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Income Taxes (Schedule of Components of Income Tax Expense) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Income Taxes [Abstract]    
Income tax based on income from continuing operations, at estimated tax rates of 35% and 34%, respectively $ 6,353 $ 6,038
Income tax before discrete items 6,353 6,038
Provision for/resolution of tax audits and contingencies, net 880   
Adjustments to prior period tax liabilities 224 210
Total income tax expense $ 7,457 $ 6,248
Estimated tax rate 35.00% 34.00%