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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
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Aggregate revenue from the sale of minerals and related products, and from rendering services such as exploration, development, mining, processing and providing mining support activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a),(d))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
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Segment Reporting (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Segment Reporting (Details 2) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	$ 779,486		$ 779,486		$ 786,908
Revenues
Revenue	173,354	$ 180,197	379,492	$ 326,833
Revenues	173,354	182,007	379,492	330,394
UNITED STATES
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	365,519		365,519		338,897
Revenues
Revenue	95,371	106,236	202,565	199,890
Mexico
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	375,536		375,536		397,697
Revenues
Revenue	53,235	48,489	130,939	79,011
BOLIVIA
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	29,918		29,918		31,539
Revenues
Revenue	23,814	25,185	44,398	46,463
AUSTRALIA
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	2,684		2,684		2,983
Revenues
Revenue	934	504	1,590	2,395
ARGENTINA
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	228		228		10,228
Other Foreign Countries [Member]
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	5,601		5,601		$ 5,564
Revenues
Revenue	$ 0	$ 1,593	$ 0	$ 2,635