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SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2012
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS |
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS | SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS (In thousands)
Year Ended December 31, |  | Balance at beginning of period |  | Charged to costs and expenses, net of recoveries |  | Charged to other accounts (1) |  | Deductions (2) |  | Balance at end of period |
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2010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 16,453 |  |  | (2,762 | ) |  | 115 |  |  | (3,780 | ) | $ | 10,026 |
2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 10,026 |  |  | (2,052 | ) |  | (8 | ) |  | (3,741 | ) | $ | 4,225 |
2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 4,225 |  |  | 1,556 |  |  | 45 |  |  | (1,293 | ) | $ | 4,533 |
NOTES: (1) Represents the foreign currency translation due to the change in the Canadian dollar to U.S. dollar exchange rate during the period. (2) Accounts receivable balances written off during the period, net of recoveries.

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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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