DERIVATIVES DERIVATIVES - Disclosure by Type of Financial Instrument (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	$ 23,639	$ 26,423
Gross amounts offset in the Consolidated Balance Sheets	(22,556)	(23,726)
Net amounts of liabilities presented in the Consolidated Balance Sheets	1,083	2,697
Fair Value Hedges | Pay fixed interest rate swaps with counterparty | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	1,302	1,445
Gross amounts offset in the Consolidated Balance Sheets	(723)	(669)
Net amounts of liabilities presented in the Consolidated Balance Sheets	579	776
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	22,337	24,978
Gross amounts offset in the Consolidated Balance Sheets	(21,833)	(23,057)
Net amounts of liabilities presented in the Consolidated Balance Sheets	$ 504	$ 1,921