LOAN AND LEASES (5) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011
Financial effects of TDRs [Abstract]
Number of Contracts	21	113	136
Pre-Modification Outstanding Recorded Investment	$ 9,207	$ 51,972	$ 68,964
Post-Modification Outstanding Recorded Investment	9,068	49,851	58,697
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	19	49	34
Recorded Investment	1,751	11,800	13,004
Commercial and industrial segment [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	1	8	7
Pre-Modification Outstanding Recorded Investment	18	1,686	3,142
Post-Modification Outstanding Recorded Investment	18	1,348	2,374
TDRs modified for which there was a payment default [Abstract]
Number of Contracts		1	4
Recorded Investment		129	1,506
Real estate [Member] | Consumer mortgages [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	8	29	35
Pre-Modification Outstanding Recorded Investment	1,909	7,924	6,901
Post-Modification Outstanding Recorded Investment	1,802	7,174	6,424
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	6	16	4
Recorded Investment	488	1,856	1,563
Real estate [Member] | Agricultural [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	0	2	4
Pre-Modification Outstanding Recorded Investment	0	853	2,650
Post-Modification Outstanding Recorded Investment	0	861	1,479
TDRs modified for which there was a payment default [Abstract]
Number of Contracts		1	3
Recorded Investment		170	1,382
Real estate [Member] | Commercial and industrial-owner occupied [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	6	23	29
Pre-Modification Outstanding Recorded Investment	6,505	12,470	13,330
Post-Modification Outstanding Recorded Investment	6,476	11,847	11,740
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	1	6	6
Recorded Investment	0	1,610	1,683
Real estate [Member] | Construction, acquisition and development [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	3	35	30
Pre-Modification Outstanding Recorded Investment	220	20,921	23,863
Post-Modification Outstanding Recorded Investment	218	20,518	19,228
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	11	21	13
Recorded Investment	1,256	5,503	3,622
Real estate [Member] | Commercial Real Estate [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	1	9	24
Pre-Modification Outstanding Recorded Investment	368	7,293	16,121
Post-Modification Outstanding Recorded Investment	367	7,279	15,046
TDRs modified for which there was a payment default [Abstract]
Number of Contracts		3	3
Recorded Investment		2,525	2,946
All other receivables [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	2	7	7
Pre-Modification Outstanding Recorded Investment	187	825	2,957
Post-Modification Outstanding Recorded Investment	187	824	2,406
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	1	1	1
Recorded Investment	$ 7	$ 7	$ 302