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Schedule II - Consolidated Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Allowance For Doubtful Accounts And Sales Allowances [Member] |  |  |
Valuation and Qualifying Accounts Roll Forward] |  |  |
Balance at beginning of year | $ 10,349 | $ 11,187 | $ 12,658
Additions charged to costs and expenses | 2,816 | 1,558 | 2,762
Deductions | (2,842) | (2,900) | (4,874)
Other | 313 | 504 | 641
Balance at end of year | 10,636 | 10,349 | 11,187
Reserve for inventory obsolescence [Member] |  |  |
Valuation and Qualifying Accounts Roll Forward] |  |  |
Balance at beginning of year | 32,516 | 29,037 | 30,108
Additions charged to costs and expenses | 11,407 | 12,905 | 8,789
Deductions | (8,848) | (9,125) | (10,508)
Other | 149 | (301) | 648
Balance at end of year | $ 35,224 | $ 32,516 | $ 29,037

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- Definition Total of 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 established to represent expected future costs + References Reference 1: 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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- Definition Total of 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 established to represent expected future costs, charged to costs and expenses. + References Reference 1: 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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- Definition Total of 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 established to represent expected future costs, charged to accounts other than costs and expenses in a given period + References Reference 1: 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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- Definition Total of the deductions 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 established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: 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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