LOANS AND ALLOWANCE (Details 6) (USD $) In Thousands, unless otherwise specified												3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Pass	Dec. 31, 2012 Pass	Mar. 31, 2013 Special Mention	Dec. 31, 2012 Special Mention	Mar. 31, 2013 Substandard	Dec. 31, 2012 Substandard	Mar. 31, 2013 Non-accrual	Dec. 31, 2012 Non-accrual	Mar. 31, 2013 Minimum	Mar. 31, 2013 Minimum Substandard	Mar. 31, 2013 Minimum Non-accrual	Mar. 31, 2013 Minimum Watch	Mar. 31, 2013 Minimum Loss	Mar. 31, 2013 Maximum Watch	Mar. 31, 2013 Consumer loans not secured by 1-4 family residential real estate Minimum Substandard	Mar. 31, 2013 Consumer loans not secured by 1-4 family residential real estate Maximum Substandard	Mar. 31, 2013 Commercial	Dec. 31, 2012 Commercial	Mar. 31, 2013 Commercial Commercial and industrial	Dec. 31, 2012 Commercial Commercial and industrial	Mar. 31, 2013 Commercial Commercial and industrial Pass	Dec. 31, 2012 Commercial Commercial and industrial Pass	Mar. 31, 2013 Commercial Commercial and industrial Special Mention	Dec. 31, 2012 Commercial Commercial and industrial Special Mention	Mar. 31, 2013 Commercial Commercial and industrial Substandard	Dec. 31, 2012 Commercial Commercial and industrial Substandard	Mar. 31, 2013 Commercial Commercial and industrial Non-accrual	Dec. 31, 2012 Commercial Commercial and industrial Non-accrual	Mar. 31, 2013 Commercial Agricultural	Dec. 31, 2012 Commercial Agricultural	Mar. 31, 2013 Commercial Agricultural Pass	Dec. 31, 2012 Commercial Agricultural Pass	Mar. 31, 2013 Commercial Agricultural Substandard	Dec. 31, 2012 Commercial Agricultural Substandard	Mar. 31, 2013 Commercial Real Estate	Dec. 31, 2012 Commercial Real Estate	Mar. 31, 2013 Commercial Real Estate Farm	Dec. 31, 2012 Commercial Real Estate Farm	Mar. 31, 2013 Commercial Real Estate Farm Pass	Dec. 31, 2012 Commercial Real Estate Farm Pass	Mar. 31, 2013 Commercial Real Estate Farm Special Mention	Dec. 31, 2012 Commercial Real Estate Farm Special Mention	Dec. 31, 2012 Commercial Real Estate Farm Substandard	Mar. 31, 2013 Commercial Real Estate Farm Non-accrual	Dec. 31, 2012 Commercial Real Estate Farm Non-accrual	Mar. 31, 2013 Commercial Real Estate Hotel	Dec. 31, 2012 Commercial Real Estate Hotel	Mar. 31, 2013 Commercial Real Estate Hotel Pass	Dec. 31, 2012 Commercial Real Estate Hotel Pass	Mar. 31, 2013 Commercial Real Estate Hotel Special Mention	Dec. 31, 2012 Commercial Real Estate Hotel Special Mention	Mar. 31, 2013 Commercial Real Estate Construction and development	Dec. 31, 2012 Commercial Real Estate Construction and development	Mar. 31, 2013 Commercial Real Estate Construction and development Pass	Dec. 31, 2012 Commercial Real Estate Construction and development Pass	Mar. 31, 2013 Commercial Real Estate Construction and development Special Mention	Dec. 31, 2012 Commercial Real Estate Construction and development Special Mention	Mar. 31, 2013 Commercial Real Estate Construction and development Substandard	Dec. 31, 2012 Commercial Real Estate Construction and development Substandard	Mar. 31, 2013 Commercial Real Estate Construction and development Non-accrual	Dec. 31, 2012 Commercial Real Estate Construction and development Non-accrual	Mar. 31, 2013 Commercial Real Estate Other	Dec. 31, 2012 Commercial Real Estate Other	Mar. 31, 2013 Commercial Real Estate Other Pass	Dec. 31, 2012 Commercial Real Estate Other Pass	Mar. 31, 2013 Commercial Real Estate Other Special Mention	Dec. 31, 2012 Commercial Real Estate Other Special Mention	Mar. 31, 2013 Commercial Real Estate Other Substandard	Dec. 31, 2012 Commercial Real Estate Other Substandard	Mar. 31, 2013 Commercial Real Estate Other Non-accrual	Dec. 31, 2012 Commercial Real Estate Other Non-accrual	Mar. 31, 2013 Residential	Dec. 31, 2012 Residential	Mar. 31, 2013 Residential Substandard	Dec. 31, 2012 Residential Substandard	Mar. 31, 2013 Residential Performing	Dec. 31, 2012 Residential Performing	Mar. 31, 2013 Residential Watch	Dec. 31, 2012 Residential Watch	Mar. 31, 2013 Residential 1-4 Family	Dec. 31, 2012 Residential 1-4 Family	Mar. 31, 2013 Residential 1-4 Family Substandard	Dec. 31, 2012 Residential 1-4 Family Substandard	Mar. 31, 2013 Residential 1-4 Family Performing	Dec. 31, 2012 Residential 1-4 Family Performing	Mar. 31, 2013 Residential 1-4 Family Watch	Dec. 31, 2012 Residential 1-4 Family Watch	Mar. 31, 2013 Residential Home equity	Dec. 31, 2012 Residential Home equity	Mar. 31, 2013 Residential Home equity Substandard	Dec. 31, 2012 Residential Home equity Substandard	Mar. 31, 2013 Residential Home equity Performing	Dec. 31, 2012 Residential Home equity Performing	Mar. 31, 2013 Residential Home equity Watch	Dec. 31, 2012 Residential Home equity Watch	Mar. 31, 2013 Consumer	Dec. 31, 2012 Consumer	Mar. 31, 2013 Consumer Substandard	Dec. 31, 2012 Consumer Substandard	Mar. 31, 2013 Consumer Performing	Dec. 31, 2012 Consumer Performing	Mar. 31, 2013 Consumer Loss	Dec. 31, 2012 Consumer Loss	Mar. 31, 2013 Consumer Direct	Dec. 31, 2012 Consumer Direct	Mar. 31, 2013 Consumer Direct Substandard	Dec. 31, 2012 Consumer Direct Substandard	Mar. 31, 2013 Consumer Direct Performing	Dec. 31, 2012 Consumer Direct Performing	Mar. 31, 2013 Consumer Direct Loss	Dec. 31, 2012 Consumer Direct Loss	Mar. 31, 2013 Consumer Indirect	Dec. 31, 2012 Consumer Indirect	Mar. 31, 2013 Consumer Indirect Substandard	Dec. 31, 2012 Consumer Indirect Substandard	Mar. 31, 2013 Consumer Indirect Performing	Dec. 31, 2012 Consumer Indirect Performing	Mar. 31, 2013 Consumer Indirect Loss	Dec. 31, 2012 Consumer Indirect Loss
Risk category of loans
Credit relationships with an outstanding balance											$ 1,000
Period for which principal and interest has been in default													90 days
Loans	$ 1,553,320	$ 1,553,383	$ 751,025	$ 747,342	$ 85,537	$ 87,977	$ 22,326	$ 28,785	$ 24,463	$ 22,460									$ 154,986	$ 156,511	$ 136,895	$ 134,156	$ 129,488	$ 119,755	$ 4,134	$ 9,824	$ 1,908	$ 2,800	$ 1,365	$ 1,777	$ 18,091	$ 22,355	$ 18,087	$ 22,350	$ 4	$ 5	$ 728,365	$ 730,053	$ 63,971	$ 66,119	$ 61,940	$ 63,294	$ 420	$ 1,094	$ 147	$ 1,611	$ 1,584	$ 127,027	$ 131,495	$ 77,272	$ 83,522	$ 49,755	$ 47,973	$ 27,994	$ 25,208	$ 22,484	$ 18,719	$ 1,395	$ 1,465	$ 2,567	$ 3,367	$ 1,548	$ 1,657	$ 509,373	$ 507,231	$ 441,754	$ 439,702	$ 29,833	$ 27,621	$ 17,847	$ 22,466	$ 19,939	$ 17,442	$ 625,998	$ 618,524	$ 5,557	$ 6,920	$ 618,801	$ 608,642	$ 1,640	$ 2,962	$ 403,083	$ 394,195	$ 4,082	$ 5,492	$ 397,732	$ 386,098	$ 1,269	$ 2,605	$ 222,915	$ 224,329	$ 1,475	$ 1,428	$ 221,069	$ 222,544	$ 371	$ 357	$ 43,971	$ 48,295	$ 87	$ 207	$ 43,823	$ 47,987	$ 61	$ 101	$ 42,032	$ 45,844	$ 86	$ 195	$ 41,890	$ 45,553	$ 56	$ 96	$ 1,939	$ 2,451	$ 1	$ 12	$ 1,933	$ 2,434	$ 5	$ 5
Period of loans past due												90 days		60 days	119 days	89 days	60 days	119 days