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SECURITIES: (Details 4) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Rollforward of the credit losses recognized in earnings      
Beginning balance, January 1, $ 13,995 $ 14,050 $ 14,079
Amounts related to the credit loss for which other-than-temporary impairment was previously recognized 0 0 0
Amounts realized for securities sold during the period
Reductions for increase in cash flows expected to be collected that are recognized over the remaining life of the security (21) (55) (29)
Increases to the amount related to the credit loss for which other- than-temporary impairment was previously recognized 0 0 0
Ending balance, December 31, $ 13,974 $ 13,995 $ 14,050