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Income Taxes (Tables) | 3 Months Ended
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Mar. 31, 2013
Income Tax Disclosure [Abstract] |
Reconciliation of effective tax rate to the U.S. federal statutory tax rate | A reconciliation of the effective tax rate to the U.S. federal statutory tax rate is as follows:
|  | Three months ended March 31,
|  | 2013 |  | 2012
Federal statutory tax rate |  | 35.0 |  | % |  | 35.0 |  | %
State income taxes, net of federal benefit |  | 2.6 |  |  |  | 3.0 |  |
Change in valuation allowance |  | (0.1 | ) |  |  | (8.9 | ) |
Warrant liability fair value adjustment |  | — |  |  |  | 3.1 |  |
Domestic production activities deduction |  | (2.4 | ) |  |  | (2.1 | ) |
Other |  | 0.2 |  |  |  | 0.9 |  |
Effective income tax rate |  | 35.3 |  | % |  | 31.0 |  | %

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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