INTEREST-BEARING DEPOSITS AND SECURITIES (Securities Pledged) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015
Pledged Financial Instruments, Not Separately Reported, Securities [Abstract]
State and local governments public deposits	$ 105,891
Interest rate swap counterparties	13,383
Retail repurchase agreements	113,680
Other	248
Total pledged securities and interest-bearing deposits	233,202
State and local governments public deposits, amortized cost	105,831
Interest rate swap counterparties, amortized cost	12,786
Retail repurchase agreements, amortized cost	112,900
Other, Amortized Cost	248
Total pledged securities and interest-bearing deposits, amortized cost	231,765
State and local governments public deposits, fair value	112,123
Interest rate swap counterparties, fair value	13,383
Retail repurchase agreements, fair value	113,680
Other, Fair Value	248
Total pledged securities and interest-bearing deposits, fair value	$ 239,434