Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax		$ 100,000	$ 100,000	$ 100,000	$ 200,000
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax		0	(100,000)	0	400,000
Net earnings		9,192,000	10,899,000	22,183,000	21,467,000
Currency translation		(381,000)	452,000	(873,000)	581,000
Pension plans (1)	[1]	25,000	108,000	52,000	216,000
Short-term investments (2)	[2]	0	769,000	0	(167,000)
Comprehensive income		$ 8,836,000	$ 12,228,000	$ 21,362,000	$ 22,097,000

[1] Net of tax effect of less than $0.1 million for both the three and six months ended June 30, 2018 and $0.1 million and $0.2 million for the same periods in 2017.

[2] Net of tax effect of zero for both the three and six months ended June 30, 2018 and $(0.1) million and $0.4 million for the same periods in 2017.