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Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Summary of Significant Accounting Policies Additional (Textual) [Abstract] |  |  |
Promissory notes receivable | $ 2,706,000 | $ 3,876,000 |
Product warranty period | From six months to two years |  |
Amount revenue increased due to adoption of updated revenue recognition guidance |  | 3,008,000 |
Advertising costs | 2,157,000 | 1,402,000 | 856,000
Accumulated other comprehensive loss consisting of foreign currency translation adjustments, net of tax | 16,166,000 | 7,675,000 |
Net unrealized gain (loss) on available-for-sale investments, net of tax | 84,000 | (271,000) |
Maximum investment of the company in partnership | less than 5% |  |
Losses on currency swaps, net of gains on long-term intercompany loans, net of tax | $ 1,271,000 | $ 1,271,000 |
Building [Member] |  |  |
Property Plant And Equipment [Line Items] |  |  |
Useful lives, Maximum | 39 |  |
Computer hardware and software [Member] |  |  |
Property Plant And Equipment [Line Items] |  |  |
Useful lives, Maximum | 5 |  |
Useful lives, Minimum | 2 |  |
Manufacturing test equipment [Member] |  |  |
Property Plant And Equipment [Line Items] |  |  |
Useful lives, Maximum | 5 |  |
Useful lives, Minimum | 2 |  |
Furniture and Fixtures [Member] |  |  |
Property Plant And Equipment [Line Items] |  |  |
Useful lives, Maximum | 5 |  |
Useful lives, Minimum | 2 |  |
Building Improvements [Member] |  |  |
Property Plant And Equipment [Line Items] |  |  |
Useful lives, Maximum | 10 |  |
Distribution networks [Member] |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Useful Estimated Life, Intangible Assets, Maximum | 12 |  |
Useful Estimated Life, Intangible Assets, Minimum | 11 |  |
Customer contracts and relationships [Member] |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Useful Estimated Life, Intangible Assets, Maximum | 12 |  |
Useful Estimated Life, Intangible Assets, Minimum | 8 |  |
Completed Technologies and Other Intangible Assets [Member] |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Useful Estimated Life, Intangible Assets, Maximum | 8 |  |
Useful Estimated Life, Intangible Assets, Minimum | 3 |  |

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- Definition Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e653-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e637-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e681-108580 + Details
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- Definition Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32022-110900 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 17, 18, 19, 22, 23, 24, 25, 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e653-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e681-108580 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 52 -Paragraph 31 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 52 -Paragraph 12, 13 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e637-108580 + Details
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