CASH AND SECURITIES (Securities Pledged) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Pledged Financial Instruments, Not Separately Reported, Securities [Abstract]
State and local governments public deposits, carrying value	$ 116,273
Interest rate swap counterparties, carrying value	11,051
Retail repurchase transaction accounts, carrying value	98,735
Other, carrying value	248
Total pledged securities, carrying value	226,307
State and local governments public deposits, amortized cost	116,242
Interest rate swap counterparties, amortized cost	10,648
Retail repurchase transaction accounts, amortized cost	98,435
Other, amortized cost	248
Total pledged securities, amortized cost	225,573
State and local governments public deposits, fair value	122,130
Interest rate swap counterparties, fair value	11,051
Retail repurchase transaction accounts, fair value	98,735
Other, fair value	248
Total pledged securities, fair value	$ 232,164