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FAIR VALUE (Details 2) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financial Assets/Liabilities
Total securities available-for-sale	$ 909,498	$ 867,760
Transfers of assets from Level 1 to Level 2	0		$ 0
Transfers of assets from Level 2 to Level 1	0		0
Transfer of liabilities from Level 1 to Level 2	0		0
Transfer of liabilities from Level 2 to Level 1	0		$ 0
U. S. government agency
Financial Assets/Liabilities
Total securities available-for-sale	543	661
State and municipal
Financial Assets/Liabilities
Total securities available-for-sale	348,816	334,298
Mortgage-backed securities-residential (Government Sponsored Entity)
Financial Assets/Liabilities
Total securities available-for-sale	303,845	182,172
Collateralized mortgage obligations (Government Sponsored Entity)
Financial Assets/Liabilities
Total securities available-for-sale	249,080	343,437
Equity securities
Financial Assets/Liabilities
Total securities available-for-sale	4,689	4,689
Other securities
Financial Assets/Liabilities
Total securities available-for-sale	2,525	2,503
Recurring basis \| Carrying Value
Financial Assets/Liabilities
Total securities available-for-sale	909,498	867,760
Mortgage banking derivatives	925	975
Recurring basis \| Carrying Value \| Interest Rate Swap
Financial Assets/Liabilities
Fair value, assets	1,798	56
Derivative liability, fair value	(1,798)	(56)
Recurring basis \| Carrying Value \| U. S. government agency
Financial Assets/Liabilities
Total securities available-for-sale	543	661
Recurring basis \| Carrying Value \| State and municipal
Financial Assets/Liabilities
Total securities available-for-sale	348,816	334,298
Recurring basis \| Carrying Value \| Mortgage-backed securities-residential (Government Sponsored Entity)
Financial Assets/Liabilities
Total securities available-for-sale	303,845	182,172
Recurring basis \| Carrying Value \| Collateralized mortgage obligations (Government Sponsored Entity)
Financial Assets/Liabilities
Total securities available-for-sale	249,080	343,437
Recurring basis \| Carrying Value \| Equity securities
Financial Assets/Liabilities
Total securities available-for-sale	4,689	4,689
Recurring basis \| Carrying Value \| Other securities
Financial Assets/Liabilities
Total securities available-for-sale	2,525	2,503
Recurring basis \| Fair Value \| Level 1
Financial Assets/Liabilities
Total securities available-for-sale	4,689	4,689
Recurring basis \| Fair Value \| Level 1 \| Equity securities
Financial Assets/Liabilities
Total securities available-for-sale	4,689	4,689
Recurring basis \| Fair Value \| Level 2
Financial Assets/Liabilities
Total securities available-for-sale	890,937	847,758
Mortgage banking derivatives	925	975
Recurring basis \| Fair Value \| Level 2 \| Interest Rate Swap
Financial Assets/Liabilities
Fair value, assets	1,798	56
Derivative liability, fair value	(1,798)	(56)
Recurring basis \| Fair Value \| Level 2 \| U. S. government agency
Financial Assets/Liabilities
Total securities available-for-sale	543	661
Recurring basis \| Fair Value \| Level 2 \| State and municipal
Financial Assets/Liabilities
Total securities available-for-sale	337,469	321,488
Recurring basis \| Fair Value \| Level 2 \| Mortgage-backed securities-residential (Government Sponsored Entity)
Financial Assets/Liabilities
Total securities available-for-sale	303,845	182,172
Recurring basis \| Fair Value \| Level 2 \| Collateralized mortgage obligations (Government Sponsored Entity)
Financial Assets/Liabilities
Total securities available-for-sale	249,080	343,437
Recurring basis \| Fair Value \| Level 3
Financial Assets/Liabilities
Total securities available-for-sale	13,872	15,313
Recurring basis \| Fair Value \| Level 3 \| State and municipal
Financial Assets/Liabilities
Total securities available-for-sale	11,347	12,810
Recurring basis \| Fair Value \| Level 3 \| Other securities
Financial Assets/Liabilities
Total securities available-for-sale	$ 2,525	$ 2,503