LOANS AND LEASES, Impaired (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	$ 234,923,000	$ 273,405,000
Unpaid Balance of Impaired Loans	287,099,000	345,377,000
Related Allowance for Credit Losses	39,708,000	40,719,000
Average Recorded Investment	309,604,000	218,800,000
Interest Income Recognized	5,049,000
Impaired loans [Abstract]
Impaired loans that were characterized as troubled debt restructurings	58,000,000	63,700,000
Commercial and industrial segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	7,833,000	2,136,000
Unpaid Balance of Impaired Loans	10,155,000	3,577,000
Related Allowance for Credit Losses	4,071,000	125,000
Average Recorded Investment	7,437,000
Interest Income Recognized	127,000
Real estate segment [Member] | Consumer mortgages [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	31,793,000	28,223,000
Unpaid Balance of Impaired Loans	35,762,000	30,917,000
Related Allowance for Credit Losses	4,386,000	4,226,000
Average Recorded Investment	34,588,000
Interest Income Recognized	720,000
Real estate segment [Member] | Home equity [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	675,000	851,000
Unpaid Balance of Impaired Loans	1,047,000	1,190,000
Related Allowance for Credit Losses	48,000	41,000
Average Recorded Investment	1,045,000
Interest Income Recognized	4,000
Real estate segment [Member] | Agricultural [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	3,096,000	4,295,000
Unpaid Balance of Impaired Loans	4,223,000	5,113,000
Related Allowance for Credit Losses	380,000	544,000
Average Recorded Investment	5,666,000
Interest Income Recognized	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	24,801,000	16,073,000
Unpaid Balance of Impaired Loans	30,276,000	17,669,000
Related Allowance for Credit Losses	3,601,000	1,361,000
Average Recorded Investment	21,927,000
Interest Income Recognized	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	128,179,000	184,918,000
Unpaid Balance of Impaired Loans	157,208,000	244,476,000
Related Allowance for Credit Losses	21,581,000	29,195,000
Average Recorded Investment	188,553,000
Interest Income Recognized	2,592,000
Real estate segment [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	1,067,000	10,197,000
Unpaid Balance of Impaired Loans	2,259,000	16,953,000
Related Allowance for Credit Losses	0	4,000
Average Recorded Investment	6,045,000
Interest Income Recognized	18,000
Real estate segment [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	13,244,000	18,450,000
Unpaid Balance of Impaired Loans	15,396,000	26,595,000
Related Allowance for Credit Losses	1,589,000	932,000
Average Recorded Investment	14,603,000
Interest Income Recognized	202,000
Real estate segment [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	372,000	890,000
Unpaid Balance of Impaired Loans	545,000	1,078,000
Related Allowance for Credit Losses	0	148,000
Average Recorded Investment	762,000
Interest Income Recognized	11,000
Real estate segment [Member] | Construction, acquisition and development [Member] | Commercial construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	5,020,000	23,630,000
Unpaid Balance of Impaired Loans	6,045,000	25,674,000
Related Allowance for Credit Losses	886,000	5,246,000
Average Recorded Investment	16,952,000
Interest Income Recognized	209,000
Real estate segment [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	22,221,000	29,472,000
Unpaid Balance of Impaired Loans	27,583,000	34,076,000
Related Allowance for Credit Losses	1,418,000	8,424,000
Average Recorded Investment	33,605,000
Interest Income Recognized	528,000
Real estate segment [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	86,255,000	102,279,000
Unpaid Balance of Impaired Loans	105,380,000	140,100,000
Related Allowance for Credit Losses	17,688,000	14,441,000
Average Recorded Investment	116,586,000
Interest Income Recognized	1,624,000
Real estate segment [Member] | Commercial [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	36,122,000	36,207,000
Unpaid Balance of Impaired Loans	45,620,000	41,504,000
Related Allowance for Credit Losses	5,324,000	5,227,000
Average Recorded Investment	47,912,000
Interest Income Recognized	1,162,000
All other receivables [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	2,424,000	702,000
Unpaid Balance of Impaired Loans	2,808,000	931,000
Related Allowance for Credit Losses	317,000	0
Average Recorded Investment	2,476,000
Interest Income Recognized	75,000
With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	117,217,000	122,035,000
Unpaid Balance of Impaired Loans	154,678,000	174,201,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	167,615,000
Interest Income Recognized	2,000,000
With no related allowance [Member] | Commercial and industrial segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	4,874,000	1,457,000
Unpaid Balance of Impaired Loans	6,854,000	2,600,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	3,879,000
Interest Income Recognized	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	16,883,000	11,228,000
Unpaid Balance of Impaired Loans	19,538,000	14,273,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	19,628,000
Interest Income Recognized	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	627,000	290,000
Unpaid Balance of Impaired Loans	771,000	629,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	541,000
Interest Income Recognized	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	1,549,000	1,439,000
Unpaid Balance of Impaired Loans	2,676,000	1,981,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	2,502,000
Interest Income Recognized	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	6,973,000	10,920,000
Unpaid Balance of Impaired Loans	9,191,000	12,371,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	11,598,000
Interest Income Recognized	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	69,843,000	80,204,000
Unpaid Balance of Impaired Loans	89,782,000	120,938,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	107,596,000
Interest Income Recognized	941,000
With no related allowance [Member] | Real estate segment [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	1,067,000	8,293,000
Unpaid Balance of Impaired Loans	2,259,000	9,975,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	5,474,000
Interest Income Recognized	18,000
With no related allowance [Member] | Real estate segment [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	7,931,000	6,511,000
Unpaid Balance of Impaired Loans	9,313,000	11,749,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	9,269,000
Interest Income Recognized	94,000
With no related allowance [Member] | Real estate segment [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	372,000	392,000
Unpaid Balance of Impaired Loans	545,000	580,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	491,000
Interest Income Recognized	9,000
With no related allowance [Member] | Real estate segment [Member] | Construction, acquisition and development [Member] | Commercial construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	633,000	11,171,000
Unpaid Balance of Impaired Loans	917,000	13,062,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	9,663,000
Interest Income Recognized	83,000
With no related allowance [Member] | Real estate segment [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	17,130,000	7,897,000
Unpaid Balance of Impaired Loans	19,855,000	12,501,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	20,640,000
Interest Income Recognized	99,000
With no related allowance [Member] | Real estate segment [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	42,710,000	45,940,000
Unpaid Balance of Impaired Loans	56,893,000	73,071,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	62,059,000
Interest Income Recognized	638,000
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	15,184,000	15,795,000
Unpaid Balance of Impaired Loans	24,198,000	20,478,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	20,702,000
Interest Income Recognized	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	1,284,000	702,000
Unpaid Balance of Impaired Loans	1,668,000	931,000
Related Allowance for Credit Losses	0	0
Average Recorded Investment	1,169,000
Interest Income Recognized	67,000
With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	117,706,000	151,370,000
Unpaid Balance of Impaired Loans	132,421,000	171,176,000
Related Allowance for Credit Losses	39,708,000	40,719,000
Average Recorded Investment	141,989,000
Interest Income Recognized	3,049,000
With an allowance [Member] | Commercial and industrial segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	2,959,000	679,000
Unpaid Balance of Impaired Loans	3,301,000	977,000
Related Allowance for Credit Losses	4,071,000	125,000
Average Recorded Investment	3,558,000
Interest Income Recognized	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	14,910,000	16,995,000
Unpaid Balance of Impaired Loans	16,224,000	16,644,000
Related Allowance for Credit Losses	4,386,000	4,226,000
Average Recorded Investment	14,960,000
Interest Income Recognized	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	48,000	561,000
Unpaid Balance of Impaired Loans	276,000	561,000
Related Allowance for Credit Losses	48,000	41,000
Average Recorded Investment	504,000
Interest Income Recognized	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	1,547,000	2,856,000
Unpaid Balance of Impaired Loans	1,547,000	3,132,000
Related Allowance for Credit Losses	380,000	544,000
Average Recorded Investment	3,164,000
Interest Income Recognized	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	17,828,000	5,153,000
Unpaid Balance of Impaired Loans	21,085,000	5,298,000
Related Allowance for Credit Losses	3,601,000	1,361,000
Average Recorded Investment	10,329,000
Interest Income Recognized	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	58,336,000	104,714,000
Unpaid Balance of Impaired Loans	67,426,000	123,538,000
Related Allowance for Credit Losses	21,581,000	29,195,000
Average Recorded Investment	80,957,000
Interest Income Recognized	1,651,000
With an allowance [Member] | Real estate segment [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	1,904,000
Unpaid Balance of Impaired Loans	0	6,978,000
Related Allowance for Credit Losses	0	4,000
Average Recorded Investment	571,000
Interest Income Recognized	0
With an allowance [Member] | Real estate segment [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	5,313,000	11,939,000
Unpaid Balance of Impaired Loans	6,083,000	14,846,000
Related Allowance for Credit Losses	1,589,000	932,000
Average Recorded Investment	5,334,000
Interest Income Recognized	108,000
With an allowance [Member] | Real estate segment [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	498,000
Unpaid Balance of Impaired Loans	0	498,000
Related Allowance for Credit Losses	0	148,000
Average Recorded Investment	271,000
Interest Income Recognized	2,000
With an allowance [Member] | Real estate segment [Member] | Construction, acquisition and development [Member] | Commercial construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	4,387,000	12,459,000
Unpaid Balance of Impaired Loans	5,128,000	12,612,000
Related Allowance for Credit Losses	886,000	5,246,000
Average Recorded Investment	7,289,000
Interest Income Recognized	126,000
With an allowance [Member] | Real estate segment [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	5,091,000	21,575,000
Unpaid Balance of Impaired Loans	7,728,000	21,575,000
Related Allowance for Credit Losses	1,418,000	8,424,000
Average Recorded Investment	12,965,000
Interest Income Recognized	429,000
With an allowance [Member] | Real estate segment [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	43,545,000	56,339,000
Unpaid Balance of Impaired Loans	48,487,000	67,029,000
Related Allowance for Credit Losses	17,688,000	14,441,000
Average Recorded Investment	54,527,000
Interest Income Recognized	986,000
With an allowance [Member] | Real estate segment [Member] | Commercial [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	20,938,000	20,412,000
Unpaid Balance of Impaired Loans	21,422,000	21,026,000
Related Allowance for Credit Losses	5,324,000	5,227,000
Average Recorded Investment	27,210,000
Interest Income Recognized	851,000
With an allowance [Member] | All other receivables [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,140,000	0
Unpaid Balance of Impaired Loans	1,140,000	0
Related Allowance for Credit Losses	317,000	0
Average Recorded Investment	1,307,000
Interest Income Recognized	$ 8,000