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Shareholders' Equity (Tables) | 12 Months Ended
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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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