CONDENSED FINANCIAL STATEMENTS OF PEAPACK-GLADSTONE FINANCIAL CORPORATION (PARENT COMPANY ONLY) (STATEMENTS OF CASH FLOWS) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 14,890	$ 9,261	$ 9,696
Gain on securities available for sale	(260)	(840)	(856)
Decrease/(increase) in other assets	2,590	5,643	(14,147)
(Decrease)/increase in other liabilities	1,153	2,315	1,342
Net cash provided by operating activities	27,263	32,702	17,848
Cash flows from investing activities:
Proceeds from sales and calls of securities available for sale	35,411	54,881	35,087
Net cash (used in)/provided by investing activities	(745,159)	(407,686)	6,944
Cash flows from financing activities:
Redemption of preferred stock			(14,341)
Repurchase of warrants			(109)
Cash dividends paid on preferred stock			(112)
Cash dividends paid on common stock	(2,414)	(1,802)	(1,774)
Exercise of stock options	174	30	21
Net proceeds, rights offering	48,358	41,100
Issuance of common shares (DRIP program)	7,429	3,248	625
Purchase of shares of profit sharing plan	70	130
Net cash provided by financing activities	713,956	290,903	51,383
Net (decrease)/increase in cash and cash equivalents	(3,940)	(84,081)	76,175
The Corporation [Member]
Cash flows from operating activities:
Net income	14,890	9,261	9,696
Undistributed (earnings)/loss of Bank	(15,310)	(8,279)	5,049
Gain on securities available for sale		(2)	(3)
Decrease/(increase) in other assets	427	(37)	(101)
(Decrease)/increase in other liabilities	(63)	179	107
Net cash provided by operating activities	(56)	1,122	14,748
Cash flows from investing activities:
Capital contribution to subsidiary	(88,674)
Proceeds from sales and calls of securities available for sale		213	386
Net cash (used in)/provided by investing activities	(88,674)	213	386
Cash flows from financing activities:
Redemption of preferred stock			(14,341)
Repurchase of warrants			(109)
Cash dividends paid on preferred stock			(112)
Cash dividends paid on common stock	(2,414)	(1,802)	(1,774)
Exercise of stock options	174	30	21
Net proceeds, rights offering	48,358	41,100
Issuance of common shares (DRIP program)	7,429	3,248	625
Purchase of shares of profit sharing plan	70	130
Net cash provided by financing activities	53,617	42,706	(15,690)
Net (decrease)/increase in cash and cash equivalents	(35,113)	44,041	(556)
Cash and cash equivalents at beginning of period	44,940	899	1,455
Cash and cash equivalents at end of period	$ 9,827	$ 44,940	$ 899