,175

 
$
37,485

 
$
39,184

 
$
—

 
$
—

 
$
—

 
$
687,964

Accumulated amortization
(134,995
)
 
(138,244
)
 
(154,744
)
 
(11,699
)
 
(32,192
)
 
—

 


 
—

 
(471,874
)
 
39,895

 
26,986

 
116,431

 
25,786

 
6,992

 
—

 
—

 
—

 
216,090

Mineral interests
629,303

 
—

 
—

 
45,837

 
12,868

 
49,085

 
10,000

 
37,272

 
784,365

Accumulated amortization
(381,686
)
 
—

 
—

 
(19,249
)
 
(11,695
)
 
—

 
—

 
(29,370
)
 
(442,000
)
 
247,617

 
—

 
—

 
26,588

 
1,173

 
49,085

 
10,000

 
7,902

 
342,365

Mining properties, net
$
287,512

 
$
26,986

 
$
116,431

 
$
52,374

 
$
8,165

 
$
49,085

 
$
10,000

 
$
7,902

 
$
558,455


In February 2017, the Company sold the Joaquin silver-gold exploration project for consideration of $27.4 million and a 2.0% NSR royalty on the Joaquin project, which is included in Other. The Company recognized a $21.1 million pre-tax gain on this sale, included in Other, net on the Consolidated Statements of Comprehensive Income.
In June 2017, the Company entered into a Share and Asset Purchase Agreement with Metalla Royalty & Streaming Ltd. to sell the Endeavor silver stream and our remaining portfolio of royalties for total consideration of $13.0 million. The transaction is expected to close in the third quarter of 2017, subject to customary closing conditions. Current and prior period amounts are included in Other.