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NATURE OF OPERATIONS - Narrative (Details)
Jun. 30, 2020
branch
office
Sonoma, Marin, Santa Clara, and Los Angeles Counties  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Number of full service branches 10
King County, Washington  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Number of full service branches 1
California  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Number of loan production offices | office 7