INVESTMENT SECURITIES, Investment Securities Pledged as Collateral (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Deposits	$ 897,202	$ 966,751
Repurchase Agreements	655,437	650,627
Other	79,486	81,408
Total investments pledged as collateral	$ 1,632,125	$ 1,698,786