LOAN AND LEASES (5) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Financial effects of TDRs [Abstract]
Number of Contracts	43	92	136
Pre-Modification Outstanding Recorded Investment	$ 24,856	$ 42,766	$ 68,964
Post-Modification Outstanding Recorded Investment	23,612	40,783	58,697
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	17	30	34
Recorded Investment	6,357	10,050	13,004
Commercial and industrial segment [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	2	7	7
Pre-Modification Outstanding Recorded Investment	658	1,668	3,142
Post-Modification Outstanding Recorded Investment	656	1,330	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]
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	1	3	3
Recorded Investment	1,011	2,525	2,946
Real estate [Member] | Consumer mortgages [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	8	21	35
Pre-Modification Outstanding Recorded Investment	2,750	6,016	6,901
Post-Modification Outstanding Recorded Investment	2,162	5,373	6,424
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	4	10	4
Recorded Investment	850	1,368	1,563
Real estate [Member] | Agricultural [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	1	2	4
Pre-Modification Outstanding Recorded Investment	446	853	2,650
Post-Modification Outstanding Recorded Investment	457	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	9	17	29
Pre-Modification Outstanding Recorded Investment	3,837	5,965	13,330
Post-Modification Outstanding Recorded Investment	3,254	5,371	11,740
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	2	5	6
Recorded Investment	248	1,610	1,683
Real estate [Member] | Construction, acquisition and development [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	21	32	30
Pre-Modification Outstanding Recorded Investment	13,421	20,701	23,863
Post-Modification Outstanding Recorded Investment	13,343	20,299	19,228
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	10	10	13
Recorded Investment	4,248	4,248	3,622
Real estate [Member] | Commercial Real Estate [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	2	8	24
Pre-Modification Outstanding Recorded Investment	3,744	6,924	16,121
Post-Modification Outstanding Recorded Investment	3,740	6,912	15,046
All other receivables [Member]
Financial effects of TDRs [Abstract]
Number of Contracts		5	7
Pre-Modification Outstanding Recorded Investment		639	2,957
Post-Modification Outstanding Recorded Investment		637	2,406
TDRs modified for which there was a payment default [Abstract]
Number of Contracts			1
Recorded Investment			$ 302