Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2013
Sep. 30, 2012
Income Tax Disclosure [Abstract]          
Effective Income Tax Rate, Continuing Operations 29.30% 35.70% 35.10% 37.50% 37.50%
Income Tax Expense (Benefit) $ 17,408,000 $ 9,766,000   $ 63,098,000 $ 48,284,000
Tax Adjustments, Settlements, and Unusual Provisions $ 3,700,000