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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net earnings	$ 15,749	$ 13,125	$ 39,683	$ 46,623
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	719	1,595	(2,997)	7,051
Amortization of:
Unrecognized gain	(10)	(165)	(31)	(496)
Unrecognized actuarial gains	0	0	12	472
Income tax related to pension and postretirement plans	4	66	8	10
Pension and postretirement plans, net of tax	(6)	(99)	(11)	(14)
Total other comprehensive income (loss), net of tax	713	1,496	(3,008)	7,037
Comprehensive income	$ 16,462	$ 14,621	$ 36,675	$ 53,660

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