InterDigital (IDCC) 10-Q 2 Aug 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jul. 29, 2016	Dec. 31, 2015
Entity Information [Line Items]
Entity Registrant Name	INTERDIGITAL, INC.
Allowance for doubtful accounts	$ 0		$ 0
Common stock, par value	$ 0.01		$ 0.01
Common stock, shares authorized	100,000,000		100,000,000
Common stock, shares issued	70,269,000		70,130,000
Common Stock, Shares, Outstanding	34,351,000		35,414,000
Preferred stock, par value	$ 0.10		$ 0.10
Preferred stock, shares authorized	14,399,000		14,399,000
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0
Treasury stock, 34,197 and 32,880 shares of common held at cost	35,918,000		32,880,000
Entity Central Index Key	1,405,495
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		34,252,083
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 601,388	$ 510,207
Short-term investments	212,510	423,501
Accounts receivable, less allowances of $1,750	104,181	53,868
Prepaid and other current assets	48,402	23,391
Total current assets	966,481	1,010,967
NON-CURRENT ASSETS:
PROPERTY AND EQUIPMENT, NET	11,583	12,148
PATENTS, NET	274,851	277,579
DEFERRED TAX ASSETS	201,572	160,572
OTHER NON-CURRENT ASSETS, NET	15,224	13,219
Total non-current assets	503,230	463,518
TOTAL ASSETS	1,469,711	1,474,485
CURRENT LIABILITIES:
Current portion of long-term debt	0	227,174
Accounts payable	19,013	19,002
Accrued compensation and related expenses	14,011	26,013
Taxes payable	11,810	1,405
Dividend payable	6,861	7,068
Other accrued expenses	10,340	13,082
Total current liabilities	371,375	399,973
LONG-TERM DEBT	265,728	259,595
NON-CURRENT LIABILITIES
LONG-TERM DEFERRED REVENUE	298,675	289,039
OTHER LONG-TERM LIABILITIES	10,775	3,983
TOTAL LIABILITIES	946,553	952,590
SHAREHOLDERS’ EQUITY:
Preferred Stock, $0.10 par value, 0 and 14,399 shares authorized 0 shares issued and outstanding	0	0
Common Stock, $0.01 par value, 100,000 shares authorized, 69,350 and 69,118 shares issued and 40,490 and 45,548 shares outstanding	703	701
Additional paid-in capital	670,893	663,073
Retained earnings	900,966	847,033
Accumulated other comprehensive income	210	(178)
Stockholders' Equity before Treasury Stock	1,572,772	1,510,629
Treasury stock, 25,957 and 23,570 shares of common held at cost	1,059,105	1,000,110
Total shareholders’ equity	513,667	510,519
Noncontrolling Interest in Variable Interest Entity	9,491	11,376
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	523,158	521,895
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 1,469,711	$ 1,474,485

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Patent licensing royalties	$ 74,900	$ 116,622	$ 181,854	$ 225,595
Technology solutions	1,015	1,929	1,825	3,334
REVENUES	75,915	118,551	183,679	228,929
OPERATING EXPENSES:
Patent administration and licensing	28,285	31,212	55,452	62,837
Development	14,609	18,326	34,878	36,317
Selling, general and administrative	9,938	10,435	21,910	19,953
Total Operating Expenses	52,832	59,973	112,240	119,107
Income from operations	23,083	58,578	71,439	109,822
OTHER INCOME:
Interest and investment income, net	(706)	(7,746)	(7,843)	(12,982)
Income before income taxes	22,377	50,832	63,596	96,840
INCOME TAX PROVISION	16,652	(18,877)	2,584	(36,553)
NET INCOME	39,994	32,602	68,065	61,667
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	39,029	31,955	66,180	60,287
Net Income (Loss) Attributable to Noncontrolling Interest	$ (965)	$ (647)	$ (1,885)	$ (1,380)
NET INCOME PER COMMON SHARE — BASIC	$ 1.16	$ 0.91	$ 1.96	$ 1.69
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — BASIC	34,499	36,022	34,772	36,486
NET INCOME PER COMMON SHARE — DILUTED	$ 1.14	$ 0.89	$ 1.94	$ 1.67
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — DILUTED	34,945	36,442	35,161	36,883
CASH DIVIDEND DECLARED PER COMMON SHARE	$ 0.20	$ 0.20	$ 0.40	$ 0.40

Condensed Consolidated Stateme4

Condensed Consolidated Statements of Other Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 39,029	$ 31,955	$ 66,180	$ 60,287
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	136	13	388	8
Other-than-temporary impairment losses related to available for sale securities, net of income taxes of $4, $0, $0, $0	8	0	0	0
Comprehensive (loss) income	39,173	31,968	66,568	60,295
Net Income (Loss) Attributable to Noncontrolling Interest	(965)	(647)	(1,885)	(1,380)
Total comprehensive income	$ 40,138	$ 32,615	$ 68,453	$ 61,675

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows (Unaudited) Statement - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Interest Paid	$ 5,245	$ 2,875
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	66,180	60,287
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25,942	23,423
Amortization of deferred financing fees and accretion of debt discount	8,959	9,300
Deferred revenue recognized	(69,423)	(86,022)
Increase (Decrease) in deferred revenue	282,170	90,776
Deferred income taxes	(41,000)	(14,547)
Tax benefit from share-based compensation	(9)	0
Share-based Compensation	10,580	6,299
Gain on disposal of assets	3,491	0
Other	(87)	631
Decrease (increase) in assets:
Receivables	(50,313)	(57,015)
Other current assets	(24,958)	(458)
Increase (decrease) in liabilities:
Accounts payable	(760)	(1,453)
Other accrued expenses	(13,272)	(18,582)
Accrued taxes payable	10,167	14,427
Net cash provided by operating activities	207,667	27,066
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term investments	(140,459)	(259,468)
Sales of short-term investments	351,865	134,286
Purchases of property and equipment	(2,266)	(1,329)
Capitalized patent costs	(16,368)	(16,191)
Acquisition of patents	(4,500)	(20,000)
Payments to Acquire Long-term Investments	(2,000)	0
Net cash used in investing activities	186,272	(162,702)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from noncontrolling interests	0	2,551
Payments on long-term debt	(230,000)	0
Proceeds from (Payments for) Other Financing Activities	0	4,500
Net proceeds from exercise of stock options	228	26
Proceeds from issuance of convertible senior notes	0	316,000
Payments for Hedge, Financing Activities	0	(59,376)
Proceeds from Issuance of Warrants	0	42,881
Payments of Debt Issuance Costs	0	(9,403)
Dividends paid	(13,991)	(14,665)
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities	0	2,163
Repurchase of common stock	(58,995)	(70,572)
Net cash provided (used) by financing activities	(302,758)	214,105
NET INCREASE IN CASH AND CASH EQUIVALENTS	91,181	78,469
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	510,207	428,567
CASH AND CASH EQUIVALENTS, END OF PERIOD	601,388	507,036
Income Taxes Paid	52,285	36,764
Dividend payable	6,861	7,243
Accrued capitalized patent costs and acquisition of patents	$ (359)	$ 421

Significant Accounting Policies

Significant Accounting Policies (Notes)	6 Months Ended
	Jun. 30, 2016
Basis of Presentation [Abstract]
Basis of Presentation and Significant Accounting Policies [Text Block]	BASIS OF PRESENTATION In the opinion of management, the accompanying unaudited, condensed consolidated financial statements contain all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the financial position of InterDigital, Inc. (individually and/or collectively with its subsidiaries referred to as “InterDigital,” the “Company,” “we,” “us” or “our,” unless otherwise indicated) as of June 30, 2016 , and the results of our operations for the three and six months ended June 30, 2016 and 2015 and our cash flows for the six months ended June 30, 2016 and 2015 . The accompanying unaudited, condensed consolidated financial statements have been prepared in accordance with the instructions for Form 10-Q and, accordingly, do not include all of the detailed schedules, information and notes necessary to state fairly the financial condition, results of operations and cash flows in conformity with generally accepted accounting principles (“GAAP”). The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP for year-end financial statements. Therefore, these financial statements should be read in conjunction with the financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015 (our “2015 Form 10-K ”) as filed with the Securities and Exchange Commission (“SEC”) on February 18, 2016. The results of operations for interim periods are not necessarily indicative of the results to be expected for the entire year. We have one reportable segment. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. Change in Accounting Policies There have been no material changes or updates in our existing accounting policies from the disclosures included in our 2015 Form 10-K except as stated below in "New Accounting Guidance." New Accounting Guidance Accounting Standards Update: Stock Compensation In March 2016, the Financial Accounting Standards Board ("FASB") issued ASU No. 2016-09, "Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting." ASU 2016-09 simplifies several aspects of the accounting for employee share-based payment transactions for both public and nonpublic entities, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. The guidance is effective for the interim and annual periods beginning on or after December 15, 2016. (Early adoption is permitted in any interim or annual period for which financial statements have not yet been issued or have not been made available for issuance. If early adoption is elected, all amendments in the ASU that apply must be adopted in the same period. In addition, if early adoption is elected in an interim period, any adjustments should be reflected as of the beginning of the annual period that includes that interim period.) We are currently evaluating the effect that adopting this guidance will have on the Company's financial position, results of operations or cash flows. Accounting Standards Update: Consolidation In February 2015, the FASB issued ASU No. 2015-2, “Consolidation (Topic 820): Amendments to the Consolidation Analysis.” ASU 2015-2 provides a revised consolidation model for all reporting entities to use in evaluating whether they should consolidate certain legal entities. All legal entities will be subject to reevaluation under this revised consolidation model. The revised consolidation model, among other things, (i) modifies the evaluation of whether limited partnerships and similar legal entities are voting interest entities, or VIEs, (ii) eliminates the presumption that a general partner should consolidate a limited partnership and (iii) modifies the consolidation analysis of reporting entities that are involved with VIEs through fee arrangements and related party relationships. ASU 2015-2 is effective for fiscal years, and interim reporting periods within those fiscal years, beginning after December 15, 2015. The amended standard has not had any effect on the Company's financial position or results of operations. Accounting Standards Update: Revenue Recognition In May 2014, the FASB issued guidance on revenue from contracts with customers that will supersede most current revenue recognition guidance, including industry-specific guidance. On April 14, 2016, the FASB amended the guidance by issuing ASU 2016-10, "Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing." The underlying principle is that an entity will recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to receive in exchange for those goods or services. The guidance provides a five-step analysis of transactions to determine when and how revenue is recognized. Other major provisions include capitalization of certain contract costs, consideration of time value of money in the transaction price, and allowing estimates of variable consideration to be recognized before contingencies are resolved in certain circumstances. The guidance also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from an entity’s contracts with customers. The guidance is effective for the interim and annual periods beginning on or after December 15, 2017 (early adoption is permitted as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within those annual periods). The guidance permits the use of either a retrospective or cumulative effect transition method. We have not yet selected a transition method. We are currently evaluating the effect that adopting this guidance will have on the Company's financial position, results of operations or cash flows.

Significant Agreements Signific

Significant Agreements Significant Agreements (Notes)	6 Months Ended
	Jun. 30, 2016
Significant Agreements [Text Block]	2. SALE-LEASEBACK During second quarter 2015, we sold our facility in King of Prussia, Pennsylvania, to a third party and entered into a limited leaseback arrangement for a period not to exceed one year, for net consideration of $4.5 million . The $3.4 million gain related to the sale was recorded within Other Expense (Net) in our Consolidated Statements of Operations, and the assets sold were removed from Property and Equipment, at the completion of the lease term in second quarter 2016.

Income Taxes (Notes)

Income Taxes (Notes)	6 Months Ended
	Jun. 30, 2016
Income Tax Contingency [Line Items]
Income Tax Disclosure [Text Block]	3. INCOME TAXES In first half 2016 , our effective tax rate was a benefit of 4.1% as compared to a provision of 37.7% during first half 2015 , based on the statutory federal tax rate net of discrete federal and state taxes. The decrease in our effective tax rate was primarily attributable to the impact of a $23.7 million discrete net benefit primarily related to domestic production activities refund claims for prior years. Additionally, our first half 2016 effective tax rate includes an estimated deduction for domestic production activities and an estimated U.S. federal research and development tax credit. The U.S. federal research and development tax credit received a permanent extension in December 2015. In first quarter 2016, we reversed a portion of our tax reserve upon completion of the Joint Committee on Taxation's review of the U.S. tax audit for the tax years 2010 through 2012. During first half 2016 and 2015 , we paid approximately $43.7 million and $24.0 million , respectively, of foreign source withholding tax. Additionally, as of June 30, 2016, included within our taxes payable and deferred tax asset balances was $11.8 million of foreign source withholding tax and the associated foreign tax credit that we expect to utilize to offset future U.S. federal income taxes. This balance is related to a receivable from foreign licensees.

Net Income Per Share (Notes)

Net Income Per Share (Notes)	6 Months Ended
	Jun. 30, 2016
NET INCOME PER SHARE: [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	For the Three Months Ended June 30, 2016 2015 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 39,994 $ 39,994 $ 32,602 $ 32,602 Denominator: Weighted-average shares outstanding: Basic 34,499 34,499 36,022 36,022 Dilutive effect of stock options, RSUs, convertible securities and warrants 446 420 Weighted-average shares outstanding: Diluted 34,945 36,442 Earnings Per Share: Net income: Basic $ 1.16 $ 1.16 $ 0.91 $ 0.91 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.02 ) (0.02 ) Net income: Diluted $ 1.14 $ 0.89 For the Six Months Ended June 30, 2016 2015 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 68,065 $ 68,065 $ 61,667 $ 61,667 Denominator: Weighted-average shares outstanding: Basic 34,772 34,772 36,486 36,486 Dilutive effect of stock options, RSUs, convertible securities and warrants 389 397 Weighted-average shares outstanding: Diluted 35,161 36,883 Earnings Per Share: Net income: Basic $ 1.96 $ 1.96 $ 1.69 $ 1.69 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.02 ) (0.02 ) Net income: Diluted $ 1.94 $ 1.67 NET INCOME PER SHARE Basic Earnings Per Share ("EPS") is calculated by dividing net income available to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if options or other securities with features that could result in the issuance of common stock were exercised or converted to common stock. The following tables reconcile the numerator and the denominator of the basic and diluted net income per share computation (in thousands, except for per share data): For the Three Months Ended June 30, 2016 2015 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 39,994 $ 39,994 $ 32,602 $ 32,602 Denominator: Weighted-average shares outstanding: Basic 34,499 34,499 36,022 36,022 Dilutive effect of stock options, RSUs, convertible securities and warrants 446 420 Weighted-average shares outstanding: Diluted 34,945 36,442 Earnings Per Share: Net income: Basic $ 1.16 $ 1.16 $ 0.91 $ 0.91 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.02 ) (0.02 ) Net income: Diluted $ 1.14 $ 0.89 For the Six Months Ended June 30, 2016 2015 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 68,065 $ 68,065 $ 61,667 $ 61,667 Denominator: Weighted-average shares outstanding: Basic 34,772 34,772 36,486 36,486 Dilutive effect of stock options, RSUs, convertible securities and warrants 389 397 Weighted-average shares outstanding: Diluted 35,161 36,883 Earnings Per Share: Net income: Basic $ 1.96 $ 1.96 $ 1.69 $ 1.69 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.02 ) (0.02 ) Net income: Diluted $ 1.94 $ 1.67 Certain shares of common stock issuable upon the exercise or conversion of certain securities have been excluded from our computation of earnings per share because the strike price or conversion rate, as applicable, of such securities was less than the average market price of our common stock for second quarter 2016 and second quarter 2015, as applicable, and, as a result, the effect of such exercise or conversion would have been anti-dilutive. Set forth below are the securities and the weighted average number of shares of common stock underlying such securities that were excluded from our computation of earnings per share for the periods presented (in thousands): For the Three Months Ended June 30, For the Six Months Ended June 30, 2016 2015 2016 2015 Restricted stock units and stock options 142 94 159 58 Convertible securities 4,366 4,366 6,068 6,803 Warrants 8,455 8,496 8,502 6,808 Total 12,963 12,956 14,729 13,669

Litigation and Legal Proceeding

Litigation and Legal Proceedings (Notes)	6 Months Ended
	Jun. 30, 2016
LITIGATION AND LEGAL PROCEEDINGS [Abstract]
Legal Matters and Contingencies [Text Block]	5. LITIGATION AND LEGAL PROCEEDINGS ARBITRATIONS AND COURT PROCEEDINGS (OTHER THAN DE DISTRICT COURT ACTIONS RELATED TO USITC PROCEEDINGS) Huawei Arbitration On December 23, 2013, InterDigital and Huawei agreed to engage in an expedited binding arbitration to resolve their licensing disputes. Pursuant to their agreement, on April 9, 2014, InterDigital and Huawei initiated an arbitration with the International Court of Arbitration of the International Chamber of Commerce (ICC) jointly seeking a determination by an arbitral tribunal of FRAND royalty terms and conditions to be included in a binding worldwide patent license agreement to take effect upon issuance of the arbitration award. An arbitration hearing was held on January 12-16, 2015. On May 26, 2015, the panel convened by the ICC delivered a confidential partial award. The panel convened by the ICC delivered a confidential final award dated July 14, 2015. On June 9, 2015, InterDigital filed a petition in the United States District Court for the Southern District of New York (the “New York District Court”) for an order confirming the arbitration award (the “New York Proceeding”). On the same day, Huawei filed an action in the Paris Court of Appeal requesting annulment of the arbitration award (the “Paris Proceeding”). On July 24, 2015, Huawei opposed InterDigital’s petition in the New York Proceeding and filed a motion to stay the New York Proceeding pending the Paris Proceeding. On August 14, 2015, InterDigital amended its petition in the New York Proceeding to take into account the issuance of the arbitration panel’s final award. A hearing in the New York Proceeding was held on February 16, 2016. On February 17, 2016, the judge notified the parties that he had rendered a decision on Huawei’s motion to stay the New York Proceeding, finding that the New York Proceeding should be stayed pending the Paris Proceeding, subject to a requirement that Huawei post suitable security, pursuant to Article VI of the New York Convention, in the amount of the final award, together with interest. The stay is subject to revision should circumstances change, and InterDigital can renew its petition for an order confirming the award following the outcome of the Paris Proceeding. On March 28, 2016, the New York District Court issued an order setting the amount of Huawei’s security. Huawei filed its brief seeking annulment in the Paris Proceeding on July 24, 2015. A hearing in the Paris Proceeding was held on March 8, 2016. On April 12, 2016, the Paris Court of Appeal denied Huawei’s request to annul the arbitration award. Shortly thereafter, Huawei indicated to InterDigital that it was considering an appeal of the Paris Court of Appeal decision to the highest court in France. On April 26, 2016, the parties submitted a proposed order to the New York District Court, which was entered by the court that same day, notifying the court of their agreements regarding payments under the partial and final arbitration awards and the status of the New York Proceeding. As it considers and pursues an appeal of the Paris Court of Appeal decision, Huawei agreed to make payments, without prejudice to its right to a further appeal, of amounts then outstanding and amounts that become due under the arbitration awards (including the resulting license agreement). In addition, InterDigital agreed not to seek to lift the stay in the New York Proceeding pending receipt of all such payments and pending any further appeal that Huawei has the right to pursue to the courts of France, and not to require Huawei to post security. On May 5, 2016, we received notice from the French Cour de Cassation, the highest court in France, that Huawei had filed on April 27, 2016 an appeal of the April 12, 2016 Paris Court of Appeal decision with the French Cour de Cassation. This appeal is currently pending. Huawei is in compliance with its obligations under the New York District Court’s order, including by making the requisite payments under the arbitration awards. Huawei made the first payments in second quarter 2016. We will recognize the related revenue in the period in which all criteria for revenue recognition have been met. Huawei China Proceedings On February 21, 2012, InterDigital was served with two complaints filed by Huawei Technologies Co., Ltd. in the Shenzhen Intermediate People's Court in China on December 5, 2011. The first complaint named as defendants InterDigital, Inc. and its wholly owned subsidiaries InterDigital Technology Corporation and InterDigital Communications, LLC (now InterDigital Communications, Inc.), and alleged that InterDigital had abused its dominant market position in the market for the licensing of essential patents owned by InterDigital by engaging in allegedly unlawful practices, including differentiated pricing, tying and refusal to deal. The second complaint named as defendants the Company's wholly owned subsidiaries InterDigital Technology Corporation, InterDigital Communications, LLC (now InterDigital Communications, Inc.), InterDigital Patent Holdings, Inc. and IPR Licensing, Inc. and alleged that InterDigital had failed to negotiate on FRAND terms with Huawei. Huawei asked the court to determine the FRAND rate for licensing essential Chinese patents to Huawei and also sought compensation for its costs associated with this matter. On February 4, 2013, the Shenzhen Intermediate People's Court issued rulings in the two proceedings. With respect to the first complaint, the court decided that InterDigital had violated the Chinese Anti-Monopoly Law by (i) making proposals for royalties from Huawei that the court believed were excessive, (ii) tying the licensing of essential patents to the licensing of non-essential patents, (iii) requesting as part of its licensing proposals that Huawei provide a grant-back of certain patent rights to InterDigital and (iv) commencing a USITC action against Huawei while still in discussions with Huawei for a license. Based on these findings, the court ordered InterDigital to cease the alleged excessive pricing and alleged improper bundling of InterDigital's Chinese essential and non-essential patents, and to pay Huawei 20.0 million RMB (approximately $3.2 million) in damages related to attorneys’ fees and other charges, without disclosing a factual basis for its determination of damages. The court dismissed Huawei's remaining allegations, including Huawei's claim that InterDigital improperly sought a worldwide license and improperly sought to bundle the licensing of essential patents on multiple generations of technologies. With respect to the second complaint, the court determined that, despite the fact that the FRAND requirement originates from ETSI's Intellectual Property Rights policy, which refers to French law, InterDigital's license offers to Huawei should be evaluated under Chinese law. Under Chinese law, the court concluded that the offers did not comply with FRAND. The court further ruled that the royalties to be paid by Huawei for InterDigital's 2G, 3G and 4G essential Chinese patents under Chinese law should not exceed 0.019% of the actual sales price of each Huawei product. On March 11, 2013, InterDigital filed notices of appeal with respect to the judgments in both proceedings, seeking reversal of the court’s February 4, 2013 rulings. On October 16, 2013, the Guangdong Province High Court issued a ruling affirming the ruling of the Shenzhen Intermediate People's Court in the second proceeding, and on October 21, 2013, issued a ruling affirming the ruling of the Shenzhen Intermediate People's Court in the first proceeding. InterDigital believes that the decisions are seriously flawed both legally and factually. For instance, in determining a purported FRAND rate, the Chinese courts applied an incorrect economic analysis by evaluating InterDigital’s lump-sum patent license agreement with Apple in hindsight to posit a running royalty rate. Indeed, the ALJ in USITC Inv. No. 337-TA-800 rejected that type of improper analysis. Moreover, the Chinese courts had an incomplete record and applied incorrect facts, including with respect to InterDigital’s now-expired license agreement with Apple, which had been found in an arbitration between InterDigital and Apple to be limited in scope. On April 14, 2014, InterDigital filed a petition for retrial of the second proceeding with the Chinese Supreme People’s Court (“SPC”), seeking dismissal of the judgment or at least a higher, market-based royalty rate for a license to InterDigital’s Chinese standards-essential patents (“SEPs”). The petition for retrial argues, for example, that (1) the lower court improperly determined a Chinese FRAND running royalty rate by using as a benchmark the Apple lump sum fixed payment license agreement, and looking in hindsight at the unexpectedly successful sales of Apple iPhones to construct an artificial running royalty rate that neither InterDigital nor Apple could have intended and that would have varied significantly depending on the relative success or failure in hindsight of Apple iPhone sales; (2) the Apple license agreement was also an inappropriate benchmark because its scope of product coverage was significantly limited as compared to the license that the court was considering for Huawei, particularly when there are other more comparable license agreements; and (3) if the appropriate benchmarks had been used, and the court had considered the range of royalties offered by other similarly situated SEP holders in the wireless telecommunications industry, the court would have determined a FRAND royalty that was substantially higher than 0.019%, and would have found, consistent with findings of the ALJ’s initial determination in the USITC 337-TA-800 proceeding, that there was no proof that InterDigital’s offers to Huawei violated its FRAND commitments. The SPC held a hearing on October 31, 2014, regarding whether to grant a retrial and requested that both parties provide additional information regarding the facts and legal theories underlying the case. The SPC convened a second hearing on April 1, 2015 regarding whether to grant a retrial. If the retrial is granted, the SPC will likely schedule one or more additional hearings before it issues a decision on the merits of the case. ZTE China Proceedings On July 10 and 11, 2014, InterDigital was served with two complaints filed by ZTE Corporation in the Shenzhen Intermediate People's Court in China on April 3, 2014. The first complaint names as defendants the Company's wholly owned subsidiaries InterDigital Technology Corporation, InterDigital Communications, Inc., InterDigital Patent Holdings, Inc. and IPR Licensing, Inc. This complaint alleges that InterDigital has failed to comply with its FRAND obligations for the licensing of its Chinese standards-essential patents. ZTE is asking the court to determine the FRAND rate for licensing InterDigital’s standards-essential Chinese patents to ZTE and also seeks compensation for its litigation costs associated with this matter. The second complaint names as defendants InterDigital, Inc. and its wholly owned subsidiaries InterDigital Technology Corporation and InterDigital Communications, Inc. This complaint alleges that InterDigital has a dominant market position in China and the United States in the market for the licensing of essential patents owned by InterDigital, and abused its dominant market position in violation of the Chinese Anti-Monopoly Law by engaging in allegedly unlawful practices, including excessively high pricing, tying, discriminatory treatment, and imposing unreasonable trading conditions. ZTE seeks relief in the amount of 20.0 million RMB (approximately $3.0 million based on the exchange rate as of June 30, 2016), an order requiring InterDigital to cease the allegedly unlawful conduct and compensation for its litigation costs associated with this matter. On August 7, 2014, InterDigital filed petitions challenging the jurisdiction of the Shenzhen Intermediate People's Court to hear the actions. On August 28, 2014, the court denied InterDigital’s jurisdictional challenge with respect to the anti-monopoly law case. InterDigital filed an appeal of this decision on September 26, 2014. On September 28, 2014, the court denied InterDigital’s jurisdictional challenge with respect to the FRAND case, and InterDigital filed an appeal of that decision on October 27, 2014. On December 18, 2014, the Guangdong High Court issued decisions on both appeals upholding the Shenzhen Intermediate Court’s decisions that it had jurisdiction to hear these cases. On February 10, 2015, InterDigital filed a petition for retrial with the Supreme People’s Court regarding its jurisdictional challenges to both cases. The Shenzhen Court held hearings on the anti-monopoly law case on May 11, 13, 15 and 18, 2015. At the May hearings, ZTE withdrew its claims alleging discriminatory treatment and the imposition of unfair trading conditions and increased its damages claim to 99.8 million RMB (approximately $15.0 million based on the exchange rate as of June 30, 2016). The Shenzhen Court held hearings in the FRAND case on July 29-31, 2015 and held a second hearing on the anti-monopoly law case on October 12, 2015. It is possible that the court may schedule further hearings in these cases before issuing its decisions. The Company has not recorded any accrual at June 30, 2016 for contingent losses associated with these matters based on its belief that losses, while reasonably possible, are not probable in accordance with accounting guidance. Pegatron Actions In first quarter 2015, we learned that on or about February 3, 2015, Pegatron Corporation (“Pegatron”), one of our licensees, filed a civil suit in Taiwan Intellectual Property Court against InterDigital, Inc. and certain of its subsidiaries alleging breach of the Taiwan Fair Trade Act (the “Pegatron Taiwan Action”). On May 26, 2015, InterDigital, Inc. received a copy of the civil complaint filed by Pegatron in the Taiwan Intellectual Property Court. The complaint named as defendants InterDigital, Inc. as well as InterDigital’s wholly owned subsidiaries InterDigital Technology Corporation and IPR Licensing, Inc. (together, for purposes of this discussion, “InterDigital”). The complaint alleged that InterDigital abused its market power by improperly setting, maintaining or changing the royalties Pegatron is required to pay under their 2008 patent license agreement (the “Pegatron PLA”), and engaging in unreasonable discriminatory treatment and other unfair competition activities in violation of the Taiwan Fair Trade Act. The complaint sought minimum damages in the amount of approximately $52 million, which amount could be expanded during the litigation, and that the court order multiple damages based on its claim that the alleged conduct was intentional. The complaint also sought an order requiring InterDigital to cease enforcing the royalty provisions of the Pegatron PLA, as well as all other conduct that allegedly violates the Fair Trade Act. On June 5, 2015 InterDigital filed an Arbitration Demand with the American Arbitration Association’s International Centre for Dispute Resolution (“ICDR”) seeking declaratory relief denying all of the claims in Pegatron’s Taiwan Action and for breach of contract. On or about June 10, 2015, InterDigital filed a complaint in the United States District Court for the Northern District of California, San Jose Division (the “CA Northern District Court”) seeking a Temporary Restraining Order, Preliminary Injunction, and Permanent Anti-suit Injunction against Pegatron prohibiting Pegatron from prosecuting the Pegatron Taiwan Action. The complaint also seeks specific performance by Pegatron of the dispute resolution procedures set forth in the Pegatron PLA and compelling arbitration of the disputes in the Pegatron Taiwan Action. On June 29, 2015, the court granted InterDigital’s motion for a temporary restraining order and preliminary injunction requiring Pegatron take immediate steps to dismiss the Taiwan Action without prejudice. On July 1, 2015, InterDigital was informed that Pegatron had withdrawn its complaint in the Taiwan Intellectual Property Court and that the case had been dismissed without prejudice. On August 3, 2015, Pegatron filed an answer and counterclaims to InterDigital’s CA Northern District Court complaint. Pegatron accused InterDigital of violating multiple sections of the Taiwan Fair Trade Act, violating Section Two of the Sherman Act, breaching ETSI, IEEE, and ITU contracts, promissory estoppel (pled in the alternative), violating Section 17200 of the California Business & Professions Code, and violating the Delaware Consumer Fraud Act. These counterclaims stem from Pegatron’s accusation that InterDigital violated FRAND obligations. As relief, Pegatron seeks a declaration regarding the appropriate FRAND terms and conditions for InterDigital’s “declared essential patents,” a declaration that InterDigital’s standard essential patents are unenforceable due to patent misuse, an order requiring InterDigital to grant Pegatron a license on FRAND terms, an order enjoining InterDigital’s alleged ongoing breaches of its FRAND commitments, and damages in the amount of allegedly excess non-FRAND royalties Pegatron has paid to InterDigital, plus interest and treble damages. On August 7, 2015, Pegatron responded to InterDigital’s arbitration demand, disputing the arbitrability of Pegatron’s claims. On September 24, 2015, InterDigital moved to compel arbitration and dismiss Pegatron’s counterclaims or, in the alternative, stay the counterclaims pending the parties’ arbitration. Pegatron’s opposition to this motion was filed on October 22, 2015, and InterDigital’s reply was filed on November 12, 2015. On January 20, 2016, the court granted InterDigital’s motion to compel arbitration of Pegatron’s counterclaims and to stay the counterclaims pending the arbitrators’ determination of their arbitrability. On January 27, 2016, the parties stipulated to stay all remaining aspects of the CA Northern District case pending such an arbitrability determination. On the same day, the court granted the stay and administratively closed the case. The arbitration remains pending. Microsoft Sherman Act Delaware Proceedings On August 20, 2015, Microsoft Mobile, Inc. and Microsoft Mobile Oy (collectively “Microsoft”) filed a complaint in the United States District Court for the District of Delaware (the “Delaware District Court”) against InterDigital, Inc., InterDigital Communications, Inc., InterDigital Technology Corporation, InterDigital Patent Holdings, Inc., InterDigital Holdings, Inc., and IPR Licensing, Inc. The complaint alleges that InterDigital has monopolized relevant markets for 3G and 4G cellular technology in violation of Section 2 of the Sherman Act. As relief, Microsoft seeks declaratory judgments that InterDigital has violated Section 2 of the Sherman Act, that “each of InterDigital’s U.S. patents declared by it to be Essential” to the 3G and 4G standards is unenforceable, and that all agreements InterDigital has entered into in furtherance of its alleged unlawful conduct are void. Microsoft also seeks an award of treble damages and the following injunctive relief: requiring InterDigital to grant Microsoft a non-confidential license to its U.S. standards essential patents (“SEPs”) on FRAND terms as determined by a court, requiring InterDigital to disclose to Microsoft the terms of its other SEP licenses, preventing InterDigital from enforcing any exclusion orders it might receive with respect to its SEPs, and requiring InterDigital to re-assign any declared SEPs that it has assigned to controlled entities. On November 4, 2015, InterDigital filed a motion to dismiss and to strike Microsoft’s complaint. A hearing on this motion was held on March 1, 2016, and on April 13, 2016, the Delaware District Court denied InterDigital’s motion. On April 27, 2016, InterDigital filed a motion with the Delaware District Court to certify questions addressed in the court’s April 13, 2016 decision for interlocutory appeal. The court denied InterDigital’s motion for certification of interlocutory appeal on June 13, 2016. On May 27, 2016, InterDigital filed its answer and counterclaims. InterDigital denied Microsoft’s claim that InterDigital violated Section 2 of the Sherman Act and asserted several defenses. InterDigital also filed two counterclaims for declaratory judgment: (i) that Microsoft’s Sherman Act claim is invalid and preempted as applied under the First Amendment of the U.S. Constitution, the Patent Clause of the U.S. Constitution, and Title 35 of the U.S. Code; and (ii) that Microsoft waived entitlement to benefit from FRAND commitments by InterDigital due to Microsoft’s reverse hold-up behavior. Microsoft filed an answer to InterDigital’s counterclaims on June 20, 2016. Sharp Arbitration On December 19, 2014, Sharp Corporation (“Sharp”) filed a demand for arbitration against the Company’s wholly owned subsidiary InterDigital Technology Corporation (“ITC”) with the American Arbitration Association’s International Center for Dispute Resolution. Sharp’s demand for arbitration is based on ITC’s alleged breach of the August 10, 2001 patent license agreement (as amended) (the “2001 PLA”) between Sharp and ITC. Sharp claims that ITC breached its FRAND commitments under the ETSI IPR policy, Section 6.1, by enforcing the 2001 PLA, thereby requiring Sharp to pay what it alleges to be excessive and discriminatory royalties. Sharp also claims that ITC breached the implied covenant of good faith and fair dealing in the 2001 PLA by charging what Sharp alleges are excessive and discriminatory royalties. Sharp further alleges that ITC should be promissorily estopped from charging allegedly excessive and discriminatory royalties, and that ITC should provide an accounting of overpayments resulting from ITC’s alleged failure to observe its FRAND commitments. Sharp is seeking (a) a declaration that ITC breached its FRAND commitments and breached the implied covenant of good faith and fair dealing, (b) calculation of new FRAND rates for the 2001 PLA, and (c) an order that ITC must return an amount to be determined for Sharp’s alleged overpayment under the 2001 PLA. According to recent submissions Sharp is seeking as damages a refund of a substantial majority of the royalties paid by Sharp under the 2001 PLA plus interest, resulting in an aggregate amount of damages of up to approximately $390 million. InterDigital and Sharp have agreed to certain binding terms to settle this dispute and are in the process of finalizing a settlement agreement. As a result, the evidentiary hearing that was scheduled for July 2016 has been adjourned and all other scheduled dates have been continued. The Company has not recorded any accrual at June 30, 2016 for contingent losses associated with this matter based on its belief that losses, while reasonably possible, are not probable in accordance with accounting guidance. REGULATORY PROCEEDINGS Investigation by Taiwan Fair Trade Commission On December 6, 2013, InterDigital received notice from the Taiwan Fair Trade Commission (“TFTC”) that the TFTC had initiated an investigation to examine alleged anti-competitive behavior under Taiwan’s Fair Trade Act (FTA). Companies found to violate the FTA may be ordered to cease and rectify the unlawful conduct, take other necessary corrective action, and/or pay an administrative fine. During second quarter 2016, InterDigital was informed by its local counsel that the staff of the TFTC has completed its investigation and has forwarded its recommendations to the Commission. InterDigital is fully cooperating with the TFTC’s investigation. Investigation by National Development and Reform Commission of China On September 23, 2013, counsel for InterDigital was informed by China’s National Development and Reform Commission (“NDRC”) that the NDRC had initiated a formal investigation into whether InterDigital has violated China’s Anti-Monopoly Law (“AML”) with respect to practices related to the licensing of InterDigital’s standards-essential patents to Chinese companies. Companies found to violate the AML may be subject to a cease and desist order, fines and disgorgement of any illegal gains. On March 3, 2014, the Company submitted to NDRC, pursuant to a procedure set out in the AML, a formal application for suspension of the investigation that included proposed commitments by the Company. On May 22, 2014, NDRC formally suspended its investigation of the Company based on the commitments proposed by the Company. The Company’s commitments with respect to the licensing of its patent portfolio for wireless mobile standards to Chinese manufacturers of cellular terminal units (“Chinese Manufacturers”) are as follows: 1. Whenever InterDigital engages with a Chinese Manufacturer to license InterDigital’s patent portfolio for 2G, 3G and 4G wireless mobile standards, InterDigital will offer such Chinese Manufacturer the option of taking a worldwide portfolio license of only its standards-essential wireless patents, and comply with F/RAND principles when negotiating and entering into such licensing agreements with Chinese Manufacturers. 2. As part of its licensing offer, InterDigital will not require that a Chinese Manufacturer agree to a royalty-free, reciprocal cross-license of such Chinese Manufacturer's similarly categorized standards-essential wireless patents. 3. Prior to commencing any action against a Chinese Manufacturer in which InterDigital may seek exclusionary or injunctive relief for the infringement of any of its wireless standards-essential patents, InterDigital will offer such Chinese Manufacturer the option to enter into expedited binding arbitration under fair and reasonable procedures to resolve the royalty rate and other terms of a worldwide license under InterDigital's wireless standards-essential patents. If the Chinese Manufacturer accepts InterDigital's binding arbitration offer or otherwise enters into an agreement with InterDigital on a binding arbitration mechanism, InterDigital will, in accordance with the terms of the arbitration agreement and patent license agreement, refrain from seeking exclusionary or injunctive relief against such company. The commitments contained in item 3 above will expire five years from the effective date of the suspension of the investigation, or May 22, 2019. USITC PROCEEDINGS AND RELATED DELAWARE DISTRICT COURT PROCEEDINGS Nokia and ZTE 2013 USITC Proceeding (337-TA-868) and Related Delaware District Court Proceedings USITC Proceeding (337-TA-868) On January 2, 2013, the Company’s wholly owned subsidiaries InterDigital Communications, Inc., InterDigital Technology Corporation, IPR Licensing, Inc. and InterDigital Holdings, Inc. filed a complaint with the United States International Trade Commission (the “USITC” or “Commission”) against Samsung Electronics Co., Ltd., Samsung Electronics America, Inc. and Samsung Telecommunications America, LLC, Nokia Corporation and Nokia Inc., Huawei Technologies Co., Ltd., Huawei Device USA, Inc. and FutureWei Technologies, Inc. d/b/a Huawei Technologies (USA) and ZTE Corporation and ZTE (USA) Inc. (collectively, the “337-TA-868 Respondents”), alleging violations of Section 337 of the Tariff Act of 1930 in that they engaged in unfair trade practices by selling for importation into the United States, importing into the United States and/or selling after importation into the United States certain 3G and 4G wireless devices (including WCDMA-, cdma2000- and LTE-capable mobile phones, USB sticks, mobile hotspots, laptop computers and tablets and components of such devices) that infringe one or more of up to seven of InterDigital’s U.S. patents. The complaint also extended to certain WCDMA and cdma2000 devices incorporating Wi-Fi functionality. InterDigital’s complaint with the USITC sought an exclusion order that would bar from entry into the United States infringing 3G or 4G wireless devices (and components), including LTE devices, that are imported by or on behalf of the 337-TA-868 Respondents, and also sought a cease-and-desist order to bar further sales of infringing products that have already been imported into the United States. Certain of the asserted patents were also asserted against Nokia, Huawei and ZTE in earlier pending USITC proceedings (including the Nokia, Huawei and ZTE 2011 USITC Proceeding (337-TA-800) and the Nokia 2007 USITC Proceeding (337-TA-613), as set forth below) and therefore were not asserted against those 337-TA-868 Respondents in this investigation. On December 23, 2013, InterDigital and Huawei reached a settlement agreement to enter into binding arbitration to resolve their global patent licensing disputes (see “Huawei Arbitration” above). Pursuant to the settlement agreement, InterDigital and Huawei moved to dismiss all litigation matters pending between the parties except the action filed by Huawei in China to set a fair, reasonable and non-discriminatory (“FRAND”) rate for the licensing of InterDigital’s Chinese standards-essential patents (discussed above under “Huawei China Proceedings”), the decision in which InterDigital is permitted to further appeal. As a result, effective February 12, 2014, the Huawei Respondents were terminated from the 337-TA-868 investigation. From February 10 to February 20, 2014, ALJ Essex presided over the evidentiary hearing in this investigation. The patents in issue in this investigation as of the hearing were U.S. Patent Nos. 7,190,966 (the “’966 patent”) and 7,286,847 (the “’847 patent”) asserted against ZTE and Samsung, and U.S. Patent No. 7,941,151 (the “’151 patent”) asserted against ZTE, Samsung and Nokia. On June 3, 2014, InterDigital and Samsung filed a joint motion to terminate the investigation as to Samsung on the basis of settlement. The ALJ granted the joint motion by initial determination issued on June 9, 2014, and the USITC determined not to review the initial determination on June 30, 2014. On June 13, 2014, the ALJ issued an Initial Determination (“ID”) in the 337-TA-868 investigation. In the ID, the ALJ found that no violation of Section 337 had occurred in connection with the importation of 3G/4G devices by ZTE or Nokia, on the basis that the accused devices do not infringe asserted claims 1-6, 8-9, 16-21 or 23-24 of the ’151 patent, claims 1, 3, 6, 8, 9, or 11 of the ’966 patent, or claims 3 or 5 of the ’847 patent. The ALJ also found that claim 16 of the ’151 patent was invalid as indefinite. Among other determinations, the ALJ further determined that InterDigital did not violate any FRAND obligations, a conclusion also reached by the ALJ in the 337-TA-800 investigation, and that Respondents have engaged in patent “hold out.” On June 30, 2014, InterDigital filed a Petition for Review with the USITC seeking review and reversal of certain of the ALJ’s conclusions in the ID. On the same day, Respondents filed a Conditional Petition for Review urging alternative grounds for affirmance of the ID’s finding that Section 337 was not violated and a Conditional Petition for Review with respect to FRAND issues. In June 2014, Microsoft Mobile Oy (“MMO”) was added as a respondent in the investigation. On August 14, 2014, the Commission determined to review in part the June 13, 2014 ID but terminated the investigation with a finding of no violation. On October 10, 2014, InterDigital filed a petition for review with the U.S. Court of Appeals for the Federal Circuit (the “Federal Circuit”), appealing certain of the adverse determinations in the Commission’s August 8, 2014 final determination including those related to the ’966 and ’847 patents. On June 2, 2015, InterDigital moved to voluntarily dismiss the Federal Circuit appeal, because, even if it were to prevail, it did not believe there would be sufficient time following the court’s decision and mandate for the USITC to complete its proceedings on remand such that the accused products would be excluded before the ’966 and ’847 patents expire in June 2016. The court granted the motion and dismissed the appeal on June 18, 2015. Related Delaware District Court Proceedings On January 2, 2013, the Company’s wholly owned subsidiaries InterDigital Communications, Inc., InterDigital Technology Corporation, IPR Licensing, Inc. and InterDigital Holdings, Inc. filed four related district court actions in the Delaware District Court against the 337-TA-868 Respondents. These complaints allege that each of the defendants infringes the same patents with respect to the same products alleged in the complain

Equity Transactions (Notes)

Equity Transactions (Notes)	6 Months Ended
	Jun. 30, 2016
EQUITY TRANSACTIONS: [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	6. EQUITY TRANSACTIONS Changes in shareholders’ equity for the six months ended June 30, 2016 and June 30, 2015 were as follows (in thousands): For the Six Months Ended June 30, 2016 2015 Balance beginning of period, December 31 $ 510,519 $ 468,328 Net income attributable to InterDigital, Inc. 68,065 61,667 Unrealized gain on investments, net 388 8 Cash dividends declared (13,784 ) (14,475 ) Repurchase of common stock (58,995 ) (70,572 ) Convertible note hedge transactions, net of tax — (38,594 ) Warrant transactions — 42,881 Equity component of the 2020 Notes, net of tax — 38,567 Deferred financing costs allocated to equity — (2,430 ) Exercise of common stock options 228 26 Taxes withheld upon restricted stock unit vestings (3,325 ) (9,557 ) Tax benefit from share-based compensation (9 ) 2,163 Share-based compensation 10,580 6,299 Total InterDigital, Inc. shareholders’ equity end of period $ 513,667 $ 484,311 Noncontrolling Interest Balance beginning of period, December 31 11,376 7,349 Proceeds from noncontrolling interests — 2,551 Net loss attributable to noncontrolling interest (1,885 ) (1,380 ) Noncontrolling interest 9,491 8,520 Total Equity end of period $ 523,158 $ 492,831 Repurchase of Common Stock In June 2014, our Board of Directors authorized a $300 million share repurchase program (the “2014 Repurchase Program”), and in June 2015, our Board of Directors authorized a $100 million increase to the 2014 Repurchase Program, bringing the total amount of the program to $400 million . The Company may repurchase shares under the 2014 Repurchase Program through open market purchases, pre-arranged trading plans or privately negotiated purchases. The table below sets forth the number of shares repurchased and the dollar value of shares repurchased under the 2014 Repurchase Program during 2016, 2015 and 2014, in thousands. 2014 Repurchase Program # of Shares Value 2016 1,202 $ 58,995 2015 1,836 96,410 2014 3,554 152,625 Total 6,592 $ 308,030 Dividends Cash dividends on outstanding common stock declared in 2016 and 2015 were as follows (in thousands, except per share data): 2016 Per Share Total Cumulative by Fiscal Year First quarter $ 0.20 $ 6,923 $ 6,923 Second quarter 0.20 6,861 13,784 $ 0.40 $ 13,784 2015 Per Share Total Cumulative by Fiscal Year First quarter $ 0.20 $ 7,232 $ 7,232 Second quarter 0.20 7,243 14,475 Third quarter 0.20 7,183 21,658 Fourth quarter 0.20 7,068 28,726 $ 0.80 $ 28,726 In June 2014, we announced that our Board of Directors had approved a 100% increase in the Company’s quarterly cash dividend, to $0.20 per share. We currently expect to continue to pay dividends comparable to our quarterly $0.20 per share cash dividend in the future; however, continued payment of cash dividends and changes in the Company's dividend policy will depend on the Company's earnings, financial condition, capital resources and capital requirements, alternative uses of capital, restrictions imposed by any existing debt, economic conditions and other factors considered relevant by our Board of Directors. Common Stock Warrants On March 29, 2011 and March 30, 2011, we sold warrants to acquire, subject to customary anti-dilution adjustments, approximately 3.5 million and approximately 0.5 million shares of our common stock, respectively. The warrants become exercisable and expire in daily tranches over an approximately two-month period that started June 15, 2016, and have a strike price of $63.18 per share. In consideration for the warrants issued on March 29, 2011 and March 30, 2011, we received $27.6 million and $4.1 million , respectively, on April 4, 2011. The market price of our common stock did not exceed the strike price of the warrants on any warrant expiration date in second quarter 2016; as a result, we were not required to issue any shares of common stock pursuant to these warrants during the quarter. On March 5 and March 9, 2015, we sold warrants to acquire, subject to customary anti-dilution adjustments, approximately 3.8 million and approximately 0.6 million shares of our common stock, respectively, at an initial strike price of approximately $88.46 per share. The warrants become exercisable and expire in daily tranches over a three and a half month period starting in June 2020. As consideration for the warrants issued on March 5 and March 9, 2015, we received approximately $37.3 million and approximately $5.6 million , respectively.

Concentration of Credit Risk an

Concentration of Credit Risk and Fair Value of Financial Assets and Liabilities (Notes)	6 Months Ended
	Jun. 30, 2016
CONCENTRATION OF CREDIT RISK AND FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES: [Abstract]
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]	7. CONCENTRATION OF CREDIT RISK AND FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES Concentration of Credit Risk and Fair Value of Financial Instruments Financial instruments that potentially subject us to concentration of credit risk consist primarily of cash equivalents, short-term investments, and accounts receivable. We place our cash equivalents and short-term investments only in highly rated financial instruments and in United States government instruments. Our accounts receivable are derived principally from patent license and technology solutions agreements. At both June 30, 2016 and December 31, 2015, four licensees comprised 97% of our net accounts receivable balance. We perform ongoing credit evaluations of our licensees, who generally include large, multinational, wireless telecommunications equipment manufacturers. We believe that the book values of our financial instruments approximate their fair values. Fair Value Measurements We use various valuation techniques and assumptions when measuring fair value of our assets and liabilities. We utilize market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. This guidance established a hierarchy that prioritizes fair value measurements based on the types of input used for the various valuation techniques (market approach, income approach and cost approach). The levels of the hierarchy are described below: Level 1 Inputs — Level 1 includes financial instruments for which quoted market prices for identical instruments are available in active markets. Level 2 Inputs — Level 2 includes financial instruments for which there are inputs other than quoted prices included within Level 1 that are observable for the instrument such as quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets with insufficient volume or infrequent transactions (less active markets) or model-driven valuations in which significant inputs are observable or can be derived principally from, or corroborated by, observable market data, including market interest rate curves, referenced credit spreads and pre-payment rates. Level 3 Inputs — Level 3 includes financial instruments for which fair value is derived from valuation techniques including pricing models and discounted cash flow models in which one or more significant inputs are unobservable, including the Company’s own assumptions. The pricing models incorporate transaction details such as contractual terms, maturity and, in certain instances, timing and amount of future cash flows, as well as assumptions related to liquidity and credit valuation adjustments of marketplace participants. Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of financial assets and financial liabilities and their placement within the fair value hierarchy. We use quoted market prices for similar assets to estimate the fair value of our Level 2 investments. Our financial assets are included within short-term investments on our condensed consolidated balance sheets, unless otherwise indicated. Our financial assets that are accounted for at fair value on a recurring basis are presented in the tables below as of June 30, 2016 and December 31, 2015 (in thousands): Fair Value as of June 30, 2016 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 570,753 $ — $ — $ 570,753 Commercial paper (b) — 47,021 — 47,021 U.S. government securities — 138,863 — 138,863 Corporate bonds, asset backed and other securities — 57,261 — 57,261 $ 570,753 $ 243,145 $ — $ 813,898 ______________________________ (a) Included within cash and cash equivalents. (b) Includes $30.6 million of commercial paper that is included within cash and cash equivalents. Fair Value as of December 31, 2015 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 333,671 $ — $ — $ 333,671 Commercial paper (b) — 377,347 — 377,347 U.S. government securities — 183,950 — 183,950 Corporate bonds, asset backed and other securities 183 38,557 — 38,740 $ 333,854 $ 599,854 $ — $ 933,708 ______________________________ (a) Included within cash and cash equivalents. (b) Includes $176.5 million of commercial paper that is included within cash and cash equivalents. The principal amount, carrying value and related estimated fair value of the Company's senior convertible debt reported in the Condensed Consolidated Balance Sheets as of June 30, 2016 and December 31, 2015 are as follows (in thousands): June 30, 2016 December 31, 2015 Principal Amount Carrying Value Fair Value Principal Amount Carrying Fair Value Total Long-Term Debt $ 316,000 $ 265,728 $ 328,839 $ 546,000 $ 486,769 $ 533,203 The aggregate fair value of the principal amount of the long-term debt (Level 2 Notes as defined in Note 8 “Long-Term Debt”) was calculated using inputs such as actual trade data, benchmark yields, broker/dealer quotes and other similar data, which were obtained from independent pricing vendors, quoted market prices or other sources.

Long-Term Debt (Notes)

Long-Term Debt (Notes)	6 Months Ended
	Jun. 30, 2016
Long-term Debt, Unclassified [Abstract]
Long-term Debt [Text Block]	LONG-TERM DEBT 2016 Senior Convertible Notes, and related Note Hedge and Warrant Transactions In April 2011, we issued $230.0 million in aggregate principal amount of 2.50% Senior Convertible Notes due 2016 (the “2016 Notes”), which matured and were repaid in full on March 15, 2016. In connection with the offering of the 2016 Notes, on March 29 and March 30, 2011, we entered into convertible note hedge transactions that covered, subject to customary anti-dilution adjustments, approximately 3.5 million and approximately 0.5 million shares of our common stock, respectively, at an initial strike price that corresponded to the initial conversion price of the 2016 Notes and were exercisable upon conversion of the 2016 Notes. In addition, on the same dates, we sold warrants to acquire, subject to customary anti-dilution adjustments, approximately 3.5 million shares and approximately 0.5 million shares, respectively, of common stock. The warrants have a current strike price of $63.18 per share, as adjusted as of January 11, 2016 in connection with a conversion rate adjustment to the 2016 Notes pursuant to the terms of the indenture for such notes. The warrants become exercisable and expire in daily tranches over an approximately two-month period that started June 15, 2016. The market price of our common stock did not exceed the strike price of the warrants on any warrant expiration date in second quarter 2016; as a result, we were not required to issue any shares of common stock pursuant to these warrants during the quarter. Accounting Treatment of the 2016 Notes and related Convertible Note Hedge and Warrant Transactions The offering of the 2016 Notes on March 29, 2011 was for $200.0 million and included an overallotment option that allowed the initial purchaser to purchase up to an additional $30.0 million aggregate principal amount of 2016 Notes. The initial purchaser exercised its overallotment option on March 30, 2011, bringing the total amount of 2016 Notes issued on April 4, 2011 to $230.0 million . In connection with the offering of the 2016 Notes, as discussed above, the Company entered into convertible note hedge transactions with respect to its common stock. The $42.7 million cost of the convertible note hedge transactions was partially offset by the proceeds from the sale of the warrants described above, resulting in a net cost of $10.9 million . Existing accounting guidance provides that the March 29, 2011 convertible note hedge and warrant contracts be treated as derivative instruments for the period during which the initial purchaser's overallotment option was outstanding. Once the overallotment option was exercised on March 30, 2011, the March 29, 2011 convertible note hedge and warrant contracts were reclassified to equity, as the settlement terms of the Company's note hedge and warrant contracts both provide for net share settlement. There was no material net change in the value of these convertible note hedges and warrants during the one day they were classified as derivatives and the equity components of these instruments will not be adjusted for subsequent changes in fair value. Under current accounting guidance, the Company bifurcated the proceeds from the offering of the 2016 Notes between the liability and equity components of the debt. On the date of issuance, the liability and equity components were calculated to be approximately $187.0 million and $43.0 million , respectively. The initial $187.0 million liability component was determined based on the fair value of similar debt instruments excluding the conversion feature. The initial $43.0 million ( $28.0 million net of tax) equity component represents the difference between the fair value of the initial $187.0 million in debt and the $230.0 million of gross proceeds. The related initial debt discount of $43.0 million was being amortized using the effective interest method over the life of the 2016 Notes. An effective interest rate of 7% was used to calculate the debt discount on the 2016 Notes. In connection with the above-noted transactions, the Company incurred $8.0 million of directly related costs. The initial purchaser's transaction fees and related offering expenses were allocated to the liability and equity components of the debt in proportion to the allocation of proceeds and accounted for as debt issuance costs. We allocated $6.5 million of debt issuance costs to the liability component of the debt, which were capitalized as deferred financing costs. These costs were amortized to interest expense over the term of the debt using the effective interest method. The remaining $1.5 million of costs allocated to the equity component of the debt were recorded as a reduction of the equity component of the debt. 2020 Senior Convertible Notes, and related Note Hedge and Warrant Transactions On March 11, 2015, we issued $316.0 million in aggregate principal amount of 1.50% Senior Convertible Notes due 2020 (the “2020 Notes”). The 2020 Notes bear interest at a rate of 1.50% per year, payable in cash on March 1 and September 1 of each year, commencing September 1, 2015, and mature on March 1, 2020, unless earlier converted or repurchased. The 2020 Notes will be convertible into cash, shares of our common stock or a combination thereof, at our election, at an initial conversion rate of 13.8172 shares of common stock per $1,000 principal amount of 2020 Notes (which is equivalent to an initial conversion price of approximately $72.37 per share). It is our current intent and policy to settle all conversions through combination settlement of cash and shares of common stock, with a specified dollar amount of $1,000 per $1,000 principal amount of the 2020 Notes and any remaining amounts in shares. Prior to 5:00 p.m., New York City time, on the business day immediately preceding December 1, 2019, the 2020 Notes will be convertible only under certain circumstances as set forth in the indenture to the 2020 Notes. Commencing on December 1, 2019, the 2020 Notes will be convertible in multiples of $1,000 principal amount, at any time prior to 5:00 p.m., New York City time, on the second scheduled trading day immediately preceding the maturity date of the 2020 Notes. The Company may not redeem the 2020 Notes prior to their maturity date. On March 5 and March 9, 2015, in connection with the offering of the 2020 Notes, we entered into convertible note hedge transactions that cover approximately 3.8 million and approximately 0.6 million shares of our common stock, respectively, at a strike price that corresponds initially to the initial conversion price of the 2020 Notes and are exercisable upon conversion of the 2020 Notes. The cost of the March 5 and March 9, 2015 convertible note hedge transactions was approximately $51.7 million and approximately $7.7 million , respectively. On March 5 and March 9, 2015, we sold warrants to acquire, subject to customary anti-dilution adjustments, approximately 3.8 million and approximately 0.6 million , respectively, of common stock at an initial strike price of approximately $88.46 per share. The warrants become exercisable and expire in daily tranches over a three and a half month period starting in June 2020. As consideration for the warrants issued on March 5 and March 9, 2015, we received approximately $37.3 million and approximately $5.6 million , respectively. The Company also repurchased 0.8 million shares of our common stock at $53.61 per share, the closing price of the stock on March 5, 2015, from institutional investors through one of the initial purchasers and its affiliate, as our agent, concurrently with the pricing of the offering of the 2020 Notes. Accounting Treatment of the 2020 Notes and related Convertible Note Hedge and Warrant Transactions The offering of the 2020 Notes on March 5, 2015 was for $275.0 million and included an overallotment option that allowed the initial purchasers to purchase up to an additional $41.0 million aggregate principal amount of 2020 Notes. The initial purchasers exercised their overallotment option on March 9, 2015, bringing the total amount of 2020 Notes issued on March 11, 2015 to $316.0 million . In connection with the offering of the 2020 Notes, as discussed above, InterDigital entered into convertible note hedge transactions with respect to its common stock. The $59.4 million cost of the convertible note hedge transactions was partially offset by the proceeds from the sale of the warrants described above, resulting in a net cost of $16.5 million . Both the convertible note hedge and warrants were classified as equity. The Company bifurcated the proceeds from the offering of the 2020 Notes between liability and equity components. On the date of issuance, the liability and equity components were calculated to be approximately $256.7 million and $59.3 million , respectively. The initial $256.7 million liability component was determined based on the fair value of similar debt instruments excluding the conversion feature. The initial $59.3 million ( $38.6 million net of tax) equity component represents the difference between the fair value of the initial $256.7 million in debt and the $316.0 million of gross proceeds. The related initial debt discount of $59.3 million is being amortized using the effective interest method over the life of the 2020 Notes. An effective interest rate of 5.89% was used to calculate the debt discount on the 2020 Notes. In connection with the above-noted transactions, the Company incurred $9.3 million of directly related costs. The initial purchasers' transaction fees and related offering expenses were allocated to the liability and equity components in proportion to the allocation of proceeds and accounted for as debt and equity issuance costs, respectively. We allocated $7.0 million of debt issuance costs to the liability component, which were capitalized as deferred financing costs. These costs are being amortized to interest expense over the term of the debt using the effective interest method. The remaining $2.4 million of costs allocated to the equity component were recorded as a reduction of the equity component. The following table reflects the carrying value of the Company's convertible debt as of June 30, 2016 and December 31, 2015 (in thousands): June 30, 2016 December 31, 2015 2020 Notes 2016 Notes 2020 Notes Total Principal $ 316,000 $ 230,000 $ 316,000 $ 546,000 Less: Unamortized interest discount (45,176 ) (2,500 ) (50,614 ) (53,114 ) Deferred financing costs (5,096 ) (326 ) (5,791 ) (6,117 ) Net carrying amount of Notes $ 265,728 $ 227,174 $ 259,595 $ 486,769 The following table presents the amount of interest cost recognized for the three and six months ended June 30, 2016 and June 30, 2015 relating to the contractual interest coupon, accretion of the debt discount, and the amortization of financing costs (in thousands): For the Three Months Ended June 30, 2016 2015 2020 Notes 2016 Notes 2020 Notes Total Contractual coupon interest $ 1,185 $ 1,438 $ 1,053 $ 2,491 Accretion of debt discount 2,745 2,416 2,569 4,985 Amortization of deferred financing costs 347 326 349 675 Total $ 4,277 $ 4,180 $ 3,971 $ 8,151

Variable Interest Entities Vari

Variable Interest Entities Variable Interest Entities (Notes)	3 Months Ended
	Jun. 30, 2016
Variable Interest Entities [Abstract]
Equity Method Investments and Joint Ventures Disclosure [Text Block]	VARIABLE INTEREST ENTITIES As further discussed below, we are the primary beneficiary of two variable interest entities. As of June 30, 2016 , the combined book values of the assets and liabilities associated with these variable interest entities included in our Condensed Consolidated Balance Sheet were $22.2 million and $0.9 million , respectively. Assets included $15.2 million of cash and cash equivalents and $7.0 million of patents, net. As of December 31, 2015, the combined book values of the assets and liabilities associated with these variable interest entities included in our Condensed Consolidated Balance Sheet were $24.2 million and $0.8 million , respectively. Assets included $19.0 million of cash and cash equivalents and $5.2 million of patents, net. The impact of consolidating these variable interest entities on our Condensed Consolidated Statements of Income was not significant. Convida Wireless On September 26, 2015, we renewed and expanded our joint venture with Sony, Convida Wireless, to include 5G technologies. Convida Wireless was launched in 2013 to combine Sony's consumer electronics expertise with our pioneering Internet of Things (“IoT”) expertise to drive IoT communications and connectivity. Based on the terms of the agreement, the parties will contribute funding and resources for additional research and platform development, which we will perform. SCP IP Investment LLC, an affiliate of Stephens Inc., is a minority investor in Convida Wireless. Convida Wireless is a variable interest entity. Based on our provision of research and platform development services to Convida Wireless, we have determined that we remain the primary beneficiary for accounting purposes and will continue to consolidate Convida Wireless. For the three months ended June 30, 2016 and 2015, we have allocated approximately $1.0 million and $0.6 million , respectively, of Convida Wireless' net loss to noncontrolling interests held by other parties. For the six months ended June 30, 2016 and 2015, we have allocated approximately $1.9 million and $1.4 million , respectively, of Convida Wireless' net loss to noncontrolling interests held by other parties. Signal Trust for Wireless Innovation On October 17, 2013, we announced the establishment of the Signal Trust for Wireless Innovation (the “Signal Trust”), the goal of which is to monetize a large InterDigital patent portfolio related to cellular infrastructure. The more than 500 patents and patent applications transferred from InterDigital to the Signal Trust focus primarily on 3G and LTE technologies, and were developed by InterDigital's engineers and researchers over more than a decade, with a number of the innovations contributed to the worldwide standards process. InterDigital is the primary beneficiary of the Signal Trust. The distributions from the Signal Trust will support continued research related to cellular wireless technologies. A small portion of the proceeds from the Signal Trust will be used to fund, through the Signal Foundation for Wireless Innovation, scholarly analysis of intellectual property rights and the technological, commercial and creative innovations they facilitate. The Signal Trust is a variable interest entity. Based on the terms of the Trust Agreement, we have determined that we are the primary beneficiary for accounting purposes and must consolidate the Signal Trust.

Net Income Per Share (Tables)

Net Income Per Share (Tables)	6 Months Ended
	Jun. 30, 2016
NET INCOME PER SHARE: [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	For the Three Months Ended June 30, 2016 2015 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 39,994 $ 39,994 $ 32,602 $ 32,602 Denominator: Weighted-average shares outstanding: Basic 34,499 34,499 36,022 36,022 Dilutive effect of stock options, RSUs, convertible securities and warrants 446 420 Weighted-average shares outstanding: Diluted 34,945 36,442 Earnings Per Share: Net income: Basic $ 1.16 $ 1.16 $ 0.91 $ 0.91 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.02 ) (0.02 ) Net income: Diluted $ 1.14 $ 0.89 For the Six Months Ended June 30, 2016 2015 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 68,065 $ 68,065 $ 61,667 $ 61,667 Denominator: Weighted-average shares outstanding: Basic 34,772 34,772 36,486 36,486 Dilutive effect of stock options, RSUs, convertible securities and warrants 389 397 Weighted-average shares outstanding: Diluted 35,161 36,883 Earnings Per Share: Net income: Basic $ 1.96 $ 1.96 $ 1.69 $ 1.69 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.02 ) (0.02 ) Net income: Diluted $ 1.94 $ 1.67 NET INCOME PER SHARE Basic Earnings Per Share ("EPS") is calculated by dividing net income available to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if options or other securities with features that could result in the issuance of common stock were exercised or converted to common stock. The following tables reconcile the numerator and the denominator of the basic and diluted net income per share computation (in thousands, except for per share data): For the Three Months Ended June 30, 2016 2015 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 39,994 $ 39,994 $ 32,602 $ 32,602 Denominator: Weighted-average shares outstanding: Basic 34,499 34,499 36,022 36,022 Dilutive effect of stock options, RSUs, convertible securities and warrants 446 420 Weighted-average shares outstanding: Diluted 34,945 36,442 Earnings Per Share: Net income: Basic $ 1.16 $ 1.16 $ 0.91 $ 0.91 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.02 ) (0.02 ) Net income: Diluted $ 1.14 $ 0.89 For the Six Months Ended June 30, 2016 2015 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 68,065 $ 68,065 $ 61,667 $ 61,667 Denominator: Weighted-average shares outstanding: Basic 34,772 34,772 36,486 36,486 Dilutive effect of stock options, RSUs, convertible securities and warrants 389 397 Weighted-average shares outstanding: Diluted 35,161 36,883 Earnings Per Share: Net income: Basic $ 1.96 $ 1.96 $ 1.69 $ 1.69 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.02 ) (0.02 ) Net income: Diluted $ 1.94 $ 1.67 Certain shares of common stock issuable upon the exercise or conversion of certain securities have been excluded from our computation of earnings per share because the strike price or conversion rate, as applicable, of such securities was less than the average market price of our common stock for second quarter 2016 and second quarter 2015, as applicable, and, as a result, the effect of such exercise or conversion would have been anti-dilutive. Set forth below are the securities and the weighted average number of shares of common stock underlying such securities that were excluded from our computation of earnings per share for the periods presented (in thousands): For the Three Months Ended June 30, For the Six Months Ended June 30, 2016 2015 2016 2015 Restricted stock units and stock options 142 94 159 58 Convertible securities 4,366 4,366 6,068 6,803 Warrants 8,455 8,496 8,502 6,808 Total 12,963 12,956 14,729 13,669

Equity Transactions Shareholder

Equity Transactions Shareholders Equity Rollforward (Tables)	6 Months Ended
	Jun. 30, 2016
EQUITY TRANSACTIONS: [Abstract]
Schedule of Stockholders Equity [Table Text Block]	Changes in shareholders’ equity for the six months ended June 30, 2016 and June 30, 2015 were as follows (in thousands): For the Six Months Ended June 30, 2016 2015 Balance beginning of period, December 31 $ 510,519 $ 468,328 Net income attributable to InterDigital, Inc. 68,065 61,667 Unrealized gain on investments, net 388 8 Cash dividends declared (13,784 ) (14,475 ) Repurchase of common stock (58,995 ) (70,572 ) Convertible note hedge transactions, net of tax — (38,594 ) Warrant transactions — 42,881 Equity component of the 2020 Notes, net of tax — 38,567 Deferred financing costs allocated to equity — (2,430 ) Exercise of common stock options 228 26 Taxes withheld upon restricted stock unit vestings (3,325 ) (9,557 ) Tax benefit from share-based compensation (9 ) 2,163 Share-based compensation 10,580 6,299 Total InterDigital, Inc. shareholders’ equity end of period $ 513,667 $ 484,311 Noncontrolling Interest Balance beginning of period, December 31 11,376 7,349 Proceeds from noncontrolling interests — 2,551 Net loss attributable to noncontrolling interest (1,885 ) (1,380 ) Noncontrolling interest 9,491 8,520 Total Equity end of period $ 523,158 $ 492,831

Concentration of Credit Risk 17

Concentration of Credit Risk and Fair Value of Financial Assets and Liabilities (Tables)	6 Months Ended
	Jun. 30, 2016
CONCENTRATION OF CREDIT RISK AND FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES: [Abstract]
Fair Value, Measurement Inputs, Disclosure [Table Text Block]	Our financial assets that are accounted for at fair value on a recurring basis are presented in the tables below as of June 30, 2016 and December 31, 2015 (in thousands): Fair Value as of June 30, 2016 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 570,753 $ — $ — $ 570,753 Commercial paper (b) — 47,021 — 47,021 U.S. government securities — 138,863 — 138,863 Corporate bonds, asset backed and other securities — 57,261 — 57,261 $ 570,753 $ 243,145 $ — $ 813,898 ______________________________ (a) Included within cash and cash equivalents. (b) Includes $30.6 million of commercial paper that is included within cash and cash equivalents. Fair Value as of December 31, 2015 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 333,671 $ — $ — $ 333,671 Commercial paper (b) — 377,347 — 377,347 U.S. government securities — 183,950 — 183,950 Corporate bonds, asset backed and other securities 183 38,557 — 38,740 $ 333,854 $ 599,854 $ — $ 933,708 ______________________________ (a) Included within cash and cash equivalents. (b) Includes $176.5 million of commercial paper that is included within cash and cash equivalents.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2016
Long-term Debt, Unclassified [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	The following table reflects the carrying value of the Company's convertible debt as of June 30, 2016 and December 31, 2015 (in thousands): June 30, 2016 December 31, 2015 2020 Notes 2016 Notes 2020 Notes Total Principal $ 316,000 $ 230,000 $ 316,000 $ 546,000 Less: Unamortized interest discount (45,176 ) (2,500 ) (50,614 ) (53,114 ) Deferred financing costs (5,096 ) (326 ) (5,791 ) (6,117 ) Net carrying amount of Notes $ 265,728 $ 227,174 $ 259,595 $ 486,769 The following table presents the amount of interest cost recognized for the three and six months ended June 30, 2016 and June 30, 2015 relating to the contractual interest coupon, accretion of the debt discount, and the amortization of financing costs (in thousands): For the Three Months Ended June 30, 2016 2015 2020 Notes 2016 Notes 2020 Notes Total Contractual coupon interest $ 1,185 $ 1,438 $ 1,053 $ 2,491 Accretion of debt discount 2,745 2,416 2,569 4,985 Amortization of deferred financing costs 347 326 349 675 Total $ 4,277 $ 4,180 $ 3,971 $ 8,151

Significant Agreements Signif19

Significant Agreements Significant Agreements (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Patent licensing royalties	$ 74,900	$ 116,622	$ 181,854	$ 225,595

Significant Agreements Assets H

Significant Agreements Assets Held For Sale (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Long Lived Assets Held-for-sale [Line Items]
Sale Leaseback Transaction, Net Proceeds, Investing Activities	$ 4,500
Gain (Loss) on Disposition of Assets		$ (3,491)	$ 0
King of Prussia [Domain]
Long Lived Assets Held-for-sale [Line Items]
Gain (Loss) on Disposition of Assets		$ 3,400

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Income Tax Contingency [Line Items]
Effective Income Tax Rate, Continuing Operations			4.10%	(37.70%)
Income Tax Expense (Benefit)	$ (16,652)	$ 18,877	$ (2,584)	$ 36,553
Income Taxes Paid			52,285	36,764
Taxes payable	$ 11,810		11,810		$ 1,405
Domestic Tax Authority [Member]
Income Tax Contingency [Line Items]
Income Tax Expense (Benefit)			23,700
Foreign Country [Member]
Income Tax Contingency [Line Items]
Income Taxes Paid			$ 43,700	$ 24,000

Net Income Per Share (Details)

Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share, Basic & Dilutive, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Attributable to Parent	$ 39,994,000	$ 32,602,000	$ 68,065,000	$ 61,667,000
Weighted Average Number of Shares Outstanding, Basic	34,499	36,022	34,772	36,486
Weighted Average Number Diluted Shares Outstanding Adjustment	446	420	389	397
Weighted Average Number of Shares Outstanding, Diluted	34,945	36,442	35,161	36,883
Dilutive Securities, Efffect on Basic Earnings Per Share [2]	$ (0.02)	$ (0.02)	$ (0.02)	$ (0.02)
Net Incme Per Common Share, Basic	$ 1.16	$ 0.91	$ 1.96	$ 1.69
Net Income Per Common Share, Diluted	$ 1.14	$ 0.89	$ 1.94	$ 1.67
Convertible Debt Securities [Member]
Earnings Per Share, Basic & Dilutive, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4,366	4,366	6,068	6,803
Warrant [Member]
Earnings Per Share, Basic & Dilutive, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	8,455	8,496	8,502	6,808

Net Income Per Share Antidiluti

Net Income Per Share Antidilutive Securities Excluded from Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4,366	4,366	6,068	6,803
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	8,455	8,496	8,502	6,808
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	142	94	159	58

Litigation and Legal Proceedi24

Litigation and Legal Proceedings (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Legal Gain (Loss) Contingencies [Line Items]
Deferred Revenue, Current	$ 309,340	$ 106,229

Equity Transactions (Details)

Equity Transactions (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended							6 Months Ended		9 Months Ended	12 Months Ended		24 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Mar. 31, 2011	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2016	Mar. 09, 2015	Mar. 05, 2015	Jun. 30, 2014	Mar. 30, 2011	Mar. 29, 2011
Class of Stock [Line Items]
CASH DIVIDEND DECLARED PER COMMON SHARE	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20		$ 0.40	$ 0.40		$ 0.80
Noncontrolling Interest, Increase from Business Combination									$ 2,551
Noncontrolling Interest in Variable Interest Entity	$ 9,491		$ 11,376		$ 8,520			$ 9,491	8,520		$ 11,376	$ 7,349	$ 9,491
Net Income (Loss) Attributable to Noncontrolling Interest	(965)				(647)			(1,885)	(1,380)
Equity Transactions [Roll Forward]
Balance as of December 31, 2011		$ 510,519		$ 484,311		$ 468,328		510,519	468,328	$ 468,328	468,328
NET INCOME	39,994				32,602			68,065	61,667
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	136				13			388	8
Adjustments Related to Tax Withholding for Share-based Compensation								3,325	(9,557)
Balance as of September 30, 2012	513,667		510,519		484,311			513,667	484,311		510,519	$ 468,328	513,667
Dividends, Common Stock, Cash	6,861	$ 6,923	7,068	$ 7,183	7,243	$ 7,232		13,784	14,475	$ 21,658	28,726
Proceeds from Issuance of Warrants								0	42,881
Proceeds from Stock Options Exercised								228	26
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities								0	2,163
Share-based Compensation								10,580	6,299
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	523,158		$ 521,895		492,831			523,158	492,831		$ 521,895		523,158
Convertible Debt [Member] | Equity [Member]
Class of Stock [Line Items]
Payments of Financing Costs					$ (2,400)			0	(2,430)
Equity Transactions [Roll Forward]
Class of Warrant or Right, Outstanding														600	3,800		500	3,500
Warrant Option Strike Price															$ 88.46			$ 63.18
Note Warrant2 [Member]
Equity Transactions [Roll Forward]
Proceeds from Issuance of Warrants							$ 27,600		37,300
Class of Warrant or Right [Domain]
Equity Transactions [Roll Forward]
Proceeds from Issuance of Warrants							$ 4,100		$ 5,600
2014 Repurchase Program [Domain]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 400,000							$ 400,000					$ 400,000			$ 300,000
Treasury Stock Acquired, Repurchase Authorization									100
Stock Repurchased During Period, Shares								1,202			1,836	3,554	6,592
Accelerated Share Repurchases, Initial Price Paid Per Share										$ 53.61
Equity Transactions [Roll Forward]
Stock Repurchased During Period, Value								$ 58,995			$ 96,410	$ 152,625	$ 308,030
2014 Repurchase Program [Domain] | Repurchases related to 2020 Notes [Member]
Class of Stock [Line Items]
Stock Repurchased During Period, Shares										800

Equity Transactions Equity Roll

Equity Transactions Equity Rollforward (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended							6 Months Ended		9 Months Ended	12 Months Ended		24 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Mar. 31, 2011	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2016	Jun. 30, 2014
Class of Stock [Line Items]
Proceeds from Issuance of Warrants								$ 0	$ 42,881
CASH DIVIDEND DECLARED PER COMMON SHARE	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20		$ 0.40	$ 0.40		$ 0.80
Dividends, Common Stock, Cash	$ 6,861	$ 6,923	$ 7,068	$ 7,183	$ 7,243	$ 7,232		$ 13,784	$ 14,475	$ 21,658	$ 28,726
Equity component of the 2020 Notes, net of tax								0	38,567
Stockholders' Equity Attributable to Parent	513,667		510,519		484,311			513,667	484,311		510,519	$ 468,328	$ 513,667
Adjustments Related to Tax Withholding for Share-based Compensation								(3,325)	9,557
Tax benefit from share-based compensation								(9)	0
Net Income (Loss) Attributable to Parent	39,994				32,602			68,065	61,667
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	136				13			388	8
Cash dividends declared								(13,784)	14,475
Repurchase of common stock								(58,995)	(70,572)
Proceeds from Stock Options Exercised								228	26
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities								0	2,163
Convertible note hedge transactions, net of tax								0	(38,594)
Share-based Compensation								10,580	6,299
Noncontrolling Interest, Increase from Business Combination									(2,551)
Net Income (Loss) Attributable to Noncontrolling Interest	(965)				(647)			(1,885)	(1,380)
Noncontrolling Interest in Variable Interest Entity	9,491		11,376		8,520			9,491	8,520		11,376	$ 7,349	9,491
Proceeds from noncontrolling interests								0	2,551
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	523,158		$ 521,895		$ 492,831			523,158	492,831		$ 521,895		523,158
Class of Warrant or Right [Domain]
Class of Stock [Line Items]
Proceeds from Issuance of Warrants							$ 4,100		$ 5,600
2014 Repurchase Program [Domain]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 400,000							$ 400,000					$ 400,000	$ 300,000
Stock Repurchased During Period, Shares								1,202			1,836	3,554	6,592
Stock Repurchased During Period, Value								$ 58,995			$ 96,410	$ 152,625	$ 308,030

Equity Transactions Adjustments

Equity Transactions Adjustments for Tax Withholding (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Class of Stock [Line Items]
Payments of Debt Issuance Costs	$ 0	$ 9,403
Adjustments Related to Tax Withholding for Share-based Compensation	$ (3,325)	$ 9,557

Concentration of Credit Risk 28

Concentration of Credit Risk and Fair Value of Financial Assets and Liabilities (Details)	12 Months Ended
	Dec. 31, 2015
Concentration Risk [Line Items]
Concentration Risk, Percentage	97.00%
Concentration Risk, Customer	four

Concentration of Credit Risk 29

Concentration of Credit Risk and Fair Value of Financial Assets and Liabilities Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes	$ 265,728	$ 486,769
Assets, Fair Value Disclosure, Recurring	813,898	933,708
Commercial Paper	30,600	176,500
LONG-TERM DEBT	265,728	259,595
Long-term Debt, Fair Value	328,839	533,203
Money Market Funds and Demand Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	570,753	333,671
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	47,021	377,347
US Government and Government Agencies and Authorities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	138,863	183,950
Corporate Bonds and Asset Backed Securities [Domain]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	57,261	38,740
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	570,753	333,854
Fair Value, Inputs, Level 1 [Member] | Money Market Funds and Demand Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	570,753	333,671
Fair Value, Inputs, Level 1 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0
Fair Value, Inputs, Level 1 [Member] | US Government and Government Agencies and Authorities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0
Fair Value, Inputs, Level 1 [Member] | Corporate Bonds and Asset Backed Securities [Domain]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	183
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	243,145	599,854
Fair Value, Inputs, Level 2 [Member] | Money Market Funds and Demand Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0
Fair Value, Inputs, Level 2 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	47,021	377,347
Fair Value, Inputs, Level 2 [Member] | Corporate Bonds and Asset Backed Securities [Domain]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	57,261	38,557
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0
Fair Value, Inputs, Level 3 [Member] | Money Market Funds and Demand Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0
Fair Value, Inputs, Level 3 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0
Fair Value, Inputs, Level 3 [Member] | US Government and Government Agencies and Authorities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0
Fair Value, Inputs, Level 3 [Member] | Corporate Bonds and Asset Backed Securities [Domain]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	$ 0	$ 0

Long-Term Debt (Details)

Long-Term Debt (Details) $ / shares in Units, shares in Millions	3 Months Ended			6 Months Ended			12 Months Ended
	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2011USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2012USD ($)	Dec. 31, 2011USD ($)	Dec. 31, 2015USD ($)	Mar. 31, 2015USD ($)	Mar. 11, 2015USD ($)$ / shares	Mar. 09, 2015shares	Mar. 05, 2015USD ($)$ / sharesshares	Jun. 30, 2011USD ($)	Apr. 04, 2011USD ($)	Mar. 30, 2011shares	Mar. 29, 2011USD ($)$ / sharesshares
Debt Instrument [Line Items]
Interest Expense, Debt, Excluding Amortization		$ 2,491,000		$ 3,807,000	$ 4,323,000
Accretion of Discount		4,985,000		7,938,000	8,184,000
Amortization of Financing Costs		675,000		1,021,000	1,117,000
Proceeds from Issuance of Warrants				0	42,881,000
Senior Notes	$ 265,728,000			265,728,000				$ 486,769,000
Payments for (Proceeds from) Hedge, Financing Activities				0	(38,594,000)
Debt Instrument, Unamortized Discount								(53,114,000)
Deferred financing costs								(6,117,000)
Proceeds from (Payments for) Other Financing Activities				0	4,500,000
Debt Instrument, Interest Rate, Effective Percentage														7.00%
Payments of Debt Issuance Costs				0	(9,403,000)
Interest Expense		8,151,000		12,766,000	13,624,000
Long-term Debt, Fair Value	328,839,000			328,839,000				533,203,000
Note Warrant2 [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Warrants			$ 27,600,000		37,300,000
Class of Warrant or Right [Domain]
Debt Instrument [Line Items]
Proceeds from Issuance of Warrants			$ 4,100,000		5,600,000
Convertible Note Hedge 2 [Member]
Debt Instrument [Line Items]
Proceeds from (Payments for) Other Financing Activities					7,700,000
Convertible Note Hedge [Member]
Debt Instrument [Line Items]
Proceeds from (Payments for) Other Financing Activities					59,400,000		$ 42,700,000
Convertible Note Hedge 1 [Member]
Debt Instrument [Line Items]
Proceeds from (Payments for) Other Financing Activities					51,700,000
Convertible Note/ Hedge Warrant, net [Member]
Debt Instrument [Line Items]
Proceeds from (Payments for) Other Financing Activities					16,500,000		$ 10,900,000
Convertible Notes 2016 [Member] | Convertible Notes 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount													$ 230,000,000
Convertible Note Overallotment [Member]
Debt Instrument [Line Items]
Senior Notes												$ 41,000,000				$ 30,000,000
Convertible Debt [Member]
Debt Instrument [Line Items]
Senior Notes	316,000,000			316,000,000				546,000,000
Payments of Debt Issuance Costs					(9,300,000)	$ (8,000,000)
Convertible Debt [Member] | Convertible Notes 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount								230,000,000
Interest Expense, Debt, Excluding Amortization		1,438,000		1,437,000	2,875,000
Accretion of Discount		2,416,000		2,500,000	4,750,000
Amortization of Financing Costs		326,000		326,000	652,000
Senior Notes								227,174,000
Debt Instrument, Unamortized Discount								(2,500,000)
Deferred financing costs								(326,000)
Debt Instrument, Interest Rate, Stated Percentage														2.50%
Interest Expense		4,180,000		4,263,000	8,277,000
Convertible Debt [Member] | Convertible Notes 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	316,000,000			316,000,000				316,000,000
Interest Expense, Debt, Excluding Amortization	1,185,000	1,053,000		2,370,000	1,448,000
Accretion of Discount	2,745,000	2,569,000		5,438,000	3,434,000
Amortization of Financing Costs	347,000	349,000		695,000	465,000
Senior Notes	265,728,000			265,728,000				259,595,000
Debt Instrument, Unamortized Discount	(45,176,000)			(45,176,000)				(50,614,000)
Deferred financing costs	(5,096,000)			(5,096,000)				$ (5,791,000)
Debt Conversion, Converted Instrument, Amount					$ 1,000
Debt Instrument, Convertible, Conversion Price | $ / shares										$ 72.37
Debt Instrument, Interest Rate, Stated Percentage										1.50%
Debt Instrument, Convertible, Conversion Ratio					13.8172
Interest Expense	$ 4,277,000	3,971,000		8,503,000	$ 5,347,000
Convertible Notes 2020 [Member] | Convertible Notes 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount									$ 316,000,000
Convertible Debt 1 [Member]
Debt Instrument [Line Items]
Senior Notes												$ 275,000,000				$ 200,000,000
Balance Sheet by Location [Domain] | Convertible Debt [Member]
Debt Instrument [Line Items]
Senior Notes										$ 256,700,000				$ 187,000,000
Other Long-term Liabilities [Member] | Convertible Debt [Member]
Debt Instrument [Line Items]
Payments of Debt Issuance Costs					(7,000,000)	(6,500,000)
Equity [Member] | Convertible Debt [Member]
Debt Instrument [Line Items]
Senior Notes										59,300,000				43,000,000
Senior Convertible Notes [Equity net of tax]										$ 38,600,000				$ 28,000,000
Class of Warrant or Right, Outstanding | shares											0.6	3.8			0.5	3.5
Warrant Option Strike Price | $ / shares												$ 88.46				$ 63.18
Payments of Debt Issuance Costs						$ 1,500,000
Payments of Financing Costs		$ (2,400,000)		$ 0	$ (2,430,000)

Variable Interest Entities (Det

Variable Interest Entities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 22,200		$ 22,200		$ 24,200
Net Income (Loss) Attributable to Noncontrolling Interest	(965)	$ (647)	(1,885)	$ (1,380)
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	900		900		800
Cash and Cash Equivalents [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	15,200		15,200		19,000
Patents [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 7,000		$ 7,000		$ 5,200

Deferred Revenue (Details)

Deferred Revenue (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Customer Advances, Current	$ 200,000
Deferred Revenue, Current	309,340	$ 106,229
LONG-TERM DEFERRED REVENUE	$ 298,675	$ 289,039