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Income Taxes (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Schedule Of Effective Income Taxes Rate Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax expense at U.S. statutory rates |  |  |  |  |  |  |  |  | $ 7,922 | $ 8,630 | $ 8,894
State tax expense, net of federal benefit |  |  |  |  |  |  |  |  | 1,115 | 1,249 | 1,192
Other, net |  |  |  |  |  |  |  |  | 603 | 178 | 105
Change in valuation allowance on loss carry forwards |  |  |  |  |  |  |  |  | 0 | (7) | (51)
Income Tax Benefit Continuing Operations |  |  |  |  |  |  |  |  | 9,640 | 10,050 | 10,140
Discontinued operations |  |  |  |  |  |  |  |  | 0 | 0 | 148
Income tax provision | $ 2,450 | $ 2,599 | $ 3,141 | $ 1,450 | $ 3,050 | $ 2,180 | $ 3,193 | $ 1,627 | $ 9,640 | $ 10,050 | $ 9,992

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