Income Taxes (Details) (USD $)	3 Months Ended
Income Taxes (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Benefit for income taxes	$ 1,065,000	$ 1,167,000
Effective Income Tax Rate	1.80%	2.10%
Statutory Income Tax Rate	35.00%	35.00%
Change in Deferred Tax Assets Valuation Allowance (monetary)	19,300,000
Change in Deferred Tax Assets Valuation Allowance (percent)	(31.90%)	(45.50%)
Debt RepurchasesTax Gain		69,800,000
Estimated Increase (Decrease) in Deferred Tax Assets		(27,200,000)
Changes in Valuation Allowance
Income Tax Expense (Benefit), Change		$ (25,600,000)

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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DEX ONE Corp 10-Q