Income Taxes (Tables)

6 Months Ended

Jun. 30, 2011

Income Taxes (Tables) [Abstract]

Income tax provision from continuing operations

	Three months ended						Six months ended
	June 30,						June 30,
	2011			2010			2011			2010
Current:
United States — Alternative minimum tax	$	—		$	—		$	1,938		$	—
United States — Foreign withholding		(413	)		(624	)		(491	)		(1,115	)
Argentina		(15	)		(2,128	)		83			(2,141	)
Australia		(760	)		(57	)		(659	)		(57	)
Mexico		(90	)		(33	)		(140	)		(83	)
Bolivia		(15,926	)		(3,721	)		(25,005	)		(2,890	)
Deferred:
United States		(1,789	)		20,422			(2,405	)		14,486
Australia		60			(292	)		(459	)		(582	)
Mexico		(6,286	)		(4,007	)		(10,062	)		10,363
Bolivia		3,817			(188	)		2,859			(1,611	)
Income tax benefit (provision) from continuing operations	$	(21,402	)	$	9,372		$	(34,341	)	$	16,370