GOODWILL AND OTHER INTANGIBLE ASSETS (Details 2) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2013 Forecast
OTHER INTANGIBLE ASSETS
Amortization	$ 1,176,000	$ 1,176,000	$ 1,735,000	$ 4,500,000
Finite lived intangible assets
Remaining weighted average amortization period	2 years 4 months 24 days
Estimated aggregate amortization expense related to the intangible assets
2014	3,800,000
2015	3,500,000
2016	1,800,000
2017	587,000
2018	359,000
Gross amount of CDI and CRI:
Balance, beginning of year	45,412,000	45,412,000	67,100,000
Additions			1,700,000
Fully amortized portion			(7,828,000)
Balance, end of year	45,412,000	45,412,000	60,972,000
Accumulated Amortization:
Balance, beginning of year	(30,689,000)	(29,513,000)	(49,685,000)
Amortization	(1,176,000)	(1,176,000)	(1,735,000)	(4,500,000)
Fully amortized portion			7,828,000
Balance, end of year	(31,865,000)	(30,689,000)	(43,592,000)
Finite lived intangible assets, net
Net CDI and CRI, end of year	$ 13,547,000	$ 14,723,000	$ 17,380,000