FAIR VALUE - Inputs and Valuation technique (Details)	Sep. 30, 2019	Dec. 31, 2018
Discount Rate
Fair value measurement inputs and valuation techniques
Servicing asset measurement input	14
Discount Rate | Minimum
Fair value measurement inputs and valuation techniques
Servicing asset measurement input		11
Discount Rate | Minimum | Obligations of U.S. Government entities and agencies
Fair value measurement inputs and valuation techniques
Available for sale securities measurement input	0	0
Discount Rate | Minimum | SBA servicing assets and Interest only strip
Fair value measurement inputs and valuation techniques
Servicing asset measurement input	4.47	8.78
Discount Rate | Maximum
Fair value measurement inputs and valuation techniques
Servicing asset measurement input		14
Discount Rate | Maximum | Obligations of U.S. Government entities and agencies
Fair value measurement inputs and valuation techniques
Available for sale securities measurement input	3	3
Discount Rate | Maximum | SBA servicing assets and Interest only strip
Fair value measurement inputs and valuation techniques
Servicing asset measurement input	12.21	14.56
Prepayment speed
Fair value measurement inputs and valuation techniques
Servicing asset measurement input	18	15
Prepayment speed | Minimum | SBA servicing assets and Interest only strip
Fair value measurement inputs and valuation techniques
Servicing asset measurement input	10.72	6.82
Prepayment speed | Maximum | SBA servicing assets and Interest only strip
Fair value measurement inputs and valuation techniques
Servicing asset measurement input	15.90	12.87