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VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2012
Valuation and Qualifying Accounts |
VALUATION AND QUALIFYING ACCOUNTS | SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
|  | For the years ended December 31, 2012, 2011 and 2010 |
(in thousands) |  | Balance at Beginning of Period |  |  | Charged to Costs and Expenses |  |  | Net (Deductions) Recoveries |  |  | Balance at End of Period |
Year ended December 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 8,093 |  |  | $ | 1,784 |  |  | $ | (767 | ) (1) |  | $ | 9,110 |
Deferred tax asset valuation allowance |  | $ | 1,295 |  |  | $ | — |  |  | $ | (292 | ) (2) |  | $ | 1,003 |
Year ended December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 8,694 |  |  | $ | 2,868 |  |  | $ | (3,469 | ) (1) |  | $ | 8,093 |
Deferred tax asset valuation allowance |  | $ | 1,295 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,295 |
Year ended December 31, 2010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 3,210 |  |  | $ | 4,812 |  |  | $ | 672 | (1) |  | $ | 8,694 |
Deferred tax asset valuation allowance |  | $ | 1,550 |  |  | $ | — |  |  | $ | (255 | ) (2) |  | $ | 1,295 |
(1) | Net (deductions) recoveries in the allowance for doubtful accounts principally reflect the write-off of previously reserved accounts net of recoveries.
(2) | The valuation allowance for deferred tax assets is increased or decreased each year to reflect the state net operating losses that management believes will not be utilized before they expire.

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
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