SECURITIES (Schedule of Amortized Cost and Estimated Fair Values of Debt Securities by Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Available-for-sale, Amortized Cost
Due in one year or less	$ 2,186
Due after one year through five years	82,230
Due after five years through ten years	112,277
Due after ten years	579,961
Amortized cost, total	776,654
Available-for-sale, Fair Value
Due in one year or less	2,209
Due after one year through five years	82,383
Due after five years through ten years	113,046
Due after ten years	574,168
Fair value, total	771,806
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Due in one year or less	0
Due after one year through five years	0
Due after five years through ten years	2,334
Due after ten years	9,156
Held-to-maturity securities, at amortized cost	11,490	0
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value [Abstract]
Due in one year or less	0
Due after one year through five years	0
Due after five years through ten years	2,358
Due after ten years	9,301
Held-to-maturity Securities, Fair Value	$ 11,659