LOANS AND LEASES, Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Financial effects of TDRs [Abstract]
Number of Contracts	136	136
Pre-Modification Outstanding Recorded Investment	$ 58,378	$ 68,964
Post-Modification Outstanding Recorded Investment	56,042	58,697
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	58	34
Recorded Investment	13,139	13,004
Commercial and industrial segment [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	8	7
Pre-Modification Outstanding Recorded Investment	1,686	3,142
Post-Modification Outstanding Recorded Investment	1,348	2,374
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	2	4
Recorded Investment	179	1,506
Real estate segment [Member] | Consumer mortgages [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	38	35
Pre-Modification Outstanding Recorded Investment	9,875	6,901
Post-Modification Outstanding Recorded Investment	9,109	6,424
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	18	4
Recorded Investment	2,096	1,563
Real estate segment [Member] | Agricultural [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	2	4
Pre-Modification Outstanding Recorded Investment	853	2,650
Post-Modification Outstanding Recorded Investment	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 segment [Member] | Commercial and industrial-owner occupied [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	30	29
Pre-Modification Outstanding Recorded Investment	14,367	13,330
Post-Modification Outstanding Recorded Investment	13,741	11,740
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	11	6
Recorded Investment	2,659	1,683
Real estate segment [Member] | Construction, acquisition and development [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	37	30
Pre-Modification Outstanding Recorded Investment	21,583	23,863
Post-Modification Outstanding Recorded Investment	21,159	19,228
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	21	13
Recorded Investment	5,503	3,622
Real estate segment [Member] | Commercial [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	12	24
Pre-Modification Outstanding Recorded Investment	8,159	16,121
Post-Modification Outstanding Recorded Investment	8,132	15,046
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	4	3
Recorded Investment	2,525	2,946
All other receivables [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	9	7
Pre-Modification Outstanding Recorded Investment	1,855	2,957
Post-Modification Outstanding Recorded Investment	1,692	2,406
TDRs modified for which there was a payment default [Abstract]
Number of Contracts	1	1
Recorded Investment	$ 7	$ 302