CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) [Abstract]
Net earnings	$ 2,600	$ 1,012	$ 4,939	$ 3,682
Other comprehensive income (loss):
Currency translation adjustment	51	(588)	(283)	350
Reclassification adjustment for write-down of marketable securities included in net earnings, net of tax of $113 and $295, respectively	185	0	481	0
Reclassification adjustment for gain on sale of marketable securities included in net earnings, net of tax of $45	0	0	0	(74)
Unrealized holding losses on marketable securities arising during the period, net of taxes of ($59), ($234), ($118) and ($305), respectively	(95)	(380)	(187)	(499)
Change in unfunded SERP liability, net of taxes of $18 and $53, respectively	40	0	120	0
Other comprehensive income (loss)	181	(968)	131	(223)
Comprehensive income	$ 2,781	$ 44	$ 5,070	$ 3,459