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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net earnings	$ 12,204	$ 8,948
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	1,785	(3,074)
Amortization of:
Prior service benefit	(13)	(29)
Unrecognized loss	275	618
Foreign currency exchange rate changes	4	8
Income tax expense related to pension and postretirement plans	(108)	(241)
Pension and postretirement plans, net of tax	158	356
Total other comprehensive income (loss), net of tax	1,943	(2,718)
Comprehensive income	$ 14,147	$ 6,230

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