CASH AND SECURITIES (Available-for-sale Securities Debt Maturities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Amortized Cost
Due in one year or less	$ 16,369	$ 19,520
Due after one year through five years	104,917	312,862
Due after five years through ten years	51,654	38,916
Due after ten years through twenty years	21,369	0
With maturity date	194,309	371,298
Mortgage-backed securities	275,341	91,281
Amoritzed cost	469,650	462,579
Fair Value
Due in one year or less	16,393	19,602
Due after one year through five years	105,579	313,930
Due after five years through ten years	51,637	39,009
Due after ten years through twenty years	21,554	0
With maturity date	195,163	372,541
Mortgage-backed securities	277,757	93,254
Fair Value	$ 472,920	$ 465,795