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Comprehensive Income (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Stockholders' Equity Note [Abstract]    
Net earnings $ 3,968 $ 2,816
Foreign currency translation adjustments 130 (119)
Pension liability, net of tax of $38 and $41, respectively 108 118
Total comprehensive income $ 4,206 $ 2,815