SECURITIES (Schedule of Amortized Cost and Estimated Fair Value of Securities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of amortized cost and estimated fair value of securities
Due in one year or less, Amortized Cost	$ 19,345	$ 6,791
Due in one year or less, Estimated Fair Value	19,434	6,796
Due after one year through five years, Amortized Cost	41,545	21,666
Due after one year through five years, Estimated Fair Value	43,070	22,497
Due after five years through ten years, Amortized Cost	306,900	116,735
Due after five years through ten years, Estimated Fair Value	314,044	119,269
Due after ten years, Amortized Cost	707,445	530,282
Due after ten years, Estimated Fair Value	725,566	528,786
Total securities available for sale, Amortized Cost	1,075,235	675,474
Total securities available for sale, Estimated Fair Value	$ 1,102,114	$ 677,348