CONDENSED FINANCIAL STATEMENTS OF PEAPACK-GLADSTONE FINANCIAL CORPORATION (PARENT COMPANY ONLY) (STATEMENTS OF INCOME) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income
Other income													$ 20,807	$ 20,595	$ 21,303
Securities gains, net	44	39	79	98	125	188	238	289	3,078	235	107	390	260	840	3,810
Expenses
Other expenses													13,336	13,020	11,268
Total operating expenses	15,578	14,693	14,930	14,339	14,646	14,165	14,079	12,293	13,553	11,993	11,704	11,080	59,540	55,183	48,330
Income before income tax expense	6,811	6,257	6,316	4,902	3,530	3,240	3,105	4,888	2,031	4,666	4,370	5,034	24,286	14,763	16,101
Income tax benefit	2,599	2,393	2,533	1,871	1,135	1,276	1,096	1,995	973	1,834	1,647	1,951	9,396	5,502	6,405
Net income	4,212	3,864	3,783	3,031	2,395	1,964	2,009	2,893	1,058	2,832	2,723	3,083	14,890	9,261	9,696
Dividends on preferred stock and accretion												474			474
Net income available to common shareholders	4,212	3,864	3,783	3,031	2,395	1,964	2,009	2,893	1,058	2,832	2,723	2,609	14,890	9,261	9,222
The Corporation [Member]
Income
Dividend from Bank														1,350	14,950
Other income													1	9	28
Securities gains, net														2	3
Total income													1	1,361	14,981
Expenses
Other expenses													637	429	352
Total operating expenses													637	429	352
Income before income tax expense													(636)	932	14,629
Income tax benefit													(216)	(50)	(116)
Net (loss)/income before equity in undistributed earnings of Bank													(420)	982	14,745
Equity in undistributed earnings of Bank/(dividends in excess of earnings)													15,310	8,279	(5,049)
Net income													14,890	9,261	9,696
Dividends on preferred stock and accretion															474
Net income available to common shareholders													$ 14,890	$ 9,261	$ 9,222