LOANS (excluding covered loans) - Nonaccrual, Restructured and Impaired Loans (Detail) (Non Covered Loans, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	$ 63,093		$ 63,093		$ 54,299
Restructured Loans, Accrual Status	9,909		9,909		4,009
Restructured loans - nonaccrual status	10,185		10,185		18,071
Total restructured loans	20,094		20,094		22,080
Total impaired loans	83,187		83,187		76,379
Interest income effect
Gross amount of interest that would have been recorded under original terms	1,259	1,304	2,589
Interest included in income
Nonaccrual loans	140	105	349
Restructured loans	148	84	231
Total interest included in income	288	189	580	416
Net impact on interest income	971	1,115	2,009	2,297
Commercial
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	12,065		12,065		7,809
Total impaired loans	18,146		18,146		10,482
Real estate-construction
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	7,243		7,243		10,005
Total impaired loans	8,525		8,525		17,387
Real estate-commercial
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	36,116		36,116		28,349
Total impaired loans	43,513		43,513		34,520
Real estate-residential
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	5,069		5,069		5,692
Total impaired loans	10,189		10,189		11,331
Installment
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	319		319		371
Total impaired loans	432		432		485
Home equity
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	2,281		2,281		2,073
Total impaired loans	$ 2,382		$ 2,382		$ 2,174