SECURITIES: (Details 2) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Amortized Cost
Due in one year or less	$ 4,683
Due after one but within five years	30,765
Due after five but within ten years	83,483
Due after ten years	131,353
Total of securities having specified maturity period	250,284
Mortgage-backed securities and collateralized mortgage obligations	561,085
TOTAL	811,369	$ 855,521
Fair Value
Due in one year or less	4,701
Due after one but within five years	31,338
Due after five but within ten years	85,726
Due after ten years	138,157
Total of securities having specified maturities period	259,922
Mortgage-backed securities and collateralized mortgage obligations	555,009
TOTAL	$ 814,931	$ 853,725