v2.4.1.9

Litigation and Legal Proceedings (Details) (USD $) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2014
China, Yuan Renminbi | Huawei [Domain] |  |
Loss Contingencies [Line Items] |  |
Loss Contingency, Damages Sought, Value | $ 20,000,000 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_CurrencyAxis = currency_CNY / us-gaap_MajorCustomersAxis = idcc_HuaweiDomain |
China, Yuan Renminbi | ZTE [Domain] |  |
Loss Contingencies [Line Items] |  |
Loss Contingency, Damages Sought, Value |  | 20,000,000 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_CurrencyAxis = currency_CNY / us-gaap_MajorCustomersAxis = idcc_ZTEDomain
China, Yuan Renminbi | Arima China [Domain] |  |
Loss Contingencies [Line Items] |  |
Loss Contingency, Damages Sought, Value |  | 120,000,000 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_CurrencyAxis = currency_CNY / us-gaap_MajorCustomersAxis = idcc_ArimaChinaDomain
United States of America, Dollars | Huawei [Domain] |  |
Loss Contingencies [Line Items] |  |
Loss Contingency, Damages Sought, Value | 3,200,000.000 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_CurrencyAxis = currency_USD / us-gaap_MajorCustomersAxis = idcc_HuaweiDomain |
United States of America, Dollars | ZTE [Domain] |  |
Loss Contingencies [Line Items] |  |
Loss Contingency, Damages Sought, Value |  | 3,300,000 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_CurrencyAxis = currency_USD / us-gaap_MajorCustomersAxis = idcc_ZTEDomain
United States of America, Dollars | Arima [Domain] |  |
Loss Contingencies [Line Items] |  |
Loss Contingency, Damages Sought, Value |  | 3,150,000 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_CurrencyAxis = currency_USD / us-gaap_MajorCustomersAxis = idcc_ArimaDomain
United States of America, Dollars | Arima China [Domain] |  |
Loss Contingencies [Line Items] |  |
Loss Contingency, Damages Sought, Value |  | 19,500,000 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_CurrencyAxis = currency_USD / us-gaap_MajorCustomersAxis = idcc_ArimaChinaDomain
Taiwan, New Dollars | Arima [Domain] |  |
Loss Contingencies [Line Items] |  |
Loss Contingency, Damages Sought, Value |  | $ 100,000,000 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_CurrencyAxis = currency_TWD / us-gaap_MajorCustomersAxis = idcc_ArimaDomain

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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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