LOANS AND LEASES, Impaired (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Dec. 31, 2010
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	$ 303,657,000	$ 303,657,000	$ 273,405,000
Unpaid Principal Balance of Impaired Loans	374,760,000	374,760,000	345,377,000
Related Allowance for Credit Losses	46,810,000	46,810,000	40,719,000
Average Recorded Investment	394,439,000	356,003,000
Interest Income Recognized	1,767,000	2,803,000
Impaired loans [Abstract]
Impaired loans, net of valuation allowance	46,800,000	46,800,000	40,700,000
Impaired loans characterized as troubled debt restructurings	75,800,000	75,800,000	63,700,000
Commercial and industrial segment [Member] | Commercial and industrial-owner occupied [Member] | With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	4,395,000	4,395,000	1,457,000
Unpaid Principal Balance of Impaired Loans	6,269,000	6,269,000	2,600,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	5,589,000	4,258,000
Interest Income Recognized	31,000	36,000
All other receivables [Member] | With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	819,000	819,000	702,000
Unpaid Principal Balance of Impaired Loans	5,297,000	5,297,000	931,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	2,283,000	1,535,000
Interest Income Recognized	51,000	59,000
Consumer mortgage [Member] | Real estate segment [Member] | With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	15,758,000	15,758,000	11,228,000
Unpaid Principal Balance of Impaired Loans	19,023,000	19,023,000	14,273,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	27,727,000	23,897,000
Interest Income Recognized	195,000	259,000
Home equity [Member] | Real estate segment [Member] | With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	456,000	456,000	290,000
Unpaid Principal Balance of Impaired Loans	561,000	561,000	629,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	632,000	489,000
Interest Income Recognized	0	0
Agricultural [Member] | Real estate segment [Member] | With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	2,101,000	2,101,000	1,439,000
Unpaid Principal Balance of Impaired Loans	2,177,000	2,177,000	1,981,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	3,808,000	3,120,000
Interest Income Recognized	18,000	18,000
Commercial and industrial-owner occupied [Member] | Real estate segment [Member] | With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	12,060,000	12,060,000	10,920,000
Unpaid Principal Balance of Impaired Loans	16,955,000	16,955,000	12,371,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	12,727,000	10,162,000
Interest Income Recognized	53,000	110,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	118,763,000	118,763,000	80,204,000
Unpaid Principal Balance of Impaired Loans	160,553,000	160,553,000	120,938,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	156,510,000	122,221,000
Interest Income Recognized	391,000	461,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With no related allowance [Member] | Multi-family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	9,174,000	9,174,000	8,293,000
Unpaid Principal Balance of Impaired Loans	11,756,000	11,756,000	9,975,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	10,205,000	9,466,000
Interest Income Recognized	0	0
Construction, acquisition and development [Member] | Real estate segment [Member] | With no related allowance [Member] | One-to-four family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	14,297,000	14,297,000	6,511,000
Unpaid Principal Balance of Impaired Loans	17,753,000	17,753,000	11,749,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	11,172,000	7,861,000
Interest Income Recognized	28,000	33,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With no related allowance [Member] | Recreation and all other loans collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	774,000	774,000	392,000
Unpaid Principal Balance of Impaired Loans	1,230,000	1,230,000	580,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	660,000	403,000
Interest Income Recognized	3,000	4,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With no related allowance [Member] | Commercial construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	8,157,000	8,157,000	11,171,000
Unpaid Principal Balance of Impaired Loans	12,097,000	12,097,000	13,062,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	20,194,000	15,974,000
Interest Income Recognized	53,000	55,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With no related allowance [Member] | Commercial acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	19,232,000	19,232,000	7,897,000
Unpaid Principal Balance of Impaired Loans	25,254,000	25,254,000	12,501,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	24,619,000	20,560,000
Interest Income Recognized	49,000	49,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With no related allowance [Member] | Residential acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	67,129,000	67,129,000	45,940,000
Unpaid Principal Balance of Impaired Loans	92,463,000	92,463,000	73,071,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	89,660,000	67,957,000
Interest Income Recognized	258,000	320,000
Commercial [Member] | Real estate segment [Member] | With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	10,681,000	10,681,000	15,795,000
Unpaid Principal Balance of Impaired Loans	14,502,000	14,502,000	20,478,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	23,220,000	23,506,000
Interest Income Recognized	112,000	160,000
With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	165,033,000	165,033,000	122,035,000
Unpaid Principal Balance of Impaired Loans	225,337,000	225,337,000	174,201,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	232,496,000	189,188,000
Interest Income Recognized	851,000	1,103,000
Commercial and industrial segment [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,590,000	1,590,000	679,000
Unpaid Principal Balance of Impaired Loans	1,688,000	1,688,000	977,000
Related Allowance for Credit Losses	456,000	456,000	125,000
Average Recorded Investment	3,794,000	4,342,000
Interest Income Recognized	5,000	5,000
All other receivables [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,050,000	1,050,000	0
Unpaid Principal Balance of Impaired Loans	1,050,000	1,050,000	0
Related Allowance for Credit Losses	794,000	794,000	0
Average Recorded Investment	3,396,000	1,706,000
Interest Income Recognized	4,000	5,000
Consumer mortgage [Member] | Real estate segment [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	7,985,000	7,985,000	16,995,000
Unpaid Principal Balance of Impaired Loans	8,089,000	8,089,000	16,644,000
Related Allowance for Credit Losses	2,278,000	2,278,000	4,226,000
Average Recorded Investment	16,603,000	17,987,000
Interest Income Recognized	102,000	249,000
Home equity [Member] | Real estate segment [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	214,000	214,000	561,000
Unpaid Principal Balance of Impaired Loans	214,000	214,000	561,000
Related Allowance for Credit Losses	39,000	39,000	41,000
Average Recorded Investment	144,000	385,000
Interest Income Recognized	1,000	1,000
Agricultural [Member] | Real estate segment [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	5,215,000	5,215,000	2,856,000
Unpaid Principal Balance of Impaired Loans	5,690,000	5,690,000	3,132,000
Related Allowance for Credit Losses	1,729,000	1,729,000	544,000
Average Recorded Investment	4,202,000	3,887,000
Interest Income Recognized	4,000	18,000
Commercial and industrial-owner occupied [Member] | Real estate segment [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	9,130,000	9,130,000	5,153,000
Unpaid Principal Balance of Impaired Loans	9,450,000	9,450,000	5,298,000
Related Allowance for Credit Losses	3,151,000	3,151,000	1,361,000
Average Recorded Investment	12,191,000	12,150,000
Interest Income Recognized	45,000	58,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	78,268,000	78,268,000	104,714,000
Unpaid Principal Balance of Impaired Loans	85,856,000	85,856,000	123,538,000
Related Allowance for Credit Losses	27,721,000	27,721,000	29,195,000
Average Recorded Investment	87,236,000	95,224,000
Interest Income Recognized	572,000	965,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With an allowance [Member] | Multi-family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	0	0	1,904,000
Unpaid Principal Balance of Impaired Loans	0	0	6,978,000
Related Allowance for Credit Losses	0	0	4,000
Average Recorded Investment	981,000	1,184,000
Interest Income Recognized	0	0
Construction, acquisition and development [Member] | Real estate segment [Member] | With an allowance [Member] | One-to-four family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	8,871,000	8,871,000	11,939,000
Unpaid Principal Balance of Impaired Loans	8,977,000	8,977,000	14,846,000
Related Allowance for Credit Losses	2,535,000	2,535,000	932,000
Average Recorded Investment	5,113,000	5,120,000
Interest Income Recognized	44,000	44,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With an allowance [Member] | Recreation and all other loans collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	0	0	498,000
Unpaid Principal Balance of Impaired Loans	0	0	498,000
Related Allowance for Credit Losses	0	0	148,000
Average Recorded Investment	291,000	474,000
Interest Income Recognized	0	2,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With an allowance [Member] | Commercial construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	8,460,000	8,460,000	12,459,000
Unpaid Principal Balance of Impaired Loans	12,532,000	12,532,000	12,612,000
Related Allowance for Credit Losses	2,264,000	2,264,000	5,246,000
Average Recorded Investment	7,210,000	8,452,000
Interest Income Recognized	25,000	70,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With an allowance [Member] | Commercial acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	17,203,000	17,203,000	21,575,000
Unpaid Principal Balance of Impaired Loans	17,695,000	17,695,000	21,575,000
Related Allowance for Credit Losses	6,083,000	6,083,000	8,424,000
Average Recorded Investment	16,463,000	16,505,000
Interest Income Recognized	175,000	331,000
Construction, acquisition and development [Member] | Real estate segment [Member] | With an allowance [Member] | Residential acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	43,734,000	43,734,000	56,339,000
Unpaid Principal Balance of Impaired Loans	46,652,000	46,652,000	67,029,000
Related Allowance for Credit Losses	16,839,000	16,839,000	14,441,000
Average Recorded Investment	57,178,000	63,489,000
Interest Income Recognized	328,000	518,000
Commercial [Member] | Real estate segment [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	35,172,000	35,172,000	20,412,000
Unpaid Principal Balance of Impaired Loans	37,386,000	37,386,000	21,026,000
Related Allowance for Credit Losses	10,642,000	10,642,000	5,227,000
Average Recorded Investment	34,377,000	31,134,000
Interest Income Recognized	183,000	399,000
With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	138,624,000	138,624,000	151,370,000
Unpaid Principal Balance of Impaired Loans	149,423,000	149,423,000	171,176,000
Related Allowance for Credit Losses	46,810,000	46,810,000	40,719,000
Average Recorded Investment	161,943,000	166,815,000
Interest Income Recognized	916,000	1,700,000
Commercial and industrial segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	5,985,000	5,985,000	2,136,000
Unpaid Principal Balance of Impaired Loans	7,957,000	7,957,000	3,577,000
Related Allowance for Credit Losses	456,000	456,000	125,000
Average Recorded Investment	9,383,000	8,600,000
Interest Income Recognized	36,000	41,000
Consumer mortgage [Member] | Real estate segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	23,743,000	23,743,000	28,223,000
Unpaid Principal Balance of Impaired Loans	27,112,000	27,112,000	30,917,000
Related Allowance for Credit Losses	2,278,000	2,278,000	4,226,000
Average Recorded Investment	44,330,000	41,884,000
Interest Income Recognized	297,000	508,000
Home equity [Member] | Real estate segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	670,000	670,000	851,000
Unpaid Principal Balance of Impaired Loans	775,000	775,000	1,190,000
Related Allowance for Credit Losses	39,000	39,000	41,000
Average Recorded Investment	776,000	874,000
Interest Income Recognized	1,000	1,000
Agricultural [Member] | Real estate segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	7,316,000	7,316,000	4,295,000
Unpaid Principal Balance of Impaired Loans	7,867,000	7,867,000	5,113,000
Related Allowance for Credit Losses	1,729,000	1,729,000	544,000
Average Recorded Investment	8,010,000	7,007,000
Interest Income Recognized	22,000	36,000
Commercial and industrial-owner occupied [Member] | Real estate segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	21,190,000	21,190,000	16,073,000
Unpaid Principal Balance of Impaired Loans	26,405,000	26,405,000	17,669,000
Related Allowance for Credit Losses	3,151,000	3,151,000	1,361,000
Average Recorded Investment	24,918,000	22,312,000
Interest Income Recognized	98,000	168,000
Construction, acquisition and development [Member] | Real estate segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	197,031,000	197,031,000	184,918,000
Unpaid Principal Balance of Impaired Loans	246,409,000	246,409,000	244,476,000
Related Allowance for Credit Losses	27,721,000	27,721,000	29,195,000
Average Recorded Investment	243,746,000	217,445,000
Interest Income Recognized	963,000	1,426,000
Construction, acquisition and development [Member] | Real estate segment [Member] | Multi-family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	9,174,000	9,174,000	10,197,000
Unpaid Principal Balance of Impaired Loans	11,756,000	11,756,000	16,953,000
Related Allowance for Credit Losses	0	0	4,000
Average Recorded Investment	11,186,000	10,650,000
Interest Income Recognized	0	0
Construction, acquisition and development [Member] | Real estate segment [Member] | One-to-four family construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	23,168,000	23,168,000	18,450,000
Unpaid Principal Balance of Impaired Loans	26,730,000	26,730,000	26,595,000
Related Allowance for Credit Losses	2,535,000	2,535,000	932,000
Average Recorded Investment	16,285,000	12,981,000
Interest Income Recognized	72,000	77,000
Construction, acquisition and development [Member] | Real estate segment [Member] | Recreation and all other loans collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	774,000	774,000	890,000
Unpaid Principal Balance of Impaired Loans	1,230,000	1,230,000	1,078,000
Related Allowance for Credit Losses	0	0	148,000
Average Recorded Investment	951,000	877,000
Interest Income Recognized	3,000	6,000
Construction, acquisition and development [Member] | Real estate segment [Member] | Commercial construction collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	16,617,000	16,617,000	23,630,000
Unpaid Principal Balance of Impaired Loans	24,629,000	24,629,000	25,674,000
Related Allowance for Credit Losses	2,264,000	2,264,000	5,246,000
Average Recorded Investment	27,404,000	24,426,000
Interest Income Recognized	78,000	125,000
Construction, acquisition and development [Member] | Real estate segment [Member] | Commercial acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	36,435,000	36,435,000	29,472,000
Unpaid Principal Balance of Impaired Loans	42,949,000	42,949,000	34,076,000
Related Allowance for Credit Losses	6,083,000	6,083,000	8,424,000
Average Recorded Investment	41,082,000	37,065,000
Interest Income Recognized	224,000	380,000
Construction, acquisition and development [Member] | Real estate segment [Member] | Residential acquisition and development collateral [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	110,863,000	110,863,000	102,279,000
Unpaid Principal Balance of Impaired Loans	139,115,000	139,115,000	140,100,000
Related Allowance for Credit Losses	16,839,000	16,839,000	14,441,000
Average Recorded Investment	146,838,000	131,446,000
Interest Income Recognized	586,000	838,000
Commercial [Member] | Real estate segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	45,853,000	45,853,000	36,207,000
Unpaid Principal Balance of Impaired Loans	51,888,000	51,888,000	41,504,000
Related Allowance for Credit Losses	10,642,000	10,642,000	5,227,000
Average Recorded Investment	57,597,000	54,640,000
Interest Income Recognized	295,000	559,000
All other receivables [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,869,000	1,869,000	702,000
Unpaid Principal Balance of Impaired Loans	6,347,000	6,347,000	931,000
Related Allowance for Credit Losses	794,000	794,000	0
Average Recorded Investment	5,679,000	3,241,000
Interest Income Recognized	$ 55,000	$ 64,000