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Income Taxes
 3 Months Ended
Mar. 31, 2012
Income Tax Disclosure [Abstract]  
INCOME TAXES
INCOME TAXES
For the three months ended March 31, 2012 and 2011, the Company reported an income tax provision of approximately $15.4 million and $12.9 million, respectively. The following table summarizes the components of the Company’s income tax provision from continuing operations for the three months ended March 31, 2012 and 2011 (in thousands): 
 
Three months ended
March 31,
 
2012
 
2011
Current:
 
 
 
United States - Alternative minimum tax
$
—

 
$
1,938

United States - Foreign withholding
(17
)
 
(78
)
Argentina
(201
)
 
98

Australia
(371
)
 
101

Mexico
(154
)
 
(50
)
Bolivia
(7,015
)
 
(9,079
)
Deferred:
 
 
 
United States
(3,120
)
 
(616
)
Australia
(340
)
 
(519
)
Mexico
(3,544
)
 
(3,776
)
Bolivia
(674
)
 
(958
)
Income tax provision from continuing operations
$
(15,436
)
 
$
(12,939
)

The income tax provision for the three months ended March 31, 2012 varies from the statutory rate primarily because of differences in tax rates for the Company’s foreign operations and changes in valuation allowances for net deferred tax assets, permanent differences and foreign exchange rate differences. The Company has U.S. net operating loss carryforwards which expire in 2017 through 2031. Net operating losses in foreign countries have an indefinite carryforward period, except in Mexico where net operating loss carryforwards are limited to ten years.