LOAN AND LEASES (2) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	$ 8,679,969	$ 8,870,311
Pass [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	7,785,548	7,845,589
Special Mention [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	180,285	124,694
Substandard [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	529,484	655,085
Doubtful [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	7,953	8,850
Loss [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	560	1,170
Impaired [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	176,139	234,923
Commercial and industrial segment [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	1,462,719	1,473,728
Commercial and industrial segment [Member] | Pass [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	1,403,197	1,415,731
Commercial and industrial segment [Member] | Special Mention [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	10,018	4,947
Commercial and industrial segment [Member] | Substandard [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	42,401	43,549
Commercial and industrial segment [Member] | Doubtful [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	867	1,263
Commercial and industrial segment [Member] | Loss [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	17	405
Commercial and industrial segment [Member] | Impaired [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	6,219	7,833
Real estate [Member] | Consumer mortgages [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	1,888,783	1,945,190
Real estate [Member] | Home equity [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	492,833	514,362
Real estate [Member] | Agricultural [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	257,733	239,487
Real estate [Member] | Commercial and industrial-owner occupied [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	1,309,631	1,301,575
Real estate [Member] | Construction, acquisition and development [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	823,692	908,362
Real estate [Member] | Commercial Real Estate [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	1,738,516	1,754,022
Real estate [Member] | Pass [Member] | Consumer mortgages [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	1,703,860	1,742,593
Real estate [Member] | Pass [Member] | Home equity [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	467,218	492,235
Real estate [Member] | Pass [Member] | Agricultural [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	232,740	213,280
Real estate [Member] | Pass [Member] | Commercial and industrial-owner occupied [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	1,169,863	1,167,220
Real estate [Member] | Pass [Member] | Construction, acquisition and development [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	607,782	619,497
Real estate [Member] | Pass [Member] | Commercial Real Estate [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	1,517,131	1,501,196
Real estate [Member] | Special Mention [Member] | Consumer mortgages [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	31,993	17,914
Real estate [Member] | Special Mention [Member] | Home equity [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	4,788	2,775
Real estate [Member] | Special Mention [Member] | Agricultural [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	4,684	3,795
Real estate [Member] | Special Mention [Member] | Commercial and industrial-owner occupied [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	34,384	18,280
Real estate [Member] | Special Mention [Member] | Construction, acquisition and development [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	42,128	23,429
Real estate [Member] | Special Mention [Member] | Commercial Real Estate [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	45,500	37,409
Real estate [Member] | Substandard [Member] | Consumer mortgages [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	133,146	148,267
Real estate [Member] | Substandard [Member] | Home equity [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	17,902	17,050
Real estate [Member] | Substandard [Member] | Agricultural [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	14,727	19,296
Real estate [Member] | Substandard [Member] | Commercial and industrial-owner occupied [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	83,610	90,778
Real estate [Member] | Substandard [Member] | Construction, acquisition and development [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	85,326	136,412
Real estate [Member] | Substandard [Member] | Commercial Real Estate [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	138,613	179,295
Real estate [Member] | Doubtful [Member] | Consumer mortgages [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	3,727	4,434
Real estate [Member] | Doubtful [Member] | Home equity [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	1,002	1,134
Real estate [Member] | Doubtful [Member] | Agricultural [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	20	20
Real estate [Member] | Doubtful [Member] | Commercial and industrial-owner occupied [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	736	496
Real estate [Member] | Doubtful [Member] | Construction, acquisition and development [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	703	845
Real estate [Member] | Doubtful [Member] | Commercial Real Estate [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	70	0
Real estate [Member] | Loss [Member] | Consumer mortgages [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	203	189
Real estate [Member] | Loss [Member] | Home equity [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	285	493
Real estate [Member] | Loss [Member] | Agricultural [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	0	0
Real estate [Member] | Loss [Member] | Commercial and industrial-owner occupied [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	49	0
Real estate [Member] | Loss [Member] | Construction, acquisition and development [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	0	0
Real estate [Member] | Loss [Member] | Commercial Real Estate [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	0	0
Real estate [Member] | Impaired [Member] | Consumer mortgages [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	15,854	31,793
Real estate [Member] | Impaired [Member] | Home equity [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	1,638	675
Real estate [Member] | Impaired [Member] | Agricultural [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	5,562	3,096
Real estate [Member] | Impaired [Member] | Commercial and industrial-owner occupied [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	20,989	24,801
Real estate [Member] | Impaired [Member] | Construction, acquisition and development [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	87,753	128,179
Real estate [Member] | Impaired [Member] | Commercial Real Estate [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	37,202	36,122
Credit cards segment [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	101,405	106,281
Credit cards segment [Member] | Pass [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	101,405	105,867
Credit cards segment [Member] | Special Mention [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	0	41
Credit cards segment [Member] | Substandard [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	0	175
Credit cards segment [Member] | Doubtful [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	0	188
Credit cards segment [Member] | Loss [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	0	10
Credit cards segment [Member] | Impaired [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	0	0
All other receivables [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	604,657	627,304
All other receivables [Member] | Pass [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	582,352	587,970
All other receivables [Member] | Special Mention [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	6,790	16,104
All other receivables [Member] | Substandard [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	13,759	20,263
All other receivables [Member] | Doubtful [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	828	470
All other receivables [Member] | Loss [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	6	73
All other receivables [Member] | Impaired [Member]
Loan and lease portfolio, net of unearned income, by grade [Abstract]
Total	$ 922	$ 2,424