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Income Taxes Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]      
Federal statutory rate $ 8,317 $ 5,960 $ 3,672
Federal statutory rate (as a percent) 34.00% 34.00% 34.00%
Effect of state income taxes, net of federal benefit 1,468 631 637
Effect of state income taxes, net of federal benefit (as a percent) 6.00% 3.60% 5.90%
Effect of non-deductible expenses and other, net (630) 1,297 464
Effectof non-deductible expenses and other, net (as a percent) (2.60%) 7.40% 4.30%
Change in valuation allowance 122 (928) (183)
Change in valuation allowance (as a percent) 0.50% (5.30%) (1.70%)
Income tax expense (benefit) $ 9,277 $ 6,960 $ 4,590
Income tax expense (benefit) (as a percent) 37.90% 39.70% 42.50%