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FAIR VALUE MEASUREMENTS (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative Financial Instruments, Liabilities, Fair Value Disclosure $ (145) $ (7,376)
Fair Value, Measurements, Recurring [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments for contractual obligations 7,502 7,408
Interest Rate Derivative Assets, at Fair Value 0 1,048
Other Assets, Fair Value Disclosure 250 250
Assets, Fair Value Disclosure 7,607 1,330
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Preferred stock at beginning of period   250
Preferred stock at end of period 250 250
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments for contractual obligations 7,502 7,408
Interest Rate Derivative Assets, at Fair Value 0 0
Other Assets, Fair Value Disclosure 0 0
Derivative Financial Instruments, Liabilities, Fair Value Disclosure 0 0
Assets, Fair Value Disclosure 7,502 7,408
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Preferred stock at beginning of period   0
Preferred stock at end of period 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments for contractual obligations 0 0
Interest Rate Derivative Assets, at Fair Value 0 1,048
Other Assets, Fair Value Disclosure 0 0
Derivative Financial Instruments, Liabilities, Fair Value Disclosure (145) (7,376)
Assets, Fair Value Disclosure (145) (6,328)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Preferred stock at beginning of period   0
Preferred stock at end of period 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments for contractual obligations 0 0
Interest Rate Derivative Assets, at Fair Value 0 0
Other Assets, Fair Value Disclosure 250  
Derivative Financial Instruments, Liabilities, Fair Value Disclosure 0 0
Assets, Fair Value Disclosure 250 250
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Preferred stock at beginning of period 250  
Gain (Loss) on Investments 0  
Preferred stock at end of period $ 250