Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Mar. 07, 2016	Jun. 30, 2015
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, 2015
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Is Entity a Well-known Seasoned Issuer?	No
Entity Voluntary Filers	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 326
Entity Common Stock, Shares Outstanding		16,347,750
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2015
Trading Symbol	PGC