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FAIR VALUE MEASUREMENTS - Unobservable Inputs Recurring (Details) - Level 3 - Recurring
12 Months Ended
Dec. 31, 2018
USD ($)
Quantitative information about the significant unobservable inputs within Level 3  
Total $ 8,000
Interest Rate Lock Commitment  
Quantitative information about the significant unobservable inputs within Level 3  
Derivative asset (liability), fair value $ 8,000
Interest Rate Lock Commitment | Pricing Model  
Quantitative information about the significant unobservable inputs within Level 3  
Closing Ratio 90.00%
Origination Costs, per loan $ 1,700
Forward Commitments  
Quantitative information about the significant unobservable inputs within Level 3  
Derivative asset (liability), fair value $ 0