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Additional Information to Stock Options Exercised (Details) (Stock Options, USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Stock Options
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| Schedule Of Stock Options [Line Items] | |||
| Intrinsic value | $ 15,102 | $ 14,515 | $ 3,026 |
| Exercise proceeds | 20,211 | 22,112 | 8,991 |
| Income tax benefit | $ 4,383 | $ 4,017 | $ 511 |