ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	$ 2,203,388	$ 2,233,709
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	1,763,480	1,771,778
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	44,700	33,276
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	106,062	131,286
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	289,146	297,369
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	829,019	751,364
Commercial Real Estate and Multi-family Residential Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	784,363	851,677
Agri-business and Agricultural Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	214,170	238,003
Consumer 1-4 Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	286,221	288,456
Working Capital Lines of Credit Loans [Member] | Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	446,148	373,892
Working Capital Lines of Credit Loans [Member] | Commercial and Industrial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	420,757	352,055
Working Capital Lines of Credit Loans [Member] | Commercial and Industrial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	12,274	5,625
Working Capital Lines of Credit Loans [Member] | Commercial and Industrial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	13,117	16,212
Working Capital Lines of Credit Loans [Member] | Commercial and Industrial Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Working Capital Lines of Credit Loans [Member] | Commercial and Industrial Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Non-working Capital Loans [Member] | Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	382,871	377,472
Non-working Capital Loans [Member] | Commercial and Industrial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	342,447	331,881
Non-working Capital Loans [Member] | Commercial and Industrial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	7,664	7,437
Non-working Capital Loans [Member] | Commercial and Industrial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	31,484	36,751
Non-working Capital Loans [Member] | Commercial and Industrial Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Non-working Capital Loans [Member] | Commercial and Industrial Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	1,276	1,403
Construction and Land Development Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	87,746	82,079
Construction and Land Development Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	71,130	64,808
Construction and Land Development Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	5,520	3,296
Construction and Land Development Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	11,096	13,976
Construction and Land Development Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Construction and Land Development Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Owner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	363,483	346,543
Owner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	334,835	318,191
Owner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	7,161	5,913
Owner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	21,437	22,400
Owner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Owner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	50	38
Nonowner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	332,753	384,681
Nonowner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	271,419	337,090
Nonowner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	9,827	8,875
Nonowner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	26,454	38,716
Nonowner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Nonowner Occupied Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Multifamily Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	25,434	38,374
Multifamily Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	24,235	37,127
Multifamily Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	1,199	1,247
Multifamily Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Multifamily Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Multifamily Loans [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Loans Secured By Farmland [Member] | Agri-business and Agricultural Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	119,537	118,247
Loans Secured By Farmland [Member] | Agri-business and Agricultural Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	118,012	116,742
Loans Secured By Farmland [Member] | Agri-business and Agricultural Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	70	70
Loans Secured By Farmland [Member] | Agri-business and Agricultural Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	1,436	1,415
Loans Secured By Farmland [Member] | Agri-business and Agricultural Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Loans Secured By Farmland [Member] | Agri-business and Agricultural Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	19	20
Loans For Agricultural Production [Member] | Agri-business and Agricultural Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	94,633	119,756
Loans For Agricultural Production [Member] | Agri-business and Agricultural Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	94,633	119,531
Loans For Agricultural Production [Member] | Agri-business and Agricultural Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Loans For Agricultural Production [Member] | Agri-business and Agricultural Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	225
Loans For Agricultural Production [Member] | Agri-business and Agricultural Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Loans For Agricultural Production [Member] | Agri-business and Agricultural Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Other Commerical Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	44,974	58,249
Other Commerical Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	44,856	58,061
Other Commerical Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	66
Other Commerical Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	118	120
Other Commerical Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Other Commerical Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	2
Closed End First Mortgage Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	105,899	106,784
Closed End First Mortgage Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	21,380	17,307
Closed End First Mortgage Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	329	53
Closed End First Mortgage Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	423	974
Closed End First Mortgage Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Closed End First Mortgage Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	83,767	88,450
Open End and Junior Lien Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	171,568	176,223
Open End and Junior Lien Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	11,494	11,569
Open End and Junior Lien Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	300	319
Open End and Junior Lien Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Open End and Junior Lien Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Open End and Junior Lien Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	157,253	164,335
Residential Construction and Land Development Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	11,275	5,449
Residential Construction and Land Development Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Residential Construction and Land Development Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Residential Construction and Land Development Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Residential Construction and Land Development Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Residential Construction and Land Development Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	11,275	5,449
Other Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	44,641	45,960
Other Consumer Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	8,282	7,416
Other Consumer Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	356	375
Other Consumer Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	497	497
Other Consumer Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	0	0
Other Consumer Loans [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance	$ 35,506	$ 37,672