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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at the beginning of the period $ (11,841) $ (17,549) $ (5,210)
OCI before reclassifications 75,526 19,148 16,515
Amounts reclassified from AOCI (9,963) (13,440) (28,854)
Net current-period OCI 65,563 5,708 (12,339)
Balance at the end of the period 53,722 (11,841) (17,549)
Total reclassification for the period 88,216 87,558 86,722
Reclassification out of Accumulated Other Comprehensive Income [Member]
      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Total reclassification for the period 9,963    
Net Unrealized Gain (loss) on Cash Flow Hedges [Member]
      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at the beginning of the period (16,057) (25,245) (43,152)
OCI before reclassifications 19,044 22,628 46,761
Amounts reclassified from AOCI (9,963) (13,440) (28,854)
Net current-period OCI 9,081 9,188 17,907
Balance at the end of the period (6,976) (16,057) (25,245)
Net Unrealized Gain (loss) on Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Total reclassification for the period 9,963    
Unrealized Gain (loss) on Investment [Member]
      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at the beginning of the period 4,216 7,696 37,942
OCI before reclassifications 56,482 (3,480) (30,246)
Amounts reclassified from AOCI 0 0 0
Net current-period OCI 56,482 (3,480) (30,246)
Balance at the end of the period $ 60,698 $ 4,216 $ 7,696