CASH AND SECURITIES (Securities Pledged) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Pledged Financial Instruments, Not Separately Reported, Securities [Abstract]
State and local governments public deposits, amortized cost	$ 119,426
Interest rate swap counterparties, amortized cost	12,149
Retail repurchase transaction accounts, amortized cost	107,225
Other, amortized cost	2,176
Total pledged securities, amortized cost	240,976
State and local governments public deposits, fair value	125,433
Interest rate swap counterparties, fair value	12,480
Retail repurchase transaction accounts, fair value	109,479
Other, fair value	2,205
Total pledged securities, fair value	$ 249,597