LOANS AND LEASES, Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2013 contract	Jun. 30, 2013 contract	Dec. 31, 2012 contract
Financial effects of TDRs [Abstract]
Number of Contracts	21	27	136
Pre-Modification Outstanding Recorded Investment	$ 3,940	$ 4,743	$ 58,378
Post-Modification Outstanding Recorded Investment	3,914	4,719	56,042
TDRs modified for which there was a payment default [Abstract]
Number of Contracts		17	58
Recorded Investment		5,903	13,139
Home Equity [Member]
Financial effects of TDRs [Abstract]
Number of Contracts		1
Pre-Modification Outstanding Recorded Investment		15
Post-Modification Outstanding Recorded Investment		15
Commercial and industrial segment [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	1	2	8
Pre-Modification Outstanding Recorded Investment	36	83	1,686
Post-Modification Outstanding Recorded Investment	37	84	1,348
TDRs modified for which there was a payment default [Abstract]
Number of Contracts		3	2
Recorded Investment		129	179
Real estate segment [Member] | Consumer mortgages [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	6	6	38
Pre-Modification Outstanding Recorded Investment	781	781	9,875
Post-Modification Outstanding Recorded Investment	780	780	9,109
TDRs modified for which there was a payment default [Abstract]
Number of Contracts		5	18
Recorded Investment		451	2,096
Real estate segment [Member] | Agricultural [Member]
Financial effects of TDRs [Abstract]
Number of Contracts			2
Pre-Modification Outstanding Recorded Investment			853
Post-Modification Outstanding Recorded Investment			861
TDRs modified for which there was a payment default [Abstract]
Number of Contracts			1
Recorded Investment			170
Real estate segment [Member] | Commercial and industrial-owner occupied [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	2	5	30
Pre-Modification Outstanding Recorded Investment	555	1,128	14,367
Post-Modification Outstanding Recorded Investment	551	1,127	13,741
TDRs modified for which there was a payment default [Abstract]
Number of Contracts		3	11
Recorded Investment		265	2,659
Real estate segment [Member] | Construction, acquisition and development [Member]
Financial effects of TDRs [Abstract]
Number of Contracts	12	12	37
Pre-Modification Outstanding Recorded Investment	2,568	2,568	21,583
Post-Modification Outstanding Recorded Investment	2,546	2,546	21,159
TDRs modified for which there was a payment default [Abstract]
Number of Contracts		2	21
Recorded Investment		1,523	5,503
Real estate segment [Member] | Commercial real estate [Member]
Financial effects of TDRs [Abstract]
Number of Contracts		1	12
Pre-Modification Outstanding Recorded Investment		168	8,159
Post-Modification Outstanding Recorded Investment		167	8,132
TDRs modified for which there was a payment default [Abstract]
Number of Contracts		3	4
Recorded Investment		3,534	2,525
All other [Member]
Financial effects of TDRs [Abstract]
Number of Contracts			9
Pre-Modification Outstanding Recorded Investment			1,855
Post-Modification Outstanding Recorded Investment			1,692
TDRs modified for which there was a payment default [Abstract]
Number of Contracts		1	1
Recorded Investment		$ 1	$ 7