ACQUISITIONS (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Nov. 09, 2012		Dec. 31, 2011
Business Acquisition [Line Items]
Contractually required principal and interest at acquisition		$ 47,548	[1]
Contractual cash flows not expected to be collected		(8,733)
Expected cash flows at acquisition		38,815	[1]
Interest component of expected cash flows	(2,464)	(3,095)		0
Basis in PCI loans at acquisition - estimated fair value	32,054	35,720
Central Bankcorp, Inc. [Member]
Business Acquisition [Line Items]
Contractually required principal and interest at acquisition		47,548
Contractual cash flows not expected to be collected		(8,733)
Expected cash flows at acquisition		38,815
Interest component of expected cash flows		(3,095)
Basis in PCI loans at acquisition - estimated fair value		$ 35,720

[1] Reflective of anticipated prepayments.