CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY [Abstract]
Unrealized holding gains (losses) on marketable securities, tax effect	$ (310)	$ 280	$ 2,648
Reclassification adjustment of unrealized holding gains included in net earnings (loss), tax effect	(45)	0	(2,629)
Change in unfunded SERP liability, taxes	$ (306)	$ (294)	$ 264