ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Recorded Investment In Non Accrual And Loans Past Due Over 90 Days Still On Accrual By Class Of Loans) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	$ 33,459	$ 39,452
Loans Past Due Over 90 Days and Still Accruing	109	52
Other Commerical Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	0	0
Loans Past Due Over 90 Days and Still Accruing	0	0
Other Consumer Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	54	7
Loans Past Due Over 90 Days and Still Accruing	0	0
Non-working Capital Loans [Member] | Commercial and Industrial Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	5,349	5,433
Loans Past Due Over 90 Days and Still Accruing	0	0
Owner Occupied Loans [Member] | Commercial Real Estate and Multi-Family Residential Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	2,876	4,371
Loans Past Due Over 90 Days and Still Accruing	0	0
Closed End First Mortgage Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	459	1,193
Loans Past Due Over 90 Days and Still Accruing	107	52
Open End and Junior Lien Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	424	452
Loans Past Due Over 90 Days and Still Accruing	2	0
Working Capital Lines Of Credit Loans [Member] | Commercial and Industrial Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	2,012	4,743
Loans Past Due Over 90 Days and Still Accruing	0	0
Construction and Land Development Loans [Member] | Commercial Real Estate and Multi-Family Residential Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	1,890	429
Loans Past Due Over 90 Days and Still Accruing	0	0
Nonowner Occupied Loans [Member] | Commercial Real Estate and Multi-Family Residential Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	19,575	21,971
Loans Past Due Over 90 Days and Still Accruing	0	0
Multifamily Loans [Member] | Commercial Real Estate and Multi-Family Residential Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	0	0
Loans Past Due Over 90 Days and Still Accruing	0	0
Loans Secured By Farmland [Member] | Agri-business and Agricultural Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	820	628
Loans Past Due Over 90 Days and Still Accruing	0	0
Loans For Agricultural Production [Member] | Agri-business and Agricultural Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	0	225
Loans Past Due Over 90 Days and Still Accruing	0	0
Residential Construction and Land Development Loans [Member] | Consumer 1-4 Family Mortgage Loans [Member]
Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days Still on Accrual by Class of Loans [Abstract]
Nonaccrual	0	0
Loans Past Due Over 90 Days and Still Accruing	$ 0	$ 0