CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other comprehensive income:
Currency translation adjustment, tax	$ (181)	$ 212	$ (57)	$ (4)
Reclassification adjustment for gain (loss) on sale of marketable securities included in net earnings, tax	0	(37)	0	(37)
Unrealized holding losses on marketable securities arising during the period, tax	(7)	28	58	17
Change in unfunded SERP liability, tax	$ 14	$ 24	$ 42	$ 20