LOANS (covered) - Carrying Value of Purchased Impaired and Nonimpaired Loans (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	$ 622,265	$ 748,116
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	69,562	102,126
Real estate-construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	9,647	10,631
Real estate-commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	389,282	465,555
Real estate-residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	90,707	100,694
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	7,057	8,674
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	53,214	57,458
All other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	2,796	2,978
Loans Accounted for Under FASB ASC Topic 310-30
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	558,400	674,157
Loans Accounted for Under FASB ASC Topic 310-30 | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	67,718	94,775
Loans Accounted for Under FASB ASC Topic 310-30 | Real estate-construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	9,647	10,631
Loans Accounted for Under FASB ASC Topic 310-30 | Real estate-commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	382,547	458,066
Loans Accounted for Under FASB ASC Topic 310-30 | Real estate-residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	90,707	100,694
Loans Accounted for Under FASB ASC Topic 310-30 | Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	6,409	7,911
Loans Accounted for Under FASB ASC Topic 310-30 | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	1,372	2,080
Loans Accounted for Under FASB ASC Topic 310-30 | All other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	0	0
Loans Excluded from FASB ASC Topic 310-30
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	63,865	73,959
Loans Excluded from FASB ASC Topic 310-30 | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	1,844	7,351
Loans Excluded from FASB ASC Topic 310-30 | Real estate-construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	0	0
Loans Excluded from FASB ASC Topic 310-30 | Real estate-commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	6,735	7,489
Loans Excluded from FASB ASC Topic 310-30 | Real estate-residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	0	0
Loans Excluded from FASB ASC Topic 310-30 | Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	648	763
Loans Excluded from FASB ASC Topic 310-30 | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	51,842	55,378
Loans Excluded from FASB ASC Topic 310-30 | All other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Purchased Loans	$ 2,796	$ 2,978