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Valuation And Qualifying Accounts (Detail) (Allowance for doubtful accounts receivable, USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Allowance for doubtful accounts receivable |  |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |
Balance at beginning of period | $ 5,934 |  | $ 6,225 |  | $ 6,738 |
Charged to costs and expenses | 774 |  | 596 |  | 463 |
Charged to other accounts |  |  |  |  |  |
Cumulative translation adjustment | 179 |  | (267) |  | (236) |
Other | (1,018) | [1] | (620) | [1] | (740) | [1]
Balance at end of period | $ 5,869 |  | $ 5,934 |  | $ 6,225 |
[1] | Uncollectible accounts written off, net of recoveries.

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- Definition Total of the adjustments in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability. + 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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