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Schedule of Information Related to Stock Repurchase Programs (Detail) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended |  | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2010 Stock Repurchase Programs Twenty Ten | Dec. 31, 2011 Stock Repurchase Programs Twenty Eleven | Dec. 31, 2012 Stock Repurchase Programs Twenty Twelve | Dec. 31, 2013 Stock Repurchase Programs Twenty Thirteen
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Total number of shares purchased as part of publicly announced programs | 1,384,637 |  |  | 1,384,637 |  |  |  |  |
Total price paid for shares purchased as part of publicly announced programs | $ 50,576 |  |  | $ 50,576 |  |  |  |  |
Total number of shares purchased related to stock-based compensation plans | 1,078,131 | [1] |  | 217,649 | [1] | 433,312 | [1] | 427,170 | [1]
Total price paid for shares purchased related to stock-based compensation plans | $ 56,261 |  |  | $ 9,906 |  | $ 19,154 |  | $ 27,201 |
Aggregate number of shares purchased | 2,462,768 |  |  | 1,602,286 |  | 433,312 |  | 427,170 |
Aggregate price paid for shares purchased | $ 106,837 |  |  | $ 60,482 |  | $ 19,154 |  | $ 27,201 |
Maximum number of shares that may yet be purchased under the publicly announced program |  |  | 2,152,339 | 767,702 |  | 767,702 |  | 767,702 |
[1] | During 2013, there were 427,170 shares repurchased at an average price of $63.68 per share related to income tax withholding obligations in connection with stock-based compensation programs. During 2012, there were 432,562 shares repurchased at an average price of $44.28 per share related to income tax withholding obligations in connection with stock-based compensation programs, and 750 shares repurchased at an average of $.01 per share related to restricted shares that were forfeited by former employees pursuant to the terms of our restricted stock purchase plan. During 2011, there were 217,649 shares repurchased at an average price of $45.51 per share related to income tax withholding obligations in connection with stock-based compensation programs.

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