InterDigital (IDCC) 10-Q 27 Apr 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Apr. 25, 2017	Dec. 31, 2016
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	70,699,000		70,318,000
Common Stock, Shares, Outstanding	34,679,000		34,298,000
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	36,020,000		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	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		34,681,903
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	Mar. 31, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 139,073	$ 404,074
Short-term investments	747,067	548,687
Accounts receivable, less allowances of $1,750	402,533	228,464
Prepaid and other current assets	53,562	39,894
Total current assets	1,342,235	1,221,119
NON-CURRENT ASSETS:
PROPERTY AND EQUIPMENT, NET	12,033	12,626
PATENTS, NET	306,075	310,768
DEFERRED TAX ASSETS	170,976	149,532
OTHER NON-CURRENT ASSETS, NET	34,069	33,808
Total non-current assets	523,153	506,734
TOTAL ASSETS	1,865,388	1,727,853
CURRENT LIABILITIES:
Accounts payable	17,694	14,050
Accrued compensation and related expenses	11,145	22,065
Taxes payable	39,190	10,660
Dividend payable	10,404	10,290
Other accrued expenses	7,908	8,223
Total current liabilities	414,665	425,480
LONG-TERM DEBT	275,222	272,021
NON-CURRENT LIABILITIES
LONG-TERM DEFERRED REVENUE	398,960	261,013
OTHER LONG-TERM LIABILITIES	16,400	14,971
TOTAL LIABILITIES	1,105,247	973,485
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	707	703
Additional paid-in capital	667,152	683,549
Retained earnings	1,143,955	1,120,766
Accumulated other comprehensive income	(559)	(514)
Stockholders' Equity before Treasury Stock	1,811,255	1,804,504
Treasury stock, 25,957 and 23,570 shares of common held at cost	1,064,795	1,064,795
Total shareholders’ equity	746,460	739,709
Noncontrolling Interest in Variable Interest Entity	13,681	14,659
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	760,141	754,368
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 1,865,388	$ 1,727,853

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Patent licensing royalties	$ 89,226	$ 106,954
Technology solutions	5,304	810
REVENUES	94,530	107,764
OPERATING EXPENSES:
Patent administration and licensing	29,407	27,167
Development	18,521	20,269
Selling, general and administrative	12,634	11,972
Total Operating Expenses	60,562	59,408
Income from operations	33,968	48,356
OTHER INCOME:
Interest and investment income, net	(2,814)	(7,137)
Income before income taxes	31,154	41,219
INCOME TAX PROVISION	1,624	(14,068)
NET INCOME	33,756	28,071
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	32,778	27,151
Net Income (Loss) Attributable to Noncontrolling Interest	$ (978)	$ (920)
NET INCOME PER COMMON SHARE — BASIC	$ 0.98	$ 0.80
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — BASIC	34,370	35,045
NET INCOME PER COMMON SHARE — DILUTED	$ 0.93	$ 0.79
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — DILUTED	36,220	35,377
CASH DIVIDEND DECLARED PER COMMON SHARE	$ 0.30	$ 0.20

Condensed Consolidated Stateme4

Condensed Consolidated Statements of Other Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 32,778	$ 27,151
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(45)	252
Comprehensive (loss) income	32,733	27,403
Net Income (Loss) Attributable to Noncontrolling Interest	(978)	(920)
Total comprehensive income	$ 33,711	$ 28,323

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows (Unaudited) Statement - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest Paid	$ 2,370	$ 5,245
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	32,778	27,151
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,528	12,876
Amortization of deferred financing fees and accretion of debt discount	3,201	5,866
Deferred revenue recognized	(78,921)	(34,594)
Increase (Decrease) in deferred revenue	185,000	80,440
Deferred income taxes	(21,444)	(11,291)
Tax benefit from share-based compensation	0	(46)
Share-based Compensation	5,317	6,643
Other	1	(141)
Decrease (increase) in assets:
Receivables	(174,069)	(60,740)
Other current assets	(13,486)	(1,344)
Increase (decrease) in liabilities:
Accounts payable	2,516	(1,232)
Other accrued expenses	(9,805)	(15,951)
Accrued taxes payable	28,529	12,001
Net cash provided by operating activities	(25,855)	19,638
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term investments	(429,941)	(19,446)
Sales of short-term investments	231,516	308,936
Purchases of property and equipment	(268)	(1,594)
Capitalized patent costs	(7,787)	(8,062)
Acquisition of patents	0	(4,500)
Payments to Acquire Long-term Investments	(501)	0
Net cash used in investing activities	(206,981)	275,334
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on long-term debt	0	(230,000)
Net proceeds from exercise of stock options	82	0
Dividends paid	(10,292)	(7,068)
Adjustments Related to Tax Withholding for Share-based Compensation	(21,955)	(3,405)
Repurchase of common stock	0	(40,399)
Net cash provided (used) by financing activities	(32,165)	(280,872)
NET INCREASE IN CASH AND CASH EQUIVALENTS	(265,001)	14,100
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	404,074	510,207
CASH AND CASH EQUIVALENTS, END OF PERIOD	139,073	524,307
Income Taxes Paid	2,990	14,423
Dividend payable	10,404	6,923
Accrued capitalized patent costs and acquisition of patents	$ (1,128)	$ (523)

Significant Accounting Policies

Significant Accounting Policies (Notes)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 , and the results of our operations for the three months ended March 31, 2017 and 2016 and our cash flows for the three months ended March 31, 2017 and 2016 . 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 United States 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, 2016 (our “ 2016 Form 10-K ”) as filed with the Securities and Exchange Commission (“SEC”) on February 23, 2017. 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 to our existing accounting policies from the disclosures included in our 2016 Form 10-K except as set forth below under "New Accounting Guidance." New Accounting Guidance Accounting Standards Update: Stock Compensation In March 2016, the 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. We applied the standard beginning in first quarter 2017. Certain elements of our accounting for compensation costs associated with share-based transactions changed upon adoption of ASC 2016-09. We no longer account for these costs net of estimated award forfeitures. Instead, we adjust expense recognized to date in the event of canceled awards as they occur. The elimination of estimated forfeitures did not have a material impact on our financial statements for first quarter 2017. Additionally, tax windfalls and shortfalls related to the tax effects of employee share-based compensation no longer reside within additional paid-in-capital. Rather, these windfalls and shortfalls are included in our tax provision. We also adjusted our disclosures included within our Consolidated Statements of Cash Flows. Tax windfalls and shortfalls related to employee share-based compensation awards are included within operating activities on a prospective basis and cash paid to tax authorities for shares withheld is included within financing activities retrospectively. Although these changes have no impact on the amount of share-based compensation expense we ultimately recognize, the inclusion of windfalls and shortfalls in the tax provision could increase our earnings volatility between periods. Refer to the Note 2, " Income Taxes," for detail regarding the impact of these changes on our financial statements for first quarter 2017. 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. 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 in exchange for those goods or services. 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 expect the new guidance will affect our recognition of revenue from both our fixed-fee and per-unit license agreements. For accounting purposes under this new guidance, we will separate our fixed-fee license agreements into two categories: (i) those agreements that provide rights, over the term of the license, to future technologies that are highly interdependent or highly interrelated to the technologies provided at the inception of the agreement (“Dynamic Fixed-Fee Agreements”) and (ii) those agreements that do not provide for rights to such future technologies (“Static Fixed-Fee Agreements”). Under our current accounting practices, after the fair value allocation between the past and future components of the agreement, we recognize the future components of revenue from all fixed-fee license agreements on a straight-line basis over the term of the related license agreement. Upon adoption of the new guidance, we expect to continue to recognize revenue from Dynamic Fixed-Fee Agreements on a straight-line basis over the term of the related license agreement, while we expect to recognize most or all of the revenue from Static Fixed-Fee Agreements in the quarter the license agreement is signed. Based on our preliminary classifications of fixed-fee license agreements as either “Dynamic” or "Static," in first quarter 2017, approximately 69% of our fixed-fee revenue was derived from Dynamic Fixed-Fee Agreements, with the remainder coming from Static Fixed-Fee Agreements. In addition, under our current accounting practices, we recognize revenue from our per-unit license agreements in the period in which we receive the related royalty report, generally one quarter in arrears from the period in which the underlying sales occur. Upon adoption of the new guidance, we will be required to record per-unit royalty revenue in the same period in which the licensee’s underlying sales occur. Because we do not expect to receive the per-unit licensee royalty reports for sales during a given quarter within the time frame necessary to adequately review the reports and include the actual amounts in our quarterly results for such quarter, we expect to accrue the related revenue based on estimates of our licensees’ underlying sales, subject to certain constraints on our ability to estimate such amounts. As a result of accruing revenue for the quarter based on such estimates, adjustments will likely be required in the following quarter to true-up revenue to the actual amounts reported by our licensees. In addition, to the extent we receive prepayments related to per-unit license agreements that do not provide rights, over the term of the license, to future technologies that are highly interdependent or highly interrelated to the technologies provided at the inception of the agreement, we will recognize such prepayments as revenue in the period in which all remaining revenue recognition criteria have been met. We do not intend to adopt the new guidance early and have not reached a final conclusion on the transition method we will adopt. Accounting Standards Update: Leases In February 2016, the FASB issued new guidance related to leases that outlines a comprehensive lease accounting model and supersedes the current lease guidance. The new guidance requires lessees to recognize lease liabilities and corresponding right-of-use assets for all leases with lease terms of greater than 12 months. It also changes the definition of a lease and expands the disclosure requirements of lease arrangements. The new guidance must be adopted using the modified retrospective approach and will be effective for the Company starting in the first quarter of 2020. Early adoption is permitted. We are in the process of determining the effect the adoption will have on the Company's consolidated financial statements. Accounting Standards Update: Clarifying the Definition of a Business In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business." ASU 2017-01 narrows the existing definition of a business and provides a framework for evaluating whether a transaction should be accounted for as an acquisition (or disposal) of assets or a business. The guidance requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets; if so, the set of transferred assets and activities (collectively, the set) is not a business. To be considered a business, the set would need to include an input and a substantive process that together significantly contribute to the ability to create outputs, as defined by the ASU. The Company adopted this guidance early during first quarter 2017 and it had no immediate impact on the Company’s consolidated financial statements. Accounting Standards Update: Simplifying the Test for Goodwill Impairment In January 2017, the FASB issued ASU No. 2017-04, "Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment," which eliminates the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge (Step 2) from the goodwill impairment test. Instead, an impairment charge will equal the amount by which a reporting unit’s carrying amount exceeds its fair value, not to exceed the amount of goodwill allocated to the reporting unit. The Company adopted this guidance early during first quarter 2017 and it had no immediate impact on the Company’s consolidated financial statements.

Income Taxes (Notes)

Income Taxes (Notes)	3 Months Ended
	Mar. 31, 2017
Income Tax Contingency [Line Items]
Income Tax Disclosure [Text Block]	. INCOME TAXES In first quarter 2017, based on the statutory federal tax rate net of discrete federal and state taxes, our effective tax rate was a benefit of 5.2% . The effective tax rate for the three months ending March 31, 2017 was favorably impacted by our current year adoption of ASU 2016-09, “Improvements to Employee Share-Based Payment Accounting,” as discussed above in Note 1, " Basis of Presentation. " In conjunction with our adoption of the standard, we recorded discrete benefits of $11.8 million for excess tax benefits related to share-based compensation. The effective rate would have been a provision of 32.6% not including these discrete benefits. This is compared to an effective tax rate provision of 34.1% based on the statutory federal tax rate net of discrete federal and state taxes during first quarter 2016. Additionally, our first quarter 2017 effective tax rate includes an estimated deduction for domestic productions activities, which was not present in first quarter 2016. During first quarter 2017 and 2016, we paid approximately $3.0 million and $14.3 million , respectively, of foreign source withholding tax. Additionally, as of March 31, 2017 and December 31, 2016, we have included $39.2 million and $10.7 million , respectively, of foreign source withholding tax within our taxes payable and deferred tax asset balances. These amounts are related to receivables from foreign licensees.

Net Income Per Share (Notes)

Net Income Per Share (Notes)	3 Months Ended
	Mar. 31, 2017
NET INCOME PER SHARE: [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	For the Three Months Ended March 31, 2017 2016 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 33,756 $ 33,756 $ 28,071 $ 28,071 Denominator: Weighted-average shares outstanding: Basic 34,370 34,370 35,045 35,045 Dilutive effect of stock options, RSUs, convertible securities and warrants 1,850 332 Weighted-average shares outstanding: Diluted 36,220 35,377 Earnings Per Share: Net income: Basic $ 0.98 $ 0.98 $ 0.80 $ 0.80 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.05 ) (0.01 ) Net income: Diluted $ 0.93 $ 0.79 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 March 31, 2017 2016 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 33,756 $ 33,756 $ 28,071 $ 28,071 Denominator: Weighted-average shares outstanding: Basic 34,370 34,370 35,045 35,045 Dilutive effect of stock options, RSUs, convertible securities and warrants 1,850 332 Weighted-average shares outstanding: Diluted 36,220 35,377 Earnings Per Share: Net income: Basic $ 0.98 $ 0.98 $ 0.80 $ 0.80 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.05 ) (0.01 ) Net income: Diluted $ 0.93 $ 0.79 Certain shares of common stock issuable upon the exercise or conversion of certain securities have been excluded from our computation of earnings per share for first quarter 2016 because the strike price or conversion rate, as applicable, of such securities was greater than the average market price of our common stock for such period 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 March 31, 2017 2016 Restricted stock units and stock options 29 173 Convertible securities — 7,724 Warrants — 8,496 Total 29 16,393 Convertible Notes During periods in which the average market price of the Company's common stock is above the applicable conversion price of the Company's 1.50% Senior Convertible Notes due 2020 (for purposes of this discussion, the "Convertible Notes")($72.37 per share as of March 31, 2017) or above the strike price of our outstanding warrants ($88.46 per share as of March 31, 2017), the impact of conversion or exercise, as applicable, would be dilutive and such dilutive effect is reflected in diluted earnings per share. As a result, in periods where the average market price of the Company's common stock is above the conversion price or strike price, as applicable, under the treasury stock method, the Company calculates the number of shares issuable under the terms of the Convertible Notes and the warrants based on the average market price of the stock during the period, and includes that number in the total diluted shares outstanding for the period. See Note 7, " Long-Term Debt ," for additional information about the Convertible Notes and warrants.

Litigation and Legal Proceeding

Litigation and Legal Proceedings (Notes)	3 Months Ended
	Mar. 31, 2017
LITIGATION AND LEGAL PROCEEDINGS [Abstract]
Legal Matters and Contingencies [Text Block]	.

Equity Transactions (Notes)

Equity Transactions (Notes)	3 Months Ended
	Mar. 31, 2017
EQUITY TRANSACTIONS: [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	. EQUITY TRANSACTIONS Changes in shareholders’ equity for the three months ended March 31, 2017 and March 31, 2016 were as follows (in thousands): For the Three Months Ended March 31, 2017 2016 Balance beginning of period, December 31 $ 739,709 $ 510,519 Net income attributable to InterDigital, Inc. 33,756 28,071 Unrealized (loss) gain on investments, net (45 ) 252 Cash dividends declared (10,404 ) (6,923 ) Repurchase of common stock — (40,399 ) Exercise of common stock options 82 — Taxes withheld upon vesting of restricted stock units (21,955 ) (3,405 ) Tax benefit from share-based compensation — (46 ) Share-based compensation 5,317 6,643 Total InterDigital, Inc. shareholders’ equity end of period $ 746,460 $ 494,712 Noncontrolling Interest Balance beginning of period, December 31 14,659 11,376 Net loss attributable to noncontrolling interest (978 ) (920 ) Noncontrolling interest 13,681 10,456 Total Equity end of period $ 760,141 $ 505,168 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. We did not repurchase any shares of common stock in first quarter 2017. 2014 Repurchase Program # of Shares Value 2016 1,304 $ 64,685 2015 1,836 96,410 2014 3,554 152,625 Total 6,694 $ 313,720 Dividends Cash dividends on outstanding common stock declared in 2017 and 2016 were as follows (in thousands, except per share data): 2017 Per Share Total Cumulative by Fiscal Year First quarter $ 0.30 $ 10,404 $ 10,404 $ 0.30 $ 10,404 2016 Per Share Total Cumulative by Fiscal Year First quarter $ 0.20 $ 6,923 $ 6,923 Second quarter 0.20 6,861 13,784 Third quarter 0.30 10,285 24,069 Fourth quarter 0.30 10,290 34,359 $ 1.00 $ 34,359 In September 2016, we announced that our Board of Directors had approved an increase in the Company’s quarterly cash dividend, to $0.30 per share. We currently expect to continue to pay dividends comparable to our quarterly $0.30 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 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)	3 Months Ended
	Mar. 31, 2017
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]	. 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 March 31, 2017 and December 31, 2016 , four licensees comprised 95% and 91% of our net accounts receivable balance, respectively. 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 March 31, 2017 and December 31, 2016 (in thousands): Fair Value as of March 31, 2017 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 119,347 $ — $ — $ 119,347 Commercial paper (b) — 195,480 — 195,480 U.S. government securities — 342,598 — 342,598 Corporate bonds, asset backed and other securities — 228,715 — 228,715 $ 119,347 $ 766,793 $ — $ 886,140 ______________________________ (a) Included within cash and cash equivalents. (b) Includes $19.7 million of commercial paper that is included within cash and cash equivalents. Fair Value as of December 31, 2016 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 404,074 $ — $ — $ 404,074 Commercial paper — 113,490 — 113,490 U.S. government securities — 224,330 — 224,330 Corporate bonds, asset backed and other securities — 210,867 — 210,867 $ 404,074 $ 548,687 $ — $ 952,761 ______________________________ (a) 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 March 31, 2017 and December 31, 2016 are as follows (in thousands): March 31, 2017 December 31, 2016 Principal Amount Carrying Value Fair Value Principal Amount Carrying Fair Value Total Long-Term Debt $ 316,000 $ 275,222 $ 411,394 $ 316,000 $ 272,021 $ 428,575 The aggregate fair value of the principal amount of the long-term debt (Level 2 Notes as defined in Note 7 “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)	3 Months Ended
	Mar. 31, 2017
Long-term Debt, Unclassified [Abstract]
Long-term Debt [Text Block]	LONG-TERM 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, including on any date during any calendar quarter (and only during such calendar quarter) if the closing sale price of our common stock was more than 130% of the applicable conversion price (approximately $94.08 based on the current conversion price) on each applicable trading day for at least 20 trading days in the period of the 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter. 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 2020 Notes as of March 31, 2017 and December 31, 2016 (in thousands): March 31, 2017 December 31, 2016 Principal $ 316,000 $ 316,000 Less: Unamortized interest discount (36,725 ) (39,578 ) Deferred financing costs (4,053 ) (4,401 ) Net carrying amount of 2020 Notes $ 275,222 $ 272,021 The following table presents the amount of interest cost recognized for the three months ended March 31, 2017 and March 31, 2016 relating to the contractual interest coupon, accretion of the debt discount, and the amortization of financing costs (in thousands): For the Three Months Ended March 31, 2017 2016 Contractual coupon interest $ 1,185 $ 2,623 Accretion of debt discount 2,854 5,193 Amortization of deferred financing costs 347 673 Total $ 4,386 $ 8,489

Variable Interest Entities Vari

Variable Interest Entities Variable Interest Entities (Notes)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 , the combined book values of the assets and liabilities associated with these variable interest entities included in our Condensed Consolidated Balance Sheet were $27.8 million and $5.2 million , respectively. Assets included $19.3 million of cash and cash equivalents and $8.5 million of patents, net. As of December 31, 2016 , the combined book values of the assets and liabilities associated with these variable interest entities included in our Condensed Consolidated Balance Sheet were $28.9 million and $2.3 million , respectively. Assets included $20.3 million of cash and cash equivalents and $8.0 million of patents, net. The impact of consolidating these variable interest entities on our Condensed Consolidated Statements of Income was not significant. Convida Wireless In September 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 March 31, 2017 and 2016 , we have allocated approximately $1.0 million and $0.9 million , respectively, of Convida Wireless' net loss to noncontrolling interests held by other parties. Signal Trust for Wireless Innovation During 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)	3 Months Ended
	Mar. 31, 2017
NET INCOME PER SHARE: [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	For the Three Months Ended March 31, 2017 2016 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 33,756 $ 33,756 $ 28,071 $ 28,071 Denominator: Weighted-average shares outstanding: Basic 34,370 34,370 35,045 35,045 Dilutive effect of stock options, RSUs, convertible securities and warrants 1,850 332 Weighted-average shares outstanding: Diluted 36,220 35,377 Earnings Per Share: Net income: Basic $ 0.98 $ 0.98 $ 0.80 $ 0.80 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.05 ) (0.01 ) Net income: Diluted $ 0.93 $ 0.79 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 March 31, 2017 2016 Basic Diluted Basic Diluted Numerator: Net income applicable to InterDigital, Inc. $ 33,756 $ 33,756 $ 28,071 $ 28,071 Denominator: Weighted-average shares outstanding: Basic 34,370 34,370 35,045 35,045 Dilutive effect of stock options, RSUs, convertible securities and warrants 1,850 332 Weighted-average shares outstanding: Diluted 36,220 35,377 Earnings Per Share: Net income: Basic $ 0.98 $ 0.98 $ 0.80 $ 0.80 Dilutive effect of stock options, RSUs, convertible securities and warrants (0.05 ) (0.01 ) Net income: Diluted $ 0.93 $ 0.79 Certain shares of common stock issuable upon the exercise or conversion of certain securities have been excluded from our computation of earnings per share for first quarter 2016 because the strike price or conversion rate, as applicable, of such securities was greater than the average market price of our common stock for such period 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 March 31, 2017 2016 Restricted stock units and stock options 29 173 Convertible securities — 7,724 Warrants — 8,496 Total 29 16,393 Convertible Notes During periods in which the average market price of the Company's common stock is above the applicable conversion price of the Company's 1.50% Senior Convertible Notes due 2020 (for purposes of this discussion, the "Convertible Notes")($72.37 per share as of March 31, 2017) or above the strike price of our outstanding warrants ($88.46 per share as of March 31, 2017), the impact of conversion or exercise, as applicable, would be dilutive and such dilutive effect is reflected in diluted earnings per share. As a result, in periods where the average market price of the Company's common stock is above the conversion price or strike price, as applicable, under the treasury stock method, the Company calculates the number of shares issuable under the terms of the Convertible Notes and the warrants based on the average market price of the stock during the period, and includes that number in the total diluted shares outstanding for the period. See Note 7, " Long-Term Debt ," for additional information about the Convertible Notes and warrants.

Equity Transactions Shareholder

Equity Transactions Shareholders Equity Rollforward (Tables)	3 Months Ended
	Mar. 31, 2017
EQUITY TRANSACTIONS: [Abstract]
Schedule of Stockholders Equity [Table Text Block]	Changes in shareholders’ equity for the three months ended March 31, 2017 and March 31, 2016 were as follows (in thousands): For the Three Months Ended March 31, 2017 2016 Balance beginning of period, December 31 $ 739,709 $ 510,519 Net income attributable to InterDigital, Inc. 33,756 28,071 Unrealized (loss) gain on investments, net (45 ) 252 Cash dividends declared (10,404 ) (6,923 ) Repurchase of common stock — (40,399 ) Exercise of common stock options 82 — Taxes withheld upon vesting of restricted stock units (21,955 ) (3,405 ) Tax benefit from share-based compensation — (46 ) Share-based compensation 5,317 6,643 Total InterDigital, Inc. shareholders’ equity end of period $ 746,460 $ 494,712 Noncontrolling Interest Balance beginning of period, December 31 14,659 11,376 Net loss attributable to noncontrolling interest (978 ) (920 ) Noncontrolling interest 13,681 10,456 Total Equity end of period $ 760,141 $ 505,168

Concentration of Credit Risk 16

Concentration of Credit Risk and Fair Value of Financial Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 and December 31, 2016 (in thousands): Fair Value as of March 31, 2017 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 119,347 $ — $ — $ 119,347 Commercial paper (b) — 195,480 — 195,480 U.S. government securities — 342,598 — 342,598 Corporate bonds, asset backed and other securities — 228,715 — 228,715 $ 119,347 $ 766,793 $ — $ 886,140 ______________________________ (a) Included within cash and cash equivalents. (b) Includes $19.7 million of commercial paper that is included within cash and cash equivalents. Fair Value as of December 31, 2016 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 404,074 $ — $ — $ 404,074 Commercial paper — 113,490 — 113,490 U.S. government securities — 224,330 — 224,330 Corporate bonds, asset backed and other securities — 210,867 — 210,867 $ 404,074 $ 548,687 $ — $ 952,761 ______________________________ (a) Included within cash and cash equivalents.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2017
Long-term Debt, Unclassified [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	The following table reflects the carrying value of the 2020 Notes as of March 31, 2017 and December 31, 2016 (in thousands): March 31, 2017 December 31, 2016 Principal $ 316,000 $ 316,000 Less: Unamortized interest discount (36,725 ) (39,578 ) Deferred financing costs (4,053 ) (4,401 ) Net carrying amount of 2020 Notes $ 275,222 $ 272,021 The following table presents the amount of interest cost recognized for the three months ended March 31, 2017 and March 31, 2016 relating to the contractual interest coupon, accretion of the debt discount, and the amortization of financing costs (in thousands): For the Three Months Ended March 31, 2017 2016 Contractual coupon interest $ 1,185 $ 2,623 Accretion of debt discount 2,854 5,193 Amortization of deferred financing costs 347 673 Total $ 4,386 $ 8,489

Significant Agreements Signific

Significant Agreements Significant Agreements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenues	$ 94,530	$ 107,764
Patent licensing royalties	$ 89,226	$ 106,954

Income Taxes (Details)

Income Taxes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Income Tax Contingency [Line Items]
Effective Income Tax Rate, Continuing Operations	5.20%	(34.10%)
Estimated Annual Effective Tax Rate	32.60%
Income Tax Expense (Benefit)	$ (1,624,000)	$ 14,068,000
Income Taxes Paid	2,990,000	14,423,000
Taxes payable	39,190,000		$ 10,660,000
Domestic Tax Authority [Member]
Income Tax Contingency [Line Items]
Income Tax Expense (Benefit)	11,800,000
Foreign Country [Member]
Income Tax Contingency [Line Items]
Income Taxes Paid	$ 3,000,000	$ 14,300,000

Net Income Per Share (Details)

Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share, Basic & Dilutive, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Attributable to Parent	$ 33,756,000	$ 28,071,000
Weighted Average Number of Shares Outstanding, Basic	34,370	35,045
Weighted Average Number Diluted Shares Outstanding Adjustment	1,850	332
Weighted Average Number of Shares Outstanding, Diluted	36,220	35,377
Dilutive Securities, Efffect on Basic Earnings Per Share [2]	$ (0.05)	$ 0
Net Incme Per Common Share, Basic	$ 0.98	$ 0.80
Net Income Per Common Share, Diluted	$ 0.93	$ 0.79
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	0	7,724
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	0	8,496

Net Income Per Share Antidiluti

Net Income Per Share Antidilutive Securities Excluded from Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
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	0	7,724
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	8,496
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	29	173

Litigation and Legal Proceedi22

Litigation and Legal Proceedings (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Legal Gain (Loss) Contingencies [Line Items]
Deferred Revenue, Current	$ 328,324	$ 360,192

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			30 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Mar. 09, 2015	Mar. 05, 2015	Jun. 30, 2014
Class of Stock [Line Items]
CASH DIVIDEND DECLARED PER COMMON SHARE	$ 0.30	$ 0.30	$ 0.30	$ 0.20	$ 0.20					$ 1
Noncontrolling Interest in Variable Interest Entity	$ 13,681	$ 14,659			$ 10,456					$ 14,659	$ 11,376		$ 14,659
Net Income (Loss) Attributable to Noncontrolling Interest	(978)				(920)
Equity Transactions [Roll Forward]
Balance as of December 31, 2011	739,709			$ 494,712	510,519			$ 510,519	$ 510,519	510,519
NET INCOME	33,756				28,071
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(45)				252
Adjustments Related to Tax Withholding for Share-based Compensation	(21,955)				(3,405)
Balance as of September 30, 2012	746,460	739,709			494,712					739,709	$ 510,519		739,709
Dividends, Common Stock, Cash	10,404	10,290	$ 10,285	$ 6,861	6,923			$ 13,784	$ 24,069	34,359
Proceeds from Stock Options Exercised	82				0
Share-based Compensation	5,317				6,643
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	760,141	$ 754,368			$ 505,168					$ 754,368			$ 754,368
Convertible Debt [Member] | Equity [Member]
Equity Transactions [Roll Forward]
Class of Warrant or Right, Outstanding														600	3,800
Warrant Option Strike Price															$ 88.46
Note Warrant2 [Member]
Equity Transactions [Roll Forward]
Proceeds from Issuance of Warrants							$ 37,300
Class of Warrant or Right [Domain]
Equity Transactions [Roll Forward]
Proceeds from Issuance of Warrants							$ 5,600
2014 Repurchase Program [Domain]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 400,000															$ 300,000
Treasury Stock Acquired, Repurchase Authorization						100
Stock Repurchased During Period, Shares										1,304	1,836	3,554	6,694
Accelerated Share Repurchases, Initial Price Paid Per Share							$ 53.61
Equity Transactions [Roll Forward]
Stock Repurchased During Period, Value										$ 64,685	$ 96,410	$ 152,625	$ 313,720
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			30 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2016	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Jun. 30, 2014
Class of Stock [Line Items]
CASH DIVIDEND DECLARED PER COMMON SHARE	$ 0.30	$ 0.30	$ 0.30	$ 0.20	$ 0.20				$ 1
Dividends, Common Stock, Cash	$ 10,404	$ 10,290	$ 10,285	$ 6,861	$ 6,923		$ 13,784	$ 24,069	$ 34,359
Stockholders' Equity Attributable to Parent	746,460	739,709			494,712				739,709	$ 510,519		$ 739,709
Adjustments Related to Tax Withholding for Share-based Compensation	21,955				3,405
Tax benefit from share-based compensation	0				(46)
Net Income (Loss) Attributable to Parent	33,756				28,071
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(45)				252
Cash dividends declared	(10,404)				(6,923)
Repurchase of common stock	0				(40,399)
Proceeds from Stock Options Exercised	82				0
Share-based Compensation	5,317				6,643
Net Income (Loss) Attributable to Noncontrolling Interest	(978)				(920)
Noncontrolling Interest in Variable Interest Entity	13,681	14,659			10,456				14,659	$ 11,376		14,659
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	760,141	$ 754,368			$ 505,168				$ 754,368			$ 754,368
Class of Warrant or Right [Domain]
Class of Stock [Line Items]
Proceeds from Issuance of Warrants						$ 5,600
2014 Repurchase Program [Domain]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 400,000												$ 300,000
Stock Repurchased During Period, Shares									1,304	1,836	3,554	6,694
Stock Repurchased During Period, Value									$ 64,685	$ 96,410	$ 152,625	$ 313,720

Equity Transactions Adjustments

Equity Transactions Adjustments for Tax Withholding (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Class of Stock [Line Items]
Adjustments Related to Tax Withholding for Share-based Compensation	$ 21,955	$ 3,405

Concentration of Credit Risk 26

Concentration of Credit Risk and Fair Value of Financial Assets and Liabilities (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2015
Concentration Risk [Line Items]
Concentration Risk, Percentage	95.00%	91.00%
Concentration Risk, Customer	four

Concentration of Credit Risk 27

Concentration of Credit Risk and Fair Value of Financial Assets and Liabilities Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes	$ 275,222	$ 272,021
Assets, Fair Value Disclosure, Recurring	886,140	952,761
Commercial Paper	19,700
LONG-TERM DEBT	275,222	272,021
Long-term Debt, Fair Value	411,394	428,575
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	119,347	404,074
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	195,480	113,490
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	342,598	224,330
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	228,715	210,867
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	119,347	404,074
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	119,347	404,074
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	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	766,793	548,687
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	195,480	113,490
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	228,715	210,867
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 Thousands	3 Months Ended			12 Months Ended			30 Months Ended
	Mar. 31, 2017USD ($)	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2016USD ($)shares	Dec. 31, 2015USD ($)shares	Dec. 31, 2014USD ($)shares	Dec. 31, 2016USD ($)shares	Mar. 11, 2015USD ($)$ / shares	Mar. 09, 2015shares	Mar. 05, 2015USD ($)$ / sharesshares	Jun. 30, 2014USD ($)
Debt Instrument [Line Items]
Interest Expense, Debt, Excluding Amortization		$ 2,623,000
Accretion of Discount		5,193,000
Amortization of Financing Costs		673,000
Senior Notes	$ 275,222,000			$ 272,021,000			$ 272,021,000
Debt Instrument, Interest Rate, Effective Percentage								5.89%
Interest Expense		$ 8,489,000
Long-term Debt, Fair Value	411,394,000			428,575,000			428,575,000
Note Warrant2 [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Warrants			$ 37,300,000
Class of Warrant or Right [Domain]
Debt Instrument [Line Items]
Proceeds from Issuance of Warrants			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
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
Convertible Note Overallotment [Member]
Debt Instrument [Line Items]
Senior Notes										$ 41,000,000
Convertible Debt [Member]
Debt Instrument [Line Items]
Senior Notes	316,000,000			316,000,000			316,000,000
Payments of Debt Issuance Costs			(9,300,000)
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
Accretion of Discount	2,854,000
Amortization of Financing Costs	347,000
Senior Notes	275,222,000			272,021,000			272,021,000
Debt Instrument, Unamortized Discount	(36,725,000)			(39,578,000)			(39,578,000)
Deferred financing costs	(4,053,000)			$ (4,401,000)			$ (4,401,000)
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	4,386,000
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
Balance Sheet by Location [Domain] | Convertible Debt [Member]
Debt Instrument [Line Items]
Senior Notes								$ 256,700,000
Other Long-term Liabilities [Member] | Convertible Debt [Member]
Debt Instrument [Line Items]
Payments of Debt Issuance Costs			$ (7,000,000)
Equity [Member] | Convertible Debt [Member]
Debt Instrument [Line Items]
Senior Notes								59,300,000
Senior Convertible Notes [Equity net of tax]								$ 38,600,000
Class of Warrant or Right, Outstanding | shares									600	3,800
Warrant Option Strike Price | $ / shares										$ 88.46
2014 Repurchase Program [Domain]
Debt Instrument [Line Items]
Stock Repurchase Program, Authorized Amount	$ 400,000,000										$ 300,000,000
Stock Repurchased During Period, Shares | shares				1,304	1,836	3,554	6,694
Accelerated Share Repurchases, Initial Price Paid Per Share | $ / shares			$ 53.61
Stock Repurchased During Period, Value				$ 64,685,000	$ 96,410,000	$ 152,625,000	$ 313,720,000
2014 Repurchase Program [Domain] | Repurchases related to 2020 Notes [Member]
Debt Instrument [Line Items]
Stock Repurchased During Period, Shares | shares			800

Variable Interest Entities (Det

Variable Interest Entities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 27,800		$ 28,900
Net Income (Loss) Attributable to Noncontrolling Interest	(978)	$ (920)
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	5,200		2,300
Cash and Cash Equivalents [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	19,300		20,300
Patents [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 8,500		$ 8,000

Deferred Revenue (Details)

Deferred Revenue (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Deferred Revenue, Current	$ 328,324	$ 360,192
LONG-TERM DEFERRED REVENUE	$ 398,960	$ 261,013