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Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2013
Equity [Abstract] |
Activity Relating to Common Shares | The following table summarizes the activity relating to shares of the Company’s common stock during the nine months ended September 30, 2013 (in thousands):
|  | Issued Shares |  |  | Treasury Shares |  |  | Outstanding Shares |
Balance, as of December 31, 2012 |  |  | 41,889 |  |  |  | (1,018 | ) |  |  | 40,871 |
Conversion of preferred stock |  |  | 220 |  |  |  | — |  |  |  | 220 |
Shares repurchased |  |  | — |  |  |  | (7,258 | ) |  |  | (7,258 | )
Options exercised |  |  | 2,060 |  |  |  | — |  |  |  | 2,060 |
Restricted stock grant |  |  | 1,000 |  |  |  | — |  |  |  | 1,000 |
Shares acquired through cashless exercise (1) |  |  |  |  |  |  | (1,782 | ) |  |  | (1,782 | )
Shares cancelled |  |  | (1,782 | ) |  |  | 1,782 |  |  |  | — |
Balance, as of September 30, 2013 |  |  | 43,387 |  |  |  | (8,276 | ) |  |  | 35,111 |
(1) | All shares acquired represent shares tendered to cover the strike price for options and tax withholdings on the intrinsic value of options exercised or restricted stock vested. These shares have been cancelled by the Company.

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- Definition Tabular disclosure of the change in common stock outstanding. + References No definition available. + Details
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