CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net earnings	$ 7,836	$ 2,491	$ 9,689	$ 4,804
Other comprehensive income:
Currency translation adjustment, net of taxes of $212, $0, ($4) and $0, respectively	1,820	51	638	(283)
Reclassification adjustment for (gain on sale) write-down of marketable securities included in net earnings, net of tax of ($37), $113, ($37) and $295, respectively	(61)	185	(61)	481
Unrealized holding losses on marketable securities arising during the period, net of taxes of $28, ($59), $17 and ($118), respectively	46	(95)	28	(187)
Change in unfunded SERP liability, net of taxes of $24, $18, $20 and $53, respectively	53	40	46	120
Other comprehensive income	1,858	181	651	131
Comprehensive income	$ 9,694	$ 2,672	$ 10,340	$ 4,935