Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of effective tax rate with the federal statutory tax rate
Tax benefit (expense) from continuing operations	$ 283,038	$ (41,819)	$ (72,886)
State tax provision from continuing operations	2,245	(3,151)	(11,009)
Percentage depletion and related deductions	0	7,461	0
Change in valuation allowance	(106,802)	(12,651)	(6,032)
Non-deductible imputed interest	(214)	(525)	(808)
Uncertain tax positions	(5,209)	(9,849)	(1,279)
U.S. and foreign non-deductible expenses	(2,383)	(4,206)	(10,648)
Foreign exchange rates	13,937	(10,416)	(4,440)
Foreign inflation and indexing	2,937	712	(3,829)
Foreign tax rate differences	(24,108)	3,967	22,795
Foreign withholding taxes	(100,331)	(5,861)	(23,246)
Other, net	13,153	5,531	(3,364)
Change in Mexico permanent reinvestment assertion	81,853	0	0
Income tax provision from continuing operations	$ 158,116	$ (70,807)	$ (114,746)