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Income Taxes (Details Textual) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011
Income Taxes (Textual) [Abstract] |  |  |  |  |
Provisions for income taxes | $ 3,857,000 | $ 4,433,000 | $ 27,110,000 | $ 33,582,000 |
Percentage of pre-tax income |  |  | 36.00% | 37.00% |
State NOL carryforwards | 2,600,000 |  | 2,600,000 |  | 700,000
State and Local Jurisdiction [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Remaining state tax NOL carryforwards |  |  |  |  | $ 8,000,000

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