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Income Per Common Share | 9 Months Ended
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Sep. 30, 2013
Earnings Per Share [Abstract] |
Income Per Common Share | Note 2: Income Per Common Share The following table sets forth the computation of basic and diluted net income per common share: (Dollars in Thousands, Except Per Share Amounts)
|  | Nine Months Ended September 30, |  |  | Three Months Ended September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 17,619 |  |  | $ | 47,044 |  |  | $ | 10,260 |  |  | $ | 6,708 |
Dividends on Series B Preferred |  |  | (240 | ) |  |  | (240 | ) |  |  | — |  |  |  | — |
Dividends on Series D Preferred |  |  | (60 | ) |  |  | (60 | ) |  |  | — |  |  |  | — |
Total dividends on preferred stocks |  |  | (300 | ) |  |  | (300 | ) |  |  | — |  |  |  | — |
Numerator for basic net income per common share—net income applicable to common stock |  |  | 17,319 |  |  |  | 46,744 |  |  |  | 10,260 |  |  |  | 6,708 |
Dividends on preferred stocks assumed to be converted, if dilutive |  |  | 300 |  |  |  | 300 |  |  |  | — |  |  |  | — |
Numerator for diluted net income per common share |  | $ | 17,619 |  |  | $ | 47,044 |  |  | $ | 10,260 |  |  | $ | 6,708 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic net income per common share—weighted-average shares |  |  | 22,446,557 |  |  |  | 22,346,112 |  |  |  | 22,477,974 |  |  |  | 22,373,731 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stocks |  |  | 916,666 |  |  |  | 917,119 |  |  |  | 916,666 |  |  |  | 916,666 |
Stock options |  |  | 223,352 |  |  |  | 264,965 |  |  |  | 202,645 |  |  |  | 261,341 |
Dilutive potential common shares |  |  | 1,140,018 |  |  |  | 1,182,084 |  |  |  | 1,119,311 |  |  |  | 1,178,007 |
Denominator for diluted net income per common share—adjusted weighted-average shares and assumed conversions |  |  | 23,586,575 |  |  |  | 23,528,196 |  |  |  | 23,597,285 |  |  |  | 23,551,738 |
Basic net income per common share |  | $ | 0.77 |  |  | $ | 2.09 |  |  | $ | 0.46 |  |  | $ | 0.30 |
Diluted net income per common share |  | $ | 0.75 |  |  | $ | 2.00 |  |  | $ | 0.43 |  |  | $ | 0.28 |
The following weighted-average shares of securities were not included in the computation of diluted net income per common share as their effect would have been antidilutive:
|  | Nine Months Ended September 30, |  |  | Three Months Ended September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Stock options |  |  | 249,000 |  |  |  | 254,000 |  |  |  | 243,000 |  |  |  | 254,000 |

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