CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net (loss) earnings available to common stockholders	$ (1,303)	$ 746
Other comprehensive income:
Currency translation adjustment, net of taxes of $25 in 2018 and ($32) in 2017	4,017	1,910
Unrealized holding gains on marketable securities arising during the period, net of taxes of $20 in 2018 and $178 and 2017	(31)	(279)
Change in unfunded SERP liability, net of taxes of ($25) in 2018 and ($32) in 2017	86	62
Other comprehensive income	4,072	1,693
Comprehensive income	$ 2,769	$ 2,439