LifeLock (LOCK) 10-Q 9 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 28, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Trading Symbol	LOCK
Entity Registrant Name	LIFELOCK, INC.
Entity Central Index Key	1,383,871
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		94,146,117

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 34,806	$ 50,239
Marketable securities	131,298	196,474
Trade and other receivables, net	17,080	13,974
Prepaid expenses and other current assets	9,168	12,303
Total current assets	192,352	272,990
Property and equipment, net	44,665	30,485
Goodwill	172,087	172,087
Intangible assets, net	21,830	30,174
Deferred tax assets, net	81,164	77,363
Other non-current assets	13,627	9,710
Total assets	525,725	592,809
Current liabilities:
Accounts payable	8,645	24,747
Accrued expenses and other liabilities	57,362	76,226
Deferred revenue	189,034	166,403
Total current liabilities	255,041	267,376
Other non-current liabilities	20,113	7,367
Total liabilities	275,154	274,743
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value, 300,000,000 authorized at September 30, 2016 and December 31, 2015; 100,850,257 and 95,877,947 shares issued and 93,647,679 and 95,832,238 outstanding at September 30, 2016 and December 31, 2015, respectively	101	96
Preferred stock, $0.001 par value, 10,000,000 shares authorized and no shares issued and outstanding at September 30, 2016 and December 31, 2015	0	0
Treasury stock, at cost; 7,202,578 shares and no shares held at September 30, 2016 and December 31, 2015, respectively	(74,974)	0
Additional paid-in capital	544,009	532,388
Accumulated other comprehensive loss	(118)	(361)
Accumulated deficit	(218,447)	(214,057)
Total stockholders’ equity	250,571	318,066
Total liabilities and stockholders’ equity	$ 525,725	$ 592,809

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Common stock par value (in dollars per share)	$ 0.001	$ 0.001
Common stock shares authorized (in shares)	300,000,000	300,000,000
Common stock shares issued (in shares)	100,850,257	95,877,947
Common stock shares outstanding (in shares)	93,647,679	95,832,238
Preferred stock par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Treasury stock, shares held (in shares)	7,202,578	0

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue:
External customers	$ 170,294	$ 151,952	$ 494,006	$ 431,317
Total revenue	170,294	151,952	494,006	431,317
Cost of services	34,782	33,988	118,410	103,470
Gross profit	135,512	117,964	375,596	327,847
Costs and expenses:
Sales and marketing	68,416	62,850	240,492	209,470
Technology and development	20,379	19,396	61,509	52,928
General and administrative	21,882	120,984	73,700	160,815
Amortization of acquired intangible assets	1,982	2,084	8,344	6,251
Total costs and expenses	112,659	205,314	384,045	429,464
Income (loss) from operations	22,853	(87,350)	(8,449)	(101,617)
Other income (expense):
Interest expense	(111)	(89)	(403)	(265)
Interest income	272	219	875	498
Other, net	(85)	0	(214)	(183)
Total other income	76	130	258	50
Income (loss) before income taxes	22,929	(87,220)	(8,191)	(101,567)
Income tax expense (benefit)	8,527	(22,075)	(3,801)	(27,784)
Net income (loss)	$ 14,402	$ (65,145)	$ (4,390)	$ (73,783)
Net income (loss) per share attributable to common stockholders:
Earnings per share, basic (in dollars per share)	$ 0.16	$ (0.68)	$ (0.05)	$ (0.78)
Earnings per share, diluted (in dollars per share)	$ 0.15	$ (0.68)	$ (0.05)	$ (0.78)
Weighted-average common shares outstanding used in computing net income (loss) per share attributable to common stockholders:
Weighted average number of shares outstanding, basic (in shares)	92,034,474	95,340,136	93,052,376	94,659,931
Weighted average number of shares outstanding, diluted (in shares)	97,321,303	95,340,136	93,052,376	94,659,931
Consumer
Revenue:
External customers	$ 161,671	$ 144,648	$ 470,260	$ 411,178
Costs and expenses:
Income (loss) from operations	26,636	(84,249)	4,881	(90,456)
Enterprise
Revenue:
External customers	8,623	7,304	23,746	20,139
Costs and expenses:
Income (loss) from operations	$ (3,783)	$ (3,101)	$ (13,330)	$ (11,161)

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 14,402	$ (65,145)	$ (4,390)	$ (73,783)
Other comprehensive gain (loss), net of tax
Unrealized gain (loss) on marketable securities	(89)	117	243	39
Comprehensive income (loss)	$ 14,313	$ (65,028)	$ (4,147)	$ (73,744)

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities
Net loss	$ (4,390)	$ (73,783)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	17,082	13,292
Stock-based compensation	25,509	20,287
Provision for doubtful accounts	352	150
Amortization of premiums on marketable securities	1,521	2,310
Deferred income tax benefit	(3,801)	(27,784)
Other	343	250
Change in operating assets and liabilities:
Trade and other receivables	(3,956)	(3,469)
Prepaid expenses and other current assets	3,136	(1,022)
Other non-current assets	167	357
Accounts payable	(14,622)	1,548
Accrued expenses and other liabilities	(18,120)	117,693
Deferred revenue	22,631	25,629
Other non-current liabilities	408	265
Net cash provided by operating activities	26,260	75,723
Investing activities
Acquisition of business, net of cash acquired	0	(12,797)
Acquisition of property and equipment, including capitalization of internal use software	(11,299)	(9,057)
Purchases of marketable securities	(83,896)	(191,846)
Sales and maturities of marketable securities	148,298	122,936
Premiums paid for company-owned life insurance policies	(4,337)	(4,337)
Net cash provided by (used in) investing activities	48,766	(95,101)
Financing activities
Proceeds from stock-based compensation plans	15,780	10,144
Payments related to the repurchases of common stock	(100,000)	0
Payments for employee tax withholdings related to restricted stock units and awards	(6,239)	(1,793)
Net cash provided by (used in) financing activities	(90,459)	8,351
Net decrease in cash and cash equivalents	(15,433)	(11,027)
Cash and cash equivalents at beginning of period	50,239	146,569
Cash and cash equivalents at end of period	34,806	135,542
Supplemental cash flow information:
Building in progress - leased facility acquired under financing obligation	$ 12,338	$ 0

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP), and applicable Securities and Exchange Commission (SEC), rules and regulations regarding interim financial reporting. Certain information and note disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2015 , or fiscal 2015 Form 10-K. The condensed consolidated balance sheet as of December 31, 2015 included herein was derived from the audited financial statements as of that date, but does not include all disclosures including notes required by U.S. GAAP. The accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, and cash flows for the interim periods, but are not necessarily indicative of the anticipated results of operations for the entire year ending December 31, 2016 or any future period. Basis of Consolidation The condensed consolidated financial statements include our accounts and those of our wholly and indirectly owned subsidiaries. We eliminate all intercompany balances and transactions, including intercompany profits, in consolidation. Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires us to make certain estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We continually evaluate our estimates, including those related to the allocation of the purchase price associated with acquisitions; the carrying value of long-lived assets; the amortization period of long-lived assets; the carrying value, capitalization, and amortization of software and website development costs; the carrying value of goodwill and other intangible assets; the amortization period of intangible assets; the provision for income taxes and related deferred tax accounts, and realizability of deferred tax assets; certain accrued expenses; contingencies, litigation, and related legal accruals; and the value attributed to employee stock options and other stock-based awards. We base our estimates on historical experience, current business factors, and various other assumptions that we believe are necessary to consider to form a basis for making judgments. Actual results could be materially different from these estimates.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Leases We lease office space and data centers in various locations under operating leases with original lease periods up to 11 years. Rent expense is recognized on a straight-line basis from the day we take possession of the premises through the end of the lease term. Rent abatements and rent escalation provisions are considered in determining the straight-line rent expense with any difference between rent expense and rent payable recorded as an increase or decrease in deferred rent. Tenant improvement allowances are recorded as leasehold improvements within property and equipment and within deferred rent. We record assets and liabilities for the present value of estimated construction costs incurred under build-to-suit lease arrangements to the extent we are involved in the construction of structural improvements or take substantially all of the construction period risk prior to commencement of a lease. Ground rents are imputed and accrued for during the construction period, and are recorded in rent expense. At completion of a construction project, we perform an analysis to determine if the transfer to the owner/lessor meets the requirements for sale-leaseback treatment. If we maintain significant continuing involvement, we will continue to carry the construction costs and corresponding financing obligation on our balance sheet until the involvement or the term of the lease ends. If it is determined that we will not maintain significant continuing involvement, we record a sale of the premises back to the owner/lessor, and remove the construction costs and financing obligation from our consolidated balance sheet. There have been no other material changes to our significant accounting policies from those disclosed in our fiscal 2015 Form 10-K. Recently Issued Accounting Standards In May 2014, the FASB, issued ASU 2014-09, Revenue from Contracts with Customers, which provides guidance for revenue recognition. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under today’s guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price, and allocating the transaction price to each separate performance obligation. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers: Deferral of the Effective Date , which defers the effective date of ASU 2014-09 for all entities for one year. Consequently, the guidance provided in ASU 2014-09 will be effective for us in the first quarter of our fiscal year ending December 31, 2018. Early adoption is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The guidance permits the use of either the retrospective or cumulative effect transition method. In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations , which clarifies the implementation guidance on principal versus agent considerations. ASU 2016-08 is effective the same date as ASU 2014-09, Revenue from Contracts with Customers . In April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing , which clarifies the guidance related to identifying performance obligations and licensing implementation guidance. ASU 2016-10 reduces the cost and complexity of applying certain aspects of the guidance both at implementation and on an ongoing basis. The effective date for ASU 2016-10 is the same as ASU 2014-09. We are currently in the process of evaluating the impact of the adoption of this guidance on our consolidated financial statements and have not yet selected a transition method. In February 2016, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update (ASU) 2016-02, Leases , which requires lessees to recognize the assets and liabilities on their balance sheet for the rights and obligations created by operating leases and will also require disclosures designed to give users of financial statements information on the amount, timing, and uncertainty of cash flows arising from leases. The guidance provided by ASU 2016-02 is effective for annual periods beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the effect of ASU 2016-06 on our consolidated financial statements and do not plan to early adopt this guidance. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718) Improvements to Employee Share-Based Payment Accounting , which require all income tax effects of awards to be recognized in the income statement when the awards vest or are settled, as well as revising guidance around classification of awards as either equity or liabilities, forfeitures and classification on the statement of cash flows. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the effect of ASU 2016-09 on our consolidated financial statements and do not plan to early adopt this guidance. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, which makes changes to how certain cash receipt and cash payments are presented and classified in the cash flow statement. ASU 2016-15 is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The amendments in ASU 2016-15 will be applied using a retrospective transition method for each period presented unless it is impracticable to apply the amendments retrospectively, in which case prospective application would be applied as of the earliest date practicable. Early adoption is permitted. We are currently evaluating the effect of ASU 2016-15 on our consolidated financial statements and do not plan to early adopt this guidance.

Marketable Securities

Marketable Securities	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	Marketable Securities We classify all marketable securities as current regardless of contractual maturity dates because we consider such investments to represent cash available for current operations. As of September 30, 2016 and December 31, 2015 , we did not consider any of our marketable securities to be other-than-temporarily impaired. When evaluating our investments for other-than-temporary impairment, we review factors such as the length of time and extent to which fair value has been below its cost basis, the financial condition of the issuer, our ability and intent to hold the security, and whether it is more likely than not that we will be required to sell the investment before recovery of its cost basis. The following is a summary of marketable securities designated as available-for-sale as of September 30, 2016 : Amortized Gross Gross Estimated (in thousands) Corporate bonds $ 100,964 $ 14 $ (126 ) $ 100,852 Government securities 9,695 10 — 9,705 Commercial paper 8,187 — — 8,187 Agency securities 7,255 3 — 7,258 Municipal bonds 4,050 — (2 ) 4,048 Certificates of deposit 1,248 — — 1,248 Total marketable securities $ 131,399 $ 27 $ (128 ) $ 131,298 The following is a summary of amortized cost and estimated fair value of marketable securities as of September 30, 2016 by maturity: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) Due in one year or less $ 121,461 $ 27 $ (94 ) $ 121,394 Due after one year 9,938 — (34 ) $ 9,904 Total marketable securities $ 131,399 $ 27 $ (128 ) $ 131,298 The following is a summary of marketable securities designated as available-for-sale as of December 31, 2015 : Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) Corporate bonds $ 125,132 $ 1 $ (304 ) $ 124,829 Commercial paper 37,236 — — 37,236 Municipal bonds 16,228 2 (6 ) 16,224 Government securities 8,704 1 (17 ) 8,688 Agency securities 7,273 — (20 ) 7,253 Certificates of deposit 2,244 — — 2,244 Total marketable securities $ 196,817 $ 4 $ (347 ) $ 196,474 The following is a summary of amortized cost and estimated fair value of marketable securities as of December 31, 2015 by maturity: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) Due in one year or less $ 164,147 $ 2 $ (221 ) $ 163,928 Due after one year 32,670 2 (126 ) 32,546 Total marketable securities $ 196,817 $ 4 $ (347 ) $ 196,474

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements As of September 30, 2016 and December 31, 2015 , the fair value of our financial assets was as follows: Level 1 Level 2 Level 3 Total (in thousands) September 30, 2016 Assets: Money market funds (1) $ 14,733 $ — $ — $ 14,733 Corporate bonds (2) — 100,852 — 100,852 Government securities (2) — 9,705 — 9,705 Commercial paper (2) — 8,187 — 8,187 Agency securities (2) — 7,258 — 7,258 Municipal bonds (2) — 4,048 — 4,048 Certificates of deposit (2) — 1,248 — 1,248 Total assets measured at fair value $ 14,733 $ 131,298 $ — $ 146,031 December 31, 2015 Assets: Money market funds (1) $ 18,114 $ — $ — $ 18,114 Corporate bonds (2) — 124,829 — 124,829 Commercial paper (3) — 47,294 — 47,294 Municipal bonds (2) — 16,223 — 16,223 Government securities (2) — 8,688 — 8,688 Agency securities (2) — 7,253 — 7,253 Certificates of deposit (2) — 2,244 — 2,244 Total assets measured at fair value $ 18,114 $ 206,531 $ — $ 224,645 (1) Classified in cash and cash equivalents (2) Classified in marketable securities. (3) Includes commercial paper with maturities of three months or less at time of purchase of $10.1 million classified in cash and cash equivalents and commercial paper with maturities of greater than three months of $37.2 million classified in marketable securities.

Financing Arrangements

Financing Arrangements	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Financing Arrangements	Financing Arrangements There have been no changes in our Credit Agreement and related documents with Bank of America, which we refer to as our Senior Credit Facility, from the disclosure in our fiscal 2015 Form 10-K. At September 30, 2016 and December 31, 2015 we were in compliance with all the covenants of the Senior Credit Facility. As of September 30, 2016 , we had outstanding letters of credit in the amount of $1.3 million .

Leases

Leases	9 Months Ended
	Sep. 30, 2016
Leases [Abstract]
Leases	Leases In April 2016, we entered into a lease agreement for approximately 60,000 rentable square feet of office space located in Mountain View, CA. We rented the total office space available in the building, which is currently under construction. As a result of our involvement during the construction period, we are deemed to be the owner of the construction project for accounting purposes. Accordingly, we recorded a $12.3 million construction in process asset in property and equipment, net, representing the total fair value of the building paid by the lessor including estimated construction period costs to date and a corresponding noncurrent financing obligation liability in our September 30, 2016 condensed consolidated balance sheet. We have also recorded imputed ground rent expense of $0.6 million for the three- and nine -months ended September 30, 2016 . Construction is expected to be completed in the first quarter of 2017 at which point we will evaluate whether or not we meet the requirements for sale-leaseback treatment. If we do meet the requirements for sale-leaseback treatment upon completion of construction, we will record the sale of the premises back to the owner/lessor and remove the construction in process asset and corresponding noncurrent financing obligation liability from our consolidated balance sheet and the lease will be accounted for as an operating lease under which we expect to recognize rent expense of approximately $4.0 million per year during the term of the lease. If we are unable to meet the requirements for sale-leaseback treatment, the lease will be treated as a financing obligation and we will continue to carry the value of the building and construction costs on our balance sheet. Rent payments will be treated as principal and interest payments on the financing obligation, with an amount recorded as estimated ground lease expense each period. The capitalized costs of the building will be depreciated over an estimated useful life of 30 years. The following summarizes the future minimum lease payments for all outstanding lease agreements as of September 30, 2016 : Financing Obligation, Building in Operating Progress - Leases Leased Facility Remaining 2016 $ 1,959 $ — 2017 7,429 1,717 2018 6,751 4,222 2019 6,355 4,349 2020 4,773 4,480 Thereafter 14,151 27,605 Gross future minimum lease payments 41,418 42,373 Less: expected proceeds from sublease rentals (776 ) — Net future minimum lease payments $ 40,642 $ 42,373 Rent expense for the three- and nine -months ended September 30, 2016 was $2.4 million and $6.4 million , respectively, net of sublease income. Rent expense for the three- and nine -months ended September 30, 2015 was $1.5 million and $4.3 million , respectively.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity Stock Repurchases In November 2015, we announced that our board of directors approved the repurchase of up to $100 million of our common stock, representing approximately 7% of our outstanding common stock. The repurchase program was completed in the second quarter of 2016, with the final settlement of shares completed in the third quarter 2016. Repurchases under the program were made through open market and privately negotiated transactions as described below. In February 2016, we entered into an issuer forward repurchase transaction confirmation (the ASR Agreement) with Bank of America, N.A. to repurchase common stock as part of the approved $100 million share repurchase program. Under the ASR Agreement, we paid Bank of America, N.A. $50 million and received an initial delivery of 4.2 million shares of common stock. The total number of shares purchased was determined based on the volume weighted average price of our common stock during the term of the ASR Agreement. In the second quarter 2016, Bank of America, N.A. delivered approximately 76,000 shares for the final settlement of the ASR Agreement. We accounted for the ASR Agreement as two separate transactions: (i) approximately 4.2 million shares of common stock initially delivered, which represented approximately $42.5 million , was accounted for as a treasury stock transaction and (ii) the remaining $7.5 million unsettled portion of the ASR Agreement was determined to be a forward contract indexed to our common stock. The initial repurchase of shares resulted in an immediate reduction of the outstanding shares used to calculate the weighted-average common shares outstanding for basic and diluted net income (loss) per share on the delivery date. We determined that the forward contract indexed to our common stock met all of the applicable criteria for equity classification, and therefore the contract was not accounted for as a derivative. We recorded the $7.5 million unsettled portion of the ASR Agreement, which represents the implied value of the forward contract, in additional paid-in capital on the condensed consolidated balance sheet upon execution of the ASR Agreement. Upon the final delivery of shares of the ASR Agreement, the forward contract was reclassified from additional paid-in capital to treasury stock for the value of the additional shares received, which amounted to approximately $1.0 million . In May 2016, we entered into a second issuer forward repurchase transaction confirmation (the Second ASR Agreement) with Bank of America, N.A. to repurchase common stock as the final part of our approved $100 million share repurchase program. Under the Second ASR Agreement, we paid Bank of America, N.A. approximately $48.1 million and received an initial delivery of 3.5 million shares of common stock. The total number of shares purchased was determined based on the volume weighted average price of our common stock during the term of the Second ASR Agreement (the Valuation Period). In July 2016, we returned approximately 0.3 million shares to Merill Lynch, Pierce, Fenner & Smith pursuant to the Second ASR Agreement as a result of the increase in our stock price during the Valuation Period. We accounted for the Second ASR Agreement as two separate transactions: (i) approximately 3.5 million shares of common stock initially delivered, which represented approximately $40.9 million , was accounted for as a treasury stock transaction; and (ii) the remaining $7.2 million unsettled portion of the Second ASR Agreement was determined to be a forward contract indexed to our common stock. The initial repurchase of shares resulted in an immediate reduction of the outstanding shares used to calculate the weighted-average common shares outstanding for basic and diluted net income (loss) per share on the delivery date. We determined that the forward contract indexed to our common stock met all of the applicable criteria for equity classification, and therefore the contract was not accounted for as a derivative. We recorded the $7.2 million unsettled portion of the Second ASR Agreement, which represented the implied value of the forward contract, in additional paid-in capital. Upon final settlement of the Second ASR Agreement in August 2016, the value of the shares delivered to Merill Lynch, Pierce, Fenner & Smith was reclassified to additional paid-in capital from treasury stock for approximately $4.8 million . We were authorized by our board of directors pursuant to the $100 million share repurchase program to repurchase shares of common stock in the open market pursuant to trading plans meeting the requirements of Rule 10b5-1 under the Securities Exchange Act of 1934, (the Exchange Act). During the nine-month period ended September 30, 2016 , we repurchased 0.2 million shares of common stock at an average price of $10.49 per share under such trading plans. In connection with the Second ASR Agreement, we terminated our trading plans. Stock-Based Compensation We issue stock-based awards to our employees in the form of stock options, restricted stock units, and restricted stock. We also have an Employee Stock Purchase Plan, or ESPP. The following table summarizes the components of stock-based compensation expense included in our condensed consolidated statements of operations: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 (in thousands) Cost of services $ 486 $ 449 $ 1,445 $ 1,286 Sales and marketing 1,672 1,238 4,793 3,385 Technology and development 2,574 2,514 7,893 6,226 General and administrative 3,880 3,662 11,378 9,390 Total stock-based compensation $ 8,612 $ 7,863 $ 25,509 $ 20,287 Unrecognized stock-based compensation expenses totaled $78.4 million as of September 30, 2016 , which we expect to recognize over a weighted-average time period of 2.9 years . Stock Warrants During the nine-month period ended September 30, 2016 , warrants to purchase common shares of 2,334,044 were net exercised for a total of 2,210,335 shares. There are no warrants outstanding as of September 30, 2016 .

Net Income (Loss) Per Share

Net Income (Loss) Per Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Net Income (Loss) Per Share	Net Income (Loss) Per Share We compute basic net income (loss) per share using the two-class method required for participating securities. We consider unvested restricted stock to be participating because holders of such shares have non-forfeitable one-for-one dividend rights. The holders of unvested restricted stock do not have a contractual obligation to share in net losses. Basic net income (loss) per share attributable to common stockholders is calculated by dividing net income (loss) attributable to common stockholders by the weighted-average number of common shares outstanding for the period. We compute diluted net income (loss) per share attributable to common stockholders giving effect to all potential dilutive common stock, including awards granted under our equity compensation plans and warrants to acquire common stock. The following table sets forth the computation of basic and diluted net income (loss) per share attributable to common stockholders: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 (in thousands, except share and per share data) Numerator: Net income (loss) $ 14,402 $ (65,145 ) $ (4,390 ) $ (73,783 ) Less: Net income attributable to participating securities (109 ) — — — Net income (loss) attributable to common stockholders $ 14,293 $ (65,145 ) $ (4,390 ) $ (73,783 ) Denominator (basic): Weighted average common shares outstanding 92,034,474 95,340,136 93,052,376 94,659,931 Denominator (diluted): Weighted average common shares outstanding 92,034,474 95,340,136 93,052,376 94,659,931 Dilutive stock options outstanding 3,716,283 — — — Dilutive restricted stock units and awards 1,557,016 — — — Dilutive shares purchased under ESPP 13,530 — — — Net weighted average common shares outstanding 97,321,303 95,340,136 93,052,376 94,659,931 Net income (loss) per share attributable to common stockholders: Basic $ 0.16 $ (0.68 ) $ (0.05 ) $ (0.78 ) Diluted $ 0.15 $ (0.68 ) $ (0.05 ) $ (0.78 ) Potentially dilutive securities, including common equivalent shares in which the exercise price together with other assumed proceeds exceed the average market price of common stock for the applicable period, were not included in the calculation of diluted net income (loss) per share attributable to common stockholders as their impact would be anti-dilutive. The following weighted-average number of outstanding employee stock options, restricted stock units and restricted stock awards, warrants to purchase common stock, and shares purchased under our ESPP were excluded from the computation of diluted net income (loss) per share attributable to common stockholders: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Stock options outstanding 5,006,875 10,328,593 9,268,689 8,876,984 Restricted stock units and restricted stock awards 210,720 2,574,405 2,469,961 1,888,205 Common equivalent shares from stock warrants — 2,168,299 276,937 2,210,012 Shares purchased under ESPP — 54,271 — 67,858 5,217,595 15,125,568 12,015,587 13,043,059

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income taxes for the interim periods presented have been included in the accompanying condensed consolidated financial statements on the basis of an estimated annual effective tax rate. Based on an estimated annual effective tax rate and discrete items, the estimated income tax expense for the three-month period ended September 30, 2016 was $8.5 million and the estimated income tax benefit for the three-month period ended September 30, 2015 was $22.1 million . For the nine -month periods ended September 30, 2016 and 2015 , the estimated income tax benefit was $3.8 million and $27.8 million , respectively. The determination of the interim period income tax provision utilizes the effective tax rate method, which requires us to estimate certain annualized components of the calculation of the income tax provision, including the annual effective tax rate by entity and jurisdiction. Our effective tax rate differed from the U.S. federal and state statutory rate for the three- and -month periods ended September 30, 2016 and 2015 primarily as a result of tax return to provision adjustments which resulted in an income tax benefit of $0.8 million and $0.4 million , respectively. We continually evaluate all positive and negative information to determine if our deferred tax assets are realizable in accordance with ASC 740-10-30, which states that "all available evidence shall be considered in determining whether a valuation allowance for deferred tax assets is needed." In December 2015, the proposed comprehensive settlement agreements resolving outstanding litigation relating to our past marketing representations and information security programs were approved by the Federal Trade Commission, (FTC), the representatives of the Ebarle class action (as described in more detail in Note 11), and were approved by the court presiding over the Ebarle lass action. As a result of the expense of $96 million and $20 million recorded in the years ended December 31, 2015 and 2014, respectively, we have three years of cumulative pretax net losses. We reviewed the cumulative settlement of $116 million and determined that it was non-recurring in nature, not indicative of future performance, and, as such, would not materially affect our ability to generate taxable income in the future. In addition to excluding the impact of the non-recurring settlement amounts, we have seen improving pre-tax book income over the past five years and we are forecasting to continue generating pre-tax book income. As a result of the consideration of the factors discussed above, we believe that it is more likely than not that we will be able to realize our net deferred tax assets not currently subject to a valuation allowance.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting We operate our business and our Chief Operating Decision Maker, or CODM, who is our Chief Executive Officer and President, reviews and assesses our operating performance using two reportable segments: our consumer segment and our enterprise segment. In our consumer segment, we offer proactive identity theft protection services to consumers on an annual or monthly subscription basis. In our enterprise segment, we offer consumer risk management services to our enterprise customers. Revenue and income (loss) from operations by operating segment for the three-month period ended September 30, 2016 and goodwill and total assets by operating segment as of September 30, 2016 were: Consumer Enterprise Eliminations Total (in thousands) Revenue External customers $ 161,671 $ 8,623 $ — $ 170,294 Intersegment revenue — 2,253 (2,253 ) — Income (loss) from operations 26,636 (3,783 ) — 22,853 Goodwill 112,550 59,537 — 172,087 Total assets 434,517 91,979 (771 ) 525,725 Revenue and income (loss) from operations by operating segment for the nine -month period ended September 30, 2016 was as follows: Consumer Enterprise Eliminations Total (in thousands) Revenue External customers $ 470,260 $ 23,746 $ — $ 494,006 Intersegment revenue — 6,866 (6,866 ) — Income (loss) from operations 4,881 (13,330 ) — (8,449 ) Revenue and loss from operations by operating segment for the three-month period ended September 30, 2015 and goodwill and total assets by operating segment as of December 31, 2015 were: Consumer Enterprise Eliminations Total (in thousands) Revenue External customers $ 144,648 $ 7,304 $ — $ 151,952 Intersegment revenue — 2,068 (2,068 ) — Loss from operations (84,249 ) (3,101 ) — (87,350 ) Goodwill 112,550 59,537 — 172,087 Total assets 492,796 100,753 (740 ) 592,809 Revenue and loss from operations by operating segment for the nine -month period ended September 30, 2015 was as follows: Consumer Enterprise Eliminations Total (in thousands) Revenue External customers $ 411,178 $ 20,139 $ — $ 431,317 Intersegment revenue — 6,232 (6,232 ) — Loss from operations (90,456 ) (11,161 ) — (101,617 ) We derive all of our revenue from sales in the United States, and substantially all of our long-lived assets are located in the United States.

Contingencies

Contingencies	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies As part of our consumer services, we offer broad member service support. If a member’s identity has been compromised, our member service team and remediation specialists will assist the member with its resolution. This includes our $1 million service guarantee, which is backed by an identity theft insurance policy, under which we will spend up to $1 million to cover certain third-party costs and expenses incurred in connection with the remediation, such as legal and investigatory fees, subject to certain terms and conditions. This insurance also covers certain out-of-pocket expenses, such as loss of income, replacement of fraudulent withdrawals, and costs associated with child and elderly care, travel, stolen purse/wallet, and replacement of documents, subject to certain terms and conditions. While we have reimbursed members for claims under this guarantee, the amounts in aggregate for the nine -month periods ended September 30, 2016 and 2015 were not material. On July 21, 2015 the FTC lodged, under seal, in the United States District Court for the District of Arizona, a motion seeking to hold us in contempt of the consent decree we entered into with the FTC in 2010 (the FTC Order). On December 17, 2015, we entered into a comprehensive settlement agreement with the FTC, pursuant to which we resolved all matters related to the FTC Contempt Action and provided a mechanism to fund a settlement of the Ebarle Class Action described below. On January 19, 2015, plaintiffs Napoleon Ebarle and Jeanne Stamm filed a nationwide putative consumer class action lawsuit against us in the United States District Court for the Northern District of California. A second amended complaint was filed on November 4, 2015 on behalf of four plaintiffs who alleged that we engaged in deceptive marketing and sales practices in connection with our membership plans in violation of the Arizona Consumer Fraud Act, Breach of Contract, unjust enrichment and violation of the Federal Declaratory Judgment Act. Under the terms of the FTC settlement, $100 million , was paid in December 2015 and was placed into the registry of the court overseeing the FTC Contempt Action, $68 million of which was authorized to be distributed to fund the consumer redress contemplated by the Ebarle Class Action settlement. Those funds have been transferred to the supervision of the court overseeing the Ebarle Class Action Settlement. On September 20, 2016, the court overseeing the Ebarle Class Action entered judgment and an order granting plaintiffs’ motion for final approval of the parties’ proposed settlement agreement, awarding plaintiffs’ counsel $10.2 million in fees and costs and awarding each of the four plaintiffs $2,000 as a service award, these amounts were previously expensed in the third quarter of 2015. Beginning on October 11, 2016, the Court-appointed settlement administrator distributed settlement checks to settlement class members using the $68 million transferred in February 2016 to the court-appointed settlement administrator from the court’s registry in the FTC Contempt Action. The remaining $32 million of the settlement remains in the registry of the Arizona court. In addition, we have $3.0 million accrued for a potential settlement with states attorneys general for related claims. Appeals of the final approval order and judgment were filed by six objectors prior to the filing deadline and are pending in the Ninth Circuit Court of Appeals. The appeals do not impact the timing of the payment of settlement checks to settlement class members or payment of the attorneys’ fees, costs and service awards to plaintiffs. A mediation assessment conference is scheduled with the Court of Appeals for November 9, 2016, in connection with the initial appeal filed, and the appeal briefs are currently due on various dates in January through March 2017. However, the parties have agreed to consolidate the appeals which is likely to have an impact on the current schedule. On August 1, 2014, our subsidiaries Lemon and Lemon Argentina, S.R.L. (Lemon Argentina, and together, the Lemon Entities) filed a lawsuit in Santa Clara Superior Court in San Jose, California, against Wenceslao Casares, former General Manager of Lemon, Cynthia McAdam, former General Counsel of Lemon, and Federico Murrone, Martin Apesteguia and Fabian Cuesta, each a former employee and former member of the board of directors of Lemon Argentina (the Argentine Executives). The complaint alleges breaches of employment-related contracts and breaches of fiduciary duties involving each named individual’s work for third-party Xapo, Inc. and/or Xapo, Ltd. during their employment by the applicable Lemon Entity. On January 30, 2015, the Lemon Entities filed a second amended complaint alleging breaches of employment-related contracts, breaches of fiduciary duties, and fraud, and seeking declaratory relief against Mr. Casares, Ms. McAdam, and the Argentine Executives. The Argentine Executives entered their appearances in the litigation on July 24, 2015 and filed a motion to dismiss for inconvenient forum on September 8, 2015. That motion was heard on December 4, 2015 and granted on January 4, 2016, with an order staying the action in its entirety. The Lemon Entities filed a notice of appeal on March 1, 2016. Mr. Casares filed a cross-claim against us and Lemon, Inc. (now Lemon, LLC) on July 24, 2015, for breach of contract, breach of the implied covenant of good faith and fair dealing, conversion, unjust enrichment, and declaratory relief, all arising from the termination of his employment. Because of the January 4, 2016 order staying the case in its entirety, the court did not rule on the motion to dismiss. Mr. Casares filed a separate complaint against us, Lemon, LLC, and Shareholder Representative Services LLC (SRS) in Delaware Chancery Court on October 7, 2015 for breach of contract and seeking a declaratory judgment. The action concerns a December 12, 2014 settlement agreement that resolved certain disputes against other former stockholders of Lemon, Inc. arising out of our December 11, 2013 Lemon acquisition. We, along with Lemon, LLC, moved to dismiss the complaint on October 28, 2015. Mr. Casares responded by filing an amended complaint on January 8, 2016. LifeLock, Inc. and Lemon, LLC moved to dismiss the amended complaint. That motion was heard on September 27, 2016 and granted in part and denied in part the same day. The Court has not yet set a schedule for pretrial or trial proceedings in the case. On September 19, 2016, LifeLock and its subsidiary Lemon. LLC, filed a lawsuit in Delaware Chancery Court against Mr. Casares and Ms. McAdam, stemming from the December 11, 2013 merger between LifeLock and Lemon. Specifically, the complaint alleges that both Mr. Casares and Ms. McAdam breached the representations and warranties in the merger agreement and associated contracts, such as their respective non-disclosure agreement, by failing to disclose Lemon’s pre-merger development of Xapo. The complaint also alleges that Mr. Casares and Ms. McAdam fraudulently induced LifeLock to enter into the merger agreement, breached their fiduciary duties to Lemon, and were unjustly enriched from their fraudulent conduct. Defendants filed a motion to dismiss on October 24, 2016. The parties have not yet agreed to a briefing schedule for the motion. On July 22, 2015, Miguel Avila, representing himself and seeking to represent a class of persons who acquired our securities from July 30, 2014 to July 20, 2015, inclusive, filed a class action complaint in the United States District Court for the District of Arizona. His complaint alleged that Todd Davis, Christopher Power, and we violated Sections 10(b) and 20(a) of the Exchange Act by making materially false or misleading statements, or failing to disclose material facts about our business, operations, and prospects, including with regard to our information security program, advertising, recordkeeping, and our compliance with the FTC Order. The complaint sought certification as a class action, compensatory damages, and attorney’s fees and costs. On September 21, 2015, four other Company stockholders, Oklahoma Police Pension and Retirement System, Oklahoma Firefighters Pension and Retirement System, Larisa Gassel, and Donna Thompson, and their respective attorneys all filed motions seeking to be appointed the lead plaintiff and lead counsel in this class action. On October 9, 2015, the Court appointed Oklahoma Police Pension and Retirement System and Oklahoma Firefighters Pension and Retirement System as lead plaintiffs. On December 10, 2015 lead plaintiffs filed a substantively similar amended complaint. Lead plaintiffs moved to lift the discovery stay imposed by the Private Securities Litigation Reform Act on January 21, 2016. On February 8, 2016, we, along with Mr. Davis and Mr. Power, opposed that motion and on April 22, 2016, the Court denied lead plaintiffs’ motion. We, along with Mr. Davis and Mr. Power, moved to dismiss the amended complaint on January 29, 2016. On August 3, 2016 the Court granted our motion to dismiss and later permitted lead plaintiffs until September 23, 2016 to seek leave to amend their complaint. On September 23, 2016, lead plaintiffs moved for leave to file a proposed Second Amended Complaint, which we did not oppose. On October 13, 2016, the Court granted lead plaintiffs’ motion for leave to file a second amended complaint. On October 14, 2016, lead plaintiffs filed the Second Amended Complaint, which is substantively similar to the amended complaint but adds our President, Hilary Schneider, as a named defendant. We, along with Ms. Schneider and Messrs. Davis and Power will move to dismiss the Second Amend Complaint by December 16, 2016, pursuant to a schedule stipulated by the parties and order by the Court. On March 3, 2014, and March 10, 2014, two securities class action complaints were filed in the United States District Court for the District of Arizona, against us, Mr. Davis, and Mr. Power. On June 16, 2014, the court consolidated the complaints into a single action captioned In re LifeLock, Inc. Securities Litigation and appointed a lead plaintiff and lead counsel. On August 15, 2014, the lead plaintiff filed the Consolidated Amended Class Action Complaint (the Consolidated Amended Complaint), seeking to represent a class of persons who acquired our securities from February 26, 2013 to May 16, 2014, inclusive (the Class Period). The Consolidated Amended Complaint alleged that we, along with Mr. Davis, Mr. Power, and Ms. Schneider, violated Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, by making materially false or misleading statements, or failing to disclose material facts regarding certain of our business, operational, and compliance policies, including with regard to certain of our services, our data security program, and Mr. Davis’ compliance with the FTC Order. The Consolidated Amended Complaint alleged that, as a result, certain of our financial statements issued during the Class Period and certain public statements made by Ms. Schneider, Mr. Davis, and Mr. Power during the Class Period, were false and misleading. The Consolidated Amended Complaint sought certification as a class action, compensatory damages, and attorneys’ fees and costs. On December 17, 2014, the court granted our and the other defendants’ motion and dismissed the Consolidated Amended Complaint, giving the lead plaintiff 21 days to seek leave to amend. On January 16, 2015, lead plaintiff filed his Second Consolidated Amended Complaint which contained similar allegations, but no longer named Ms. Schneider as a defendant. On July 21, 2015, the court granted our and the other defendants’ motion to dismiss the Second Consolidated Amended Complaint, without leave to amend, and entered judgment in our favor. On August 18, 2015, the lead plaintiff along with another stockholder, City of Hallandale Beach Police and Firefighters’ Personnel Retirement Fund, moved to vacate the judgment on the grounds that the FTC’s July 21, 2015 motion seeking to hold us in contempt of the FTC Order constituted surprise and newly discovered evidence. Plaintiffs also sought permission to file a Third Consolidated Amended Complaint. We, Mr. Davis, and Mr. Power opposed plaintiffs’ motion. On September 18, 2015, the court denied plaintiffs’ motion to vacate the July 21, 2015 judgment and plaintiffs’ request to file another complaint. On September 21, 2015, plaintiffs filed a notice of appeal with the Ninth Circuit Court of Appeals. Plaintiffs appeal from the lower court’s July 21, 2015 order dismissing the Second Consolidated Amended Complaint and entering judgment in our favor, and the court’s September 18, 2015 order denying plaintiffs’ motion to vacate that judgment. Briefing of the appeal has been completed, but oral argument on the appeal has not been set by the Ninth Circuit. We are subject to other legal proceedings and claims that have arisen in the ordinary course of business. Although there can be no assurance as to the ultimate disposition of these matters and those discussed above, we believe, based upon the information available at this time, that, except as disclosed above, a material adverse outcome related to the matters is neither probable nor estimable.

Summary of Significant Accoun18

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Basis of Accounting	The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP), and applicable Securities and Exchange Commission (SEC), rules and regulations regarding interim financial reporting. Certain information and note disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2015 , or fiscal 2015 Form 10-K. The condensed consolidated balance sheet as of December 31, 2015 included herein was derived from the audited financial statements as of that date, but does not include all disclosures including notes required by U.S. GAAP. The accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, and cash flows for the interim periods, but are not necessarily indicative of the anticipated results of operations for the entire year ending December 31, 2016 or any future period.
Consolidation	The condensed consolidated financial statements include our accounts and those of our wholly and indirectly owned subsidiaries. We eliminate all intercompany balances and transactions, including intercompany profits, in consolidation.
Use of Estimates	The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires us to make certain estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We continually evaluate our estimates, including those related to the allocation of the purchase price associated with acquisitions; the carrying value of long-lived assets; the amortization period of long-lived assets; the carrying value, capitalization, and amortization of software and website development costs; the carrying value of goodwill and other intangible assets; the amortization period of intangible assets; the provision for income taxes and related deferred tax accounts, and realizability of deferred tax assets; certain accrued expenses; contingencies, litigation, and related legal accruals; and the value attributed to employee stock options and other stock-based awards. We base our estimates on historical experience, current business factors, and various other assumptions that we believe are necessary to consider to form a basis for making judgments. Actual results could be materially different from these estimates.
Recently Issued Accounting Standards	In May 2014, the FASB, issued ASU 2014-09, Revenue from Contracts with Customers, which provides guidance for revenue recognition. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under today’s guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price, and allocating the transaction price to each separate performance obligation. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers: Deferral of the Effective Date , which defers the effective date of ASU 2014-09 for all entities for one year. Consequently, the guidance provided in ASU 2014-09 will be effective for us in the first quarter of our fiscal year ending December 31, 2018. Early adoption is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The guidance permits the use of either the retrospective or cumulative effect transition method. In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations , which clarifies the implementation guidance on principal versus agent considerations. ASU 2016-08 is effective the same date as ASU 2014-09, Revenue from Contracts with Customers . In April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing , which clarifies the guidance related to identifying performance obligations and licensing implementation guidance. ASU 2016-10 reduces the cost and complexity of applying certain aspects of the guidance both at implementation and on an ongoing basis. The effective date for ASU 2016-10 is the same as ASU 2014-09. We are currently in the process of evaluating the impact of the adoption of this guidance on our consolidated financial statements and have not yet selected a transition method. In February 2016, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update (ASU) 2016-02, Leases , which requires lessees to recognize the assets and liabilities on their balance sheet for the rights and obligations created by operating leases and will also require disclosures designed to give users of financial statements information on the amount, timing, and uncertainty of cash flows arising from leases. The guidance provided by ASU 2016-02 is effective for annual periods beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the effect of ASU 2016-06 on our consolidated financial statements and do not plan to early adopt this guidance. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718) Improvements to Employee Share-Based Payment Accounting , which require all income tax effects of awards to be recognized in the income statement when the awards vest or are settled, as well as revising guidance around classification of awards as either equity or liabilities, forfeitures and classification on the statement of cash flows. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the effect of ASU 2016-09 on our consolidated financial statements and do not plan to early adopt this guidance. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, which makes changes to how certain cash receipt and cash payments are presented and classified in the cash flow statement. ASU 2016-15 is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The amendments in ASU 2016-15 will be applied using a retrospective transition method for each period presented unless it is impracticable to apply the amendments retrospectively, in which case prospective application would be applied as of the earliest date practicable. Early adoption is permitted. We are currently evaluating the effect of ASU 2016-15 on our consolidated financial statements and do not plan to early adopt this guidance.

Marketable Securities (Tables)

Marketable Securities (Tables)	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Summary of marketable securities designated as available-for-sale	The following is a summary of marketable securities designated as available-for-sale as of December 31, 2015 : Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) Corporate bonds $ 125,132 $ 1 $ (304 ) $ 124,829 Commercial paper 37,236 — — 37,236 Municipal bonds 16,228 2 (6 ) 16,224 Government securities 8,704 1 (17 ) 8,688 Agency securities 7,273 — (20 ) 7,253 Certificates of deposit 2,244 — — 2,244 Total marketable securities $ 196,817 $ 4 $ (347 ) $ 196,474 The following is a summary of marketable securities designated as available-for-sale as of September 30, 2016 : Amortized Gross Gross Estimated (in thousands) Corporate bonds $ 100,964 $ 14 $ (126 ) $ 100,852 Government securities 9,695 10 — 9,705 Commercial paper 8,187 — — 8,187 Agency securities 7,255 3 — 7,258 Municipal bonds 4,050 — (2 ) 4,048 Certificates of deposit 1,248 — — 1,248 Total marketable securities $ 131,399 $ 27 $ (128 ) $ 131,298
Summary of amortized cost and estimated fair value of marketable securities by maturity	The following is a summary of amortized cost and estimated fair value of marketable securities as of December 31, 2015 by maturity: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) Due in one year or less $ 164,147 $ 2 $ (221 ) $ 163,928 Due after one year 32,670 2 (126 ) 32,546 Total marketable securities $ 196,817 $ 4 $ (347 ) $ 196,474 The following is a summary of amortized cost and estimated fair value of marketable securities as of September 30, 2016 by maturity: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) Due in one year or less $ 121,461 $ 27 $ (94 ) $ 121,394 Due after one year 9,938 — (34 ) $ 9,904 Total marketable securities $ 131,399 $ 27 $ (128 ) $ 131,298

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair value of financial assets and liabilities	As of September 30, 2016 and December 31, 2015 , the fair value of our financial assets was as follows: Level 1 Level 2 Level 3 Total (in thousands) September 30, 2016 Assets: Money market funds (1) $ 14,733 $ — $ — $ 14,733 Corporate bonds (2) — 100,852 — 100,852 Government securities (2) — 9,705 — 9,705 Commercial paper (2) — 8,187 — 8,187 Agency securities (2) — 7,258 — 7,258 Municipal bonds (2) — 4,048 — 4,048 Certificates of deposit (2) — 1,248 — 1,248 Total assets measured at fair value $ 14,733 $ 131,298 $ — $ 146,031 December 31, 2015 Assets: Money market funds (1) $ 18,114 $ — $ — $ 18,114 Corporate bonds (2) — 124,829 — 124,829 Commercial paper (3) — 47,294 — 47,294 Municipal bonds (2) — 16,223 — 16,223 Government securities (2) — 8,688 — 8,688 Agency securities (2) — 7,253 — 7,253 Certificates of deposit (2) — 2,244 — 2,244 Total assets measured at fair value $ 18,114 $ 206,531 $ — $ 224,645 (1) Classified in cash and cash equivalents (2) Classified in marketable securities. (3) Includes commercial paper with maturities of three months or less at time of purchase of $10.1 million classified in cash and cash equivalents and commercial paper with maturities of greater than three months of $37.2 million classified in marketable securities.

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2016
Leases [Abstract]
Schedule of future minimum lease payments for all outstanding lease agreements	The following summarizes the future minimum lease payments for all outstanding lease agreements as of September 30, 2016 : Financing Obligation, Building in Operating Progress - Leases Leased Facility Remaining 2016 $ 1,959 $ — 2017 7,429 1,717 2018 6,751 4,222 2019 6,355 4,349 2020 4,773 4,480 Thereafter 14,151 27,605 Gross future minimum lease payments 41,418 42,373 Less: expected proceeds from sublease rentals (776 ) — Net future minimum lease payments $ 40,642 $ 42,373

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Schedule of share-based compensation components	The following table summarizes the components of stock-based compensation expense included in our condensed consolidated statements of operations: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 (in thousands) Cost of services $ 486 $ 449 $ 1,445 $ 1,286 Sales and marketing 1,672 1,238 4,793 3,385 Technology and development 2,574 2,514 7,893 6,226 General and administrative 3,880 3,662 11,378 9,390 Total stock-based compensation $ 8,612 $ 7,863 $ 25,509 $ 20,287

Net Income (Loss) Per Share (Ta

Net Income (Loss) Per Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Basic and diluted net Income (loss) per share attributable to common stockholders	The following table sets forth the computation of basic and diluted net income (loss) per share attributable to common stockholders: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 (in thousands, except share and per share data) Numerator: Net income (loss) $ 14,402 $ (65,145 ) $ (4,390 ) $ (73,783 ) Less: Net income attributable to participating securities (109 ) — — — Net income (loss) attributable to common stockholders $ 14,293 $ (65,145 ) $ (4,390 ) $ (73,783 ) Denominator (basic): Weighted average common shares outstanding 92,034,474 95,340,136 93,052,376 94,659,931 Denominator (diluted): Weighted average common shares outstanding 92,034,474 95,340,136 93,052,376 94,659,931 Dilutive stock options outstanding 3,716,283 — — — Dilutive restricted stock units and awards 1,557,016 — — — Dilutive shares purchased under ESPP 13,530 — — — Net weighted average common shares outstanding 97,321,303 95,340,136 93,052,376 94,659,931 Net income (loss) per share attributable to common stockholders: Basic $ 0.16 $ (0.68 ) $ (0.05 ) $ (0.78 ) Diluted $ 0.15 $ (0.68 ) $ (0.05 ) $ (0.78 )
Stock options, warrants to purchase common and preferred stock and convertible redeemable preferred stock excluded from computation of diluted net income (loss) per share	The following weighted-average number of outstanding employee stock options, restricted stock units and restricted stock awards, warrants to purchase common stock, and shares purchased under our ESPP were excluded from the computation of diluted net income (loss) per share attributable to common stockholders: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Stock options outstanding 5,006,875 10,328,593 9,268,689 8,876,984 Restricted stock units and restricted stock awards 210,720 2,574,405 2,469,961 1,888,205 Common equivalent shares from stock warrants — 2,168,299 276,937 2,210,012 Shares purchased under ESPP — 54,271 — 67,858 5,217,595 15,125,568 12,015,587 13,043,059

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Financial information of segments	Revenue and income (loss) from operations by operating segment for the three-month period ended September 30, 2016 and goodwill and total assets by operating segment as of September 30, 2016 were: Consumer Enterprise Eliminations Total (in thousands) Revenue External customers $ 161,671 $ 8,623 $ — $ 170,294 Intersegment revenue — 2,253 (2,253 ) — Income (loss) from operations 26,636 (3,783 ) — 22,853 Goodwill 112,550 59,537 — 172,087 Total assets 434,517 91,979 (771 ) 525,725 Revenue and income (loss) from operations by operating segment for the nine -month period ended September 30, 2016 was as follows: Consumer Enterprise Eliminations Total (in thousands) Revenue External customers $ 470,260 $ 23,746 $ — $ 494,006 Intersegment revenue — 6,866 (6,866 ) — Income (loss) from operations 4,881 (13,330 ) — (8,449 ) Revenue and loss from operations by operating segment for the three-month period ended September 30, 2015 and goodwill and total assets by operating segment as of December 31, 2015 were: Consumer Enterprise Eliminations Total (in thousands) Revenue External customers $ 144,648 $ 7,304 $ — $ 151,952 Intersegment revenue — 2,068 (2,068 ) — Loss from operations (84,249 ) (3,101 ) — (87,350 ) Goodwill 112,550 59,537 — 172,087 Total assets 492,796 100,753 (740 ) 592,809

Summary of Significant Accoun25

Summary of Significant Accounting Policies (Details)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Operating leases, term of contract	11 years

Marketable Securities - Summary

Marketable Securities - Summary of Marketable Securities Designated as Available-for-Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 131,399	$ 196,817
Gross Unrealized Gains	27	4
Gross Unrealized Losses	(128)	(347)
Estimated Fair Value	131,298	196,474
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	100,964	125,132
Gross Unrealized Gains	14	1
Gross Unrealized Losses	(126)	(304)
Estimated Fair Value	100,852	124,829
Government securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,695	8,704
Gross Unrealized Gains	10	1
Gross Unrealized Losses	0	(17)
Estimated Fair Value	9,705	8,688
Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,187	37,236
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	8,187	37,236
Agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,255	7,273
Gross Unrealized Gains	3	0
Gross Unrealized Losses	0	(20)
Estimated Fair Value	7,258	7,253
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,050	16,228
Gross Unrealized Gains	0	2
Gross Unrealized Losses	(2)	(6)
Estimated Fair Value	4,048	16,224
Certificates of deposit
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,248	2,244
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 1,248	$ 2,244

Marketable Securities - Summa27

Marketable Securities - Summary of Amortized Cost and Estimated Fair Value of Marketable Securities by Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 131,399	$ 196,817
Gross Unrealized Gains	27	4
Gross Unrealized Losses	(128)	(347)
Estimated Fair Value	131,298	196,474
Due in one year or less
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	121,461	164,147
Gross Unrealized Gains	27	2
Gross Unrealized Losses	(94)	(221)
Estimated Fair Value	121,394	163,928
Due after one year
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,938	32,670
Gross Unrealized Gains	0	2
Gross Unrealized Losses	(34)	(126)
Estimated Fair Value	$ 9,904	$ 32,546

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value of Financial Assets (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets measured at fair value		$ 146,031	$ 224,645
Level 1
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets measured at fair value		14,733	18,114
Level 2
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets measured at fair value		131,298	206,531
Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets measured at fair value		0	0
Money market funds (1)
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[1]	14,733	18,114
Money market funds (1) | Level 1
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[1]	14,733	18,114
Money market funds (1) | Level 2
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[1]	0	0
Money market funds (1) | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[1]	0	0
Corporate bonds
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	100,852	124,829
Corporate bonds | Level 1
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	0	0
Corporate bonds | Level 2
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	100,852	124,829
Corporate bonds | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	0	0
Government securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	9,705	8,688
Government securities | Level 1
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	0	0
Government securities | Level 2
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	9,705	8,688
Government securities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	0	0
Commercial paper
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities			10,100
Assets measured at fair value, cash and cash equivalents	[3]	8,187	47,294
Commercial paper with maturities of three months or less			37,200
Commercial paper | Level 1
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, cash and cash equivalents	[3]	0	0
Commercial paper | Level 2
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, cash and cash equivalents	[3]	8,187	47,294
Commercial paper | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, cash and cash equivalents	[3]	0	0
Agency securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	7,258	7,253
Agency securities | Level 1
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	0	0
Agency securities | Level 2
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	7,258	7,253
Agency securities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	0	0
Municipal bonds
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	4,048	16,223
Municipal bonds | Level 1
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	0	0
Municipal bonds | Level 2
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	4,048	16,223
Municipal bonds | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	0	0
Certificates of deposit
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	1,248	2,244
Certificates of deposit | Level 1
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	0	0
Certificates of deposit | Level 2
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	1,248	2,244
Certificates of deposit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value, marketable securities	[2]	$ 0	$ 0
[1]	Classified in cash and cash equivalents
[2]	Classified in marketable securities.
[3]	Includes commercial paper with maturities of three months or less at time of purchase of $10.1 million classified in cash and cash equivalents and commercial paper with maturities of greater than three months of $37.2 million classified in marketable securities.

Financing Arrangements (Details

Financing Arrangements (Details) $ in Millions	Sep. 30, 2016USD ($)
Letter of credit
Debt Instrument [Line Items]
Letter of credit outstanding	$ 1.3

Leases (Details)

Leases (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2016USD ($)ft²	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)
Operating Leased Assets [Line Items]
Building in progress - leased facility acquired under financing obligation				$ 12,338	$ 0
Operating leases, rent expense, net		$ 2,400	$ 1,500	6,400	$ 4,300
Operating leases, future minimum payments due, remaining 2016		1,959		1,959
Operating leases, future minimum payments due, 2017		7,429		7,429
Operating leases, future minimum payments due, 2018		6,751		6,751
Operating leases, future minimum payments due, 2019		6,355		6,355
Operating leases, future minimum payments due, 2020		4,773		4,773
Operating leases, future minimum payments due, thereafter		14,151		14,151
Operating leases, future minimum payments due, gross		41,418		41,418
Operating leases, future minimum payments due, future minimum sublease rentals		(776)		(776)
Operating leases, rent expense, net of future minimum lease payments		40,642		40,642
Contractual obligation, future minimum payments due, remaining 2016		0		0
Contractual obligation, future minimum payments due, 2017		1,717		1,717
Contractual obligation, future minimum payments due, 2018		4,222		4,222
Contractual obligation, future minimum payments due, 2019		4,349		4,349
Contractual obligation, future minimum payments due, 2020		4,480		4,480
Contractual obligation, future minimum payments due, thereafter		27,605		27,605
Contractual obligation, future minimum payments due		42,373		$ 42,373
Building
Operating Leased Assets [Line Items]
Property, plant and equipment, useful life				30 years
Mountain View, CA
Operating Leased Assets [Line Items]
Net rentable area | ft²	60,000
Building in progress - leased facility acquired under financing obligation	$ 12,300
Ground lease rent expense		$ 600		$ 600
Operating leases, rent expense, net				$ 4,000

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - USD ($)	1 Months Ended			3 Months Ended	9 Months Ended
	Jul. 31, 2016	May 31, 2016	Feb. 29, 2016	Sep. 30, 2016	Sep. 30, 2016	Aug. 31, 2016	Dec. 31, 2015	Nov. 30, 2015
Accelerated Share Repurchases [Line Items]
Authorized stock repurchase program amount								$ 100,000,000
Percentage of outstanding stock authorized for repurchase								7.00%
Treasury stock transaction				$ 74,974,000	$ 74,974,000		$ 0
Shares of common stock repurchased					200,000
Average price of common stock repurchased (in dollars per share)					$ 10.49
Accelerated Share Repurchase, February 2016
Accelerated Share Repurchases [Line Items]
Authorized stock repurchase program amount								$ 100,000,000
Payment for accelerate share repurchase program			$ 50,000,000
Number of shares to be repurchased under accelerated share repurchase program			4,200,000	76,000
Treasury stock transaction			$ 42,500,000
Forward contract indexed to common stock			$ 7,500,000
Accelerated Share Repurchase, February 2016 | Additional paid-in capital
Accelerated Share Repurchases [Line Items]
Forward contract indexed to common stock				$ 7,500,000	$ 7,500,000
Accelerated Share Repurchase, February 2016 | Treasury stock
Accelerated Share Repurchases [Line Items]
Forward contract indexed to common stock				1,000,000	1,000,000
Accelerate Share Repurchase, May 2016
Accelerated Share Repurchases [Line Items]
Authorized stock repurchase program amount		$ 100,000,000
Payment for accelerate share repurchase program		$ 48,100,000
Number of shares to be repurchased under accelerated share repurchase program	300,000	3,500,000
Treasury stock transaction		$ 40,900,000
Forward contract indexed to common stock		$ 7,200,000
Accelerate Share Repurchase, May 2016 | Additional paid-in capital
Accelerated Share Repurchases [Line Items]
Treasury stock transaction						$ 4,800,000
Forward contract indexed to common stock				$ 7,200,000	$ 7,200,000

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Components of Share-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Stock-based Compensation Arrangement by Stock-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 8,612	$ 7,863	$ 25,509	$ 20,287
Unrecognized stock-based compensation expenses	78,400		$ 78,400
Weighted-average time period to recognize stock-based compensation expenses			2 years 11 months
Cost of services
Stock-based Compensation Arrangement by Stock-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	486	449	$ 1,445	1,286
Sales and marketing
Stock-based Compensation Arrangement by Stock-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	1,672	1,238	4,793	3,385
Technology and development
Stock-based Compensation Arrangement by Stock-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	2,574	2,514	7,893	6,226
General and administrative
Stock-based Compensation Arrangement by Stock-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 3,880	$ 3,662	$ 11,378	$ 9,390

Stockholders' Equity - Summar33

Stockholders' Equity - Summary of Warrants (Details)	9 Months Ended
	Sep. 30, 2016shares
Class Of Stock [Line Items]
Warrants outstanding	0
Common Stock
Class Of Stock [Line Items]
Stock issued as a result of warrants exercised	2,210,335
Warrant One | Common Stock
Class Of Stock [Line Items]
Warrants outstanding	2,334,044

Net Income (Loss) Per Share - C

Net Income (Loss) Per Share - Computation of Basic and Diluted Net Income (Loss) Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income (loss)	$ 14,402	$ (65,145)	$ (4,390)	$ (73,783)
Less: Net income attributable to participating securities	(109)	0	0	0
Net income (loss) attributable to common stockholders	$ 14,293	$ (65,145)	$ (4,390)	$ (73,783)
Denominator (basic):
Weighted average number of shares outstanding, basic (in shares)	92,034,474	95,340,136	93,052,376	94,659,931
Denominator (diluted):
Weighted average number of shares outstanding, basic (in shares)	92,034,474	95,340,136	93,052,376	94,659,931
Dilutive stock options outstanding (in shares)	3,716,283	0	0	0
Dilutive restricted stock units and awards (in shares)	1,557,016	0	0	0
Dilutive shares purchased under ESPP (in shares)	13,530	0	0	0
Net weighted average common shares, diluted (in shares)	97,321,303	95,340,136	93,052,376	94,659,931
Earnings per share, basic (in dollars per share)	$ 0.16	$ (0.68)	$ (0.05)	$ (0.78)
Earnings per share, diluted (in dollars per share)	$ 0.15	$ (0.68)	$ (0.05)	$ (0.78)

Net Income (Loss) Per Share - N

Net Income (Loss) Per Share - Number of Outstanding Stock Options, Warrants to Purchase Common Preferred Stock and Convertible Redeemable Preferred Stock Excluded from Computation of Diluted Net Income (Loss) Per Share (Details) - Excluded from earnings per share calculation - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options outstanding (in shares)	5,006,875	10,328,593	9,268,689	8,876,984
Restricted stock units and restricted stock awards (in shares)	210,720	2,574,405	2,469,961	1,888,205
Common equivalent shares from stock warrants (in shares)	0	2,168,299	276,937	2,210,012
Shares purchased under ESPP (in shares)	0	54,271	0	67,858
Antidilutive securities excluded from computation of earnings per share, amount, total (in shares)	5,217,595	15,125,568	12,015,587	13,043,059

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Income Tax Contingency [Line Items]
Income tax expense (benefit)	$ 8,527	$ (22,075)	$ (3,801)	$ (27,784)
Tax provision adjustment	$ 800	$ 400
Term of cumulative pretax net losses			3 years
Term of improvement in book income			5 years
FTC contempt action | Settled litigation
Income Tax Contingency [Line Items]
Settlement amount					$ 116,000
Legal reserve
Income Tax Contingency [Line Items]
Reserves					$ 96,000	$ 20,000

Segment Reporting - Additional

Segment Reporting - Additional Information (Details)	9 Months Ended
	Sep. 30, 2016segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segment Reporting - Financial I

Segment Reporting - Financial Information of Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Revenue
External customers	$ 170,294	$ 151,952	$ 494,006	$ 431,317
Intersegment revenue	0	0	0	0
Income (loss) from operations	22,853	(87,350)	(8,449)	(101,617)
Goodwill	172,087		172,087		$ 172,087
Total assets	525,725		525,725		592,809
Consumer
Revenue
External customers	161,671	144,648	470,260	411,178
Intersegment revenue	0	0	0	0
Income (loss) from operations	26,636	(84,249)	4,881	(90,456)
Goodwill	112,550		112,550		112,550
Total assets	434,517		434,517		492,796
Enterprise
Revenue
External customers	8,623	7,304	23,746	20,139
Intersegment revenue	2,253	2,068	6,866	6,232
Income (loss) from operations	(3,783)	(3,101)	(13,330)	(11,161)
Goodwill	59,537		59,537		59,537
Total assets	91,979		91,979		100,753
Eliminations
Revenue
External customers	0	0	0	0
Intersegment revenue	(2,253)	(2,068)	(6,866)	(6,232)
Income (loss) from operations	0	$ 0	0	$ 0
Goodwill	0		0		0
Total assets	$ (771)		$ (771)		$ (740)

Contingencies (Details)

Contingencies (Details) $ in Thousands	Sep. 20, 2016USD ($)plaintiff	Nov. 04, 2015plaintiff	Sep. 21, 2015plaintiff	Jun. 16, 2014claim	Feb. 29, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 30, 2016USD ($)plaintiff	Dec. 31, 2015USD ($)
Loss Contingencies [Line Items]
Net amount at risk by product and guarantee, general account value							$ 1,000
FTC contempt action | Settled litigation
Loss Contingencies [Line Items]
Payments for legal settlements						$ 100,000
Litigation settlement, amount distributed to the overseeing court						$ 68,000
Settlement amount								$ (116,000)
Litigation settlement, amount authorized to fund consumer redress by any states' attorneys general							$ 32,000
Ebarle class action | Pending litigation
Loss Contingencies [Line Items]
Loss contingency, number of plaintiffs | plaintiff		4					6
Loss contingency, accrual, current							$ 3,000
Ebarle class action | Settled litigation
Loss Contingencies [Line Items]
Litigation settlement, amount distributed to the overseeing court					$ 68,000
Ebarle class action | Judicial ruling
Loss Contingencies [Line Items]
Loss contingency, number of plaintiffs | plaintiff	4
Litigation settlement, expense	$ 10,200
Settlement amount	$ 2
FTC order | Pending litigation
Loss Contingencies [Line Items]
Loss contingency, number of plaintiffs | plaintiff			4
LifeLock, Inc. securities litigation | Pending litigation
Loss Contingencies [Line Items]
Loss contingency, new claims filed, number | claim				2