CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Tax effects on unrealized gains/(losses) on marketable securities	$ 86	$ 7,435	$ 839
Tax effect on unrealized gains/(losses) on adjusted basis for marketable debt security			1,199
Tax effects on reclassification adjustment for (gains)/losses included in net income (loss)	0	693	4,921
Tax effect on pension liability amortization	319	259	325
Tax effect on Pension liability adjustment	2,421	405	89
Tax effect on amortization of (gains)/losses on cash flow hedges	239	2,119	18
Accumulated Other Comprehensive Income
Tax effects on unrealized gains/(losses) on marketable securities	86	7,435	839
Tax effect on unrealized gains/(losses) on adjusted basis for marketable debt security			1,199
Tax effects on reclassification adjustment for (gains)/losses included in net income (loss)	0	693	4,921
Tax effect on pension liability amortization	319	259	325
Tax effect on Pension liability adjustment			89
Tax effect on amortization of (gains)/losses on cash flow hedges	$ 239	$ 2,119	$ 18