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Stock Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2013
Stock Compensation Plan Activity | Stock compensation plan activity for the years 2013, 2012 and 2011 follows:
|  | 2013 |  |  | 2012 |  |  | 2011 |
|  | (in thousands) |
Restricted Stock Units: |  |  |  |  |  |  |  |  |  |  |  |
Non-vested at January 1 |  |  | 4,970 |  |  |  | 5,840 |  |  |  | 6,963 |
Awarded |  |  | 2,110 |  |  |  | 1,844 |  |  |  | 1,936 |
Vested |  |  | (2,322 | ) |  |  | (2,510 | ) |  |  | (2,624 | )
Forfeited |  |  | (122 | ) |  |  | (204 | ) |  |  | (435 | )
Non-vested at December 31 |  |  | 4,636 |  |  |  | 4,970 |  |  |  | 5,840 |
Stock Options: |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at January 1 |  |  | 3,841 |  |  |  | 5,335 |  |  |  | 7,194 |
Granted |  |  | 213 |  |  |  | 151 |  |  |  | 145 |
Assumed from acquisition |  |  | — |  |  |  | — |  |  |  | 2,828 |
Exercised |  |  | (1,220 | ) |  |  | (1,396 | ) |  |  | (965 | )
Forfeited |  |  | (104 | ) |  |  | (203 | ) |  |  | — |
Cancelled |  |  | (24 | ) |  |  | (46 | ) |  |  | (3,867 | )
Outstanding at December 31 |  |  | 2,706 |  |  |  | 3,841 |  |  |  | 5,335 |
Vested and expected to vest at December 31 |  |  | 2,694 |  |  |  | 3,785 |  |  |  | 4,904 |
Exercisable at December 31 |  |  | 1,814 |  |  |  | 2,004 |  |  |  | 1,844 |
Share Based Compensation Total Shares Available | Total shares available for the years 2013, 2012 and 2011:
|  | 2013 |  |  | 2012 |  |  | 2011 |
|  | (in thousands) |
Shares available: |  |  |  |  |  |  |  |  |  |  |  |
Available for grant at January 1 |  |  | 6,414 |  |  |  | 8,205 |  |  |  | 9,851 |
Options granted |  |  | (213 | ) |  |  | (151 | ) |  |  | (145 | )
Restricted stock units granted |  |  | (2,110 | ) |  |  | (1,844 | ) |  |  | (1,936 | )
Restricted stock units forfeited |  |  | 122 |  |  |  | 204 |  |  |  | 435 |
Additional shares reserved |  |  | 10,000 |  |  |  | — |  |  |  | — |
Available for grant at December 31 |  |  | 14,213 |  |  |  | 6,414 |  |  |  | 8,205 |
Weighted-Average Restricted Stock Unit Award Date Fair Value | Weighted-average restricted stock unit award date fair value information for the years 2013, 2012 and 2011 follows:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Non-vested at January 1 |  | $ | 12.72 |  |  | $ | 10.01 |  |  | $ | 7.92 |
Awarded |  |  | 16.53 |  |  |  | 16.67 |  |  |  | 15.77 |
Vested |  |  | 10.40 |  |  |  | 9.29 |  |  |  | 8.56 |
Forfeited |  |  | 15.48 |  |  |  | 13.32 |  |  |  | 9.24 |
Non-vested at December 31 |  | $ | 15.56 |  |  | $ | 12.72 |  |  | $ | 10.01 |
Restricted Stock Unit Awards Aggregate Intrinsic Value | Restricted stock unit awards aggregate intrinsic value information at December 31 for the years 2013, 2012 and 2011 follows:
|  | 2013 |  |  | 2012 |  |  | 2011 |
|  | (in thousands) |
Outstanding |  | $ | 81,680 |  |  | $ | 83,949 |  |  | $ | 79,598 |
Expected to vest |  |  | 77,388 |  |  |  | 78,718 |  |  |  | 75,860 |
Restricted Stock Units Weighted Average Contractual Terms | Restricted stock units weighted average contractual terms (in years) information at December 31, for the years 2013, 2012 and 2011 follows:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Outstanding |  |  | 1.14 |  |  |  | 1.01 |  |  |  | 1.04 |
Expected to vest |  |  | 1.13 |  |  |  | 1.00 |  |  |  | 1.03 |
Weighted Average Stock Options Exercise Price | Weighted average stock options exercise price information for the years 2013, 2012 and 2011 follows:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Outstanding at January 1 |  | $ | 4.64 |  |  | $ | 4.12 |  |  | $ | 16.32 |
Options granted |  |  | 16.56 |  |  |  | 16.95 |  |  |  | 16.23 |
Assumed from acquisition |  |  | — |  |  |  | — |  |  |  | 2.69 |
Options exercised |  |  | 3.28 |  |  |  | 3.87 |  |  |  | 4.38 |
Options forfeited |  |  | 2.57 |  |  |  | 3.11 |  |  |  | — |
Options cancelled |  |  | 8.05 |  |  |  | 16.21 |  |  |  | 26.38 |
Outstanding at December 31 |  |  | 6.29 |  |  |  | 4.64 |  |  |  | 4.12 |
Exercisable at December 31 |  |  | 4.55 |  |  |  | 3.70 |  |  |  | 4.10 |
Stock Option Aggregate Intrinsic Value Information | Stock option aggregate intrinsic value information for the years ended December 31, 2013, 2012 and 2011 follows:
|  | 2013 |  |  | 2012 |  |  | 2011 |
|  | (in thousands) |
Exercised |  | $ | 16,848 |  |  | $ | 17,136 |  |  | $ | 11,307 |
Outstanding |  |  | 30,673 |  |  |  | 47,051 |  |  |  | 51,306 |
Vested and expected to vest |  |  | 30,512 |  |  |  | 46,283 |  |  |  | 46,655 |
Exercisable |  |  | 23,707 |  |  |  | 26,436 |  |  |  | 17,766 |
Stock Options Weighted Average Contractual Terms | Stock options weighted average contractual terms (in years) information at December 31, for the years 2013, 2012 and 2011 follows:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Outstanding |  |  | 4.9 |  |  |  | 5.7 |  |  |  | 6.4 |
Vested and Expected to vest |  |  | 4.9 |  |  |  | 5.6 |  |  |  | 6.2 |
Exercisable |  |  | 4.3 |  |  |  | 4.9 |  |  |  | 4.0 |
Significant Option Groups Outstanding | Significant option groups outstanding at December 31, 2013 and related weighted average price and remaining contractual life information follow:
|  | Options Outstanding |  |  | Options Exercisable |
Range Of Exercise Prices |  | Weighted- Average Remaining Contractual Life (Years) |  |  | Shares |  |  | Weighted- Average Exercise Price |  |  | Shares |  |  | Weighted- Average Exercise Price |
|  | (shares in thousands) |
$0.94 – $2.58 |  |  | 5.97 |  |  |  | 485 |  |  | $ | 1.83 |  |  |  | 436 |  |  | $ | 1.79 |
$2.67 – $2.74 |  |  | 5.39 |  |  |  | 821 |  |  |  | 2.69 |  |  |  | 545 |  |  |  | 2.70 |
$3.23 – $7.71 |  |  | 3.80 |  |  |  | 674 |  |  |  | 5.15 |  |  |  | 590 |  |  |  | 5.00 |
$9.34 – $16.95 |  |  | 4.64 |  |  |  | 726 |  |  |  | 14.39 |  |  |  | 243 |  |  |  | 12.58 |
|  |  |  |  |  |  | 2,706 |  |  | $ | 6.29 |  |  |  | 1,814 |  |  | $ | 4.55 |

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