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ACCUMULATED OTHER COMPREHENSIVE INCOME Schedules of Accumulate Other Comprehensive Income (Loss) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Unrealized net loss on qualifying cash flow hedging instruments $ (1,822) $ (6,832) $ (19,462)  
Unrealized gain on available-for-sale securities 7,796 5,911 0  
Losses associated with pensions, net of tax recoveries of $0.3 million (2011: $0.4 million) 12,731 17,809 15,486  
Losses associated with pensions, net of tax recoveries of $0.2 million (2012: $0.3 million) 200 300    
Accumulated Other Comprehensive Income (Loss), Net of Tax (6,757) (18,730) (34,948) (33,311)
Other comprehensive (loss) income before reclassification 22,760 7,229 (1,637)  
Amount reclassified from accumulated other comprehensive income (10,787) 8,989    
Movement in Other comprehensive Income 11,973 16,218 (1,637)  
Gain (losses) on available-for-sale securities
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax 7,796 5,911 0 0
Other comprehensive (loss) income before reclassification 12,680 5,911 0  
Amount reclassified from accumulated other comprehensive income (10,795) 0    
Movement in Other comprehensive Income 1,885 5,911 0  
Pension and post retirement benefit plan adjustments
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax (12,731) (17,809) (15,486) (12,347)
Other comprehensive (loss) income before reclassification 5,078 (2,323) (3,139)  
Amount reclassified from accumulated other comprehensive income 0 0    
Movement in Other comprehensive Income 5,078 (2,323) (3,139)  
Gains (losses) on cash flow hedges
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax (2,676) (6,832) (19,462) (20,964)
Other comprehensive (loss) income before reclassification 4,148 3,641 1,502  
Amount reclassified from accumulated other comprehensive income 8 8,989    
Movement in Other comprehensive Income 4,156 12,630 1,502  
Share of affiliates comprehensive income
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax 854 0 0 0
Other comprehensive (loss) income before reclassification 854 0 0  
Amount reclassified from accumulated other comprehensive income 0 0    
Movement in Other comprehensive Income $ 854 $ 0 $ 0