INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Finite-Lived Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended
	Sep. 30, 2013 acquisition	Dec. 31, 2007 acquisition	Sep. 30, 2013 Core Deposit Intangibles [Member]	Dec. 31, 2012 Core Deposit Intangibles [Member]	Sep. 30, 2013 Minimum [Member] Core Deposit Intangibles [Member]	Sep. 30, 2013 Maximum [Member] Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Number of Bank Acquisitions, Created Finite-Lived Intangible Asset	1	3
Finite-Lived Intangible Asset, Useful Life					3 years	8 years
Finite-lived Intangible Assets [Roll Forward]
Balance, beginning of period			$ 4,230	$ 6,322
Finite-lived Intangible Assets Acquired			160
Amortization			(1,453)	(2,092)
Balance, end of period			$ 2,937	$ 4,230