LOANS AND LEASES, Impaired (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2011	Dec. 31, 2010
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	$ 279,889,000	$ 279,889,000	$ 273,405,000
Unpaid Balance of Impaired Loans	342,838,000	342,838,000	345,377,000
Related Allowance for Credit Losses	38,657,000	38,657,000	40,719,000
Average Recorded Investment	288,856,000	327,351,000
Interest Income Recognized	1,708,000	4,511,000
Impaired loans [Abstract]
Impaired loans that were characterized as troubled debt restructurings	59,000,000	59,000,000	63,700,000
Commercial and industrial segment [Member] | With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	3,621,000	3,621,000	1,457,000
Unpaid Balance of Impaired Loans	5,155,000	5,155,000	2,600,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	3,778,000	4,040,000
Interest Income Recognized	38,000	74,000
All other receivables [Member] | With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	776,000	776,000	702,000
Unpaid Balance of Impaired Loans	1,089,000	1,089,000	931,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	768,000	1,246,000
Interest Income Recognized	6,000	65,000
Consumer mortgages [Member] | Real estate segment [Member] | With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	16,160,000	16,160,000	11,228,000
Unpaid Balance of Impaired Loans	18,768,000	18,768,000	14,273,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	16,116,000	20,937,000
Interest Income Recognized	98,000	357,000
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	630,000	630,000	290,000
Unpaid Balance of Impaired Loans	773,000	773,000	629,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	571,000	512,000
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	2,788,000	2,788,000	1,439,000
Unpaid Balance of Impaired Loans	4,290,000	4,290,000	1,981,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	2,502,000	2,869,000
Interest Income Recognized	0	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	16,314,000	16,314,000	10,920,000
Unpaid Balance of Impaired Loans	22,165,000	22,165,000	12,371,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	13,583,000	11,145,000
Interest Income Recognized	59,000	169,000
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	102,324,000	102,324,000	80,204,000
Unpaid Balance of Impaired Loans	138,053,000	138,053,000	120,938,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	107,175,000	115,296,000
Interest Income Recognized	394,000	855,000
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	0	0	8,293,000
Unpaid Balance of Impaired Loans	0	0	9,975,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	3,101,000	7,197,000
Interest Income Recognized	18,000	18,000
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	10,861,000	10,861,000	6,511,000
Unpaid Balance of Impaired Loans	12,864,000	12,864,000	11,749,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	11,611,000	8,998,000
Interest Income Recognized	47,000	80,000
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	712,000	712,000	392,000
Unpaid Balance of Impaired Loans	1,169,000	1,169,000	580,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	752,000	513,000
Interest Income Recognized	3,000	7,000
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	1,925,000	1,925,000	11,171,000
Unpaid Balance of Impaired Loans	3,621,000	3,621,000	13,062,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	6,223,000	12,418,000
Interest Income Recognized	27,000	82,000
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	26,276,000	26,276,000	7,897,000
Unpaid Balance of Impaired Loans	35,395,000	35,395,000	12,501,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	21,732,000	20,683,000
Interest Income Recognized	35,000	84,000
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	62,550,000	62,550,000	45,940,000
Unpaid Balance of Impaired Loans	85,004,000	85,004,000	73,071,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	63,756,000	65,487,000
Interest Income Recognized	264,000	584,000
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	23,696,000	23,696,000	15,795,000
Unpaid Balance of Impaired Loans	30,688,000	30,688,000	20,478,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	18,852,000	21,533,000
Interest Income Recognized	121,000	281,000
With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	166,309,000	166,309,000	122,035,000
Unpaid Balance of Impaired Loans	220,981,000	220,981,000	174,201,000
Related Allowance for Credit Losses	0	0	0
Average Recorded Investment	163,345,000	177,578,000
Interest Income Recognized	716,000	1,819,000
Commercial and industrial segment [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	2,380,000	2,380,000	679,000
Unpaid Balance of Impaired Loans	2,447,000	2,447,000	977,000
Related Allowance for Credit Losses	757,000	757,000	125,000
Average Recorded Investment	1,812,000	3,374,000
Interest Income Recognized	20,000	25,000
All other receivables [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	450,000	450,000	0
Unpaid Balance of Impaired Loans	450,000	450,000	0
Related Allowance for Credit Losses	100,000	100,000	0
Average Recorded Investment	1,038,000	1,476,000
Interest Income Recognized	3,000	8,000
Consumer mortgages [Member] | Real estate segment [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	14,547,000	14,547,000	16,995,000
Unpaid Balance of Impaired Loans	15,434,000	15,434,000	16,644,000
Related Allowance for Credit Losses	4,050,000	4,050,000	4,226,000
Average Recorded Investment	10,091,000	15,025,000
Interest Income Recognized	33,000	282,000
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	896,000	896,000	561,000
Unpaid Balance of Impaired Loans	896,000	896,000	561,000
Related Allowance for Credit Losses	228,000	228,000	41,000
Average Recorded Investment	665,000	469,000
Interest Income Recognized	2,000	3,000
Agricultural [Member] | Real estate segment [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,429,000	1,429,000	2,856,000
Unpaid Balance of Impaired Loans	1,449,000	1,449,000	3,132,000
Related Allowance for Credit Losses	463,000	463,000	544,000
Average Recorded Investment	3,674,000	3,732,000
Interest Income Recognized	0	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	6,065,000	6,065,000	5,153,000
Unpaid Balance of Impaired Loans	7,203,000	7,203,000	5,298,000
Related Allowance for Credit Losses	1,755,000	1,755,000	1,361,000
Average Recorded Investment	7,724,000	10,407,000
Interest Income Recognized	51,000	109,000
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	65,677,000	65,677,000	104,714,000
Unpaid Balance of Impaired Loans	69,151,000	69,151,000	123,538,000
Related Allowance for Credit Losses	24,911,000	24,911,000	29,195,000
Average Recorded Investment	73,955,000	86,241,000
Interest Income Recognized	529,000	1,494,000
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 Balance of Impaired Loans	0	0	6,978,000
Related Allowance for Credit Losses	0	0	4,000
Average Recorded Investment	0	764,000
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	5,952,000	5,952,000	11,939,000
Unpaid Balance of Impaired Loans	6,417,000	6,417,000	14,846,000
Related Allowance for Credit Losses	1,733,000	1,733,000	932,000
Average Recorded Investment	6,356,000	5,423,000
Interest Income Recognized	54,000	98,000
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 Balance of Impaired Loans	0	0	498,000
Related Allowance for Credit Losses	0	0	148,000
Average Recorded Investment	0	306,000
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	5,796,000	5,796,000	12,459,000
Unpaid Balance of Impaired Loans	6,036,000	6,036,000	12,612,000
Related Allowance for Credit Losses	1,426,000	1,426,000	5,246,000
Average Recorded Investment	7,147,000	7,862,000
Interest Income Recognized	19,000	89,000
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	5,587,000	5,587,000	21,575,000
Unpaid Balance of Impaired Loans	5,837,000	5,837,000	21,575,000
Related Allowance for Credit Losses	1,711,000	1,711,000	8,424,000
Average Recorded Investment	13,035,000	15,045,000
Interest Income Recognized	89,000	420,000
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	48,342,000	48,342,000	56,339,000
Unpaid Balance of Impaired Loans	50,861,000	50,861,000	67,029,000
Related Allowance for Credit Losses	20,041,000	20,041,000	14,441,000
Average Recorded Investment	47,417,000	56,841,000
Interest Income Recognized	367,000	885,000
Commercial [Member] | Real estate segment [Member] | With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	22,136,000	22,136,000	20,412,000
Unpaid Balance of Impaired Loans	24,827,000	24,827,000	21,026,000
Related Allowance for Credit Losses	6,393,000	6,393,000	5,227,000
Average Recorded Investment	26,552,000	29,049,000
Interest Income Recognized	354,000	753,000
With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	113,580,000	113,580,000	151,370,000
Unpaid Balance of Impaired Loans	121,857,000	121,857,000	171,176,000
Related Allowance for Credit Losses	38,657,000	38,657,000	40,719,000
Average Recorded Investment	125,511,000	149,773,000
Interest Income Recognized	992,000	2,692,000
Commercial and industrial segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	6,001,000	6,001,000	2,136,000
Unpaid Balance of Impaired Loans	7,602,000	7,602,000	3,577,000
Related Allowance for Credit Losses	757,000	757,000	125,000
Average Recorded Investment	5,590,000	7,414,000
Interest Income Recognized	58,000	99,000
Consumer mortgages [Member] | Real estate segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	30,707,000	30,707,000	28,223,000
Unpaid Balance of Impaired Loans	34,202,000	34,202,000	30,917,000
Related Allowance for Credit Losses	4,050,000	4,050,000	4,226,000
Average Recorded Investment	26,207,000	35,962,000
Interest Income Recognized	131,000	639,000
Home equity [Member] | Real estate segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,526,000	1,526,000	851,000
Unpaid Balance of Impaired Loans	1,669,000	1,669,000	1,190,000
Related Allowance for Credit Losses	228,000	228,000	41,000
Average Recorded Investment	1,236,000	981,000
Interest Income Recognized	2,000	3,000
Agricultural [Member] | Real estate segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	4,217,000	4,217,000	4,295,000
Unpaid Balance of Impaired Loans	5,739,000	5,739,000	5,113,000
Related Allowance for Credit Losses	463,000	463,000	544,000
Average Recorded Investment	6,176,000	6,601,000
Interest Income Recognized	0	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	22,379,000	22,379,000	16,073,000
Unpaid Balance of Impaired Loans	29,368,000	29,368,000	17,669,000
Related Allowance for Credit Losses	1,755,000	1,755,000	1,361,000
Average Recorded Investment	21,307,000	21,552,000
Interest Income Recognized	110,000	278,000
Construction, acquisition and development [Member] | Real estate segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	168,001,000	168,001,000	184,918,000
Unpaid Balance of Impaired Loans	207,204,000	207,204,000	244,476,000
Related Allowance for Credit Losses	24,911,000	24,911,000	29,195,000
Average Recorded Investment	181,130,000	201,537,000
Interest Income Recognized	923,000	2,349,000
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	0	0	10,197,000
Unpaid Balance of Impaired Loans	0	0	16,953,000
Related Allowance for Credit Losses	0	0	4,000
Average Recorded Investment	3,101,000	7,961,000
Interest Income Recognized	18,000	18,000
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	16,813,000	16,813,000	18,450,000
Unpaid Balance of Impaired Loans	19,281,000	19,281,000	26,595,000
Related Allowance for Credit Losses	1,733,000	1,733,000	932,000
Average Recorded Investment	17,967,000	14,421,000
Interest Income Recognized	101,000	178,000
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	712,000	712,000	890,000
Unpaid Balance of Impaired Loans	1,169,000	1,169,000	1,078,000
Related Allowance for Credit Losses	0	0	148,000
Average Recorded Investment	752,000	819,000
Interest Income Recognized	3,000	9,000
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	7,721,000	7,721,000	23,630,000
Unpaid Balance of Impaired Loans	9,657,000	9,657,000	25,674,000
Related Allowance for Credit Losses	1,426,000	1,426,000	5,246,000
Average Recorded Investment	13,370,000	20,280,000
Interest Income Recognized	46,000	171,000
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	31,863,000	31,863,000	29,472,000
Unpaid Balance of Impaired Loans	41,232,000	41,232,000	34,076,000
Related Allowance for Credit Losses	1,711,000	1,711,000	8,424,000
Average Recorded Investment	34,767,000	35,728,000
Interest Income Recognized	124,000	504,000
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	110,892,000	110,892,000	102,279,000
Unpaid Balance of Impaired Loans	135,865,000	135,865,000	140,100,000
Related Allowance for Credit Losses	20,041,000	20,041,000	14,441,000
Average Recorded Investment	111,173,000	122,328,000
Interest Income Recognized	631,000	1,469,000
Commercial [Member] | Real estate segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	45,832,000	45,832,000	36,207,000
Unpaid Balance of Impaired Loans	55,515,000	55,515,000	41,504,000
Related Allowance for Credit Losses	6,393,000	6,393,000	5,227,000
Average Recorded Investment	45,404,000	50,582,000
Interest Income Recognized	475,000	1,034,000
All other receivables [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,226,000	1,226,000	702,000
Unpaid Balance of Impaired Loans	1,539,000	1,539,000	931,000
Related Allowance for Credit Losses	100,000	100,000	0
Average Recorded Investment	1,806,000	2,722,000
Interest Income Recognized	$ 9,000	$ 73,000