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Long-term Debt Narrative (Details) | 12 Months Ended |  | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |
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Dec. 31, 2011 USD ($) | Dec. 31, 2010 USD ($) | Dec. 31, 2009 USD ($) | Dec. 31, 2009 Senior Notes Maturing 2010 [Member] [Member] USD ($) | Dec. 31, 2011 US credit line [Member] USD ($) | Dec. 31, 2011 Canada credit line [Member] USD ($) | Dec. 31, 2011 Letter of Credit [Member] USD ($) | Dec. 31, 2011 Chilean Bank Loan [Member] payments | Dec. 31, 2011 Brazilian Term Credit Facility Maturing 2017 [Member] USD ($) payments | Dec. 31, 2010 Brazilian Term Credit Facility Maturing 2017 [Member] USD ($) | Dec. 31, 2011 Senior Notes Payable 2012 [Member] USD ($) | Dec. 31, 2010 Senior Notes Payable 2012 [Member] USD ($) | Dec. 31, 1997 Senior Notes Payable 2012 [Member] USD ($) | Dec. 31, 2011 Senior Notes Payable 2013 Thru 2018 [Member] USD ($) | Dec. 31, 2010 Senior Notes Payable 2013 Thru 2018 [Member] USD ($) | Dec. 31, 2011 Non Recourse Notes Payable 2018 [Member] USD ($) | Dec. 31, 2010 Non Recourse Notes Payable 2018 [Member] USD ($) | Dec. 31, 2011 Senior Secured Notes Maturing 2017 [Member] USD ($) | Dec. 31, 2010 Senior Secured Notes Maturing 2017 [Member] USD ($) | Dec. 31, 2011 Chilian Term Credit Facility Maturing 2019 [Member] USD ($) | Dec. 31, 2011 Chilian Term Credit Facility Maturing 2019 [Member] CLP | Dec. 31, 2010 Chilian Term Credit Facility Maturing 2019 [Member] USD ($) | Dec. 31, 2011 Senior Secured Notes Maturing 2017 plus warrants [Member] | Dec. 31, 2011 Senior secured notes 2017 per unit [Member] USD ($) | Dec. 31, 2011 Senior Notes Maturing 2010 [Member] [Member] USD ($) | Dec. 31, 2011 Warrant [Member] USD ($) | Dec. 31, 2009 Warrant [Member] USD ($) | Dec. 31, 2009 Common Stock [Member] | Dec. 31, 2011 Senior Notes Receivable, due 2012 [Member] USD ($) | Dec. 31, 2010 Senior Notes Receivable, due 2012 [Member] USD ($) | Dec. 31, 2011 Senior Notes 2018 [Member] USD ($) | Dec. 31, 2010 Senior Notes 2018 [Member] USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of debt |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 122,000,000 | $ 126,000,000 |  |  | $ 243,000,000 | $ 263,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of loan issuance |  |  |  |  |  |  |  |  |  |  |  |  | 47,900,000 | 348,600,000 |  | 368,700,000 |  | 375,000,000 |  | 39,000,000 | 943,543.7391 |  |  | 1,000 |  |  |  |  |  |  |  |
Notes payable | 7,900,000 | 0 |  |  |  |  |  |  | 10,000,000 | 0 | 7,900,000 | 7,900,000 |  | 112,000,000 | 112,000,000 | 368,700,000 | 368,700,000 | 189,600,000 | 183,500,000 | 40,500,000 |  | 42,300,000 |  |  |  |  |  |  |  |  |  |
Notes, Loans and Financing Receivable, Net | 533,500,000 | 533,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,900,000 | 9,900,000 |  | 410,000,000
Maturity in 2013 | 97,000,000 |  |  |  |  |  |  |  |  |  |  |  |  | 90,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity in 2018 | 597,900,000 |  |  |  |  |  |  |  |  |  |  |  |  | 22,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes receivable used as collateral on loan |  |  |  |  |  |  |  |  |  |  |  |  |  | 113,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 410,000,000 |
Amount of indebtedness liable for in event of default of notes receivable collateral |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Capital Leases Disclosures [Text Block] | 375000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  | 6.65% |  | 0.00% |  |  |  |  | 0.00% |  | 13.00% |  | 3.90% | 3.90% |  |  |  | 8.875% |  |  |  |  |  |  |
Required Debt To Equity Ratio Maximum | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 3,900,000 |  | 18,395,963 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,395,963 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.39 | $ 1.39 |  |  |  |  |
Long-term Debt | 729,100,000 | 714,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 281,000,000 |  |  |  |  |  |  | 126,600,000 |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19.10% |  |  |  |  | 19.70% |  |  |  |  |  |  |  |  |
Repayment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 112,600,000 |  |  |  |  |  | 0 | 126,000,000 |  |  |  |  |  |  |
percent of debt redeemed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 35.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount at repayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 131,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | 5,000,000 | 5,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,700,000 |  |  |  |
Gains (Losses) on Extinguishment of Debt | 0 | 0 | (20,700,000) | 21,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of Financing Costs and Discounts | 2,600,000 | 3,100,000 | 3,000,000 | (3,700,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 100,000,000 |  |  |  | 60,000,000 | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Required Fixed Charge Coverage Ratio When Unused Borrowing Capacity Is Below 15 Million | 1.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
excess of adjusted borrowing base | 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Unused Borrowing Capacity, Amount | 87,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum Required Percent Of Cash Collateral To Stated Amount Of Letters Of Credit | 105.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of Credit Outstanding, Amount | 9,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted cash | 12,900,000 | 31,100,000 |  |  |  |  | 10,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Fixed Charge Coverage Ratio | 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ratio of Indebtedness to Net Capital | 2.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Required Ebitda to Financial Costs Minimum | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Future Semi Annual Payments |  |  |  |  |  |  |  | 16 | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, Weighted Average Interest Rate | 550.00% | 570.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Paid, Net | $ 56,600,000 | $ 57,000,000 | $ 63,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13, 16 -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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