LOANS (excluding covered loans) - Nonaccrual, Restructured and Impaired Loans (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financing Receivable, Modifications [Line Items]
Restructured loans - nonaccrual status	$ 14,600,000		$ 13,000,000
Interest included in income
Loans and Leases Receivable-Nonaccrual, future commitment to lend	0	2,691,000
Non Covered Loans
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	35,334,000		37,605,000
Restructured loans - accrual status	13,400,000		15,094,000
Restructured loans - nonaccrual status	14,600,000		13,000,000
Total restructured loans	28,000,000		28,100,000
Total impaired loans	48,734,000		52,699,000
Interest income effect
Gross amount of interest that would have been recorded under original terms	809,000	1,122,000
Interest included in income
Nonaccrual loans	75,000	214,000
Restructured loans	109,000	101,000
Interest income recognized	184,000	315,000	974,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	625,000	807,000
Non Covered Loans | Commercial
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	7,097,000		7,934,000
Total impaired loans	11,016,000		12,225,000
Interest included in income
Interest income recognized	33,000		236,000
Non Covered Loans | Real estate-construction
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	223,000		223,000
Total impaired loans	223,000		223,000
Interest included in income
Interest income recognized	0		7,000
Non Covered Loans | Real estate-commercial
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	16,758,000		17,286,000
Total impaired loans	21,976,000		23,993,000
Interest included in income
Interest income recognized	84,000		490,000
Non Covered Loans | Real estate - residential
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	8,157,000		8,606,000
Total impaired loans	12,021,000		12,307,000
Interest included in income
Interest income recognized	52,000		189,000
Non Covered Loans | Installment
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	399,000		574,000
Total impaired loans	465,000		642,000
Interest included in income
Interest income recognized	2,000		6,000
Non Covered Loans | Home equity
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	2,700,000		2,982,000
Total impaired loans	3,033,000		3,309,000
Interest included in income
Interest income recognized	13,000		46,000
Non Covered Loans | Other Loans [Member]
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	0		0
Total impaired loans	0		0
Interest included in income
Interest income recognized	$ 0		$ 0