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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2016
Stockholders' Equity Note [Abstract] |
Assumptions Used In The Weighted Average Fair Value Of The Stock Options Granted | The weighted average fair value of the Company’s stock options granted during 2016, 2015 and 2014 were $12.43, $12.16 and $10.88, respectively, using the following assumptions:
|  | 2016 |  | 2015 |  | 2014
Expected term (in years) |  | 6.00 |  |  | 5.58 |  |  | 6.79 |
Expected volatility |  | 25.44 | % |  | 23.86 | % |  | 26.98 | %
Expected dividend yield |  | 1.10 | % |  | 1.00 | % |  | 1.15 | %
Risk-free interest rate |  | 2.18 | % |  | 1.90 | % |  | 2.04 | %
Stock-based Compensation Expense | The Company recognized stock-based compensation expense in its Consolidated Financial Statements in 2016, 2015 and 2014 as follows:
|  | 2016 |  | 2015 |  | 2014
Stock-based compensation expense |  | $ | 16,017 |  |  | $ | 17,312 |  |  | $ | 13,463 |
Less: Deferred tax benefit |  | (5,612 | ) |  | (6,107 | ) |  | (4,704 | )
Stock-based compensation expense, net of tax |  | $ | 10,405 |  |  | $ | 11,205 |  |  | $ | 8,759 |
Stock Option Plans | This table presents certain information relating to the Company’s stock option plans for 2016, 2015 and 2014:
|  | Number of Shares |  | Weighted Avg. Price
Balance as of December 31, 2013 |  | 23,637,000 |  |  | $ | 22.58 |
Granted |  | 2,293,000 |  |  | 40.05 |
Exercised |  | (5,261,000 | ) |  | 19.52 |
Expired or canceled |  | (208,000 | ) |  | 28.83 |
Balance as of December 31, 2014 |  | 20,461,000 |  |  | $ | 25.26 |
Granted |  | 2,005,000 |  |  | 53.34 |
Exercised |  | (2,927,000 | ) |  | 21.44 |
Expired or canceled |  | (302,000 | ) |  | 28.97 |
Balance as of December 31, 2015 |  | 19,237,000 |  |  | $ | 28.71 |
Granted |  | 2,310,000 |  |  | 49.57 |
Exercised |  | (1,809,000 | ) |  | 24.82 |
Expired or canceled |  | (1,669,000 | ) |  | 30.86 |
Balance as of December 31, 2016 |  | 18,069,000 |  |  | $ | 31.57 |
Exercisable as of December 31, 2016 |  | 6,692,000 |  |  | $ | 21.28 |
Available for future grant as of December 31, 2016 |  | 25,156,000 |  |  |
Stock Options Outstanding And Exercisable | This table summarizes information relating to all options outstanding and exercisable at December 31, 2016:
|  |  | Options Outstanding at December 31, 2016 |  | Options Exercisable at December 31, 2016
Range of Exercise Prices (Per Share) | Number of Shares |  | Weighted Average Exercise Price (Per Share) |  | Weighted Average Remaining Contractual Life (Years) |  | Number of Shares |  | Weighted Average Exercise Price (Per Share) |  | Weighted Average Remaining Contractual Life (Years)
$ | 14.62 |  | - | 15.77 | 3,021,000 |  |  | $ | 15.27 |  |  | 3.70 |  | 1,980,000 |  |  | $ | 15.01 |  |  | 3.02 |
17.65 |  | - | 21.05 | 1,854,000 |  |  | 17.67 |  |  | 3.02 |  | 1,846,000 |  |  | 17.65 |  |  | 3.00 |
22.45 |  | - | 23.86 | 3,712,000 |  |  | 23.20 |  |  | 4.93 |  | 1,513,000 |  |  | 23.20 |  |  | 4.93 |
27.03 |  | - | 39.15 | 3,321,000 |  |  | 33.18 |  |  | 4.73 |  | 1,353,000 |  |  | 33.26 |  |  | 5.19 |
40.64 |  | - | 53.34 | 6,161,000 |  |  | 47.91 |  |  | 9.06 |  | — |  |  | — |  |  | — |
|  |  | 18,069,000 |  |  |  |  |  |  | 6,692,000 |  |  |  |  |
Common Stock Buyback | The following table provides the total number of shares repurchased and the related total costs in 2016, 2015 and 2014:
Year |  | Total Number of Shares Repurchased |  | Total Cost
2016 |  | 6,600,000 |  |  | $ | 294,374 |
2015 |  | 5,951,000 |  |  | 289,587 |
2014 |  | 7,888,000 |  |  | 278,357 |

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