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Goodwill and Other Identifiable Intangible Assets (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Patents [Line Items] |  |  |
Patents, weighted average useful life | 7 years |  |
Payments to acquire intangible assets | $ 25,061,000 | $ 178,260,000 | $ 14,680,000
Accrued patent acquisition related payments | 4,000,000 |  |
Accelerated amortization expense | 592,000 | 10,574,000 | 3,111,000
Accelerated amortization expense (termination) | 1,747,000 | 3,034,000 | 1,103,000
Impairment of Intangible Assets (Excluding Goodwill) | $ 4,619,000 |  |
Minimum [Member] |  |  |
Patents [Line Items] |  |  |
Patents, useful life | 1 year |  |
Acquired Finite Lived Intangible Asset, Useful Life | 3 years |  |
Maximum [Member] |  |  |
Patents [Line Items] |  |  |
Patents, useful life | 10 years |  |
Acquired Finite Lived Intangible Asset, Useful Life | 10 years |  |
Patents [Member] | Minimum [Member] |  |  |
Patents [Line Items] |  |  |
Patents, useful life | 1 year |  |
Patents [Member] | Maximum [Member] |  |  |
Patents [Line Items] |  |  |
Patents, useful life | 10 years |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + Details
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- Definition The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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