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Shareholders' Equity | 6 Months Ended
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Jun. 30, 2018
Stockholders' Equity Note [Abstract] |
Shareholders' Equity | Shareholders’ Equity Share count and par value data related to shareholders’ equity are as follows:
| As of
| June 30, |  | December 31,
| 2018 |  | 2017
Preferred Stock |  |  |
Par value per share | No par value |  |  | No par value |
Shares authorized | 25,000,000 |  |  | 25,000,000 |
Shares outstanding | — |  |  | — |
Common Stock |  |  |
Par value per share | No par value |  |  | No par value |
Shares authorized | 75,000,000 |  |  | 75,000,000 |
Shares issued | 56,781,065 |  |  | 56,632,488 |
Shares outstanding | 33,087,043 |  |  | 32,938,466 |
Treasury stock |  |  |
Shares held | 23,694,022 |  |  | 23,694,022 |
No common stock repurchases were made during the six months ended June 30, 2018. Through June 30, 2018, we had purchased an aggregate of $7,446 under a board-authorized share repurchase plan allowing for up to $25,000 in stock repurchases. Approximately $17,554 is available for future purchases. A roll-forward of common shares outstanding is as follows:
| Six Months Ended
| June 30, |  | June 30,
| 2018 |  | 2017
Balance at the beginning of the year | 32,938,466 |  |  | 32,762,494 |
Repurchases | — |  |  | — |
Shares issued upon exercise of stock options | — |  |  | — |
Restricted share issuances | 148,577 |  |  | 170,832 |
Balance at the end of the period | 33,087,043 |  |  | 32,933,326 |
Certain potentially dilutive restricted stock units are excluded from diluted earning per share because they are anti-dilutive. The number of awards that were anti-dilutive at June 30, 2018 and June 30, 2017 were 72,658 and 122,511, respectively.

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- References No definition available. + Details
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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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