LOANS (excluding covered loans) - Nonaccrual, Restructured and Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Interest included in income
Loans and Leases Receivable-Nonaccrual, future commitment to lend	$ 2,691	$ 0
Non Covered Loans
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	42,128		50,930
Restructured loans - accrual status	12,757		10,856
Restructured loans - nonaccrual status	22,324		14,111
Total restructured loans	35,081		24,967
Total impaired loans	77,209		75,897
Interest income effect
Gross amount of interest that would have been recorded under original terms	1,122	1,330
Interest included in income
Nonaccrual loans	72	209
Restructured loans	243	83
Total interest included in income	315	292
Net impact on interest income	807	1,038
Non Covered Loans | Commercial
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	4,044		10,562
Total impaired loans	19,393		18,521
Non Covered Loans | Real estate-construction
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	945		950
Total impaired loans	2,094		2,102
Non Covered Loans | Real estate-commercial
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	30,311		31,002
Total impaired loans	39,770		39,796
Non Covered Loans | Real estate - residential
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	4,371		5,045
Total impaired loans	11,699		11,178
Non Covered Loans | Installment
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	211		376
Total impaired loans	412		452
Non Covered Loans | Home equity
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	1,750		2,499
Total impaired loans	3,345		3,352
Non Covered Loans | Other Loans [Member]
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	496		496
Total impaired loans	$ 496		$ 496