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Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Statement of Comprehensive Income [Abstract]        
Net earnings $ 7,901 $ 8,814 $ 12,128 $ 13,446
Other comprehensive income (loss):        
Foreign currency translation adjustment 536 (74) (160) 66
Pension and postretirement benefits, net of tax 108 148 239 269
Comprehensive income $ 8,545 $ 8,888 $ 12,207 $ 13,781