LOAN AND LEASES (4) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Non-performing loans and leases [Abstract]
Non-accrual loans and leases	$ 240,246	$ 276,798	$ 331,076
Loans and leases 90 days or more past due, still accruing	1,632	3,434	3,980
Restructured loans and leases still accruing	25,071	42,018	44,786
Total non-performing loans and leases	266,949	322,250	379,842
Days past due of principal or interest at which loans and leases may be placed in non-accrual status (in days)	90 days
Nonaccrual loans and leases [Abstract]
Non-accrual loans and leases	240,246	276,798	331,076
Commercial and industrial segment [Member]
Non-performing loans and leases [Abstract]
Non-accrual loans and leases	13,156	12,260	9,337
Loans and leases 90 days or more past due, still accruing	0	12
Nonaccrual loans and leases [Abstract]
Non-accrual loans and leases	13,156	12,260	9,337
Real estate segment [Member] | Consumer mortgages [Member]
Non-performing loans and leases [Abstract]
Non-accrual loans and leases	35,660	47,878	34,174
Loans and leases 90 days or more past due, still accruing	1,141	2,974
Nonaccrual loans and leases [Abstract]
Non-accrual loans and leases	35,660	47,878	34,174
Real estate segment [Member] | Home equity [Member]
Non-performing loans and leases [Abstract]
Non-accrual loans and leases	2,995	2,036	1,232
Loans and leases 90 days or more past due, still accruing	0	0
Nonaccrual loans and leases [Abstract]
Non-accrual loans and leases	2,995	2,036	1,232
Real estate segment [Member] | Agricultural [Member]
Non-performing loans and leases [Abstract]
Non-accrual loans and leases	8,390	4,179	8,526
Loans and leases 90 days or more past due, still accruing	0	0
Nonaccrual loans and leases [Abstract]
Non-accrual loans and leases	8,390	4,179	8,526
Real estate segment [Member] | Commercial and industrial-owner occupied [Member]
Non-performing loans and leases [Abstract]
Non-accrual loans and leases	26,957	33,112	26,387
Loans and leases 90 days or more past due, still accruing	0	0
Nonaccrual loans and leases [Abstract]
Non-accrual loans and leases	26,957	33,112	26,387
Real estate segment [Member] | Construction, acquisition and development [Member]
Non-performing loans and leases [Abstract]
Non-accrual loans and leases	104,283	133,110	200,434
Loans and leases 90 days or more past due, still accruing	0	0
Nonaccrual loans and leases [Abstract]
Non-accrual loans and leases	104,283	133,110	200,434
Real estate segment [Member] | Commercial Real Estate [Member]
Non-performing loans and leases [Abstract]
Non-accrual loans and leases	44,359	40,616	48,571
Loans and leases 90 days or more past due, still accruing	0	0
Nonaccrual loans and leases [Abstract]
Non-accrual loans and leases	44,359	40,616	48,571
Credit cards segment [Member]
Non-performing loans and leases [Abstract]
Non-accrual loans and leases	364	594	546
Loans and leases 90 days or more past due, still accruing	324	299
Nonaccrual loans and leases [Abstract]
Non-accrual loans and leases	364	594	546
All other receivables [Member]
Non-performing loans and leases [Abstract]
Non-accrual loans and leases	4,082	3,013	1,869
Loans and leases 90 days or more past due, still accruing	167	149
Nonaccrual loans and leases [Abstract]
Non-accrual loans and leases	$ 4,082	$ 3,013	$ 1,869