Income and Mining Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Income Tax Contingency [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 40,800
Deferred Income Tax Expense (Benefit)	15,000
Unrecognized tax benefits that would impact effective income tax rate	22,600		$ 22,600		$ 17,900
Penalties and interest accrued	9,000		9,000		$ 9,200
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	15,102	$ (22,479)	10,542	$ (72,636)
Income and mining tax benefit (expense)	54,455	8,260	53,118	8,451
Minimum [Member]
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	3,500		3,500
Maximum [Member]
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	4,500		4,500
ARGENTINA
Income Tax Contingency [Line Items]
Foreign	(301)	(731)	3,137	(2,083)
Current Foreign Tax Expense (Benefit)	67	(2)	(183)	(3)
United States - Alternative Minimum tax [Member]
Income Tax Contingency [Line Items]
United States	3,286	(16,168)	(5,956)	(46,640)
Current Federal Tax Expense (Benefit)	10,712	(1,080)	8,370	1,123
Mexico [Member]
Income Tax Contingency [Line Items]
Foreign	3,020	(1,412)	(1,136)	(16,666)
Current Foreign Tax Expense (Benefit)	37,821	11,951	42,155	11,234
BOLIVIA
Income Tax Contingency [Line Items]
Foreign	4,325	(4,483)	10,388	(8,081)
Current Foreign Tax Expense (Benefit)	5,904	(1,029)	5,182	(2,240)
Other Countries [Member]
Income Tax Contingency [Line Items]
Foreign	4,772	315	4,109	834
Current Foreign Tax Expense (Benefit)	$ (49)	$ (1,580)	$ (2,406)	$ (1,663)