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FAIR VALUE MEASUREMENTS (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term deposits $ 10,000 $ 18,000
Restricted Deposits - current and non-current 2,154 2,494
Funds held in escrow 0 5,961
Derivative Assets 7  
Derivative Liabilities   (18)
Assets, Fair Value Disclosure 12,161 26,437
Fair Value, Inputs, Level 1 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term deposits 10,000 18,000
Restricted Deposits - current and non-current 2,154 2,494
Funds held in escrow 0 5,961
Derivative Assets 7  
Derivative Liabilities   (18)
Assets, Fair Value Disclosure 12,161 26,437
Fair Value, Inputs, Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term deposits 0 0
Restricted Deposits - current and non-current 0 0
Funds held in escrow 0 0
Derivative Assets 0  
Derivative Liabilities   0
Assets, Fair Value Disclosure 0 0
Fair Value, Inputs, Level 3 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term deposits 0 0
Restricted Deposits - current and non-current 0 0
Funds held in escrow 0 0
Derivative Assets 0  
Derivative Liabilities   0
Assets, Fair Value Disclosure $ 0 $ 0