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FAIR VALUE - RECURRING LEVEL 3 MEASUREMENTS (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Fair value inputs quantitative information      
Aggregate fair value of consumer loan $ 3,679 $ 2,198 $ 415
Fair Value, Inputs, Level 3      
Fair value inputs quantitative information      
Aggregate fair value of consumer loan 3,679 2,198  
Recurring basis      
Fair value inputs quantitative information      
Aggregate fair value of consumer loan 3,679 2,198  
Recurring basis | Fair Value, Inputs, Level 3      
Fair value inputs quantitative information      
Aggregate fair value of consumer loan 3,679 2,198  
Consumer Loans Held For Sale      
Fair value inputs quantitative information      
Aggregate fair value of consumer loan 3,679 2,198  
Consumer Loans Held For Sale | Recurring basis | Fair Value, Inputs, Level 3      
Fair value inputs quantitative information      
Aggregate fair value of consumer loan $ 3,679 $ 2,198  
Consumer Loans Held For Sale | Contractual Terms | Recurring basis | Fair Value, Inputs, Level 3      
Fair value inputs quantitative information      
Net Premium (as a percent) 0.90% 0.90%  
Discount rate (as a percent) 5.00% 5.00%  
Private label mortgage backed security | Recurring basis | Fair Value, Inputs, Level 3      
Fair value inputs quantitative information      
Mortgage backed security fair value $ 4,682 $ 4,777  
Private label mortgage backed security | Discounted cash flow | Minimum | Recurring basis | Fair Value, Inputs, Level 3      
Fair value inputs quantitative information      
Constant prepayment rate (as a percent) 2.00% 2.00%  
Probability of default (as a percent) 3.00% 3.00%  
Loss severity (as a percent) 60.00% 60.00%  
Private label mortgage backed security | Discounted cash flow | Maximum | Recurring basis | Fair Value, Inputs, Level 3      
Fair value inputs quantitative information      
Constant prepayment rate (as a percent) 6.50% 6.50%  
Probability of default (as a percent) 9.00% 9.00%  
Loss severity (as a percent) 90.00% 90.00%