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Income Per Common Share (Tables) | 6 Months Ended
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Jun. 30, 2012
Income Per Common Share [Abstract] |
Computation of basic and diluted net income per share | (Dollars in Thousands, Except Per Share Amounts)
|  | Six Months Ended June 30, |  |  | Three Months Ended June 30, |
| 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 40,336 |  |  | $ | 49,548 |  |  | $ | 26,033 |  |  | $ | 28,645 |
Dividends on Series B Preferred |  |  | (240 | ) |  |  | (240 | ) |  |  | — |  |  |  | — |
Dividends on Series D Preferred |  |  | (60 | ) |  |  | (60 | ) |  |  | — |  |  |  | — |
Dividends on Noncumulative Preferred |  |  | — |  |  |  | (5 | ) |  |  | — |  |  |  | — |
Total dividends on preferred stocks |  |  | (300 | ) |  |  | (305 | ) |  |  | — |  |  |  | — |
Numerator for basic net income per common share — net income applicable to common stock |  |  | 40,036 |  |  |  | 49,243 |  |  |  | 26,033 |  |  |  | 28,645 |
Dividends on preferred stocks assumed to be converted, if dilutive |  |  | 300 |  |  |  | 305 |  |  |  | — |  |  |  | — |
Interest expense including amortization of debt issuance costs, net of income taxes, on convertible debt assumed to be converted, if dilutive |  |  | — |  |  |  | 290 |  |  |  | — |  |  |  | 25 |
Numerator for diluted net income per common share |  | $ | 40,336 |  |  | $ | 49,838 |  |  | $ | 26,033 |  |  | $ | 28,670 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic net income per common share — weighted-average shares |  |  | 22,332,303 |  |  |  | 21,656,508 |  |  |  | 22,340,826 |  |  |  | 22,133,217 |
Effective of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stocks |  |  | 917,346 |  |  |  | 935,626 |  |  |  | 916,666 |  |  |  | 935,626 |
Stock options |  |  | 266,776 |  |  |  | 359,158 |  |  |  | 251,838 |  |  |  | 362,634 |
Convertible notes payable |  |  | — |  |  |  | 534,146 |  |  |  | — |  |  |  | 95,000 |
Dilutive potential common shares |  |  | 1,184,122 |  |  |  | 1,828,930 |  |  |  | 1,168,504 |  |  |  | 1,393,260 |
Denominator for diluted net income per common share — adjusted weighted-average shares and assumed conversions |  |  | 23,516,425 |  |  |  | 23,485,438 |  |  |  | 23,509,330 |  |  |  | 23,526,477 |
Basic net income per common share |  | $ | 1.79 |  |  | $ | 2.27 |  |  | $ | 1.17 |  |  | $ | 1.29 |
Diluted net income per common share |  | $ | 1.72 |  |  | $ | 2.12 |  |  | $ | 1.11 |  |  | $ | 1.22 |
Antidilutive securities excluded from computation of earning per share |
|  | Six Months Ended June 30, |  |  | Three Months Ended June 30, |
| 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Stock options |  |  | 254,000 |  |  |  | — |  |  |  | 254,000 |  |  |  | — |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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