INVESTMENT SECURITIES, Amortized Cost, Maturities and Approximate Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Amortized Cost [Abstract]
Due in one year or less	$ 28,100
Due from one to five years	143,494
Due from five to ten years	113,825
Amortized Cost	285,419	294,310
Fair Value [Abstract]
Due in one year or less	28,595
Due from one to five years	147,769
Due from five to ten years	115,193
Total securities available for sale	291,557	298,670
Amortized Cost [Abstract]
Due in one year or less	1,630
Due from one to five years	5,392
Due from five to ten years	32,073
Due after ten years	23,096
Total securities held to maturity	62,191
Total investment securities, Amortized Cost	347,610	356,580
Fair Value [Abstract]
Due in one year or less	1,644
Due from one to five years	5,792
Due from five to ten years	33,256
Due after ten years	24,722
Total securities held to maturity	65,414
Total investment securities, Fair Value	$ 356,971	$ 363,466