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DERIVATIVE INSTRUMENTS - Notional Amounts and Fair Values of Derivatives (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Interest rate lock commitments    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 15,130 $ 3,429
Asset 373 95
Liability $ 0 0
Interest rate caps    
Derivatives, Fair Value [Line Items]    
Notional Amount   100,000
Asset   4
Liability   0
Embedded conversion options    
Derivatives, Fair Value [Line Items]    
Notional Amount   180,252
Asset   0
Liability   $ 41,697