Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Narrative) (Details)

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INCOME TAXES (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 22, 2017
Dec. 21, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Federal statutory income tax rate, percent 21.00% 35.00%      
Effective income taxes     31.40% 25.70% 25.80%
Tax credits     $ 858 $ 1,973 $ 913
Tax expense due to the tax act     6,250 $ 0 $ 0
Minimum          
Tax expense due to the tax act     5,000    
Maximum          
Tax expense due to the tax act     $ 8,000