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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Activity for RSUs | The following table presents the activity for RSUs under the Plans:
|  | Years Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
|  | Non-vested RSUs |  |  | Weighted Average Grant Date Fair Value |  |  | Non-vested RSUs |  |  | Weighted Average Grant Date Fair Value |  |  | Non-vested RSUs |  |  | Weighted Average Grant Date Fair Value |
Non-vested RSUs — beginning of period |  |  | 942,203 |  |  | $ | 26.58 |  |  |  | 1,115,005 |  |  | $ | 21.50 |  |  |  | 1,327,306 |  |  | $ | 18.34 |
Granted |  |  | 501,954 |  |  | $ | 26.81 |  |  |  | 426,583 |  |  | $ | 29.14 |  |  |  | 397,492 |  |  | $ | 30.27 |
Vested |  |  | (688,376 | ) |  | $ | 25.09 |  |  |  | (557,314 | ) |  | $ | 19.01 |  |  |  | (569,891 | ) |  | $ | 20.42 |
Forfeited or expired |  |  | (23,747 | ) |  | $ | 27.17 |  |  |  | (42,071 | ) |  | $ | 22.36 |  |  |  | (39,902 | ) |  | $ | 18.36 |
Non-vested RSUs — end of period |  |  | 732,034 |  |  | $ | 28.08 |  |  |  | 942,203 |  |  | $ | 26.58 |  |  |  | 1,115,005 |  |  | $ | 21.50 |
Summary of Activity for Options | The following table presents the activity for options under the Plans:
|  | Years Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
|  | Options |  |  | Weighted Average Exercise Price |  |  | Options |  |  | Weighted Average Exercise Price |  |  | Options |  |  | Weighted Average Exercise Price |
Outstanding — beginning of period |  |  | 255,649 |  |  | $ | 21.74 |  |  |  | 420,712 |  |  | $ | 21.97 |  |  |  | 1,793,214 |  |  | $ | 22.38 |
Exercised |  |  | (88,336 | ) |  | $ | 21.15 |  |  |  | (123,650 | ) |  | $ | 18.78 |  |  |  | (1,351,684 | ) |  | $ | 22.46 |
Forfeited or expired |  |  | (31,580 | ) |  | $ | 27.04 |  |  |  | (41,413 | ) |  | $ | 32.32 |  |  |  | (20,818 | ) |  | $ | 22.66 |
Outstanding — end of period |  |  | 135,733 |  |  | $ | 20.88 |  |  |  | 255,649 |  |  | $ | 21.74 |  |  |  | 420,712 |  |  | $ | 21.97 |
Exercisable at end of period |  |  | 135,733 |  |  | $ | 20.88 |  |  |  | 255,649 |  |  | $ | 21.74 |  |  |  | 420,712 |  |  | $ | 21.97 |
Summary of Information with Respect to Options Outstanding and Exercisable | The following table summarizes information with respect to options outstanding and exercisable under the Plans at December 31, 2013:
|  | Options Outstanding and Exercisable |
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life (In Years) |  |  | Aggregate Intrinsic Value (In Thousands) |
$14.45 – $29.93 |  |  | 135,733 |  |  | $ | 20.88 |  |  |  | 0.95 |  |  | $ | 1,227 |
Effect of Recording Stock-Based Compensation | The following table reflects the effect of recording stock-based compensation for the years 2013, 2012 and 2011:
|  | Years Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Stock-based compensation expense by type of award: |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock |  | $ | 12,982 |  |  | $ | 11,836 |  |  | $ | 10,126 |
Employee stock purchase plan |  |  | 1,010 |  |  |  | 1,195 |  |  |  | 1,099 |
Total stock-based compensation |  |  | 13,992 |  |  |  | 13,031 |  |  |  | 11,225 |
Tax effect on stock-based compensation |  |  | (495 | ) |  |  | (1,862 | ) |  |  | (5,019 | )
Net effect on net income |  | $ | 13,497 |  |  | $ | 11,169 |  |  | $ | 6,206 |
Effect on net earnings per share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.25 |  |  | $ | 0.21 |  |  | $ | 0.12 |
Diluted |  | $ | 0.25 |  |  | $ | 0.21 |  |  | $ | 0.12 |
Pre-Tax Effect Within Consolidated Statements of Operations of Recording Stock-Based Compensation | The pre-tax effect within the consolidated statements of operations and comprehensive income of recording stock-based compensation for the years 2013, 2012 and 2011 was as follows:
|  | Years Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Cost of sales |  | $ | 2,038 |  |  | $ | 1,867 |  |  | $ | 1,511 |
Research and development expense |  |  | 1,902 |  |  |  | 2,278 |  |  |  | 2,197 |
Selling, general and administrative expense |  |  | 10,052 |  |  |  | 8,886 |  |  |  | 7,517 |
Total pre-tax stock-based compensation expense |  | $ | 13,992 |  |  | $ | 13,031 |  |  | $ | 11,225 |
Fair Value of Employees' Purchase Rights Estimated using Black-Scholes Option-Pricing Model | The fair value of the employees’ purchase rights was estimated using the Black-Scholes option-pricing model with the following weighted average assumptions:
|  | Years Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Employee stock purchase rights: |  |  |  |  |  |  |  |  |  |  |  |
Expected life (years) |  |  | 0.5 |  |  |  | 0.5 |  |  |  | 0.5 |
Risk-free interest rate |  |  | 0.1 | % |  |  | 0.1 | % |  |  | 0.2 | %
Expected volatility |  |  | 27.7 | % |  |  | 32.2 | % |  |  | 31.9 | %
Expected annual dividends per share |  | $ | 0.64 |  |  | $ | 0.62 |  |  | $ | 0.60 |

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