XML 105 R1.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2019
Feb. 14, 2020
Jun. 30, 2019
Cover page.      
Document Type 10-K    
Document Period End Date Dec. 31, 2019    
Document Annual Report true    
Document Transition Report false    
Entity File Number 001-36408    
Entity Registrant Name PACWEST BANCORP    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 33-0885320    
Entity Address, Address Line One 9701 Wilshire Blvd.    
Entity Address, Address Line Two Suite 700    
Entity Address, City or Town Beverly Hills    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 90212    
City Area Code 310    
Local Phone Number 887-8500    
Title of 12(b) Security Common Stock, par value $0.01 per share    
Trading Symbol PACW    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 4.5
Entity Common Stock, Shares Outstanding   116,859,317  
Entity Central Index Key 0001102112    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false    
Documents Incorporated by Reference [Text Block]
The information required by Items 10, 11, 12, 13 and 14 of Part III of this Annual Report on Form 10-K will be found in the Company's definitive proxy statement for its 2020 Annual Meeting of Stockholders, to be filed pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended, and such information is incorporated herein by this reference.