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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Dec. 31, 2015
Acquired Indefinite-lived Intangible Assets [Line Items]      
Equity Method Investments $ 0.1 $ 0.6  
Cost Method Investments $ 9.2 $ 6.5  
Gentry Home Loans L L C      
Acquired Indefinite-lived Intangible Assets [Line Items]      
Percentage of equity method investment ownership interest 50.00%    
Pacific Access Mortgage L L C      
Acquired Indefinite-lived Intangible Assets [Line Items]      
Percentage of equity method investment ownership interest 50.00%    
Haseko Home Loans L L C      
Acquired Indefinite-lived Intangible Assets [Line Items]      
Percentage of equity method investment ownership interest 50.00%    
Island Pacific HomeLoans, LLC      
Acquired Indefinite-lived Intangible Assets [Line Items]      
Percentage of equity method investment ownership interest 50.00%    
Primary Beneficiary | One Hawaii HomeLoans, LLC      
Acquired Indefinite-lived Intangible Assets [Line Items]      
Ownership interest acquired     50.00%