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FINANCIAL INSTRUMENTS (Details 1) - Fair Value, Inputs, Level 3 [Member]
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Constant prepayment rate [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Measurements, Valuation Techniques Discounted cash flow Discounted cash flow
Fair Value Assumptions, Weighted Average Volatility Rate 13.70% 13.30%
Discount rate [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Assumptions, Weighted Average Volatility Rate 12.00% 12.00%
Fair Value Inputs, Discount Rate 12.00% 12.00%
Minimum [Member] | Constant prepayment rate [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Inputs, Prepayment Rate 8.00%  
Minimum [Member] | Discount rate [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Inputs, Prepayment Rate   6.50%
Maximum [Member] | Constant prepayment rate [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Inputs, Prepayment Rate 26.50%  
Maximum [Member] | Discount rate [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Inputs, Prepayment Rate   28.60%