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Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Schedule Of Effective Incomes Taxes Rate Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax expense at U.S. statutory rates |  |  |  |  |  |  |  |  | $ 8,894 | $ 10,486 | $ 7,260
State tax expense, net of federal benefit |  |  |  |  |  |  |  |  | 1,192 | 1,356 | 1,116
Other, net |  |  |  |  |  |  |  |  | 105 | 42 | 69
Change in valuation allowance on loss carry forwards |  |  |  |  |  |  |  |  | (51) | (34) | (15)
Income Tax Benefit Continuing Operations |  |  |  |  |  |  |  |  | 10,140 | 11,850 | 8,430
Discontinued operations |  |  |  |  |  |  |  |  | 148 | (89) | (174)
Income tax provision | $ 2,230 | $ 2,820 | $ 3,130 | $ 1,812 | $ 3,489 | $ 3,227 | $ 3,438 | $ 1,785 | $ 9,992 | $ 11,939 | $ 8,604

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