LOANS (excluding covered loans) - Restructured Loans (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013 loans	Sep. 30, 2012 loans	Sep. 30, 2013 loans D	Sep. 30, 2012 loans	Dec. 31, 2012 loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured Loans, Nonaccrual Status	$ 13,000,000		$ 13,000,000		$ 14,100,000
Loans and Leases Receivable, Impaired, Commitment to Lend	600,000		600,000		3,500,000
Non Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Extended Maturities	2,179,000	6,144,000	8,848,000	13,404,000
Adjusted Interest Rates	0	0	520,000	166,000
Combined Rate And Maturity	613,000	0	850,000	563,000
Forebearance Agreements	0	2,565,000	0	3,801,000
Other	807,000	395,000	3,786,000	616,000
Total	3,599,000	9,104,000	14,004,000	18,550,000
Number of Restructured Loans	215		215		145
Restructured loans, Number of Loans	25	14	113	40
Restructured loans, Restructured loans, Pre-Modification Loan Balance	3,711,000	8,892,000	16,705,000	18,376,000
Restructured loans, Period End Balance	3,599,000	9,104,000	14,004,000	18,550,000
Restructured loans with payment default within 12 months of modification, Number of Loans			18	2
Restructured loans with payment default within 12 months of modification, Period End Balance			5,220,000	1,133,000
Total restructured loans	29,300,000		29,300,000		25,000,000
Restructured loans on accrual status	16,278,000		16,278,000		10,856,000
Restructured Loans, Nonaccrual Status	13,000,000		13,000,000		14,100,000
Allowance for loan and lease losses lncluded in reserves for restructured loans	4,000,000		4,000,000		3,000,000
Restructured loans uncollectible portion written off	1,200,000		2,400,000		7,200,000
Accruing TDRs performing in accordance with restructured terms for more than one year	8,400,000		8,400,000		2,700,000
Restructured loans performance threshold (days)			90
Non Covered Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans	4	6	14	16
Restructured loans, Restructured loans, Pre-Modification Loan Balance	494,000	3,787,000	8,233,000	8,358,000
Restructured loans, Period End Balance	490,000	4,027,000	6,105,000	8,589,000
Restructured loans with payment default within 12 months of modification, Number of Loans			4	2
Restructured loans with payment default within 12 months of modification, Period End Balance			4,882,000	1,133,000
Non Covered Loans | Real estate-construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans	0	0	0	0
Restructured loans, Restructured loans, Pre-Modification Loan Balance	0	0	0	0
Restructured loans, Period End Balance	0	0	0	0
Restructured loans with payment default within 12 months of modification, Number of Loans			0	0
Restructured loans with payment default within 12 months of modification, Period End Balance			0	0
Non Covered Loans | Real estate-commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans	10	8	17	22
Restructured loans, Restructured loans, Pre-Modification Loan Balance	2,502,000	5,105,000	4,752,000	9,854,000
Restructured loans, Period End Balance	2,493,000	5,077,000	4,719,000	9,795,000
Restructured loans with payment default within 12 months of modification, Number of Loans			2	0
Restructured loans with payment default within 12 months of modification, Period End Balance			63,000	0
Non Covered Loans | Real estate - residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans	3	0	33	2
Restructured loans, Restructured loans, Pre-Modification Loan Balance	387,000	0	2,356,000	164,000
Restructured loans, Period End Balance	367,000	0	2,178,000	166,000
Restructured loans with payment default within 12 months of modification, Number of Loans			3	0
Restructured loans with payment default within 12 months of modification, Period End Balance			185,000	0
Non Covered Loans | Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans	3	0	14	0
Restructured loans, Restructured loans, Pre-Modification Loan Balance	34,000	0	188,000	0
Restructured loans, Period End Balance	33,000	0	115,000	0
Restructured loans with payment default within 12 months of modification, Number of Loans			4	0
Restructured loans with payment default within 12 months of modification, Period End Balance			26,000	0
Non Covered Loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans	5	0	35	0
Restructured loans, Restructured loans, Pre-Modification Loan Balance	294,000	0	1,176,000	0
Restructured loans, Period End Balance	216,000	0	887,000	0
Restructured loans with payment default within 12 months of modification, Number of Loans			5	0
Restructured loans with payment default within 12 months of modification, Period End Balance			64,000	0
Non Covered Loans | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum			$ 100,000