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Business Combinations (2013 Acquisitions) (Details) (USD $)
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1 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | ||||||||
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Dec. 31, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2013
Xtera Communications, Inc. [Member]
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Sep. 13, 2013
Xtera Communications, Inc. [Member]
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Mar. 21, 2013
Coyote Point Systems, Inc. [Member]
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Dec. 31, 2013
Developed Technology [Member]
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Dec. 31, 2012
Developed Technology [Member]
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Mar. 21, 2013
Developed Technology [Member]
Coyote Point Systems, Inc. [Member]
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Sep. 30, 2013
Developed Technology [Member]
Coyote Point Systems, Inc. [Member]
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Dec. 31, 2013
Customer Relationships [Member]
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Mar. 21, 2013
Customer Relationships [Member]
Coyote Point Systems, Inc. [Member]
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Mar. 21, 2013
Payable after Eighteen Months from Acquisition Date [Member]
Coyote Point Systems, Inc. [Member]
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Mar. 21, 2013
Payable after Two Years from Acquisition Date [Member]
Coyote Point Systems, Inc. [Member]
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Mar. 21, 2013
In Process Research and Development [Member]
Coyote Point Systems, Inc. [Member]
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| Business Acquisition [Line Items] | |||||||||||||||
| Cash paid to acquire business | $ 1,700,000 | $ 6,000,000 | |||||||||||||
| Contingent consideration | 100,000 | 5,500,000 | 3,500,000 | 2,000,000 | |||||||||||
| Cash and cash equivalents | 206,000 | ||||||||||||||
| Other current assets | 501,000 | ||||||||||||||
| Finite-lived intangible assets | 1,500,000 | 2,800,000 | 2,300,000 | 500,000 | |||||||||||
| Indefinite-lived intangible assets | 2,600,000 | 2,600,000 | |||||||||||||
| Goodwill | 2,872,000 | 2,900,000 | 0 | 2,872,000 | |||||||||||
| Other assets | 88,000 | ||||||||||||||
| Total assets acquired | 9,067,000 | ||||||||||||||
| Current liabilities | 1,078,000 | ||||||||||||||
| Long-term liabilities | 2,004,000 | ||||||||||||||
| Total liabilities assumed | 3,082,000 | ||||||||||||||
| Total purchase price | 5,985,000 | ||||||||||||||
| Useful life of finite-lived intangible assets | 6 years | 6 years | |||||||||||||
| Amortizable life of purchased indentifiable intangible assets | 4 years 7 months 17 days | 2 years 11 months 23 days | 6 years | 6 years | |||||||||||
| Total consideration | 1,800,000 | ||||||||||||||
| Purchased tangible assets | 200,000 | ||||||||||||||
| Estimated contingent obligation | $ 100,000 | ||||||||||||||