LOANS AND LEASES, Impaired (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	$ 211,112	$ 234,923
Unpaid Balance of Impaired Loans	266,483	287,099
Related Allowance for Credit Losses	25,546	39,708
Average Recorded Investment	224,669	309,604
Interest Income Recognized	1,684	5,049
Commercial and industrial segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	6,106	7,833
Unpaid Balance of Impaired Loans	6,977	10,155
Related Allowance for Credit Losses	1,548	4,071
Average Recorded Investment	7,249	7,437
Interest Income Recognized	74	127
Real estate segment [Member] | Consumer mortgages [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	28,416	31,793
Unpaid Balance of Impaired Loans	33,502	35,762
Related Allowance for Credit Losses	3,977	4,386
Average Recorded Investment	30,647	34,588
Interest Income Recognized	258	720
Real estate segment [Member] | Home equity [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,583	675
Unpaid Balance of Impaired Loans	1,726	1,047
Related Allowance for Credit Losses	178	48
Average Recorded Investment	969	1,045
Interest Income Recognized	2	4
Real estate segment [Member] | Agricultural [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	3,099	3,096
Unpaid Balance of Impaired Loans	4,317	4,223
Related Allowance for Credit Losses	386	380
Average Recorded Investment	3,085	5,666
Interest Income Recognized	17	38
Real estate segment [Member] | Commercial and industrial-owner occupied [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	28,152	24,801
Unpaid Balance of Impaired Loans	33,560	30,276
Related Allowance for Credit Losses	3,051	3,601
Average Recorded Investment	25,772	21,927
Interest Income Recognized	171	331
Real estate segment [Member] | Construction, acquisition and development [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	111,263	128,179
Unpaid Balance of Impaired Loans	142,085	157,208
Related Allowance for Credit Losses	11,736	21,581
Average Recorded Investment	121,294	188,553
Interest Income Recognized	848	2,592
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	1,067
Unpaid Balance of Impaired Loans	0	2,259
Related Allowance for Credit Losses	0	0
Average Recorded Investment	0	6,045
Interest Income Recognized	0	18
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	11,259	13,244
Unpaid Balance of Impaired Loans	14,648	15,396
Related Allowance for Credit Losses	441	1,589
Average Recorded Investment	12,253	14,603
Interest Income Recognized	91	202
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	367	372
Unpaid Balance of Impaired Loans	539	545
Related Allowance for Credit Losses	0	0
Average Recorded Investment	368	762
Interest Income Recognized	7	11
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	3,559	5,020
Unpaid Balance of Impaired Loans	4,927	6,045
Related Allowance for Credit Losses	95	886
Average Recorded Investment	3,917	16,952
Interest Income Recognized	42	209
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	21,815	22,221
Unpaid Balance of Impaired Loans	24,241	27,583
Related Allowance for Credit Losses	1,598	1,418
Average Recorded Investment	23,191	33,605
Interest Income Recognized	148	528
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	74,263	86,255
Unpaid Balance of Impaired Loans	97,730	105,380
Related Allowance for Credit Losses	9,602	17,688
Average Recorded Investment	81,565	116,586
Interest Income Recognized	560	1,624
Real estate segment [Member] | Commercial [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	31,482	36,122
Unpaid Balance of Impaired Loans	42,922	45,620
Related Allowance for Credit Losses	4,410	5,324
Average Recorded Investment	34,538	47,912
Interest Income Recognized	302	1,162
All other receivables [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,011	2,424
Unpaid Balance of Impaired Loans	1,394	2,808
Related Allowance for Credit Losses	260	317
Average Recorded Investment	1,115	2,476
Interest Income Recognized	12	75
With no related allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	120,963	117,217
Unpaid Balance of Impaired Loans	168,738	154,678
Related Allowance for Credit Losses	0	0
Average Recorded Investment	105,722	167,615
Interest Income Recognized	751	2,000
With no related allowance [Member] | Commercial and industrial segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	4,931	4,874
Unpaid Balance of Impaired Loans	5,684	6,854
Related Allowance for Credit Losses	0	0
Average Recorded Investment	3,466	3,879
Interest Income Recognized	38	78
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	14,610	16,883
Unpaid Balance of Impaired Loans	18,635	19,538
Related Allowance for Credit Losses	0	0
Average Recorded Investment	13,178	19,628
Interest Income Recognized	88	397
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	874	627
Unpaid Balance of Impaired Loans	1,017	771
Related Allowance for Credit Losses	0	0
Average Recorded Investment	711	541
Interest Income Recognized	2	1
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	1,718	1,549
Unpaid Balance of Impaired Loans	2,895	2,676
Related Allowance for Credit Losses	0	0
Average Recorded Investment	1,602	2,502
Interest Income Recognized	17	20
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	16,390	6,973
Unpaid Balance of Impaired Loans	21,261	9,191
Related Allowance for Credit Losses	0	0
Average Recorded Investment	9,438	11,598
Interest Income Recognized	98	185
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	64,770	69,843
Unpaid Balance of Impaired Loans	90,905	89,782
Related Allowance for Credit Losses	0	0
Average Recorded Investment	60,417	107,596
Interest Income Recognized	348	941
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	0	1,067
Unpaid Balance of Impaired Loans	0	2,259
Related Allowance for Credit Losses	0	0
Average Recorded Investment	0	5,474
Interest Income Recognized	0	18
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	8,174	7,931
Unpaid Balance of Impaired Loans	11,563	9,313
Related Allowance for Credit Losses	0	0
Average Recorded Investment	6,703	9,269
Interest Income Recognized	56	94
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	367	372
Unpaid Balance of Impaired Loans	539	545
Related Allowance for Credit Losses	0	0
Average Recorded Investment	368	491
Interest Income Recognized	7	9
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	3,241	633
Unpaid Balance of Impaired Loans	4,088	917
Related Allowance for Credit Losses	0	0
Average Recorded Investment	1,522	9,663
Interest Income Recognized	34	83
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	11,927	17,130
Unpaid Balance of Impaired Loans	14,213	19,855
Related Allowance for Credit Losses	0	0
Average Recorded Investment	12,845	20,640
Interest Income Recognized	77	99
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	41,061	42,710
Unpaid Balance of Impaired Loans	60,502	56,893
Related Allowance for Credit Losses	0	0
Average Recorded Investment	38,979	62,059
Interest Income Recognized	174	638
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	16,947	15,184
Unpaid Balance of Impaired Loans	27,306	24,198
Related Allowance for Credit Losses	0	0
Average Recorded Investment	16,122	20,702
Interest Income Recognized	154	311
With no related allowance [Member] | All other receivables [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	723	1,284
Unpaid Balance of Impaired Loans	1,035	1,668
Related Allowance for Credit Losses	0	0
Average Recorded Investment	788	1,169
Interest Income Recognized	6	67
With an allowance [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	90,149	117,706
Unpaid Balance of Impaired Loans	97,745	132,421
Related Allowance for Credit Losses	25,546	39,708
Average Recorded Investment	118,947	141,989
Interest Income Recognized	933	3,049
With an allowance [Member] | Commercial and industrial segment [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,175	2,959
Unpaid Balance of Impaired Loans	1,293	3,301
Related Allowance for Credit Losses	1,548	4,071
Average Recorded Investment	3,783	3,558
Interest Income Recognized	36	49
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	13,806	14,910
Unpaid Balance of Impaired Loans	14,867	16,224
Related Allowance for Credit Losses	3,977	4,386
Average Recorded Investment	17,469	14,960
Interest Income Recognized	170	323
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	709	48
Unpaid Balance of Impaired Loans	709	276
Related Allowance for Credit Losses	178	48
Average Recorded Investment	258	504
Interest Income Recognized	0	3
With an allowance [Member] | Real estate segment [Member] | Agricultural [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	1,381	1,547
Unpaid Balance of Impaired Loans	1,422	1,547
Related Allowance for Credit Losses	386	380
Average Recorded Investment	1,483	3,164
Interest Income Recognized	0	18
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	11,762	17,828
Unpaid Balance of Impaired Loans	12,299	21,085
Related Allowance for Credit Losses	3,051	3,601
Average Recorded Investment	16,334	10,329
Interest Income Recognized	73	146
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	46,493	58,336
Unpaid Balance of Impaired Loans	51,180	67,426
Related Allowance for Credit Losses	11,736	21,581
Average Recorded Investment	60,877	80,957
Interest Income Recognized	500	1,651
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	0
Unpaid Balance of Impaired Loans	0	0
Related Allowance for Credit Losses	0	0
Average Recorded Investment	0	571
Interest Income Recognized	0	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	3,085	5,313
Unpaid Balance of Impaired Loans	3,085	6,083
Related Allowance for Credit Losses	441	1,589
Average Recorded Investment	5,550	5,334
Interest Income Recognized	35	108
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	0
Unpaid Balance of Impaired Loans	0	0
Related Allowance for Credit Losses	0	0
Average Recorded Investment	0	271
Interest Income Recognized	0	2
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	318	4,387
Unpaid Balance of Impaired Loans	839	5,128
Related Allowance for Credit Losses	95	886
Average Recorded Investment	2,395	7,289
Interest Income Recognized	8	126
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	9,888	5,091
Unpaid Balance of Impaired Loans	10,028	7,728
Related Allowance for Credit Losses	1,598	1,418
Average Recorded Investment	10,346	12,965
Interest Income Recognized	71	429
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	33,202	43,545
Unpaid Balance of Impaired Loans	37,228	48,487
Related Allowance for Credit Losses	9,602	17,688
Average Recorded Investment	42,586	54,527
Interest Income Recognized	386	986
With an allowance [Member] | Real estate segment [Member] | Commercial [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	14,535	20,938
Unpaid Balance of Impaired Loans	15,616	21,422
Related Allowance for Credit Losses	4,410	5,324
Average Recorded Investment	18,416	27,210
Interest Income Recognized	148	851
With an allowance [Member] | All other receivables [Member]
Impaired loans and leases, net of unearned income [Abstract]
Recorded Investment in Impaired Loans	288	1,140
Unpaid Balance of Impaired Loans	359	1,140
Related Allowance for Credit Losses	260	317
Average Recorded Investment	327	1,307
Interest Income Recognized	$ 6	$ 8