v2.4.1.9
Consolidated Statements of Shareholders' Equity (USD $)
In Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Treasury Stock [Member]
Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2011 $ 471,682us-gaap_StockholdersEquity $ 691us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 573,950us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ 466,727us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ (439)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
$ (569,247)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Beginning balance Treasury Stock, Shares at Dec. 31, 2011           23,570us-gaap_TreasuryStockShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Beginning balance in Shares at Dec. 31, 2011   69,118us-gaap_CommonStockSharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 271,804us-gaap_ProfitLoss            
Noncontrolling Interest in Variable Interest Entity             0us-gaap_NoncontrollingInterestInVariableInterestEntity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
NET INCOME 271,804us-gaap_NetIncomeLoss     271,804us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
     
Other Comprehensive Income (Loss), Net of Tax 1,303us-gaap_OtherComprehensiveIncomeLossNetOfTax            
Proceeds from Noncontrolling Interests 0us-gaap_ProceedsFromMinorityShareholders            
Net Income (Loss) Attributable to Noncontrolling Interest 0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest            
Other-than-temporary impairment losses related to available for sale securities, net of income taxes of $65, $0, $0 0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities            
Total Comprehensive Income 273,107us-gaap_ComprehensiveIncomeNetOfTax            
Dividends   0us-gaap_Dividends
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(789)us-gaap_Dividends
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(79,296)us-gaap_Dividends
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
     
Exercise of Common Stock options, shares   132us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Exercise of Common Stock options (78,507)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised (2)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(2,109)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures   209us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Issuance of Restricted Common Stock, net value (2,111)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures (2)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(4,389)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Tax benefit from exercise of stock options (4,387)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation   898us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Amortization of unearned compensation 898us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue   6,495us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Share-based Compensation 6,495us-gaap_ShareBasedCompensation            
Treasury Stock, Shares, Acquired           4,839us-gaap_TreasuryStockSharesAcquired
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Convertible note hedge transactions, net of tax     6,495idcc_ConvertibleNoteHedgeTransactionsNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Issuance of Warrants during period     (152,694)us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Treasury Stock, Value, Acquired, Cost Method           (152,694)us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Ending balance at Dec. 31, 2012 518,705us-gaap_StockholdersEquity 695us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
579,852us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
659,235us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
864us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
(721,941)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Ending balance Treasury Stock, Shares at Dec. 31, 2012           28,409us-gaap_TreasuryStockShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Ending balance in Shares at Dec. 31, 2012   69,459us-gaap_CommonStockSharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 38,165us-gaap_ProfitLoss            
Noncontrolling Interest in Variable Interest Entity 5,170us-gaap_NoncontrollingInterestInVariableInterestEntity           5,170us-gaap_NoncontrollingInterestInVariableInterestEntity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
NET INCOME 35,683us-gaap_NetIncomeLoss            
Other Comprehensive Income (Loss), Net of Tax (878)us-gaap_OtherComprehensiveIncomeLossNetOfTax            
Proceeds from Noncontrolling Interests 7,652us-gaap_ProceedsFromMinorityShareholders           7,652us-gaap_ProceedsFromMinorityShareholders
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Net Income (Loss) Attributable to Noncontrolling Interest (2,482)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest           (2,482)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Other-than-temporary impairment losses related to available for sale securities, net of income taxes of $65, $0, $0 0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities            
Total Comprehensive Income 34,805us-gaap_ComprehensiveIncomeNetOfTax            
Dividends   0us-gaap_Dividends
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(297)us-gaap_Dividends
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
16,682us-gaap_Dividends
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
     
Exercise of Common Stock options, shares   49us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Exercise of Common Stock options (16,385)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised 0us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(1,032)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures   106us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Issuance of Restricted Common Stock, net value (1,032)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures (1)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(2,459)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Tax benefit from exercise of stock options (2,458)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation   815us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Amortization of unearned compensation 815us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue   15,940us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Share-based Compensation 15,940us-gaap_ShareBasedCompensation            
Treasury Stock, Shares, Acquired           917us-gaap_TreasuryStockSharesAcquired
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Deferred financing costs allocated to equity     2,848us-gaap_AdjustmentsToAdditionalPaidInCapitalOther
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Treasury Stock, Value, Acquired, Cost Method           (29,134)us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 533,820us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest            
Ending balance at Dec. 31, 2013 528,650us-gaap_StockholdersEquity 696us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
598,325us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
680,718us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
(14)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
(751,075)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Ending balance Treasury Stock, Shares at Dec. 31, 2013 29,326us-gaap_TreasuryStockShares         29,326us-gaap_TreasuryStockShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Ending balance in Shares at Dec. 31, 2013 69,614us-gaap_CommonStockSharesIssued 69,614us-gaap_CommonStockSharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 104,342us-gaap_ProfitLoss            
Noncontrolling Interest in Variable Interest Entity 7,349us-gaap_NoncontrollingInterestInVariableInterestEntity           7,349us-gaap_NoncontrollingInterestInVariableInterestEntity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
NET INCOME 101,420us-gaap_NetIncomeLoss            
Other Comprehensive Income (Loss), Net of Tax 12us-gaap_OtherComprehensiveIncomeLossNetOfTax            
Proceeds from Noncontrolling Interests 5,101us-gaap_ProceedsFromMinorityShareholders           5,101us-gaap_ProceedsFromMinorityShareholders
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Net Income (Loss) Attributable to Noncontrolling Interest (2,922)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest           (2,922)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Other-than-temporary impairment losses related to available for sale securities, net of income taxes of $65, $0, $0 120us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities            
Total Comprehensive Income 101,552us-gaap_ComprehensiveIncomeNetOfTax            
Dividends     (857)us-gaap_Dividends
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
28,010us-gaap_Dividends
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
     
Exercise of Common Stock options, shares 21us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised 21us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Exercise of Common Stock options (27,153)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised 0us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(402)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures   165us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Issuance of Restricted Common Stock, net value (402)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures (2)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(2,740)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Tax benefit from exercise of stock options (2,738)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation   (1,176)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Amortization of unearned compensation (1,176)us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue   18,494us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
       
Share-based Compensation 18,494us-gaap_ShareBasedCompensation            
Treasury Stock, Shares, Acquired           3,554us-gaap_TreasuryStockSharesAcquired
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Treasury Stock, Value, Acquired, Cost Method           (152,625)us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 475,677us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest            
Ending balance at Dec. 31, 2014 $ 468,328us-gaap_StockholdersEquity $ 698us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 614,162us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ 757,050us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 118us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
$ (903,700)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Ending balance Treasury Stock, Shares at Dec. 31, 2014 32,880us-gaap_TreasuryStockShares         32,880us-gaap_TreasuryStockShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Ending balance in Shares at Dec. 31, 2014 69,800us-gaap_CommonStockSharesIssued 69,800us-gaap_CommonStockSharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember