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Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2011

Shareholders' Equity [Abstract]

Summary Of Stock Option Activity And Related Information

		Options in thousands												Weighted average exercise price
		2009				2010				2011				2009				2010				2011
Outstanding at beginning of year			21,582				16,601				14,192			$	20.97			$	23.12			$	23.85
Granted			1,845				2,139				2,125			$	25.86			$	30.69			$	52.92
Exercised			(6,039	)			(4,062	)			(2,324	)		$	16.40			$	24.15			$	22.83
Expired			(591	)			(470	)			(602	)		$	23.31			$	26.57			$	26.97
Forfeited			(196	)			(16	)			(54	)		$	19.60			$	21.95			$	27.89
Outstanding at December 31,			16,601	*)			14,192				13,337			$	23.12			$	23.85			$	28.50
Exercisable at December 31,			10,469				8,695				8,429			$	22.86			$	22.09			$	24.21

*) As of December 31, 2011, approximately 13.2 million options were outstanding and expected to vest. Options expected to vest reflect an estimated forfeiture rate for purposes of determining related compensation expense.

Summary Of Options Outstanding And Aggregate Intrinsic Value

		Year ended December 31, 2011
		Options				Aggregate intrinsic value
		In thousands
Outstanding at beginning of year		$	14,192			$	318,075
Granted			2,125				N/A
Exercised			(2,324	)
Forfeited			(656	)			N/A
Outstanding as of December 31,		$	13,337			$	321,753
Exercisable as of December 31,		$	8,429			$	239,032

Summary Of Restricted Stock Units Award Activity

		Year ended December 31,
		2009				2010				2011
		Number in thousands
Outstanding at beginning of year			1,398				1,612				1,254
Granted			755				371				389
Vested			(398	)			(530	)			(425	)
Forfeited			(143	)			(199	)			(107	)
Outstanding as of December 31,			1,612				1,254				1,111

Summary Of Options Outstanding By Exercise Price Range

		Outstanding												Exercisable
Exercise price $		Number of options (in thousands)				Weighted average remaining contractual life (years)				Weighted average exercise price				Number of options (in thousands)				Weighted average remaining contractual life (years)				Weighted average exercise price
										$												$
6.08-6.08			1				2.13				6.08				1				2.13				6.08
16.80-16.80			2,200				1.58				16.80				2,200				1.58				16.80
18.56-22.95			447				3.30				21.71				153				2.48				21.64
23.19-23.65			3,951				1.81				23.44				3,112				2.06				23.50
24.01-26.47			2,225				4.13				25.25				1,625				4.08				25.11
26.77-29.49			1,965				5.37				29.12				825				5.46				29.41
32.31-35.79			399				5.22				34.83				87				5.22				34.87
43.95-46.01			49				5.98				45.00				6				5.86				43.95
51.98-59.59			2,100				6.38				53.00				420				6.39				53.05
6.08-59.59			13,337				3.57				28.50				8,429				2.92				24.21

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