XML 19 R1.htm IDEA: XBRL DOCUMENT v3.8.0.1
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Feb. 21, 2018
Jun. 30, 2017
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2017    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Trading Symbol BANC    
Entity Registrant Name BANC OF CALIFORNIA, INC.    
Entity Central Index Key 0001169770    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Public Float     $ 932.3
Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   50,083,262  
Class B Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   508,107