DEPOSITS (Maturities and Weighted Average Interest Rates of Certificates of Deposit) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Maturities of Time Deposits [Abstract]
Due in one year or less	$ 759,626	$ 972,315
Due after one year through two years	153,371	169,353
Due after two years through three years	56,419	44,738
Due after three years through four years	29,571	34,841
Due after four years through five years	26,782	26,024
Due after five years	3,524	3,226
Total certificates of deposit	$ 1,029,293	$ 1,250,497
Weighted Average Rate [Abstract]
Due in one year or less	0.64%	1.05%
Due after one year through two years	1.05%	1.37%
Due after two years through three years	1.72%	2.22%
Due after three years through four years	1.78%	2.20%
Due after four years through five years	1.59%	1.92%
Due after five years	2.66%	3.60%
Total certificates of deposits	0.82%	1.19%