CASH AND SECURITIES (Available-for-sale Securities Debt Maturities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Amortized Cost
Maturing in one year or less	$ 25,136	$ 16,369
Maturing after one year through five years	322,493	205,913
Maturing after five years through ten years	58,468	132,372
Maturing after ten years through twenty years	15,535	43,386
Maturing after twenty years	53,328	71,610
Amoritzed cost	474,960	469,650
Fair Value
Maturing in one year or less	25,256	16,393
Maturing after one year through five years	319,489	207,147
Maturing after five years through ten years	57,782	133,407
Maturing after ten years through twenty years	15,135	43,414
Maturing after twenty years	52,618	72,559
Fair Value	$ 470,280	$ 472,920