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FAIR VALUE - Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Details) - Retained Interest [Member] - USD ($)
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Balance $ 653,000 $ 1,114,000
Gain (loss) Included in Earnings (252,000) 304,000
Collections 401,000 774,000
Ending Balance $ 0 $ 644,000