XML 16 R1.htm IDEA: XBRL DOCUMENT v3.8.0.1
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Mar. 01, 2018
Jun. 30, 2017
Document And Entity Information      
Entity Registrant Name PEAPACK GLADSTONE FINANCIAL CORP    
Entity Central Index Key 0001050743    
Document Type 10-K    
Document Period End Date Dec. 31, 2017    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Is Entity a Well-known Seasoned Issuer? No    
Is Entity a Voluntary Filer? No    
Is Entity's Reporting Status Current? Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 526
Entity Common Stock, Shares Outstanding   18,946,564  
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2017    
Trading Symbol PGC