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Schedule II Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Allowance for Doubtful Accounts and Returns |  |  |  |  |  |
Valuation and Qualifying Accounts Disclosure |  |  |  |  |  |
Balance at beginning of year | $ 4,829 |  | $ 4,311 |  | $ 5,077 |
Charged to costs and expenses | 1,427 |  | 1,888 |  | 1,403 |
Charged to other accounts | 35 | [1] | (91) | [1] | (200) | [1]
Deductions | (1,892) | [2] | (1,279) | [2] | (1,969) | [2]
Balance at end of year | 4,399 |  | 4,829 |  | 4,311 |
Inventory Reserves |  |  |  |  |  |
Valuation and Qualifying Accounts Disclosure |  |  |  |  |  |
Balance at beginning of year | 4,173 |  | 3,693 |  | 3,997 |
Charged to costs and expenses | 2,178 |  | 4,212 |  | 3,462 |
Charged to other accounts | (2) | [1] | (102) | [1] | (263) | [1]
Deductions | (2,625) | [3] | (3,630) | [3] | (3,503) | [3]
Balance at end of year | 3,724 |  | 4,173 |  | 3,693 |
Valuation Allowance of Deferred Tax Assets |  |  |  |  |  |
Valuation and Qualifying Accounts Disclosure |  |  |  |  |  |
Balance at beginning of year | 3,229 |  | 9,170 |  | 9,131 |
Charged to costs and expenses | 687 |  | 0 |  | 0 |
Charged to other accounts | 803 | [4] | (5,941) | [4] | 39 | [4]
Balance at end of year | $ 4,719 |  | $ 3,229 |  | $ 9,170 |
[1] | Primarily includes impact from foreign currency fluctuations.
[2] | Includes accounts determined to be uncollectible and charged against reserves, net of collections on accounts previously charged against reserves.
[3] | Includes inventory identified as excess, slow moving or obsolete and charged against reserves.
[4] | Includes a valuation allowance decreased in 2011 due to results of operations and an intercompany transaction that had no impact on 2011 Net Earnings. Other years were primarily the impact from foreign currency fluctuations.

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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 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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- 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 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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- 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 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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- 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 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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