CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net earnings (loss) available to common stockholders	$ 1,131	$ (1,303)
Other comprehensive income:
Currency translation adjustment, net of taxes of $17 in 2019 and $25 in 2018	540	4,017
Unrealized holding gains on marketable securities arising during the period, net of taxes of $0 in 2019 and $20 in 2018	0	(31)
Change in unfunded SERP liability, net of taxes of ($11) in 2019 and ($25) in 2018	37	86
Other comprehensive income	577	4,072
Comprehensive income	$ 1,708	$ 2,769