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Income Taxes (Notes)
 6 Months Ended
Jun. 30, 2013
Income Tax Contingency [Line Items]  
Income Tax Disclosure [Text Block]
INCOME TAXES:
In first half 2013, our effective tax rate was approximately 51.9% based on the statutory federal tax rate net of discrete federal and state taxes. During first half 2012, our effective tax rate was approximately 35.1% based on the statutory federal tax rate net of discrete federal and foreign taxes. The increase in the effective tax rate resulted from a discrete first quarter 2013 reversal of a valuation allowance against certain deferred tax assets and the impact of additional forecasted state tax expense on the annualized effective tax rate in 2013.
During first half 2013 and 2012, we paid approximately $2.6 million and $1.3 million, respectively, of foreign source withholding tax. We previously accrued approximately $1.9 million of the first half 2013 foreign source withholding payments and established a corresponding deferred tax asset representing the associated foreign tax credit that we expect to utilize to offset future U.S. federal income taxes.