Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 10,824	$ 7,546
Other comprehensive income:
Foreign currency translation adjustments	(257)	421
Pension and postretirement benefits, net of tax	(12)	61
Comprehensive income	$ 10,555	$ 8,028

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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