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Income Taxes Income Tax (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Valuation Allowance [Line Items] |  |  |  |
Provision for income taxes | $ 10,928 | $ 8,586 | $ 25,587 | $ 10,188
Deferred tax asset valuation allowances |  |  | $ 0 | $ 9,291
Effective Income Tax Rate Reconciliation, Percent | 41.20% | 38.70% | 39.90% | 20.40%

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