XML 11 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2018
Nov. 01, 2018
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
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 Small Business false  
Entity Emerging Growth Company false  
Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   50,175,340
Class B Non-Voting Non-Convertible Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   477,321