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Discontinued Operations (Details)
 3 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended
Mar. 31, 2012
USD ($)
Mar. 31, 2011
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2012
Venezuela
USD ($)
Aug. 31, 2012
Venezuela
USD ($)
Dec. 31, 2012
Venezuela
USD ($)
Dec. 31, 2011
Venezuela
USD ($)
Dec. 31, 2010
Venezuela
USD ($)
item
Dec. 31, 2009
Venezuela
USD ($)
Jan. 31, 2010
Venezuela
VEB
Dec. 31, 2009
Venezuela
VEB
Dec. 31, 2012
Canada
USD ($)
Dec. 31, 2011
Canada
USD ($)
Dec. 31, 2010
Canada
USD ($)
Discontinued Operations                                
Asset impairment charges excluding insurance proceeds                     $ 379,700,000          
Asset impairment charge                     329,700,000     80,200,000    
Sale price of expropriated assets             441,700,000                  
Proceeds from sale of expropriated assets           16,800,000 176,700,000                  
Reduction in previously unrecognized tax benefit     (1,263,000) 167,000       15,500,000                
Remitted amount             50,000,000                  
Remaining expected proceeds from sale of expropriated assets               248,000,000                
Translation gain                   12,200,000            
Exchange rate used for remeasurement of net liabilities                       4.3 2.15      
Benefit related to the recovery of loss                   41,000,000            
Number of projects                   2            
Summary of operating results of the discontinued operations                                
Revenue 11,300,000 11,600,000 50,557,000 53,591,000 47,290,000         2,940,000       50,557,000 53,591,000 44,350,000
Expenses and selling, general and administrative     51,796,000 60,723,000 58,451,000     1,275,000 1,302,000 5,892,000       50,521,000 59,421,000 52,559,000
Loss (recovery) attributable to expropriation, impairments and inventory write downs     (56,788,000) 4,036,000 (35,896,000)     (136,947,000) 3,092,000 (38,925,000)       80,159,000 944,000 3,029,000
Other (income) loss, net     (349,000) 78,000 (14,495,000)     (219,000) (150,000) (12,145,000)       (130,000) 228,000 (2,350,000)
Provision for (benefit from) income taxes     (10,945,000) (1,141,000) (1,509,000)     (13,509,000) 1,719,000 2,795,000       2,564,000 (2,860,000) (4,304,000)
Income (loss) from discontinued operations, net of tax     66,843,000 (10,105,000) 40,739,000     149,400,000 (5,963,000) 45,323,000       (82,557,000) (4,142,000) (4,584,000)
Summary of balance sheet data for discontinued operations                                
Cash     904,000 439,000   113,000   113,000 304,000         791,000 135,000  
Accounts receivable     9,165,000 13,982,000   17,000   17,000 9,000         9,148,000 13,973,000  
Inventory     9,826,000 20,607,000         1,017,000         9,826,000 19,590,000  
Other current assets     1,851,000 3,636,000   41,000   41,000 2,683,000         1,810,000 953,000  
Total current assets associated with discontinued operations     21,746,000 38,664,000   171,000   171,000 4,013,000         21,575,000 34,651,000  
Property, plant and equipment       69,788,000                     69,788,000  
Intangible and other long-term assets       9,432,000                     9,432,000  
Total assets associated with discontinued operations     21,746,000 117,884,000   171,000   171,000 4,013,000         21,575,000 113,871,000  
Accounts payable     3,844,000 6,104,000   499,000   499,000 589,000         3,345,000 5,515,000  
Accrued liabilities     7,059,000 8,219,000   4,335,000   4,335,000 4,295,000         2,724,000 3,924,000  
Deferred revenues     669,000 1,819,000         1,499,000         669,000 320,000  
Total current liabilities associated with discontinued operations     11,572,000 16,142,000   4,834,000   4,834,000 6,383,000         6,738,000 9,759,000  
Other long-term liabilities     1,044,000 14,688,000   455,000   455,000 14,140,000         589,000 548,000  
Total liabilities associated with discontinued operations     $ 12,616,000 $ 30,830,000   $ 5,289,000   $ 5,289,000 $ 20,523,000         $ 7,327,000 $ 10,307,000