Business Combination (Details Textual) (USD $)	12 Months Ended		3 Months Ended	9 Months Ended		0 Months Ended	3 Months Ended	9 Months Ended	0 Months Ended
	Dec. 31, 2012 Acquisitions	Sep. 30, 2013	Sep. 30, 2013 NCB [Member]	Sep. 30, 2013 NCB [Member] Branch	Jan. 09, 2013 NCB [Member]	Jul. 15, 2013 Valley [Member] Branch	Sep. 30, 2013 Valley [Member]	Sep. 30, 2013 Valley [Member]	Jul. 15, 2013 To be Maintained [Member] Valley [Member] Branch	Jul. 15, 2013 To be Disposed [Member] Valley [Member] Branch	Jul. 15, 2013 To be Terminated [Member] Valley [Member] Branch	Jul. 15, 2013 Held-for-sale [Member] Valley [Member] Branch
Business Combination (Textual) [Abstract]
Number of acquisitions completed	0
Number of branches acquired				2
Redemption of preferred stock outstanding					$ 2,000,000
NCB acquisition date				Jan. 09, 2013
Consideration transferred					(2,967,000)	(46,323,000)
Cash consideration per share (in usd per share)					$ 5.50	$ 19.50
Proceeds from sales of other real estate owned				491,000
Acquisition related costs			5,000	746,000			161,000	515,000
Number of branches operating						8			4	4	3	1
Business acquisition, common stock issued per Valley share						1.3611
Business acquisition, cash paid						22,000,000
Business acquisition, number of shares issued						1,533,267
Fair value of shares issued						24,200,000
Capitalized acquisition costs related to the issuance of securities						157,000
Goodwill	$ 13,012,000	$ 29,365,000				$ 16,400,000