LOANS AND LEASES, Impaired (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	$ 156,728,000	$ 234,923,000
Unpaid Balance of Impaired Loans	206,072,000	287,099,000
Related Allowance for Credit Losses	10,541,000	39,708,000
Average Recorded Investment	196,921,000	309,604,000
Interest Income Recognized	1,550,000	5,049,000
Impaired loans [Abstract]
Impaired loans that were characterized as troubled debt restructurings	47,300,000	58,000,000
Construction, acquisition and development [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	61,335,000	128,179,000
Unpaid Balance of Impaired Loans	85,588,000	157,208,000
Related Allowance for Credit Losses	4,350,000	21,581,000
Average Recorded Investment	99,667,000	188,553,000
Interest Income Recognized	701,000	2,592,000
Construction, acquisition and development [Member] | Multi-family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	0	1,067,000
Unpaid Balance of Impaired Loans	0	2,259,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	0	6,045,000
Interest Income Recognized	0	18,000
Construction, acquisition and development [Member] | One-to-four family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	9,605,000	13,244,000
Unpaid Balance of Impaired Loans	15,061,000	15,396,000
Related Allowance for Credit Losses	290,000	1,589,000
Average Recorded Investment	12,164,000	14,603,000
Interest Income Recognized	82,000	202,000
Construction, acquisition and development [Member] | Recreation and all other loans collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,117,000	372,000
Unpaid Balance of Impaired Loans	1,335,000	545,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	692,000	762,000
Interest Income Recognized	5,000	11,000
Construction, acquisition and development [Member] | Commercial construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	5,714,000	5,020,000
Unpaid Balance of Impaired Loans	6,646,000	6,045,000
Related Allowance for Credit Losses	0	886,000
Average Recorded Investment	4,840,000	16,952,000
Interest Income Recognized	66,000	209,000
Construction, acquisition and development [Member] | Commercial acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	15,464,000	22,221,000
Unpaid Balance of Impaired Loans	17,746,000	27,583,000
Related Allowance for Credit Losses	563,000	1,418,000
Average Recorded Investment	21,351,000	33,605,000
Interest Income Recognized	137,000	528,000
Construction, acquisition and development [Member] | Residential acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	29,435,000	86,255,000
Unpaid Balance of Impaired Loans	44,800,000	105,380,000
Related Allowance for Credit Losses	3,497,000	17,688,000
Average Recorded Investment	60,620,000	116,586,000
Interest Income Recognized	411,000	1,624,000
Commercial and industrial segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	4,845,000	7,833,000
Unpaid Balance of Impaired Loans	6,457,000	10,155,000
Related Allowance for Credit Losses	1,241,000	4,071,000
Average Recorded Investment	8,147,000	7,437,000
Interest Income Recognized	50,000	127,000
Real estate segment [Member] | Consumer mortgages [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	15,107,000	31,793,000
Unpaid Balance of Impaired Loans	19,378,000	35,762,000
Related Allowance for Credit Losses	1,103,000	4,386,000
Average Recorded Investment	22,085,000	34,588,000
Interest Income Recognized	165,000	720,000
Real estate segment [Member] | Home equity [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,380,000	675,000
Unpaid Balance of Impaired Loans	1,524,000	1,047,000
Related Allowance for Credit Losses	111,000	48,000
Average Recorded Investment	1,427,000	1,045,000
Interest Income Recognized	11,000	4,000
Real estate segment [Member] | Agricultural [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	5,382,000	3,096,000
Unpaid Balance of Impaired Loans	7,239,000	4,223,000
Related Allowance for Credit Losses	92,000	380,000
Average Recorded Investment	4,995,000	5,666,000
Interest Income Recognized	20,000	38,000
Real estate segment [Member] | Commercial and industrial-owner occupied [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	16,720,000	24,801,000
Unpaid Balance of Impaired Loans	21,288,000	30,276,000
Related Allowance for Credit Losses	864,000	3,601,000
Average Recorded Investment	22,651,000	21,927,000
Interest Income Recognized	188,000	331,000
Real estate segment [Member] | Construction, acquisition and development [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	61,335,000	128,179,000
Unpaid Balance of Impaired Loans	85,588,000	157,208,000
Related Allowance for Credit Losses	4,350,000	21,581,000
Average Recorded Investment	99,667,000	188,553,000
Interest Income Recognized	701,000	2,592,000
Real estate segment [Member] | Commercial [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	50,413,000	36,122,000
Unpaid Balance of Impaired Loans	62,431,000	45,620,000
Related Allowance for Credit Losses	2,720,000	5,324,000
Average Recorded Investment	36,777,000	47,912,000
Interest Income Recognized	403,000	1,162,000
All other receivables [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,546,000	2,424,000
Unpaid Balance of Impaired Loans	2,167,000	2,808,000
Related Allowance for Credit Losses	60,000	317,000
Average Recorded Investment	1,172,000	2,476,000
Interest Income Recognized	12,000	75,000
With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	115,729,000	117,217,000
Unpaid Balance of Impaired Loans	160,772,000	154,678,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	106,357,000	167,615,000
Interest Income Recognized	758,000	2,000,000
With no related allowance [Member] | Construction, acquisition and development [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	47,982,000	69,843,000
Unpaid Balance of Impaired Loans	69,331,000	89,782,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	54,085,000	107,596,000
Interest Income Recognized	324,000	941,000
With no related allowance [Member] | Construction, acquisition and development [Member] | Multi-family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	0	1,067,000
Unpaid Balance of Impaired Loans	0	2,259,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	0	5,474,000
Interest Income Recognized	0	18,000
With no related allowance [Member] | Construction, acquisition and development [Member] | One-to-four family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	8,475,000	7,931,000
Unpaid Balance of Impaired Loans	13,586,000	9,313,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	8,070,000	9,269,000
Interest Income Recognized	53,000	94,000
With no related allowance [Member] | Construction, acquisition and development [Member] | Recreation and all other loans collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,117,000	372,000
Unpaid Balance of Impaired Loans	1,335,000	545,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	623,000	491,000
Interest Income Recognized	5,000	9,000
With no related allowance [Member] | Construction, acquisition and development [Member] | Commercial construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	5,714,000	633,000
Unpaid Balance of Impaired Loans	6,646,000	917,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	3,585,000	9,663,000
Interest Income Recognized	51,000	83,000
With no related allowance [Member] | Construction, acquisition and development [Member] | Commercial acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	13,753,000	17,130,000
Unpaid Balance of Impaired Loans	15,786,000	19,855,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	12,145,000	20,640,000
Interest Income Recognized	63,000	99,000
With no related allowance [Member] | Construction, acquisition and development [Member] | Residential acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	18,923,000	42,710,000
Unpaid Balance of Impaired Loans	31,978,000	56,893,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	29,662,000	62,059,000
Interest Income Recognized	152,000	638,000
With no related allowance [Member] | Commercial and industrial segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	2,557,000	4,874,000
Unpaid Balance of Impaired Loans	4,169,000	6,854,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	2,779,000	3,879,000
Interest Income Recognized	12,000	78,000
With no related allowance [Member] | Real estate segment [Member] | Consumer mortgages [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	11,307,000	16,883,000
Unpaid Balance of Impaired Loans	15,464,000	19,538,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	11,762,000	19,628,000
Interest Income Recognized	77,000	397,000
With no related allowance [Member] | Real estate segment [Member] | Home equity [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	934,000	627,000
Unpaid Balance of Impaired Loans	1,078,000	771,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	858,000	541,000
Interest Income Recognized	6,000	1,000
With no related allowance [Member] | Real estate segment [Member] | Agricultural [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	4,435,000	1,549,000
Unpaid Balance of Impaired Loans	6,292,000	2,676,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	3,527,000	2,502,000
Interest Income Recognized	8,000	20,000
With no related allowance [Member] | Real estate segment [Member] | Commercial and industrial-owner occupied [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	13,018,000	6,973,000
Unpaid Balance of Impaired Loans	16,551,000	9,191,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	12,674,000	11,598,000
Interest Income Recognized	123,000	185,000
With no related allowance [Member] | Real estate segment [Member] | Construction, acquisition and development [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	47,982,000	69,843,000
Unpaid Balance of Impaired Loans	69,331,000	89,782,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	54,085,000	107,596,000
Interest Income Recognized	324,000	941,000
With no related allowance [Member] | Real estate segment [Member] | Commercial [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	33,952,000	15,184,000
Unpaid Balance of Impaired Loans	45,722,000	24,198,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	19,824,000	20,702,000
Interest Income Recognized	199,000	311,000
With no related allowance [Member] | All other receivables [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,544,000	1,284,000
Unpaid Balance of Impaired Loans	2,165,000	1,668,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	848,000	1,169,000
Interest Income Recognized	9,000	67,000
With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	40,999,000	117,706,000
Unpaid Balance of Impaired Loans	45,300,000	132,421,000
Related Allowance for Credit Losses	10,541,000	39,708,000
Average Recorded Investment	90,564,000	141,989,000
Interest Income Recognized	792,000	3,049,000
With an allowance [Member] | Construction, acquisition and development [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	13,353,000	58,336,000
Unpaid Balance of Impaired Loans	16,257,000	67,426,000
Related Allowance for Credit Losses	4,350,000	21,581,000
Average Recorded Investment	45,582,000	80,957,000
Interest Income Recognized	377,000	1,651,000
With an allowance [Member] | Construction, acquisition and development [Member] | Multi-family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	0	0
Unpaid Balance of Impaired Loans	0	0
Related Allowance for Credit Losses	0	0
Average Recorded Investment	0	571,000
Interest Income Recognized	0	0
With an allowance [Member] | Construction, acquisition and development [Member] | One-to-four family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,130,000	5,313,000
Unpaid Balance of Impaired Loans	1,475,000	6,083,000
Related Allowance for Credit Losses	290,000	1,589,000
Average Recorded Investment	4,094,000	5,334,000
Interest Income Recognized	29,000	108,000
With an allowance [Member] | Construction, acquisition and development [Member] | Recreation and all other loans collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	0	0
Unpaid Balance of Impaired Loans	0	0
Related Allowance for Credit Losses	0	0
Average Recorded Investment	69,000	271,000
Interest Income Recognized	0	2,000
With an allowance [Member] | Construction, acquisition and development [Member] | Commercial construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	0	4,387,000
Unpaid Balance of Impaired Loans	0	5,128,000
Related Allowance for Credit Losses	0	886,000
Average Recorded Investment	1,255,000	7,289,000
Interest Income Recognized	15,000	126,000
With an allowance [Member] | Construction, acquisition and development [Member] | Commercial acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,711,000	5,091,000
Unpaid Balance of Impaired Loans	1,960,000	7,728,000
Related Allowance for Credit Losses	563,000	1,418,000
Average Recorded Investment	9,206,000	12,965,000
Interest Income Recognized	74,000	429,000
With an allowance [Member] | Construction, acquisition and development [Member] | Residential acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	10,512,000	43,545,000
Unpaid Balance of Impaired Loans	12,822,000	48,487,000
Related Allowance for Credit Losses	3,497,000	17,688,000
Average Recorded Investment	30,958,000	54,527,000
Interest Income Recognized	259,000	986,000
With an allowance [Member] | Commercial and industrial segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	2,288,000	2,959,000
Unpaid Balance of Impaired Loans	2,288,000	3,301,000
Related Allowance for Credit Losses	1,241,000	4,071,000
Average Recorded Investment	5,368,000	3,558,000
Interest Income Recognized	38,000	49,000
With an allowance [Member] | Real estate segment [Member] | Consumer mortgages [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	3,800,000	14,910,000
Unpaid Balance of Impaired Loans	3,914,000	16,224,000
Related Allowance for Credit Losses	1,103,000	4,386,000
Average Recorded Investment	10,323,000	14,960,000
Interest Income Recognized	88,000	323,000
With an allowance [Member] | Real estate segment [Member] | Home equity [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	446,000	48,000
Unpaid Balance of Impaired Loans	446,000	276,000
Related Allowance for Credit Losses	111,000	48,000
Average Recorded Investment	569,000	504,000
Interest Income Recognized	5,000	3,000
With an allowance [Member] | Real estate segment [Member] | Agricultural [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	947,000	1,547,000
Unpaid Balance of Impaired Loans	947,000	1,547,000
Related Allowance for Credit Losses	92,000	380,000
Average Recorded Investment	1,468,000	3,164,000
Interest Income Recognized	12,000	18,000
With an allowance [Member] | Real estate segment [Member] | Commercial and industrial-owner occupied [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	3,702,000	17,828,000
Unpaid Balance of Impaired Loans	4,737,000	21,085,000
Related Allowance for Credit Losses	864,000	3,601,000
Average Recorded Investment	9,977,000	10,329,000
Interest Income Recognized	65,000	146,000
With an allowance [Member] | Real estate segment [Member] | Construction, acquisition and development [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	13,353,000	58,336,000
Unpaid Balance of Impaired Loans	16,257,000	67,426,000
Related Allowance for Credit Losses	4,350,000	21,581,000
Average Recorded Investment	45,582,000	80,957,000
Interest Income Recognized	377,000	1,651,000
With an allowance [Member] | Real estate segment [Member] | Commercial [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	16,461,000	20,938,000
Unpaid Balance of Impaired Loans	16,709,000	21,422,000
Related Allowance for Credit Losses	2,720,000	5,324,000
Average Recorded Investment	16,953,000	27,210,000
Interest Income Recognized	204,000	851,000
With an allowance [Member] | All other receivables [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	2,000	1,140,000
Unpaid Balance of Impaired Loans	2,000	1,140,000
Related Allowance for Credit Losses	60,000	317,000
Average Recorded Investment	324,000	1,307,000
Interest Income Recognized	$ 3,000	$ 8,000