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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract] |
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS Years Ended December 31, 2014, 2013 and 2012
|  | Balance at Beginnning of Period |  | Charged to Costs and Expenses |  | Charged to Other Accounts |  | Deductions |  | Balance at End of Period |
|  | (In thousands) |
2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 27,134 |  |  | (802 | ) |  | (52 | ) |  | (2,735 | ) | $ | 23,545 |
Inventory reserve |  | $ | 6,801 |  |  | 43,076 |  |  | — |  |  | (4,736 | ) | $ | 45,141 |
Valuation allowance on deferred tax assets |  | $ | 1,547,441 |  |  | — |  |  | (9,934 | ) |  | — |  | $ | 1,537,507 |
2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 32,847 |  |  | (1,880 | ) |  | (294 | ) |  | (3,539 | ) | $ | 27,134 |
Inventory reserve |  | $ | 6,645 |  |  | 3,270 |  |  | (366 | ) |  | (2,748 | ) | $ | 6,801 |
Valuation allowance on deferred tax assets |  | $ | 1,520,852 |  |  | — |  |  | 26,589 |  |  | — |  | $ | 1,547,441 |
2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 41,703 |  |  | (5,979 | ) |  | 179 |  |  | (3,056 | ) | $ | 32,847 |
Inventory reserve |  | $ | 6,984 |  |  | (3,141 | ) |  | 9 |  |  | 2,793 |  | $ | 6,645 |
Valuation allowance on deferred tax assets |  | $ | 1,485,540 |  |  | — |  |  | 35,312 |  |  | — |  | $ | 1,520,852 |
We revised the 2013 inventory reserve amounts for "Charged to Costs and Expenses" and "Balance at End of Period" to correct an error, which management determined is not material. This revision has no impact on the financial statements and related footnote disclosures.

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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 FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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