Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	11 Months Ended	12 Months Ended		11 Months Ended	12 Months Ended		1 Months Ended
	Dec. 31, 2010 Successor Company Allowance for Doubtful Accounts	Dec. 31, 2012 Successor Company Allowance for Doubtful Accounts	Dec. 31, 2011 Successor Company Allowance for Doubtful Accounts	Dec. 31, 2010 Successor Company Deferred Income Tax Asset Valuation Allowance	Dec. 31, 2012 Successor Company Deferred Income Tax Asset Valuation Allowance	Dec. 31, 2011 Successor Company Deferred Income Tax Asset Valuation Allowance	Jan. 31, 2010 Predecessor Company Allowance for Doubtful Accounts	Jan. 31, 2010 Predecessor Company Deferred Income Tax Asset Valuation Allowance
Movement in Valuation Allowances and Reserves
Balance at beginning of period	$ 0	$ 53,696	$ 75,891	$ 7,876	$ 157,171	$ 97,642	$ 54,612	$ 1,531,905
Net additions charged to revenue and expense	16,364	32,602	52,296	89,766	(33,385)	59,529	7,822	0
Net changes to other balance sheet accounts	119,230	(7,262)	16,218	0	0	0	(54,591)	0
Write-offs and other deductions	(59,703)	(47,266)	(90,709)	0	0	0	(7,843)	(1,524,029)
Balance at end of period	$ 75,891	$ 31,770	$ 53,696	$ 97,642	$ 123,786	$ 157,171	$ 0	$ 7,876

DEX ONE Corp 10-K