SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONCENTRATION (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Mortgage Banking Activities | |||
| Initial amortization period of MSRs | 7 years | ||
| Impairment in MSR portfolio | $ 0 | $ 0 | |
| Loan servicing income | $ 1,983 | $ 1,896 | $ 1,752 |
| Geographic concentration risk | California | |||
| Concentration of credit risk | |||
| Percentage of concentration risk | 75.00% | ||
| Warehouse lines of credit | Geographic concentration risk | California | |||
| Concentration of credit risk | |||
| Percentage of concentration risk | 25.00% | ||
| Net income | Geographic concentration risk | RPG | TRS division | |||
| Concentration of credit risk | |||
| Percentage of concentration risk | 20.00% | 13.00% | 12.00% |
| Net income | Geographic concentration risk | Warehouse Lending | |||
| Concentration of credit risk | |||
| Percentage of concentration risk | 8.00% | 7.00% | 5.00% |