INTEREST-BEARING DEPOSITS AND SECURITIES (Available-for-sale Securities Debt Maturities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in one year or less, amortized cost	$ 9,539	$ 16,369
Due after one year thorugh five years, amortized cost	250,405	205,913
Due after five years through ten years, amortized cost	115,019	132,372
Due after ten years through twenty years, amortized cost	39,877	43,386
Due after twenty years, amortized cost	59,068	71,610
Amoritzed cost	473,908	469,650
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due one year or less, fair value	9,576	16,393
Due after one year through five years, fair value	251,532	207,147
Due after five years through ten years, fair value	115,980	133,407
due after ten years through twenty years, fair value	39,892	43,414
Due after twenty years, fair value	59,703	72,559
Fair Value	$ 476,683	$ 472,920