GOODWILL AND OTHER INTANGIBLE ASSETS (Details 2) (USD $)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2013 Forecast
OTHER INTANGIBLE ASSETS
Amortization	$ 1,512,000	$ 1,284,000	$ 1,678,000	$ 3,972,000	$ 5,150,000	$ 5,400,000
Estimated aggregate amortization expense
2014	5,300,000			5,300,000
2015	4,800,000			4,800,000
2016	3,000,000			3,000,000
2017	1,600,000			1,600,000
2018	1,300,000			1,300,000
Gross amount of CDI and CRI:
Balance, beginning of period	53,339,000	45,412,000	62,272,000	45,412,000	67,100,000
Additions		7,927,000	1,924,000	7,927,000	4,924,000
Fully amortized portion	(4,376,000)		(12,918,000)	(4,376,000)	(20,746,000)
Removal due to branch sale			(5,866,000)		(5,866,000)
Balance, end of period	48,963,000	53,339,000	45,412,000	48,963,000	45,412,000
Accumulated Amortization:
Balance, beginning of period	(33,149,000)	(31,865,000)	(45,329,000)	(30,689,000)	(49,685,000)
Amortization	(1,512,000)	(1,284,000)	(1,678,000)	(3,972,000)	(5,150,000)	(5,400,000)
Fully amortized portion	4,376,000		12,918,000	4,376,000	20,746,000
Removal due to branch sale			4,576,000		4,576,000
Balance, end of period	(30,285,000)	(33,149,000)	(29,513,000)	(30,285,000)	(29,513,000)
Finite lived intangible assets, net
Net CDI and CRI, end of year	$ 18,678,000	$ 20,190,000	$ 15,899,000	$ 18,678,000	$ 15,899,000