Carbonite (CARB) 10-Q 6 Aug 19 2019 Q2 Quarterly report Financial data

Cover

Cover - shares	6 Months Ended
	Jun. 30, 2019	Jul. 31, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2019
Entity File Number	001-35264
Entity Registrant Name	CARBONITE, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	33-1111329
Entity Address, Address Line One	Two Avenue de Lafayette
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02111
City Area Code	617
Local Phone Number	587-1100
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	CARB
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		34,689,712
Amendment Flag	false
Entity Central Index Key	0001340127
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 83,378	$ 198,087
Trade accounts receivable, less allowances for doubtful accounts of $1,389 and $892	47,110	31,569
Prepaid expenses and other current assets	22,573	10,409
Total current assets	153,061	240,065
Property and equipment, net	45,961	34,101
Right-of-use lease assets	48,299	0
Other assets	24,176	13,876
Acquired intangible assets, net	417,827	117,963
Goodwill	543,524	155,086
Total assets	1,232,848	561,091
Current liabilities:
Accounts payable	7,787	2,114
Accrued compensation	20,919	11,620
Accrued expenses and other current liabilities	29,947	15,844
Current portion of deferred revenue	180,053	121,553
Total current liabilities	238,706	151,131
Long-term debt	598,301	118,305
Long-term lease liabilities	46,750	0
Deferred revenue, net of current portion	43,727	29,151
Long-term deferred tax liabilities	43,052	1,456
Other long-term liabilities	3,140	3,838
Total liabilities	973,676	303,881
Commitments and contingencies (Note 13)
Stockholders’ equity:
Preferred stock, $0.01 par value; 6,000,000 shares authorized; no shares issued	0	0
Common stock, $0.01 par value; 45,000,000 shares authorized; 37,360,504 shares issued and 34,679,755 shares outstanding at June 30, 2019; 36,641,317 shares issued and 33,923,135 shares outstanding at December 31, 2018	374	366
Additional paid-in capital	461,633	451,618
Treasury stock, at cost (2,680,749 and 2,718,182 shares as of June 30, 2019 and December 31, 2018, respectively)	(47,850)	(48,522)
Accumulated other comprehensive income	2,188	1,650
Accumulated deficit	(157,173)	(147,902)
Total stockholders’ equity	259,172	257,210
Total liabilities and stockholders’ equity	$ 1,232,848	$ 561,091

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Trade accounts receivable, allowances for doubtful accounts	$ 1,389	$ 892
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	6,000,000	6,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	45,000,000	45,000,000
Common stock, shares issued (in shares)	37,360,504	36,641,317
Common stock, shares outstanding (in shares)	34,679,755	33,923,135
Treasury stock (in shares)	2,680,749	2,718,182

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Services	$ 114,431	$ 68,814	$ 185,934	$ 123,388
Product	7,079	8,920	16,791	18,372
Total revenue	121,510	77,734	202,725	141,760
Services	23,956	18,358	41,058	33,688
Product	440	374	823	931
Amortization of intangible assets	9,081	4,325	12,375	6,750
Total cost of revenue	33,477	23,057	54,256	41,369
Gross profit	88,033	54,677	148,469	100,391
Operating expenses:
Research and development	27,879	15,719	43,686	28,238
General and administrative	17,567	13,460	38,556	27,920
Sales and marketing	36,945	22,086	58,710	41,946
Amortization of intangible assets	9,765	3,652	14,065	4,591
Restructuring charges	702	41	702	903
Total operating expenses	92,858	54,958	155,719	103,598
Loss from operations	(4,825)	(281)	(7,250)	(3,207)
Interest expense	(11,844)	(3,420)	(15,855)	(6,021)
Interest income	418	169	1,383	413
Other income (expense), net	175	183	387	195
Loss before income taxes	(16,076)	(3,349)	(21,335)	(8,620)
(Benefit) provision for income taxes	(4,802)	2,338	(12,064)	(14,877)
Net (loss) income	$ (11,274)	$ (5,687)	$ (9,271)	$ 6,257
Earnings Per Share, Basic	$ (0.33)	$ (0.20)	$ (0.27)	$ 0.22
Earnings Per Share, Diluted	$ (0.33)	$ (0.20)	$ (0.27)	$ 0.20
Weighted Average Number of Shares Outstanding, Basic	34,459,359	28,628,173	34,312,971	28,485,695
Weighted Average Number of Shares Outstanding, Diluted	34,459,359	28,628,173	34,312,971	30,885,633

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other comprehensive income
Net (loss) income	$ (11,274)	$ (5,687)	$ (9,271)	$ 6,257
Foreign currency translation adjustments	173	1,149	538	510
Total other comprehensive income	173	1,149	538	510
Total comprehensive (loss) income	$ (11,101)	$ (4,538)	$ (8,733)	$ 6,767

Condensed Consolidated Statem_3

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock, Shares	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock	Accumulated Other Comprehensive Income
Beginning balance (in shares) at Dec. 31, 2017		30,130,856
Beginning Balance at Dec. 31, 2017	$ 38,265		$ 301	$ 233,343	$ (169,344)	$ (26,616)	$ 581
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised and vesting of restricted stock units, shares		408,764
Stock options exercised and vesting of restricted stock units	726		4	722
Stock-based compensation expense	3,818			3,818
Payments of withholding taxes in connection with restricted stock unit vesting	(550)					(550)
Adjustment resulting from the adoption of Topic 606	13,880				13,880
Other comprehensive income	(639)						(639)
Net (loss) income					11,944
Ending balance (in shares) at Mar. 31, 2018		30,539,620
Ending Balance at Mar. 31, 2018	67,444		305	237,883	(143,520)	(27,166)	(58)
Beginning balance (in shares) at Dec. 31, 2017		30,130,856
Beginning Balance at Dec. 31, 2017	38,265		301	233,343	(169,344)	(26,616)	581
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	510
Net (loss) income	6,257
Ending balance (in shares) at Jun. 30, 2018		30,770,414
Ending Balance at Jun. 30, 2018	68,402		308	243,077	(149,207)	(26,867)	1,091
Beginning balance (in shares) at Mar. 31, 2018		30,539,620
Beginning Balance at Mar. 31, 2018	67,444		305	237,883	(143,520)	(27,166)	(58)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised and vesting of restricted stock units, shares		230,794
Stock options exercised and vesting of restricted stock units	216		3	213
Stock-based compensation expense	4,699			4,699
Issuance of treasury stock in connection with employee stock purchase plan	1,215			282		933
Payments of withholding taxes in connection with restricted stock unit vesting	(634)					(634)
Other comprehensive income	1,149						1,149
Net (loss) income	(5,687)				(5,687)
Ending balance (in shares) at Jun. 30, 2018		30,770,414
Ending Balance at Jun. 30, 2018	68,402		308	243,077	(149,207)	(26,867)	1,091
Beginning balance (in shares) at Dec. 31, 2018		36,641,317
Beginning Balance at Dec. 31, 2018	257,210		366	451,618	(147,902)	(48,522)	1,650
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised and vesting of restricted stock units, shares		532,141
Stock options exercised and vesting of restricted stock units	136		6	130
Stock-based compensation expense	4,223			4,223
Payments of withholding taxes in connection with restricted stock unit vesting	(754)					(754)
Other comprehensive income	365						365
Net (loss) income					2,003
Ending balance (in shares) at Mar. 31, 2019		37,173,458
Ending Balance at Mar. 31, 2019	263,183		372	455,971	(145,899)	(49,276)	2,015
Beginning balance (in shares) at Dec. 31, 2018		36,641,317
Beginning Balance at Dec. 31, 2018	257,210		366	451,618	(147,902)	(48,522)	1,650
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	538
Net (loss) income	(9,271)
Ending balance (in shares) at Jun. 30, 2019		37,360,504
Ending Balance at Jun. 30, 2019	259,172		374	461,633	(157,173)	(47,850)	2,188
Beginning balance (in shares) at Mar. 31, 2019		37,173,458
Beginning Balance at Mar. 31, 2019	263,183		372	455,971	(145,899)	(49,276)	2,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised and vesting of restricted stock units, shares		187,046
Stock options exercised and vesting of restricted stock units	135		2	133
Stock-based compensation expense	5,524			5,524
Issuance of treasury stock in connection with employee stock purchase plan	1,582			5		1,577
Payments of withholding taxes in connection with restricted stock unit vesting	(151)					(151)
Other comprehensive income	173						173
Net (loss) income	(11,274)				(11,274)
Ending balance (in shares) at Jun. 30, 2019		37,360,504
Ending Balance at Jun. 30, 2019	$ 259,172		$ 374	$ 461,633	$ (157,173)	$ (47,850)	$ 2,188

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Income Taxes Paid, Net	$ 591
Operating activities
Net (loss) income	(9,271)	$ 6,257
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	34,214	17,763
Amortization of right-of-use assets	3,556	0
Amortization of deferred costs	1,413	931
Gain on disposal of equipment	(17)	(141)
Impairment of capitalized software	0	653
Stock-based compensation expense	9,717	8,478
Benefit for deferred income taxes	(12,241)	(16,317)
Non-cash interest expense related to amortization of debt discount	3,955	3,101
Other non-cash items, net	(262)	64
Changes in assets and liabilities:
Accounts receivable	3,401	(6,437)
Prepaid expenses and other current assets	(394)	(1,541)
Other assets	(1,512)	(3,771)
Accounts payable	4,553	(3,895)
Accrued expenses and other current liabilities	(6,254)	2,549
Other long-term liabilities	(6,858)	53
Deferred revenue	15,020	9,099
Net cash provided by operating activities	39,020	16,846
Investing activities
Purchases of property and equipment	(6,023)	(7,795)
Proceeds from sale of property and equipment and businesses	77	534
Proceeds from maturities of derivatives	1,340	1,680
Purchases of derivatives	(6)	(1,403)
Payment for intangibles	0	(1,250)
Payment for acquisition, net of cash acquired	(622,009)	(144,597)
Net cash used in investing activities	(626,621)	(152,831)
Financing activities
Proceeds from exercise of stock options	263	942
Proceeds from issuance of treasury stock under employee stock purchase plan	1,582	1,215
Payments of withholding taxes in connection with restricted stock unit vesting	(905)	(1,184)
Proceeds from long-term borrowings, net of debt issuance costs	529,483	88,068
Payments on long-term borrowings	(55,000)	(10,000)
Net cash provided by financing activities	475,423	79,041
Effect of currency exchange rate changes on cash	(92)	(305)
Net decrease in cash, cash equivalents and restricted cash	(112,270)	(57,249)
Cash, cash equivalents and restricted cash, beginning of period	198,087	128,231
Cash, cash equivalents and restricted cash, end of period	85,817	70,982
Supplemental disclosure of cash flow information
Cash (refund) paid for income taxes, net		524
Cash paid for interest	10,501	2,614
Supplemental disclosure of non-cash investing and financing activities:
Capitalization of stock-based compensation	29	39
Acquisition of property and equipment included in accounts payable and accrued expenses	1,150	(5)
Accrued payment for intangibles	$ 0	$ 4,500

Nature of Business

Nature of Business	6 Months Ended
	Jun. 30, 2019
Nature of Business [Abstract]
Nature of Operations	Nature of Business Carbonite, Inc. ("we" or the “Company”) provides a robust data protection platform for businesses, including backup, disaster recovery, high availability and workload migration technology. The Carbonite data protection platform supports businesses on a global scale with secure cloud infrastructure. The Company was incorporated in the State of Delaware on February 10, 2005. In March 2019, Carbonite acquired Webroot Inc. ("Webroot"), a next-generation cloud-based security and threat intelligence provider for consumers and businesses. Webroot is a leading security provider for managed service providers to protect small businesses, who rely on Webroot for endpoint protection, network protection, and security awareness training.

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2019
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 accordance with accounting principles generally accepted in the United States (“GAAP”) and include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions between the Company and its subsidiaries have been eliminated in consolidation. The accompanying unaudited interim condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”), the instructions to Form 10-Q, and the provisions of Regulation S-X pertaining to interim financial statements. Accordingly, certain information and footnote disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto, included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018 , as filed with the SEC on February 28, 2019. In the opinion of management, the condensed consolidated financial statements reflect all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the Company’s financial position for the periods presented. The results for the periods presented are not necessarily indicative of future results. Restricted Cash Restricted cash is defined as cash and cash equivalents subject to contractual restrictions and not readily available for use. As of June 30, 2019 , the Company's restricted cash balance related to deposits maintained for a lease of office space and corporate credit card accounts. As of December 31, 2018 , the Company did not have a restricted cash balance. The following tables summarizes the Company's cash, cash equivalents and restricted cash for the period presented: June 30, 2019 Cash and cash equivalents $ 83,378 Restricted cash, included in other assets 2,439 Total cash, cash equivalents and restricted cash $ 85,817 Reclassification The Company has reclassified certain prior period amounts in its condensed consolidated balance sheets to conform to the current period presentation. The reclassification relates to separately presenting long-term deferred tax liabilities previously included within other long-term liabilities. For the year ended December 31, 2018 , the Company reclassified $1.5 million from other long-term liabilities into long-term deferred tax liabilities. Recently Adopted Accounting Standards The Company's significant accounting policies are presented in Note 2 - Summary of Significant Accounting Policies , in the Company's Annual Report on Form 10-K for fiscal year ended December 31, 2018 filed with the SEC on February 28, 2019. Summarized below are the accounting pronouncements adopted subsequent to December 31, 2018 . In February 2016, the FASB issued ASU 2016-02, Leases ("ASU 2016-02"). ASU 2016-02 requires lessees to recognize the assets and liabilities on their balance sheet for the rights and obligations created by leases and continue to recognize expenses on their income statements over the lease term. It also requires disclosures designed to give financial statement users information on the amount, timing, and uncertainty of cash flows arising from leases. The Company adopted this standard effective January 1, 2019 using the modified retrospective transition method. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company elected the package of transition practical expedients for existing contracts. Adoption of the new standard resulted in the recording of right-of-use assets of $22.6 million and lease liabilities of $28.8 million , as of January 1, 2019. The difference between the right-of-use assets and lease liabilities relates to deferred and prepaid rent balances, the net impact of which reduced the right-of-use assets. The adoption of the standard did not impact the Company's consolidated net earnings and had no impact on cash flows. Refer to Note 12 - Leases for additional information related to the Company’s lease obligations. Recently Issued Accounting Standards In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract. This standard aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The standard is effective for annual and interim periods beginning after December 15, 2019, with early adoption permitted. The Company is currently evaluating the impact of the adoption of this standard on its consolidated financial statements.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue Recognition The Company accounts for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers . The Company primarily sells services in the form of “Software-as-a-Service” ("SaaS") and "Hardware-as-a-Service" ("HaaS") offerings as well as maintenance and support ("M&S") and professional services consisting of implementation, training, migration, protection and consulting. The Company also sells products in the form of on-premise data protection and migration software and hardware on a standalone basis. Revenues related to services are recorded over the performance period of the service. Revenues from product licenses and hardware sales are recorded when control of the product has been transferred to the customer. Disaggregation of Revenue The following tables depict disaggregated revenue for the three and six months ended June 30, 2019 and 2018 , by type, customer type, sales channel, timing of revenue recognition, and geography (in thousands): Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Products Services Total Products Services Total Customer type Consumer $ — $ 51,658 $ 51,658 $ (6 ) $ 23,997 $ 23,991 Business 7,079 62,773 69,852 8,926 44,817 53,743 Total $ 7,079 $ 114,431 $ 121,510 $ 8,920 $ 68,814 $ 77,734 Sales channel Direct $ 937 $ 60,393 $ 61,330 $ 1,038 $ 45,995 $ 47,033 Indirect 6,142 54,038 60,180 7,882 22,819 30,701 Total $ 7,079 $ 114,431 $ 121,510 $ 8,920 $ 68,814 $ 77,734 Timing of revenue recognition Transferred at a point in time $ 7,079 $ — $ 7,079 $ 8,920 $ — $ 8,920 Transferred over time — 114,431 114,431 — 68,814 68,814 Total $ 7,079 $ 114,431 $ 121,510 $ 8,920 $ 68,814 $ 77,734 Geography United States $ 2,999 $ 98,833 $ 101,832 $ 3,644 $ 61,013 $ 64,657 Other 4,080 15,598 19,678 5,276 7,801 13,077 Total $ 7,079 $ 114,431 $ 121,510 $ 8,920 $ 68,814 $ 77,734 Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Products Services Total Products Services Total Customer type Consumer $ — $ 78,990 $ 78,990 $ — $ 44,940 $ 44,940 Business 16,791 106,944 123,735 18,372 78,448 96,820 Total $ 16,791 $ 185,934 $ 202,725 $ 18,372 $ 123,388 $ 141,760 Sales channel Direct $ 2,903 $ 108,986 $ 111,889 $ 2,081 $ 83,876 $ 85,957 Indirect 13,888 76,948 90,836 16,291 39,512 55,803 Total $ 16,791 $ 185,934 $ 202,725 $ 18,372 $ 123,388 $ 141,760 Timing of revenue recognition Transferred at a point in time $ 16,791 $ — $ 16,791 $ 18,372 $ — $ 18,372 Transferred over time — 185,934 185,934 — 123,388 123,388 Total $ 16,791 $ 185,934 $ 202,725 $ 18,372 $ 123,388 $ 141,760 Geography United States $ 6,080 $ 162,579 $ 168,659 $ 8,294 $ 110,010 $ 118,304 Other 10,711 23,355 34,066 10,078 13,378 23,456 Total $ 16,791 $ 185,934 $ 202,725 $ 18,372 $ 123,388 $ 141,760 Contract Assets and Liabilities Contract assets are rights to consideration in exchange for goods or services that the entity has transferred to a customer when that right is conditional on something other than the passage of time. Contract assets are transferred to accounts receivable once the rights become unconditional. As of June 30, 2019 and December 31, 2018 , the Company did not have contract assets. Contract liabilities (deferred revenue) primarily consist of billings and payments received in advance of revenue recognition. The Company primarily bills and collects payments from customers for its services in advance on a monthly and annual basis. The Company initially records fees associated with performance obligations delivered over time as deferred revenue and then recognizes revenue as performance obligations are satisfied. The Company classifies deferred revenue as current or noncurrent based on the timing revenue recognition. Changes in contract liabilities for the six months ended June 30, 2019 are as follows (in thousands): Deferred Revenue (Current) Deferred Revenue (Noncurrent) Balance as of December 31, 2018 $ 121,553 $ 29,151 Increase, net 58,500 14,576 Balance as of June 30, 2019 $ 180,053 $ 43,727 For the three and six months ended June 30, 2019 , revenue recognized related to deferred revenue at December 31, 2018 was approximately $38.6 million and $87.3 million , respectively. In addition, for the three and six months ended June 30, 2019 , the Company recognized $27.3 million and $29.3 million of revenue from deferred revenue related to the acquisition of Webroot, respectively. On June 30, 2019 , the Company had $274.0 million of remaining performance obligations. This amount does not include any variable consideration for sales or usage-based royalties. The Company expects to recognize 56.0% of its remaining performance obligations as revenue during the year ended December 31, 2019 , an additional 34.0% during the year ended December 31, 2020 and the remaining balance thereafter. Accounts Receivable, Net Accounts receivable, net, are amounts due from customers where there is an unconditional right to consideration. Unbilled receivables of $9.6 million and $3.9 million are included in this balance at June 30, 2019 and December 31, 2018 , respectively. The payment of consideration related to these unbilled receivables is conditioned only on the passage of time.

Net (Loss) Income per Share

Net (Loss) Income per Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Net (Loss) Income per Share	Net (Loss) Income Per Share Basic net (loss) income per share is calculated by dividing net (loss) income by the weighted average number of common shares outstanding during the period. Diluted net (loss) income per share is calculated by dividing net (loss) income by the sum of the weighted average number of common shares and potentially dilutive securities outstanding during the period using the treasury stock method. For the periods in which the Company incurs a net loss, the effect of the Company's outstanding common stock equivalents is not included in the calculation of diluted net loss per share as they would be anti-dilutive. The following table sets forth the computation of basic and diluted net (loss) income per share: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands, except per share data) Numerator: Net (loss) income $ (11,274 ) $ (5,687 ) $ (9,271 ) $ 6,257 Denominator: Weighted average common shares outstanding, basic 34,459 28,628 34,313 28,486 Effect of potential dilutive common shares — — — 2,400 Weighted average shares outstanding, diluted 34,459 28,628 34,313 30,886 Basic net (loss) income per share $ (0.33 ) $ (0.20 ) $ (0.27 ) $ 0.22 Diluted net (loss) income per share $ (0.33 ) $ (0.20 ) $ (0.27 ) $ 0.20 The Company has the ability and intent to settle the principal of the convertible senior notes (the "Convertible Notes"), issued in April 2017, in cash. As the Company's common stock price exceeded the $25.84 conversion price during the six months ended June 30, 2018 , the Company has included the dilutive effect of shares in excess of the principal amount in the calculation of diluted net income per share as of June 30, 2018 , using the treasury stock method. Since the Company incurred a net loss during the three months ended June 30, 2018, the dilutive effect of shares in excess of the principal amount have been excluded in the calculation as they are anti-dilutive. The Company's stock price did not exceed the conversion price during the three and six months ended June 30, 2019 , therefore the impact of the Convertible Notes was excluded from the calculation of diluted net income per share. The following options to purchase common shares, restricted stock units/awards and shares of common stock purchasable under the Company’s 2017 Employee Stock Purchase Plan (“2017 ESPP”) have been excluded from the computation of diluted net (loss) income per share because they had an anti-dilutive impact, or because they related to share-based awards that were contingently issuable, for which the applicable vesting conditions had not been satisfied (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Options to purchase common shares 1 1,017 1,053 1,017 — Restricted stock units/awards 2,664 1,902 2,664 93 Total 3,681 2,955 3,681 93 (1) This balance includes shares purchasable under the Company's 2017 ESPP which were determined to be anti-dilutive.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Derivative Instruments Non-designated Foreign Currency Contracts The Company uses foreign currency forward contracts as part of its strategy to manage exposure related to Euro denominated intercompany monetary assets and liabilities. The Company has not designated these forward contracts as hedging instruments . Accordingly, the Company recorded the fair value of these contracts at the end of each reporting period in the condensed consolidated balance sheets, with changes in the fair value recorded in earnings as other income (expense), net in the condensed consolidated statements of operations. Cash flows from the settlement of these non-designated foreign currency contracts are reported in cash flows from investing activities. These currency forward contracts are entered into for periods consistent with currency transaction exposures, generally less than one year . At June 30, 2019 and December 31, 2018 , the Company had outstanding contracts with a total notional value of $44.2 million and $43.8 million , respectively. The following table provides a quantitative summary of the fair value of derivative instruments not designated as hedging instruments as of June 30, 2019 and December 31, 2018 (in thousands): Fair Value Description Balance Sheet Classification June 30, 2019 December 31, 2018 Derivative liabilities: Non-designated hedging instruments Foreign currency contracts Accrued expenses and other current liabilities $ 740 $ 195 Total derivative liabilities $ 740 $ 195 The following table summarizes the (losses) gains related to derivative instruments not designated as hedging instruments for the three and six months ended June 30, 2019 and 2018 (in thousands): Three Months Ended June 30, Six Months Ended June 30, Description Location in Statement of Operations 2019 2018 2019 2018 Foreign currency contracts Other income (expense), net $ (338 ) $ 2,580 $ 787 $ 1,509 Other Fair Value Measurements and Disclosures The Company applies the guidance in ASC 820, Fair Value Measurements and Disclosures , (“ASC 820”), which provides that fair value is based on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. In order to increase consistency and comparability in fair value measurements, ASC 820 establishes a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value into three broad levels, which are described below: Level 1: Quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs. Level 2: Other inputs that are observable directly or indirectly, such as quoted prices for similar assets and liabilities or market corroborated inputs. Level 3: Unobservable inputs are used when little or no market data is available, which requires the Company to develop its own assumptions about how market participants would value the assets or liabilities. The fair value hierarchy gives the lowest priority to Level 3 inputs. In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible in its assessment of fair value. The Company’s assets and liabilities that are measured at fair value on a recurring basis, by level, within the fair value hierarchy are summarized as follows (in thousands): June 30, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Cash equivalents - money market funds $ 41,925 $ — $ — $ 41,925 $ 156,200 $ — $ — $ 156,200 Total $ 41,925 $ — $ — $ 41,925 $ 156,200 $ — $ — $ 156,200 Liabilities: Foreign currency exchange contracts — 740 — $ 740 — 195 — $ 195 Total $ — $ 740 $ — $ 740 $ — $ 195 $ — $ 195 The Company’s investments in money market funds are classified within Level 1 of the fair value hierarchy because they are valued using quoted market prices. The Company's foreign currency exchange contracts are classified as Level 2 within the fair value hierarchy as they are valued using professional pricing sources for identical or comparable instruments, rather than direct observations of quoted prices in active markets. No assets or liabilities are classified as Level 3 within the fair value hierarchy. The Company estimates the fair value of its Convertible Notes and Term Loans using quoted market prices in inactive markets on the last trading day of the reporting period. The Convertible Notes and Term Loans have been classified as Level 2 within the fair value hierarchy. The principal amount, carrying value (the carrying value of the Convertible Notes excludes the equity component) and related estimated fair value of the Company's Convertible Notes and Term Loans reported in the condensed consolidated balance sheets as of June 30, 2019 and December 31, 2018 are as follows (in thousands): June 30, 2019 December 31, 2018 Principal Carrying Value Fair Value Principal Carrying Value Fair Value Convertible notes $ 143,750 $ 121,766 $ 174,297 $ 143,750 $ 118,305 $ 168,287 Term loans $ 495,000 $ 476,535 $ 495,000 $ — $ — $ — The carrying amounts for cash and cash equivalents, accounts receivable, and accounts payable and accrued expenses are carried at cost, which approximates fair value. Non-Recurring Fair Value Measures Certain non-financial assets, such as goodwill, intangible assets and property and equipment, are measured at fair value on a non-recurring basis when there are identifiable events or changes in circumstances that may have a significant adverse impact on the fair value of these assets. Such fair value measures are considered to be within the Level 3 valuation hierarchy due to the subjective nature of the unobservable inputs used. During the six months ended June 30, 2018 , the Company recorded an impairment charge of $0.7 million related to internally developed software costs which were no longer recoverable as the project was discontinued. The Company recorded the impairment charge in the cost of revenue, research and development, sales and marketing, and general and administrative captions in the condensed consolidated statements of operations. There were no impairment charges during the six months ended June 30, 2019 .

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Acquisitions	Acquisitions Acquisition-Related Expenses In the three months ended June 30, 2019 and 2018 , acquisition-related expenses were $0.4 million and $2.2 million , respectively. In the six months ended June 30, 2019 and 2018 , acquisition-related expenses were $9.9 million and $5.5 million , respectively. Acquisition-related expenses have been included primarily in general and administrative expenses in the condensed consolidated statements of operations. The Company's current year acquisition costs relate to the acquisition of Webroot and the prior year acquisition costs relate to the acquisition of Mozy. 2019 Acquisition On February 7, 2019, the Company entered into an agreement and plan of merger (the "Agreement") to acquire Webroot. Pursuant to the Agreement, on March 26, 2019, the Company completed the acquisition of all of the issued and outstanding capital stock of Webroot, a next-generation online and cloud-based security and threat intelligence provider for consumers and businesses, for a purchase price of $621.7 million in cash, net of cash acquired and working capital adjustments. The purchase price was funded with cash on hand and funds secured under a new credit facility (refer to Note 15 - Borrowings and Credit Arrangements ). The acquisition of Webroot has been accounted for as a business combination and the Company has recorded the assets acquired and liabilities assumed at their respective fair values as of the acquisition date. The purchase price allocation is considered preliminary, and additional adjustments may be recorded during the measurement period in accordance with FASB’s guidance regarding business combinations. The purchase price allocation will be finalized as the Company receives additional information relevant to the acquisition, including the final valuation and reconciliation of the assets purchased, including tangible and intangible assets, liabilities assumed, and the related impact to the deferred tax assets and liabilities. During the second quarter of 2019, the Company recorded measurement period adjustments in its condensed consolidated balance sheet associated with receiving additional information regarding the opening balance sheet as of March 26, 2019, the date of acquisition. The measurement period adjustments resulted in an increase in goodwill of $2.1 million with the offset to various assets and liabilities, including an increase in intangible assets of $6.1 million . The following tables summarize the preliminary purchase price allocation, which reflects the measurement period adjustments recorded in the second quarter of 2019 (in thousands): Fair value of consideration transferred: Cash, net of cash acquired $ 622,009 Working capital receivable (306 ) Fair value of total acquisition consideration $ 621,703 Fair value of assets acquired and liabilities assumed: Accounts receivable $ 18,951 Prepaid and other current assets 12,137 Property and equipment 11,949 Right-of-use lease assets 27,892 Other assets 4,998 Intangible assets 326,252 Goodwill 388,509 Total assets acquired 790,688 Accounts payable (3,786 ) Accrued liabilities (21,952 ) Deferred revenues (58,108 ) Long-term lease liabilities (28,304 ) Deferred tax liability (53,844 ) Other long-term liabilities (2,991 ) Net assets acquired $ 621,703 The Company engaged a third-party valuation firm to assist in the valuation of intangible assets consisting of customer relationships, developed technology and internal-use technology, and the Webroot trade name as well as in the valuation of deferred revenue and property and equipment. The fair values of the remaining Webroot assets and liabilities noted above approximate their carrying values at March 26, 2019. In connection with the acquisition of Webroot, goodwill of $388.5 million was recognized for the excess purchase price over the fair value of the net assets acquired. The Company believes the goodwill related to the acquisition will enable the Company to leverage its technology in the broader market, as well as offering cross-selling market exposure opportunities. Goodwill from the acquisition of Webroot is included within the Company’s one reporting unit and will be included in the annual review for impairment. Goodwill is not deductible for tax purposes as this acquisition was a stock purchase. The significant intangible assets identified in the purchase price allocation discussed above include developed technology, customer relationships, trade names, and internal-use technology which are amortized over their estimated useful lives based on the pattern of consumption of the economic benefits or, if that pattern cannot be readily determined, on a straight-line basis. Customer relationships represent the underlying relationships with certain customers to provide ongoing services for products sold. To value the customer relationship asset, the Company utilized the income approach, specifically a discounted cash-flow method known as the excess earnings method. Developed technology consists of products that have reached technological feasibility and trade names represent acquired company and product names. The developed technology and trade name intangibles were valued using a relief from royalty method, which considers both the market approach and the income approach. Internal-use technology consists of developed tools used internally to assist the Company in generating revenue. The internal-use technology was valued using the replacement cost approach. The following table presents the estimated fair values and useful lives of the identifiable intangible assets acquired and risk-adjusted discount rates used in the valuation: Amount (in thousands) Weighted Average Useful Life (in years) Risk-Adjusted Discount Rates used in Valuation 1 Developed technology $ 128,000 6.8 14.0% Customer relationships 176,100 10.7 15.0% - 17.5% Trade names 18,400 4.0 14.0% Internal-use technology 3,752 2.0 17.5% Total identifiable intangible assets $ 326,252 (1) Note that acquired internal-use technology was valued using the replacement cost approach which uses an estimated market return rate as opposed to a risk-adjusted discount rate. For the three and six months ended June 30, 2019 , the operating results of Webroot, which are included in the Company's condensed consolidated statements of operations since the date of acquisition, are comprised of $46.6 million and $49.3 million of revenue and $43.5 million and $46.6 million of expenses, excluding amortization expense, respectively. Pro Forma Financial Information The following unaudited pro forma information presents the condensed consolidated results of operations of the Company and Webroot for the six month periods ended June 30, 2019 and 2018 and the three month period ended June 30, 2018 as if the acquisition of Webroot had been completed on January 1, 2018. There was no pro forma impact during the three months ended June 30, 2019 . These pro forma condensed consolidated financial results have been prepared for comparative purposes only and include certain adjustments that reflect pro forma results of operations, such as increased amortization for the fair value of acquired intangible assets, fair value adjustment for deferred revenue, additional annual interest expense resulting from interest on the Company's new credit facility (as further described in Note 15 - Borrowings and Credit Arrangements ) to finance the acquisition of Webroot, reversal of depreciation expense resulting from the application of fair value measurement to acquired property and equipment, reversal of interest income earned from cash on hand used to fund the acquisition, adjustments for share-based compensation, adjustments for contract costs in connection with the adoption of Topic 606, and adjustments relating to the tax effect of combining the Carbonite and Webroot businesses. The unaudited pro forma results do not reflect any operating efficiencies or potential cost savings which may result from the consolidation of the operations of the Company and Webroot. Accordingly, these unaudited pro forma results are presented for informational purposes only and are not necessarily indicative of the results of operations that actually would have been achieved had the acquisition occurred as of January 1, 2018, nor are they intended to represent or be indicative of future results of operations (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2018 2019 2018 Pro forma revenue $ 123,086 $ 258,616 $ 228,647 Pro forma net loss $ (20,502 ) $ (7,057 ) $ (24,720 ) Pro forma net loss per common share: Basic and diluted $ (0.72 ) $ (0.21 ) $ (0.87 ) 2018 Acquisition On February 12, 2018, the Company entered into a definitive Master Acquisition Agreement ("the Mozy Agreement") with EMC Corporation (“EMC”), Mozy and Dell Technologies, Inc. Pursuant to the Mozy Agreement, on March 19, 2018, the Company completed the acquisition of all of the issued and outstanding capital stock of Mozy, a cloud backup service for consumers and businesses, and certain related business assets owned by EMC or its affiliates, for a purchase price of $144.6 million in cash, net of cash acquired. The purchase price was funded with cash on hand and funds available under the Company’s previous revolving credit facility that has since been repaid and terminated. In connection with the acquisition of Mozy, the Company negotiated a transition services agreement to cover certain consulting, technology and engineering services for up to eighteen months post close. The acquisition of Mozy has been accounted for as a business combination and the Company has recorded the assets acquired and liabilities assumed at their respective fair values as of the acquisition date. The following table summarizes the final purchase price allocation (in thousands): Fair value of consideration transferred: Cash, net of cash acquired $ 144,597 Fair value of total acquisition consideration $ 144,597 Fair value of assets acquired and liabilities assumed: Accounts receivable $ 1,629 Prepaid and other current assets 872 Property and equipment 7,169 Other assets 242 Intangible assets 96,400 Goodwill 74,753 Total assets acquired 181,065 Accounts payable (141 ) Accrued liabilities (417 ) Deferred revenues (19,740 ) Deferred tax liability (16,170 ) Net assets acquired $ 144,597 The Company engaged a third-party valuation firm to assist in the valuation of intangible assets consisting of customer relationships, developed technology and the Mozy trade name as well as in the valuation of deferred revenue and property and equipment. The fair values of the remaining Mozy assets and liabilities noted above approximate their carrying values at March 19, 2018. The Company believes the goodwill related to the acquisition was a result of the ability of the Company to leverage its technology in the broader market, as well as offering cross-selling market exposure opportunities. Goodwill from the acquisition of Mozy is included within the Company’s one reporting unit and will be included in the annual review for impairment. Goodwill is not deductible for tax purposes as this acquisition was a stock purchase. The significant intangible assets identified in the purchase price allocation discussed above include customer relationships, developed technology, and trade names which are amortized over their estimated useful lives based on the pattern of consumption of the economic benefits or, if that pattern cannot be readily determined, on a straight-line basis. Customer relationships represent the underlying relationships with certain customers to provide ongoing services for products sold. To value the customer relationship asset, the Company utilized the income approach, specifically a discounted cash-flow method known as the excess earnings method. Developed technology consists of products that have reached technological feasibility and trade names represent acquired company and product names. The developed technology intangible was valued using a relief from royalty method, which considers both the market approach and the income approach. The trade name intangible was valued using the replacement cost/lost profits methodology. The following table presents the estimated fair values and useful lives of the identifiable intangible assets acquired and risk-adjusted discount rates used in the valuation: Amount (in thousands) Weighted Average Useful Life (in years) Risk-Adjusted Discount Rates used in Valuation Developed technology $ 8,700 2.0 12.5% Customer relationships 87,200 7.0 16.5 - 17.5% Trade names 500 2.0 12.5% Total identifiable intangible assets $ 96,400 Pro Forma Financial Information The following unaudited pro forma information presents the condensed consolidated results of operations of the Company and Mozy for the six month period ended June 30, 2018 as if the acquisition of Mozy had been completed on January 1, 2018. These pro forma condensed consolidated financial results have been prepared for comparative purposes only and include certain adjustments that reflect pro forma results of operations, such as increased amortization for the fair value of acquired intangible assets, fair value adjustment for deferred revenue, additional annual interest expense resulting from interest on the previous revolving credit facility to finance the acquisition of Mozy, reversal of depreciation expense resulting from the application of fair value measurement to acquired property and equipment and adjustments relating to the tax effect of combining the Carbonite and Mozy businesses. The unaudited pro forma results do not reflect any operating efficiencies or potential cost savings which may result from the consolidation of the operations of the Company and Mozy. Accordingly, these unaudited pro forma results are presented for informational purposes only and are not necessarily indicative of the results of operations that actually would have been achieved had the acquisition occurred as of January 1, 2018, nor are they intended to represent or be indicative of future results of operations (in thousands): Six Months Ended June 30, 2018 Pro forma revenue $ 156,768 Pro forma net income $ 9,395 Pro forma net income per common share: Basic $ 0.33 Diluted $ 0.30

Goodwill and Acquired Intangibl

Goodwill and Acquired Intangible Assets	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Acquired Intangible Assets	Goodwill and Acquired Intangible Assets The following is a rollforward of the Company's goodwill balance (in thousands): Goodwill Balance as of December 31, 2018 $ 155,086 Goodwill acquired 388,509 Effect of foreign exchange rates (71 ) Balance as of June 30, 2019 $ 543,524 Acquired intangible assets consist of the following (in thousands): June 30, 2019 December 31, 2018 Weighted- Average Estimated Useful Life (in years) Gross Carrying Value Accumulated Amortization Net Carrying Value Gross Carrying Value Accumulated Amortization Net Carrying Value Technology-related 6.1 $ 187,023 $ 38,906 $ 148,117 $ 59,018 $ 26,551 $ 32,467 Customer relationships 9.3 273,116 24,857 248,259 96,997 13,398 83,599 Trade names 3.8 22,156 3,962 18,194 3,752 1,855 1,897 Internal-use technology 2.0 3,752 495 3,257 — — — Total 5.3 $ 486,047 $ 68,220 $ 417,827 $ 159,767 $ 41,804 $ 117,963 The Company recorded amortization expense of $18.8 million and $8.0 million for the three months ended June 30, 2019 and 2018 , respectively; and $26.4 million and $11.3 million for the six months ended June 30, 2019 and 2018 , respectively. Amortization relating to developed technology is recorded within a separate line within cost of revenue and amortization of customer relationships, trade names and internal-use technology are recorded within a separate line within operating expenses. Future estimated amortization expense of acquired intangibles as of June 30, 2019 is as follows (in thousands): Remainder of 2019 $ 38,278 2020 70,269 2021 65,728 2022 57,012 2023 48,883 Thereafter 137,657 $ 417,827

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	6 Months Ended
	Jun. 30, 2019
Payables and Accruals [Abstract]
Accrued Expenses	Accrued Expenses and Other Current Liabilities The components of accrued expenses and other current liabilities are as follows (in thousands): June 30, 2019 December 31, 2018 Accrued tax liabilities $ 4,520 $ 4,588 Accrued consulting and professional fees 4,329 3,103 Accrued sales and marketing 2,186 1,606 Accrued hosting 2,143 764 Accrued interest 1,070 980 Accrued facilities 1,018 1,807 Accrued other expenses 6,429 2,801 Total accrued expenses 21,695 15,649 Current portion of long-term lease liabilities 7,512 — Derivative liability 740 195 Total other current liabilities 8,252 195 Total accrued expenses and other current liabilities $ 29,947 $ 15,844

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2019
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders' Equity Share Repurchase Program On November 19, 2018, the Company's Board of Directors authorized a $50.0 million share repurchase program in lieu of the previous program that expired in May 2018. Share repurchases are made from time-to-time in the open market, in privately negotiated transactions or otherwise, in accordance with applicable securities laws and regulations. The timing and amount of any share repurchases are determined by the Company's management based on evaluation of market conditions, the trading price of the stock, and other factors. The Company did not make any repurchases under the programs during the six months ended June 30, 2019 and 2018 . At June 30, 2019 , approximately $28.5 million remained available under the Company's share repurchase program.

Stock-based Awards

Stock-based Awards	6 Months Ended
	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Stock-based Awards	Stock-based Awards Employee Stock Purchase Plan On May 18, 2017, the Company's stockholders approved the 2017 ESPP. Under the 2017 ESPP, eligible employees may purchase shares of the Company's common stock, subject to certain limitations, at the lesser of 85% of the beginning or ending withholding period fair market value as defined in the 2017 ESPP. There are two six-month withholding periods in each fiscal year. As of June 30, 2019 , rights to acquire 346,984 shares of common stock were available for issuance under the 2017 ESPP. Stock-based Compensation Expense Stock-based compensation is reflected in the consolidated statement of operations as follows (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Cost of revenues $ 478 $ 413 $ 902 $ 738 Research and development 1,611 1,047 2,557 1,734 General and administrative 2,290 2,494 4,248 4,618 Sales and marketing 1,133 787 2,010 1,388 Total stock-based compensation expense $ 5,512 $ 4,741 $ 9,717 $ 8,478

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company's effective income tax rates were 29.9% and (69.8)% for the three months ended June 30, 2019 and 2018 , respectively. The Company's effective income tax rates were 56.5% and 172.6% for the six months ended June 30, 2019 and 2018 , respectively. The Company's effective income tax rate is based upon estimated income before provision for income taxes for the year, composition of the income in different countries, and adjustments, if any, in the applicable quarterly periods for potential tax consequences, benefits and/or resolutions of tax audits or other tax contingencies. For the six months ended June 30, 2019 and 2018 , the effective income tax rate varied from the statutory income tax rate principally due to the release of U.S. valuation allowance as a result of the acquisitions of Webroot and Mozy, respectively. The tax benefit recognized during the six months ended June 30, 2019 and 2018 , consists of a tax benefit for a U.S. valuation allowance release that is partially offset by foreign tax expense. The Company's effective income tax rate in the three and six months ended June 30, 2019 differed from the three and six months ended June 30, 2018 , primarily due to the amount of valuation allowance that was released related to acquired intangibles and changes to the loss from operations before income taxes. The U.S. net deferred tax liability primarily relates to non-tax deductible intangible assets recognized in the financial statements which generate a deferred tax liability. The net deferred tax liability established represents a source of income and provides evidence of the realizability of previously unrecognized deferred tax assets in the U.S. Therefore, the Company has recorded a discrete tax benefit of $6.8 million and $16.2 million in the six months ended June 30, 2019 and 2018 , respectively, for the release of valuation allowance related to the deferred tax liability recorded in purchase accounting. As of June 30, 2019 , the U.S. no longer maintains a full valuation allowance as it is in a net deferred tax liability position with the addition of Webroot to the U.S. combined group. As of June 30, 2019 , the Company maintained a valuation allowance of $2.1 million related specifically to deferred tax assets for state research and development credits for which the realizability remains uncertain.

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Leases The Company leases office space to support business activities such as information technology, research and development, product support, development and management, sales and general administration. The Company also leases data center space to store and protect customer data. The Company's office leases expire at varying dates through December 31, 2029 . The Company's data center leases expire at varying dates through January 31, 2023 . On January 1, 2019, the Company adopted ASU 2016-02, Leases using the modified retrospective transition method. The Company has elected an accounting policy to forgo the recognition of lease assets or liabilities for short-term leases. Short-term leases are defined, in accordance with the standard, as those with terms of one year or less and do not include an option to purchase the underlying asset that the lessee is reasonably certain to exercise. The Company also elected the package of practical expedients which applies to leases that commenced before the adoption date. By electing the package of practical expedients, the Company did not reassess: whether any existing contracts are or contain leases, the lease classification for any existing leases and initial direct costs for any existing leases. The Company has also elected to combine lease and non-lease components when calculating minimum lease payments on new leases for all asset classes. However, in accordance with the standard, variable payments will be excluded from the calculation of lease assets and liabilities. The Company makes variable payments on certain of its leases related to taxes, insurance, utilities, and common area maintenance ("CAM"), among other things. The Company reviews new contracts as they are executed to identify leases. The Company determines if an arrangement is a lease at the inception of a contract based on whether the contract, or a part of the contract, conveys the right to control the use of a specified asset for a period of time in exchange for consideration. The Company measures right-of-use assets and liabilities at the lease commencement date based on the net present value of fixed lease payments over the lease term. The lease term includes options to extend or terminate the lease when it is reasonably certain that the Company will exercise those options. Right-of-use assets also include any advance lease payments made and exclude lease incentives. The Company was unable to readily determine the implicit rate on its operating leases. As a result, the Company elected to use incremental borrowing rates based on the information available at the commencement date in determining the present value of lease payments. The incremental borrowing rates reflect the rates of interest that the Company would have to pay to borrow an amount equal to the lease payments on a collateralized basis, over a similar term, and in a similar economic environment. Lease expense is recognized on a straight-line basis over the lease term. Pursuant to the lease agreement for the Company's corporate headquarters in Boston, Massachusetts, the Company has posted a security deposit of $0.8 million , which is maintained as a letter of credit. Pursuant to the lease agreement for the Webroot office located in Broomfield, Colorado, the Company is required to maintain a bank guarantee in the amount of $2.0 million until December 31, 2020, at which point the guarantee begins reducing. This guarantee is considered restricted cash and is included within other assets on the condensed consolidated balance sheet. Operating lease right-of-use assets and long-term operating lease liabilities are included as separate lines in the condensed consolidated balance sheets. The current portion of operating lease liabilities are included in accrued expenses and other current liabilities in the condensed consolidated balance sheets. In connection with the acquisition of Webroot on March 26, 2019, the Company recorded right-of-use assets of $27.9 million and lease liabilities of $28.3 million on the condensed consolidated balance sheet. As of June 30, 2019 , right-of-use lease assets were $48.3 million and lease liabilities were $54.3 million . Of the total lease liabilities as of June 30, 2019 , $7.5 million were classified as current. For the three and six months ended June 30, 2019 , the components of lease expense were as follows: Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 (in thousands) Office Leases Data Center Leases Total Office Leases Data Center Leases Total Operating lease costs $ 2,321 $ 914 $ 3,235 $ 3,135 $ 1,830 $ 4,965 Variable lease costs 830 584 1,414 1,080 1,187 2,267 Short-term lease costs 228 373 601 481 465 946 Total lease costs $ 3,379 $ 1,871 $ 5,250 $ 4,696 $ 3,482 $ 8,178 For the six months ended June 30, 2019 , cash flows related to leases were as follows: (in thousands) Six Months Ended June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Office leases $ 3,423 Data center leases 1,796 $ 5,219 Right-of-use assets obtained in exchange for lease obligations 1 : Office leases $ 43,062 Data center leases 8,760 $ 51,822 (1) Includes the impact of Topic 842 adoption and leases recorded as part of the Webroot acquisition. The following table summarizes the weighted average remaining lease terms and discount rates associated with the Company's leases as of June 30, 2019 : Office Leases Data Center Leases Operating Leases: Weighted average remaining lease term (in years) 7.3 2.6 Weighted-average discount rate 6.60 % 5.95 % Maturity of lease liabilities under all operating leases as of June 30, 2019 , are as follows (in thousands): Years Ended December 31, Office Leases Data Center Leases Total Undiscounted Cash Flows Remainder of 2019 $ 2,478 $ 1,788 $ 4,266 2020 6,770 3,532 10,302 2021 9,789 2,139 11,928 2022 8,656 833 9,489 2023 7,673 70 7,743 Thereafter 26,438 — 26,438 Total lease payments 61,804 8,362 70,166 Less: imputed interest 15,300 604 15,904 Total lease liabilities $ 46,504 $ 7,758 $ 54,262 As previously disclosed in the 2018 Annual Report on Form 10-K and under the previous lease accounting standard, ASC 840, Leases , the total commitment for non-cancellable operating leases as of December 31, 2018 was as follows (in thousands): Years Ended December 31, Office Leases Data Center Leases 1 Total 2019 $ 4,194 $ 4,833 $ 9,027 2020 3,975 4,434 8,409 2021 3,888 2,133 6,021 2022 3,713 833 4,546 2023 3,655 70 3,725 Thereafter 5,183 — 5,183 Total $ 24,608 $ 12,303 $ 36,911 (1) Certain amounts in the table above relating to colocation leases for the Company's servers include usage-based charges in addition to base rent. Rent expense was $2.2 million and $4.4 million for the three and six months ended June 30, 2018 , respectively. As of December 31, 2018 , $4.5 million was included in accrued expenses and other current liabilities and other long-term liabilities related to deferred rent.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Other Non-cancellable Commitments As of June 30, 2019 , the Company had non-cancellable commitments to vendors primarily consisting of hosted software, consulting, advertising, marketing and broadband services contracts, as follows (in thousands): Years Ended December 31, Remainder of 2019 $ 16,944 2020 9,975 2021 4,405 2022 1,667 Total $ 32,991 Litigation On February 27, 2017, a non-practicing entity named Realtime Data LLC (“Realtime Data”) filed a lawsuit against the Company in the U.S. District Court for the Eastern District of Texas, alleging that the Company’s cloud storage services infringe upon certain patents held by Realtime Data. Realtime Data’s complaint against the Company sought damages in an unspecified amount and injunctive relief. On December 19, 2017, the United States District Court for the Eastern District of Texas transferred the case to the United States District Court of Massachusetts. Realtime Data has filed patent suits against several other companies around the country, and one or more of the asserted patents are currently in various stages of other litigations and/or United States Patent and Trademark Office ("USPTO") post-grant proceedings (or appeals therefrom). No trial date has been set. The Company is defending itself vigorously. The Company has not accrued a loss contingency related to this matter because litigation related to a non-practicing entity is inherently unpredictable. Although a loss is reasonably possible, an unfavorable outcome is not considered by management to be probable at this time and the Company remains unable to reasonably estimate a possible loss or range of loss associated with this litigation. The Company is from time to time subject to various other legal proceedings and claims, either asserted or unasserted, which arise in the ordinary course of business. The Company routinely assesses its current litigation and/or threatened litigation as to the probability of ultimately incurring a liability, and records its best estimate of the ultimate loss if reasonably possible to estimate, in situations where the Company assesses the likelihood of loss as probable. While the outcome of these other claims cannot be predicted with certainty, management does not believe that the outcome of any of these other legal matters will have a material adverse effect on the Company’s condensed consolidated financial statements.

Restructuring

Restructuring	6 Months Ended
	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Activities Disclosure [Text Block]	Restructuring During the six months ended June 30, 2019 , the Company incurred $0.7 million in employee severance restructuring charges as a result of the acquisition of Webroot. The following table summarizes the Company's restructuring activities for the six months ended June 30, 2019 (in thousands): Employee Severance and Related Costs Accrued restructuring as of December 31, 2018 $ — Charges 702 Cash payments (702 ) Accrued restructuring as of June 30, 2019 $ — In October 2017, the Company initiated a restructuring program ("2017 Plan") to streamline operations and reduce operating costs. The 2017 plan was completed in the fourth quarter of 2018. The Company incurred restructuring charges totaling $1.8 million related to employee severance under the 2017 plan. Of these charges, $0.9 million were incurred in the six months ended June 30, 2018 .

Borrowings and Credit Arrangeme

Borrowings and Credit Arrangements	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Borrowings and Credit Arrangements	Borrowings and Credit Arrangements 2019 Credit Agreement On March 26, 2019, in connection with the acquisition of Webroot, the Company entered into a credit agreement (the "Credit Agreement") with Barclays Bank PLC as administrative agent and certain other lenders, for a seven-year senior secured term loan facility of $550.0 million (the "Term Loans") and a five-year secured revolving credit facility of $130.0 million , including a $15.0 million sub-limit for letters of credit and a $15.0 million sub-limit for swingline loans (the "2019 Revolver"). The facilities under the Credit Agreement are secured by substantially all of the Company’s assets and contain customary affirmative and negative covenants, including, among others, certain limitations on the incurrence of indebtedness, guarantees and liens, the making of investments, acquisitions and dispositions, the payment of dividends and the repurchase of capital stock and the repayment, redemption or amendment of subordinated debt. Upon execution of the Credit Agreement, the Company terminated its previously executed revolving credit facility entered into on March 19, 2018 (the "2018 Revolver"). In accordance with ASC 470-50, Debt Modifications and Exchanges, during the six months ended June 30, 2019 , the Company wrote off $0.8 million of unamortized debt issuance costs associated with the 2018 Revolver, which is included within interest expense on the condensed consolidated statement of operations. Term Loans The Term Loans were issued at 99.0% of their face amount and will mature on the earlier of March 26, 2026 or, 91 days prior to the maturity of the Company’s outstanding Convertible Notes, to the extent that, on such date: (1) the Convertible Notes have not been repurchased (and cancelled), redeemed, defeased, repaid, satisfied and discharged or refinanced, (2) the maturity date of the Convertible Notes has not been extended beyond June 26, 2026, and (3) the Company's liquidity is not in excess of the amount required to repay the Convertible Notes at such time plus $20 million . The Term Loans bear interest at a variable rate calculated as LIBOR plus an applicable margin, as defined in the Credit Agreement. As of June 30, 2019 , the interest rate was 6.152% . On May 28, 2019, the Company made a principal payment in the amount of $55.0 million . The remaining outstanding principal amount is due upon maturity. As of June 30, 2019 the Term Loans consisted of the following: June 30, 2019 Principal $ 495,000 Less: debt issuance costs (3,794 ) Less: debt discount (14,671 ) Long-term debt, net $ 476,535 Revolving Credit Facility The 2019 Revolver matures on the earlier of March 26, 2024 or, 91 days prior to the maturity of the Company’s outstanding Convertible Notes, to the extent that, on such date: (1) the Convertible Notes have not been repurchased (and cancelled), redeemed, defeased, repaid, satisfied and discharged or refinanced, (2) the maturity date of the Convertible Notes has not been extended beyond June 26, 2024, and (3) the Company's liquidity is not in excess of the amount required to repay the Convertible Notes at such time plus $20 million . Borrowings under the 2019 Revolver bear interest at a variable rate calculated as LIBOR plus an applicable margin, as defined in the Credit Agreement. The 2019 Revolver contains a financial covenant ratio that the Company must satisfy as of the end of any fiscal quarter when borrowings under the facility exceed a specified percentage of the total availability. As of June 30, 2019 , the Company had no outstanding borrowings under the 2019 Revolver. Convertible Notes On April 4, 2017, the Company issued, in a private offering, $143.8 million aggregate principal amount of Convertible Notes. The Convertible Notes accrue interest at 2.5% per year, payable semiannually in arrears on April 1 and October 1 of each year. The Convertible Notes will mature on April 1, 2022, unless earlier repurchased, redeemed or converted. The conversion rate for the Convertible Notes is initially 38.7034 shares of Company’s common stock per $1,000 principal amount of Convertible Notes, which is equivalent to an initial conversion price of approximately $25.84 per share of common stock. Prior to January 1, 2022, the Convertible Notes will be convertible by the holders only upon satisfaction of the following conditions and during following periods: 1. During any calendar quarter, if the last reported sale price of the Company's common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; 2. During the five business day period after any five consecutive trading day period (the “Measurement Period”) in which the trading price per $1,000 principal amount of notes for each trading day of the Measurement Period was less than 98% of the product of the last reported sale price of the Company's common stock and the conversion rate on each such trading day; 3. If the Company calls any or all of the notes for redemption at any time prior to the close of business on the second scheduled trading day immediately preceding the redemption date; and 4. Upon the occurrence of certain specified corporate events. On or after January 1, 2022 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their notes at any time. The Company may satisfy any conversion obligations by paying or delivering, as the case may be, cash, shares of its common stock or a combination of cash and shares of its common stock, at the Company's election in the manner and subject to the terms and conditions provided in the indenture governing the Convertible Notes. The Company may redeem for cash all or any portion of the Convertible Notes, at its option, on or after April 5, 2020 if the last reported sale price of the Company's common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive), during any 30 consecutive trading day period ending on the trading day immediately preceding the date on which the Company provides notice of redemption at a redemption price equal to 100% of the principal amount of the Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. The Company received $138.7 million in proceeds from the issuance of the Convertible Notes, net of debt issuance costs and the discounts to the initial purchasers. The Company used $39.2 million of the proceeds to repay all amounts outstanding under its previous revolving credit facility and $15.0 million of the proceeds to repurchase shares of its common stock from purchasers of Convertible Notes in privately negotiated transactions effected through one or more of the initial purchasers or their affiliates conducted concurrently with the pricing of the Convertible Notes. The remaining proceeds will be used for general corporate purposes, including potential acquisitions. In accordance with ASC 470-20, Debt with Conversion and Other Options , the Company separated the Convertible Notes into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar liability that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the par value of the Convertible Notes as a whole. The excess of the principal amount of the liability component over its carrying amount (“debt discount”) is amortized to interest expense over the term of the Convertible Notes. The equity component is included in the additional paid-in-capital portion of stockholders’ equity on the Company’s consolidated balance sheet and is not remeasured as long as it continues to meet the conditions for equity classification. In addition, the debt issuance costs and debt discount are allocated between the liability and equity components in proportion to the allocation of the proceeds. The issuance costs and discount allocated to the liability component are capitalized as a reduction of the principal amount of the Convertible Notes payable on the Company’s balance sheet and amortized, using the effective-interest method, as additional interest expense over the term of the Convertible Notes. The issuance costs and discount allocated to the equity component are recorded as a reduction to additional paid-in capital. The Convertible Notes consisted of the following (in thousands): June 30, 2019 December 31, 2018 Liability component: Principal $ 143,750 $ 143,750 Less: debt issuance costs (496 ) (573 ) Less: debt discount (21,488 ) (24,872 ) Net carrying amount $ 121,766 $ 118,305 Equity component $ 31,451 $ 31,451 For the three and six months ended June 30, 2019 and 2018 , the Company incurred total interest expense associated with the Convertible Notes as follows (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Interest expense related to contractual interest coupon $ 898 $ 898 $ 1,797 $ 1,797 Interest expense related to accretion of the discount 1,700 1,558 3,383 3,101 Interest expense related to debt issuance costs 39 36 78 72 Total $ 2,637 $ 2,492 $ 5,258 $ 4,970 The effective interest rate on the Convertible Notes, including amortization of debt issuance costs and accretion of the discount, is 8.7% . At June 30, 2019 , the conversion option value of the Convertible Notes does not exceed their principal amount since the closing market price of the Company's common stock does not exceed the conversion rate. As of June 30, 2019 , the Convertible Notes were not convertible.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events [Text Block]	16. Subsequent Events On August 1, 2019, a purported stockholder of the Company filed a purported class action complaint against the Company, our former Chief Executive Officer and our Chief Financial Officer in the U.S. District Court for the District of Massachusetts. The complaint alleges violations of the federal securities laws under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, and Rule 10b-5 promulgated thereunder. We believe that the allegations contained in the complaint are without merit and intend to defend the case vigorously. We cannot predict at this point the length of time that this action will be ongoing or whether it is reasonably possible that a loss will be incurred.

Summary of Significant Accounti

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Recently Adopted and Recently Issued Accounting Standards	Recently Adopted Accounting Standards The Company's significant accounting policies are presented in Note 2 - Summary of Significant Accounting Policies , in the Company's Annual Report on Form 10-K for fiscal year ended December 31, 2018 filed with the SEC on February 28, 2019. Summarized below are the accounting pronouncements adopted subsequent to December 31, 2018 . In February 2016, the FASB issued ASU 2016-02, Leases ("ASU 2016-02"). ASU 2016-02 requires lessees to recognize the assets and liabilities on their balance sheet for the rights and obligations created by leases and continue to recognize expenses on their income statements over the lease term. It also requires disclosures designed to give financial statement users information on the amount, timing, and uncertainty of cash flows arising from leases. The Company adopted this standard effective January 1, 2019 using the modified retrospective transition method. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company elected the package of transition practical expedients for existing contracts. Adoption of the new standard resulted in the recording of right-of-use assets of $22.6 million and lease liabilities of $28.8 million , as of January 1, 2019. The difference between the right-of-use assets and lease liabilities relates to deferred and prepaid rent balances, the net impact of which reduced the right-of-use assets. The adoption of the standard did not impact the Company's consolidated net earnings and had no impact on cash flows. Refer to Note 12 - Leases for additional information related to the Company’s lease obligations. Recently Issued Accounting Standards In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract. This standard aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The standard is effective for annual and interim periods beginning after December 15, 2019, with early adoption permitted. The Company is currently evaluating the impact of the adoption of this standard on its consolidated financial statements.
Revenue Recognition	The Company accounts for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers . The Company primarily sells services in the form of “Software-as-a-Service” ("SaaS") and "Hardware-as-a-Service" ("HaaS") offerings as well as maintenance and support ("M&S") and professional services consisting of implementation, training, migration, protection and consulting. The Company also sells products in the form of on-premise data protection and migration software and hardware on a standalone basis. Revenues related to services are recorded over the performance period of the service. Revenues from product licenses and hardware sales are recorded when control of the product has been transferred to the customer.
Other Fair Value Measurements	The Company applies the guidance in ASC 820, Fair Value Measurements and Disclosures , (“ASC 820”), which provides that fair value is based on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. In order to increase consistency and comparability in fair value measurements, ASC 820 establishes a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value into three broad levels, which are described below: Level 1: Quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs. Level 2: Other inputs that are observable directly or indirectly, such as quoted prices for similar assets and liabilities or market corroborated inputs. Level 3: Unobservable inputs are used when little or no market data is available, which requires the Company to develop its own assumptions about how market participants would value the assets or liabilities. The fair value hierarchy gives the lowest priority to Level 3 inputs. In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible in its assessment of fair value.
Leases	The Company leases office space to support business activities such as information technology, research and development, product support, development and management, sales and general administration. The Company also leases data center space to store and protect customer data. The Company's office leases expire at varying dates through December 31, 2029 . The Company's data center leases expire at varying dates through January 31, 2023 . On January 1, 2019, the Company adopted ASU 2016-02, Leases using the modified retrospective transition method. The Company has elected an accounting policy to forgo the recognition of lease assets or liabilities for short-term leases. Short-term leases are defined, in accordance with the standard, as those with terms of one year or less and do not include an option to purchase the underlying asset that the lessee is reasonably certain to exercise. The Company also elected the package of practical expedients which applies to leases that commenced before the adoption date. By electing the package of practical expedients, the Company did not reassess: whether any existing contracts are or contain leases, the lease classification for any existing leases and initial direct costs for any existing leases. The Company has also elected to combine lease and non-lease components when calculating minimum lease payments on new leases for all asset classes. However, in accordance with the standard, variable payments will be excluded from the calculation of lease assets and liabilities. The Company makes variable payments on certain of its leases related to taxes, insurance, utilities, and common area maintenance ("CAM"), among other things. The Company reviews new contracts as they are executed to identify leases. The Company determines if an arrangement is a lease at the inception of a contract based on whether the contract, or a part of the contract, conveys the right to control the use of a specified asset for a period of time in exchange for consideration. The Company measures right-of-use assets and liabilities at the lease commencement date based on the net present value of fixed lease payments over the lease term. The lease term includes options to extend or terminate the lease when it is reasonably certain that the Company will exercise those options. Right-of-use assets also include any advance lease payments made and exclude lease incentives. The Company was unable to readily determine the implicit rate on its operating leases. As a result, the Company elected to use incremental borrowing rates based on the information available at the commencement date in determining the present value of lease payments. The incremental borrowing rates reflect the rates of interest that the Company would have to pay to borrow an amount equal to the lease payments on a collateralized basis, over a similar term, and in a similar economic environment. Lease expense is recognized on a straight-line basis over the lease term.

Basis of Presentation Restricte

Basis of Presentation Restricted Cash (Tables)	6 Months Ended
	Jun. 30, 2019
Supplemental Cash Flow Elements [Abstract]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	The following tables summarizes the Company's cash, cash equivalents and restricted cash for the period presented: June 30, 2019 Cash and cash equivalents $ 83,378 Restricted cash, included in other assets 2,439 Total cash, cash equivalents and restricted cash $ 85,817

Revenue Recognition Diaggregati

Revenue Recognition Diaggregation of Revenue (Tables)	6 Months Ended
	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue	The following tables depict disaggregated revenue for the three and six months ended June 30, 2019 and 2018 , by type, customer type, sales channel, timing of revenue recognition, and geography (in thousands): Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Products Services Total Products Services Total Customer type Consumer $ — $ 51,658 $ 51,658 $ (6 ) $ 23,997 $ 23,991 Business 7,079 62,773 69,852 8,926 44,817 53,743 Total $ 7,079 $ 114,431 $ 121,510 $ 8,920 $ 68,814 $ 77,734 Sales channel Direct $ 937 $ 60,393 $ 61,330 $ 1,038 $ 45,995 $ 47,033 Indirect 6,142 54,038 60,180 7,882 22,819 30,701 Total $ 7,079 $ 114,431 $ 121,510 $ 8,920 $ 68,814 $ 77,734 Timing of revenue recognition Transferred at a point in time $ 7,079 $ — $ 7,079 $ 8,920 $ — $ 8,920 Transferred over time — 114,431 114,431 — 68,814 68,814 Total $ 7,079 $ 114,431 $ 121,510 $ 8,920 $ 68,814 $ 77,734 Geography United States $ 2,999 $ 98,833 $ 101,832 $ 3,644 $ 61,013 $ 64,657 Other 4,080 15,598 19,678 5,276 7,801 13,077 Total $ 7,079 $ 114,431 $ 121,510 $ 8,920 $ 68,814 $ 77,734 Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Products Services Total Products Services Total Customer type Consumer $ — $ 78,990 $ 78,990 $ — $ 44,940 $ 44,940 Business 16,791 106,944 123,735 18,372 78,448 96,820 Total $ 16,791 $ 185,934 $ 202,725 $ 18,372 $ 123,388 $ 141,760 Sales channel Direct $ 2,903 $ 108,986 $ 111,889 $ 2,081 $ 83,876 $ 85,957 Indirect 13,888 76,948 90,836 16,291 39,512 55,803 Total $ 16,791 $ 185,934 $ 202,725 $ 18,372 $ 123,388 $ 141,760 Timing of revenue recognition Transferred at a point in time $ 16,791 $ — $ 16,791 $ 18,372 $ — $ 18,372 Transferred over time — 185,934 185,934 — 123,388 123,388 Total $ 16,791 $ 185,934 $ 202,725 $ 18,372 $ 123,388 $ 141,760 Geography United States $ 6,080 $ 162,579 $ 168,659 $ 8,294 $ 110,010 $ 118,304 Other 10,711 23,355 34,066 10,078 13,378 23,456 Total $ 16,791 $ 185,934 $ 202,725 $ 18,372 $ 123,388 $ 141,760

Revenue Recognition Customer Co

Revenue Recognition Customer Contracts, Assets and Liabilities (Tables)	6 Months Ended
	Jun. 30, 2019
Contract with Customer, Asset and Liability [Line Items]
Contract with Customer, Asset and Liability	Changes in contract liabilities for the six months ended June 30, 2019 are as follows (in thousands): Deferred Revenue (Current) Deferred Revenue (Noncurrent) Balance as of December 31, 2018 $ 121,553 $ 29,151 Increase, net 58,500 14,576 Balance as of June 30, 2019 $ 180,053 $ 43,727

Net (Loss) Income per Share (Ta

Net (Loss) Income per Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computation of basic and diluted net (loss) income per share: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands, except per share data) Numerator: Net (loss) income $ (11,274 ) $ (5,687 ) $ (9,271 ) $ 6,257 Denominator: Weighted average common shares outstanding, basic 34,459 28,628 34,313 28,486 Effect of potential dilutive common shares — — — 2,400 Weighted average shares outstanding, diluted 34,459 28,628 34,313 30,886 Basic net (loss) income per share $ (0.33 ) $ (0.20 ) $ (0.27 ) $ 0.22 Diluted net (loss) income per share $ (0.33 ) $ (0.20 ) $ (0.27 ) $ 0.20
Dilutive Common Stock Equivalents Excluded from Computation of Diluted Weighted-Average Shares Outstanding	The following options to purchase common shares, restricted stock units/awards and shares of common stock purchasable under the Company’s 2017 Employee Stock Purchase Plan (“2017 ESPP”) have been excluded from the computation of diluted net (loss) income per share because they had an anti-dilutive impact, or because they related to share-based awards that were contingently issuable, for which the applicable vesting conditions had not been satisfied (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Options to purchase common shares 1 1,017 1,053 1,017 — Restricted stock units/awards 2,664 1,902 2,664 93 Total 3,681 2,955 3,681 93 (1) This balance includes shares purchasable under the Company's 2017 ESPP which were determined to be anti-dilutive.

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location	The following table provides a quantitative summary of the fair value of derivative instruments not designated as hedging instruments as of June 30, 2019 and December 31, 2018 (in thousands): Fair Value Description Balance Sheet Classification June 30, 2019 December 31, 2018 Derivative liabilities: Non-designated hedging instruments Foreign currency contracts Accrued expenses and other current liabilities $ 740 $ 195 Total derivative liabilities $ 740 $ 195
Derivative Instruments, Gain (Loss)	The following table summarizes the (losses) gains related to derivative instruments not designated as hedging instruments for the three and six months ended June 30, 2019 and 2018 (in thousands): Three Months Ended June 30, Six Months Ended June 30, Description Location in Statement of Operations 2019 2018 2019 2018 Foreign currency contracts Other income (expense), net $ (338 ) $ 2,580 $ 787 $ 1,509
Assets and Liabilities Measured at Fair Value on Recurring Basis	The Company’s assets and liabilities that are measured at fair value on a recurring basis, by level, within the fair value hierarchy are summarized as follows (in thousands): June 30, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Cash equivalents - money market funds $ 41,925 $ — $ — $ 41,925 $ 156,200 $ — $ — $ 156,200 Total $ 41,925 $ — $ — $ 41,925 $ 156,200 $ — $ — $ 156,200 Liabilities: Foreign currency exchange contracts — 740 — $ 740 — 195 — $ 195 Total $ — $ 740 $ — $ 740 $ — $ 195 $ — $ 195
Fair Value, Assets Measured on Recurring and Non Recurring Basis	The principal amount, carrying value (the carrying value of the Convertible Notes excludes the equity component) and related estimated fair value of the Company's Convertible Notes and Term Loans reported in the condensed consolidated balance sheets as of June 30, 2019 and December 31, 2018 are as follows (in thousands): June 30, 2019 December 31, 2018 Principal Carrying Value Fair Value Principal Carrying Value Fair Value Convertible notes $ 143,750 $ 121,766 $ 174,297 $ 143,750 $ 118,305 $ 168,287 Term loans $ 495,000 $ 476,535 $ 495,000 $ — $ — $ —

Acquisitions Webroot (Tables)

Acquisitions Webroot (Tables) - Webroot [Member]	6 Months Ended
	Jun. 30, 2019
Business Acquisition [Line Items]
Schedule of Business Acquisitions, by Acquisition	The following tables summarize the preliminary purchase price allocation, which reflects the measurement period adjustments recorded in the second quarter of 2019 (in thousands): Fair value of consideration transferred: Cash, net of cash acquired $ 622,009 Working capital receivable (306 ) Fair value of total acquisition consideration $ 621,703 Fair value of assets acquired and liabilities assumed: Accounts receivable $ 18,951 Prepaid and other current assets 12,137 Property and equipment 11,949 Right-of-use lease assets 27,892 Other assets 4,998 Intangible assets 326,252 Goodwill 388,509 Total assets acquired 790,688 Accounts payable (3,786 ) Accrued liabilities (21,952 ) Deferred revenues (58,108 ) Long-term lease liabilities (28,304 ) Deferred tax liability (53,844 ) Other long-term liabilities (2,991 ) Net assets acquired $ 621,703
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination	The following table presents the estimated fair values and useful lives of the identifiable intangible assets acquired and risk-adjusted discount rates used in the valuation: Amount (in thousands) Weighted Average Useful Life (in years) Risk-Adjusted Discount Rates used in Valuation 1 Developed technology $ 128,000 6.8 14.0% Customer relationships 176,100 10.7 15.0% - 17.5% Trade names 18,400 4.0 14.0% Internal-use technology 3,752 2.0 17.5% Total identifiable intangible assets $ 326,252 (1) Note that acquired internal-use technology was valued using the replacement cost approach which uses an estimated market return rate as opposed to a risk-adjusted discount rate.
Business Acquisition, Pro Forma Information	Accordingly, these unaudited pro forma results are presented for informational purposes only and are not necessarily indicative of the results of operations that actually would have been achieved had the acquisition occurred as of January 1, 2018, nor are they intended to represent or be indicative of future results of operations (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2018 2019 2018 Pro forma revenue $ 123,086 $ 258,616 $ 228,647 Pro forma net loss $ (20,502 ) $ (7,057 ) $ (24,720 ) Pro forma net loss per common share: Basic and diluted $ (0.72 ) $ (0.21 ) $ (0.87 )

Acquisitions Mozy (Tables)

Acquisitions Mozy (Tables) - Mozy [Member]	6 Months Ended
	Jun. 30, 2018
Business Acquisition [Line Items]
Schedule of Business Acquisitions, by Acquisition	The following table summarizes the final purchase price allocation (in thousands): Fair value of consideration transferred: Cash, net of cash acquired $ 144,597 Fair value of total acquisition consideration $ 144,597 Fair value of assets acquired and liabilities assumed: Accounts receivable $ 1,629 Prepaid and other current assets 872 Property and equipment 7,169 Other assets 242 Intangible assets 96,400 Goodwill 74,753 Total assets acquired 181,065 Accounts payable (141 ) Accrued liabilities (417 ) Deferred revenues (19,740 ) Deferred tax liability (16,170 ) Net assets acquired $ 144,597
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination	The following table presents the estimated fair values and useful lives of the identifiable intangible assets acquired and risk-adjusted discount rates used in the valuation: Amount (in thousands) Weighted Average Useful Life (in years) Risk-Adjusted Discount Rates used in Valuation Developed technology $ 8,700 2.0 12.5% Customer relationships 87,200 7.0 16.5 - 17.5% Trade names 500 2.0 12.5% Total identifiable intangible assets $ 96,400
Business Acquisition, Pro Forma Information	Accordingly, these unaudited pro forma results are presented for informational purposes only and are not necessarily indicative of the results of operations that actually would have been achieved had the acquisition occurred as of January 1, 2018, nor are they intended to represent or be indicative of future results of operations (in thousands): Six Months Ended June 30, 2018 Pro forma revenue $ 156,768 Pro forma net income $ 9,395 Pro forma net income per common share: Basic $ 0.33 Diluted $ 0.30

Goodwill and Acquired Intangi_2

Goodwill and Acquired Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The following is a rollforward of the Company's goodwill balance (in thousands): Goodwill Balance as of December 31, 2018 $ 155,086 Goodwill acquired 388,509 Effect of foreign exchange rates (71 ) Balance as of June 30, 2019 $ 543,524
Purchased Intangible Assets	Acquired intangible assets consist of the following (in thousands): June 30, 2019 December 31, 2018 Weighted- Average Estimated Useful Life (in years) Gross Carrying Value Accumulated Amortization Net Carrying Value Gross Carrying Value Accumulated Amortization Net Carrying Value Technology-related 6.1 $ 187,023 $ 38,906 $ 148,117 $ 59,018 $ 26,551 $ 32,467 Customer relationships 9.3 273,116 24,857 248,259 96,997 13,398 83,599 Trade names 3.8 22,156 3,962 18,194 3,752 1,855 1,897 Internal-use technology 2.0 3,752 495 3,257 — — — Total 5.3 $ 486,047 $ 68,220 $ 417,827 $ 159,767 $ 41,804 $ 117,963
Future Estimated Amortization Expense of Acquired Intangibles	Future estimated amortization expense of acquired intangibles as of June 30, 2019 is as follows (in thousands): Remainder of 2019 $ 38,278 2020 70,269 2021 65,728 2022 57,012 2023 48,883 Thereafter 137,657 $ 417,827

Accrued Expenses and Other Cu_2

Accrued Expenses and Other Current Liabilities (Tables)	6 Months Ended
	Jun. 30, 2019
Payables and Accruals [Abstract]
Accrued Expenses	The components of accrued expenses and other current liabilities are as follows (in thousands): June 30, 2019 December 31, 2018 Accrued tax liabilities $ 4,520 $ 4,588 Accrued consulting and professional fees 4,329 3,103 Accrued sales and marketing 2,186 1,606 Accrued hosting 2,143 764 Accrued interest 1,070 980 Accrued facilities 1,018 1,807 Accrued other expenses 6,429 2,801 Total accrued expenses 21,695 15,649 Current portion of long-term lease liabilities 7,512 — Derivative liability 740 195 Total other current liabilities 8,252 195 Total accrued expenses and other current liabilities $ 29,947 $ 15,844

Stock-based Awards (Tables)

Stock-based Awards (Tables)	6 Months Ended
	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation Reflected in Condensed Consolidated Statement of Operations	Stock-based compensation is reflected in the consolidated statement of operations as follows (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Cost of revenues $ 478 $ 413 $ 902 $ 738 Research and development 1,611 1,047 2,557 1,734 General and administrative 2,290 2,494 4,248 4,618 Sales and marketing 1,133 787 2,010 1,388 Total stock-based compensation expense $ 5,512 $ 4,741 $ 9,717 $ 8,478

Leases (Tables)

Leases (Tables)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Schedule Of Operating Leases [Line Items]
Lease, Cost	For the three and six months ended June 30, 2019 , the components of lease expense were as follows: Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 (in thousands) Office Leases Data Center Leases Total Office Leases Data Center Leases Total Operating lease costs $ 2,321 $ 914 $ 3,235 $ 3,135 $ 1,830 $ 4,965 Variable lease costs 830 584 1,414 1,080 1,187 2,267 Short-term lease costs 228 373 601 481 465 946 Total lease costs $ 3,379 $ 1,871 $ 5,250 $ 4,696 $ 3,482 $ 8,178
Cash Paid and Right-of-use Assets Obtained	For the six months ended June 30, 2019 , cash flows related to leases were as follows: (in thousands) Six Months Ended June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Office leases $ 3,423 Data center leases 1,796 $ 5,219 Right-of-use assets obtained in exchange for lease obligations 1 : Office leases $ 43,062 Data center leases 8,760 $ 51,822 (1) Includes the impact of Topic 842 adoption and leases recorded as part of the Webroot acquisition.
Operating Lease, Weighted Average Remaining Lease Term and Discount Rate	The following table summarizes the weighted average remaining lease terms and discount rates associated with the Company's leases as of June 30, 2019 : Office Leases Data Center Leases Operating Leases: Weighted average remaining lease term (in years) 7.3 2.6 Weighted-average discount rate 6.60 % 5.95 %
Lessee, Operating Lease, Liability, Maturity	Maturity of lease liabilities under all operating leases as of June 30, 2019 , are as follows (in thousands): Years Ended December 31, Office Leases Data Center Leases Total Undiscounted Cash Flows Remainder of 2019 $ 2,478 $ 1,788 $ 4,266 2020 6,770 3,532 10,302 2021 9,789 2,139 11,928 2022 8,656 833 9,489 2023 7,673 70 7,743 Thereafter 26,438 — 26,438 Total lease payments 61,804 8,362 70,166 Less: imputed interest 15,300 604 15,904 Total lease liabilities $ 46,504 $ 7,758 $ 54,262
Schedule of Future Minimum Rental Payments for Operating Leases		As previously disclosed in the 2018 Annual Report on Form 10-K and under the previous lease accounting standard, ASC 840, Leases , the total commitment for non-cancellable operating leases as of December 31, 2018 was as follows (in thousands): Years Ended December 31, Office Leases Data Center Leases 1 Total 2019 $ 4,194 $ 4,833 $ 9,027 2020 3,975 4,434 8,409 2021 3,888 2,133 6,021 2022 3,713 833 4,546 2023 3,655 70 3,725 Thereafter 5,183 — 5,183 Total $ 24,608 $ 12,303 $ 36,911 (1) Certain amounts in the table above relating to colocation leases for the Company's servers include usage-based charges in addition to base rent.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Unrecorded Unconditional Purchase Obligations Disclosure	As of June 30, 2019 , the Company had non-cancellable commitments to vendors primarily consisting of hosted software, consulting, advertising, marketing and broadband services contracts, as follows (in thousands): Years Ended December 31, Remainder of 2019 $ 16,944 2020 9,975 2021 4,405 2022 1,667 Total $ 32,991

Restructuring 2019 Rollforward

Restructuring 2019 Rollforward (Tables)	6 Months Ended
	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	The following table summarizes the Company's restructuring activities for the six months ended June 30, 2019 (in thousands): Employee Severance and Related Costs Accrued restructuring as of December 31, 2018 $ — Charges 702 Cash payments (702 ) Accrued restructuring as of June 30, 2019 $ —

Borrowings and Credit Arrange_2

Borrowings and Credit Arrangements Outstanding Borrowings (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Instrument [Line Items]
Term Loan Schedule	As of June 30, 2019 the Term Loans consisted of the following: June 30, 2019 Principal $ 495,000 Less: debt issuance costs (3,794 ) Less: debt discount (14,671 ) Long-term debt, net $ 476,535
Convertible Debt	The Convertible Notes consisted of the following (in thousands): June 30, 2019 December 31, 2018 Liability component: Principal $ 143,750 $ 143,750 Less: debt issuance costs (496 ) (573 ) Less: debt discount (21,488 ) (24,872 ) Net carrying amount $ 121,766 $ 118,305 Equity component $ 31,451 $ 31,451
Convertible Debt Interest Expense	For the three and six months ended June 30, 2019 and 2018 , the Company incurred total interest expense associated with the Convertible Notes as follows (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Interest expense related to contractual interest coupon $ 898 $ 898 $ 1,797 $ 1,797 Interest expense related to accretion of the discount 1,700 1,558 3,383 3,101 Interest expense related to debt issuance costs 39 36 78 72 Total $ 2,637 $ 2,492 $ 5,258 $ 4,970

Basis of Presentation Restric_2

Basis of Presentation Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 83,378	$ 198,087
Restricted cash, included in other assets	2,439
Total cash, cash equivalents and restricted cash	$ 85,817	$ 198,087	$ 70,982	$ 128,231

Basis of Presentation Reclassif

Basis of Presentation Reclassifications (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Reclassifications [Abstract]
Prior Period Reclassification Adjustment	$ 1.5

Basis of Presentation Recently

Basis of Presentation Recently Adopted Accounting Standards (Details) - Accounting Standards Update 2016-02 [Member] $ in Millions	Jan. 01, 2019USD ($)
Lease - Right of Use Asset [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 22.6
Lease - Lease Liability [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 28.8

Revenue Recognition Disaggregat

Revenue Recognition Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Product	$ 7,079	$ 8,920	$ 16,791	$ 18,372
Services	114,431	68,814	185,934	123,388
Revenues	121,510	77,734	202,725	141,760
Consumer [Member]
Disaggregation of Revenue [Line Items]
Product	0	(6)	0	0
Services	51,658	23,997	78,990	44,940
Revenues	51,658	23,991	78,990	44,940
Business [Member]
Disaggregation of Revenue [Line Items]
Product	7,079	8,926	16,791	18,372
Services	62,773	44,817	106,944	78,448
Revenues	69,852	53,743	123,735	96,820
Sales Channel, Directly to Consumer [Member]
Disaggregation of Revenue [Line Items]
Product	937	1,038	2,903	2,081
Services	60,393	45,995	108,986	83,876
Revenues	61,330	47,033	111,889	85,957
Sales Channel, Through Intermediary [Member]
Disaggregation of Revenue [Line Items]
Product	6,142	7,882	13,888	16,291
Services	54,038	22,819	76,948	39,512
Revenues	60,180	30,701	90,836	55,803
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Product	7,079	8,920	16,791	18,372
Services	0	0	0	0
Revenues	7,079	8,920	16,791	18,372
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Product	0	0	0	0
Services	114,431	68,814	185,934	123,388
Revenues	114,431	68,814	185,934	123,388
UNITED STATES
Disaggregation of Revenue [Line Items]
Product	2,999	3,644	6,080	8,294
Services	98,833	61,013	162,579	110,010
Revenues	101,832	64,657	168,659	118,304
Non-US [Member]
Disaggregation of Revenue [Line Items]
Product	4,080	5,276	10,711	10,078
Services	15,598	7,801	23,355	13,378
Revenues	$ 19,678	$ 13,077	$ 34,066	$ 23,456

Revenue Recognition Contract wi

Revenue Recognition Contract with Customer, Asset and Liability (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Contract with Customer, Asset and Liability [Line Items]
Balance as of December 31, 2018 (Current)	$ 121,553
Balance as of December 31, 2018 (Noncurrent)	29,151
Increase (Decrease) in Deferred Revenue, Current	58,500
Increase (Decrease) in Deferred Revenue, Noncurrent	14,576
Balance as of June 30, 2019 (Current)	180,053
Balance as of June 30, 2019 (Noncurrent)	$ 43,727

Revenue Recognition Additional

Revenue Recognition Additional Details (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognized on Beginning Deferred Balance	$ 38.6	$ 87.3
Revenue Recognized on Acquired Deferred Revenue	27.3	29.3
Revenue, Remaining Performance Obligation, Amount	$ 274	$ 274
Revenue, Remaining Performance, Obligation, Expected Recognition Percentage, Year One	56.00%	56.00%
Revenue, Remaining Performance, Obligation, Expected Recognition Percentage, Year Two	34.00%	34.00%
Unbilled Receivables, Current	$ 9.6	$ 9.6	$ 3.9

Net (Loss) Income per Share - S

Net (Loss) Income per Share - Schedule of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net (loss) income	$ (11,274)	$ (5,687)	$ (9,271)	$ 6,257
Weighted Average Number of Shares Outstanding, Basic	34,459,359	28,628,173	34,312,971	28,485,695
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0	0	0	2,400,000
Weighted Average Number of Shares Outstanding, Diluted	34,459,359	28,628,173	34,312,971	30,885,633
Earnings Per Share, Basic	$ (0.33)	$ (0.20)	$ (0.27)	$ 0.22
Earnings Per Share, Diluted	$ (0.33)	$ (0.20)	$ (0.27)	$ 0.20

Net (Loss) Income per Share - A

Net (Loss) Income per Share - Additional Details (Details)	Apr. 04, 2017$ / shares
Earnings Per Share [Abstract]
Debt Instrument, Convertible, Conversion Price $/share	$ 25.84

Net (Loss) Income per Share - D

Net (Loss) Income per Share - Dilutive Common Stock Equivalents Excluded from Computation of Diluted Weighted-Average Shares Outstanding (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive common stock equivalents excluded from the computation of diluted weighted-average shares (in shares)	3,681	2,955	3,681	93
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive common stock equivalents excluded from the computation of diluted weighted-average shares (in shares)	1,017	1,053	1,017	0
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive common stock equivalents excluded from the computation of diluted weighted-average shares (in shares)	2,664	1,902	2,664	93

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Quantitative Summary of Fair Value of Derivative Instruments Not Designated as Hedging Instruments (Details) - Non-designated hedging instruments - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative Liability	$ 740	$ 195
Foreign currency contracts
Derivatives, Fair Value [Line Items]
Currency forward contract period (generally less than)	1 year
Currency forward contracts notional value	$ 44,200	$ 43,800

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - (Losses) Gains on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other income (expense), net | Foreign currency contracts | Non-designated hedging instruments
Derivative Instruments, (Loss) Gain [Line Items]
Derivative, (Loss) Gain	$ (338)	$ 2,580	$ 787	$ 1,509

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Assets:
Total	$ 41,925	$ 156,200
Liabilities:
Total	740	195
Foreign currency exchange contracts
Liabilities:
Foreign currency exchange contracts	740	195
Cash equivalents - money market funds
Assets:
Cash equivalents - money market funds	41,925	156,200
Level 1
Assets:
Total	41,925	156,200
Liabilities:
Total	0	0
Level 1 | Foreign currency exchange contracts
Liabilities:
Foreign currency exchange contracts	0	0
Level 1 | Cash equivalents - money market funds
Assets:
Cash equivalents - money market funds	41,925	156,200
Level 2
Assets:
Total	0	0
Liabilities:
Total	740	195
Level 2 | Foreign currency exchange contracts
Liabilities:
Foreign currency exchange contracts	740	195
Level 2 | Cash equivalents - money market funds
Assets:
Cash equivalents - money market funds	0	0
Level 3
Assets:
Total	0	0
Liabilities:
Total	0	0
Level 3 | Foreign currency exchange contracts
Liabilities:
Foreign currency exchange contracts	0	0
Level 3 | Cash equivalents - money market funds
Assets:
Cash equivalents - money market funds	$ 0	$ 0

Fair Value of Financial Instr_6

Fair Value of Financial Instruments - Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 26, 2019	Dec. 31, 2018	Apr. 04, 2017
Convertible Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Principal	$ 143,750		$ 143,750	$ 143,800
Convertible Debt	121,766		118,305
Debt Instrument, Fair Value	174,297		168,287
Term Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Principal	495,000	$ 550,000	0
Debt Instrument, Fair Value	495,000		0
Term Loan	$ 476,535		$ 0

Fair Value of Financial Instr_7

Fair Value of Financial Instruments - Non-Recurring Fair Value Measures (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of Ongoing Project	$ 0.7

Acquisitions Webroot Identifiab

Acquisitions Webroot Identifiable Assets Acquired and Liabilities Assumed (Details) - Webroot [Member] $ in Thousands	Mar. 26, 2019USD ($)
Business Acquisition [Line Items]
Cash, net of cash acquired	$ 622,009
Purchase Price Working Capital Receivable	(306)
Total Consideration Transferred	621,703
Accounts receivable	18,951
Prepaid and other current assets	12,137
Property and equipment	11,949
Right of use lease assets	27,892
Other Noncurrent Assets	4,998
Intangible assets	326,252
Goodwill	388,509
Total Assets Acquired	790,688
Accounts payable	(3,786)
Accrued liabilities	(21,952)
Deferred revenue	(58,108)
Lease Liabilities	(28,304)
Deferred tax liability	(53,844)
Other long-term liabilities	(2,991)
Net Assets Acquired	$ 621,703

Acquisitions Webroot Finite-Liv

Acquisitions Webroot Finite-Lived Intangibles Acquired (Details) - USD ($) $ in Thousands	Mar. 26, 2019	Jun. 30, 2019
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		5 years 3 months 18 days
Developed Technology
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		6 years 1 month 6 days
Trade Names
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years 9 months 18 days
Internal-use Technology
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		2 years
Webroot [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 326,252
Webroot [Member] | Developed Technology
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 128,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 9 months 18 days
Webroot [Member] | Customer Relationships
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 176,100
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years 8 months 12 days
Webroot [Member] | Trade Names
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 18,400
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	4 years
Webroot [Member] | Internal-use Technology
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 3,752
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years
Risk-Adjusted Discount Rates used in Valuation | Webroot [Member] | Developed Technology
Business Acquisition [Line Items]
Risk-Adjusted Discount Rates used in Valuation	14.00%
Risk-Adjusted Discount Rates used in Valuation | Webroot [Member] | Trade Names
Business Acquisition [Line Items]
Risk-Adjusted Discount Rates used in Valuation	14.00%
Risk-Adjusted Discount Rates used in Valuation | Webroot [Member] | Internal-use Technology
Business Acquisition [Line Items]
Risk-Adjusted Discount Rates used in Valuation	17.50%
Risk-Adjusted Discount Rates used in Valuation | Minimum [Member] | Webroot [Member] | Customer Relationships
Business Acquisition [Line Items]
Risk-Adjusted Discount Rates used in Valuation	15.00%
Risk-Adjusted Discount Rates used in Valuation | Maximum [Member] | Webroot [Member] | Customer Relationships
Business Acquisition [Line Items]
Risk-Adjusted Discount Rates used in Valuation	17.50%

Acquisitions Webroot Pro Forma

Acquisitions Webroot Pro Forma Information (Details) - Webroot [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Business Acquisition [Line Items]
Pro Forma Revenue	$ 123,086	$ 258,616	$ 228,647
Pro Forma Net Loss	$ (20,502)	$ (7,057)	$ (24,720)
Pro Forma Loss Per Share, Basic	$ (0.72)	$ (0.21)	$ (0.87)

Acquisitions Mozy Identifiable

Acquisitions Mozy Identifiable Assets Acquired and Liabilities Assumed (Details) - Mozy [Member] $ in Thousands	Mar. 19, 2018USD ($)
Business Acquisition [Line Items]
Cash, net of cash acquired	$ 144,597
Accounts receivable	1,629
Prepaid and other current assets	872
Property and equipment	7,169
Other long-term assets	242
Intangible assets	96,400
Goodwill	74,753
Total Assets Acquired	181,065
Accounts payable	(141)
Accrued liabilities	(417)
Deferred revenue	(19,740)
Deferred tax liability	(16,170)
Net Assets Acquired	144,597
Total Consideration Transferred	$ 144,597

Acquisitions Mozy Finite-Lived

Acquisitions Mozy Finite-Lived Intangibles Acquired (Details) - USD ($) $ in Thousands	Mar. 19, 2018	Jun. 30, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		5 years 3 months 18 days
Developed Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		6 years 1 month 6 days
Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years 9 months 18 days
Mozy [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 96,400
Mozy [Member] | Developed Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 8,700
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years
Mozy [Member] | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 87,200
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years
Mozy [Member] | Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 500
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years
Risk-Adjusted Discount Rates used in Valuation | Mozy [Member] | Developed Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Risk-Adjusted Discount Rates used in Valuation	12.50%
Risk-Adjusted Discount Rates used in Valuation | Mozy [Member] | Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Risk-Adjusted Discount Rates used in Valuation	12.50%
Risk-Adjusted Discount Rates used in Valuation | Minimum [Member] | Mozy [Member] | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Risk-Adjusted Discount Rates used in Valuation	16.50%
Risk-Adjusted Discount Rates used in Valuation | Maximum [Member] | Mozy [Member] | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Risk-Adjusted Discount Rates used in Valuation	17.50%

Acquisitions Mozy Pro Forma Inf

Acquisitions Mozy Pro Forma Information (Details) - Mozy [Member] $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2018USD ($)$ / shares
Business Acquisition, Pro Forma Information [Line Items]
Pro Forma Revenue | $	$ 156,768
Pro Forma Net Income | $	$ 9,395
Pro Forma Earnings Per Share, Basic | $ / shares	$ 0.33
Pro Forma Earnings Per Share, Diluted | $ / shares	$ 0.30

Acquisitions Additional Informa

Acquisitions Additional Information (Details) - USD ($) $ in Thousands	Mar. 26, 2019	Mar. 19, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs			$ 400	$ 2,200	$ 9,900	$ 5,500
Webroot [Member]
Business Acquisition [Line Items]
Cash, net of cash acquired	$ 622,009
Total Consideration Transferred	621,703
Goodwill	$ 388,509
Goodwill, Purchase Accounting Adjustments			2,100
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles			6,100
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			46,600		49,300
Business Combination, Pro Forma Information, Expenses of Acquiree since Acquisition Date, Actual			$ 43,500		$ 46,600
Mozy [Member]
Business Acquisition [Line Items]
Cash, net of cash acquired		$ 144,597
Total Consideration Transferred		144,597
Goodwill		$ 74,753

Goodwill and Acquired Intangi_3

Goodwill and Acquired Intangible Assets - Goodwill Rollforward (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Goodwill [Roll Forward]
Balance as of December 31, 2018	$ 155,086
Goodwill acquired	388,509
Effect of foreign exchange rates	(71)
Balance as of June 30, 2019	$ 543,524

Goodwill and Acquired Intangi_4

Goodwill and Acquired Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years 3 months 18 days
Gross Carrying Value	$ 486,047	$ 159,767
Accumulated Amortization	68,220	41,804
Net Carrying Value	$ 417,827	117,963
Technology-related
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 1 month 6 days
Gross Carrying Value	$ 187,023	59,018
Accumulated Amortization	38,906	26,551
Net Carrying Value	$ 148,117	32,467
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years 3 months 18 days
Gross Carrying Value	$ 273,116	96,997
Accumulated Amortization	24,857	13,398
Net Carrying Value	$ 248,259	83,599
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years 9 months 18 days
Gross Carrying Value	$ 22,156	3,752
Accumulated Amortization	3,962	1,855
Net Carrying Value	$ 18,194	1,897
Internal-use Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years
Gross Carrying Value	$ 3,752	0
Accumulated Amortization	495	0
Net Carrying Value	$ 3,257	$ 0

Goodwill and Acquired Intangi_5

Goodwill and Acquired Intangible Assets - Future Estimated Amortization Expense of Acquired Intangibles (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Remainder of 2019	$ 38,278
2019	70,269
2020	65,728
2021	57,012
2022	48,883
Thereafter	137,657
Net Carrying Value	$ 417,827	$ 117,963

Goodwill and Acquired Intangi_6

Goodwill and Acquired Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 18.8	$ 8	$ 26.4	$ 11.3

Accrued Expenses and Other Cu_3

Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Accrued tax liabilities	$ 4,520	$ 4,588
Accrued consulting and professional fees	4,329	3,103
Accrued sales and marketing	2,186	1,606
Accrued hosting	2,143	764
Accrued interest	1,070	980
Accrued facilities	1,018	1,807
Accrued other expenses	6,429	2,801
Total accrued expenses	21,695	15,649
Current portion of long-term lease liabilities	7,512	0
Derivative liability	740	195
Total other current liabilities	8,252	195
Total accrued expenses and other current liabilities	$ 29,947	$ 15,844

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($) $ in Millions	Jun. 30, 2019	Nov. 19, 2018
Equity [Abstract]
Stock Repurchase Program, Authorized Amount		$ 50
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 28.5

Stock-based Awards Employee Sto

Stock-based Awards Employee Stock Purchase Plan (Details)	6 Months Ended
	Jun. 30, 2019shares
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Discount on Purchase, Employee Stock Ownership Plan	85.00%
Employee Stock Ownership Plan (ESOP), Shares in ESOP	346,984

Stock-based Awards - Stock-Base

Stock-based Awards - Stock-Based Compensation Reflected in Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 5,512	$ 4,741	$ 9,717	$ 8,478
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	478	413	902	738
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	1,611	1,047	2,557	1,734
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	2,290	2,494	4,248	4,618
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 1,133	$ 787	$ 2,010	$ 1,388

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Effective income tax rate	29.90%	(69.80%)	56.50%	172.60%
Tax benefit for release valuation allowance			$ 6.8	$ 16.2
Valuation Allowances and Reserves, Amount	$ 2.1		$ 2.1

Lease Cost (Details)

Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Schedule Of Operating Leases [Line Items]
Operating Lease, Cost	$ 3,235	$ 4,965
Variable Lease, Cost	1,414	2,267
Short-term Lease, Cost	601	946
Lease, Cost	5,250	8,178
Office Building
Schedule Of Operating Leases [Line Items]
Operating Lease, Cost	2,321	3,135
Variable Lease, Cost	830	1,080
Short-term Lease, Cost	228	481
Lease, Cost	3,379	4,696
Data Center Leases
Schedule Of Operating Leases [Line Items]
Operating Lease, Cost	914	1,830
Variable Lease, Cost	584	1,187
Short-term Lease, Cost	373	465
Lease, Cost	$ 1,871	$ 3,482

Leases Cash Paid and Right-of-U

Leases Cash Paid and Right-of-Use Assets Obtained (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2019USD ($)
Cash Paid and Right-of-use Assets Obtained [Line Items]
Operating Lease, Payments	$ 5,219
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	51,822
Office Building
Cash Paid and Right-of-use Assets Obtained [Line Items]
Operating Lease, Payments	3,423
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	43,062
Data Center Leases
Cash Paid and Right-of-use Assets Obtained [Line Items]
Operating Lease, Payments	1,796
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 8,760

Leases Weighted Average Remaini

Leases Weighted Average Remaining Lease Term and Discount Rate (Details)	Jun. 30, 2019
Data Center Leases
Operating Lease, Weighted Average Remaining Lease Term and Discount Rate [Line Items]
Weighted average remaining lease term (in years)	2 years 7 months 6 days
Weighted-average discount rate	5.95%
Office Building
Operating Lease, Weighted Average Remaining Lease Term and Discount Rate [Line Items]
Weighted average remaining lease term (in years)	7 years 3 months 18 days
Weighted-average discount rate	6.60%

Leases Maturity Analysis (Detai

Leases Maturity Analysis (Details) $ in Thousands	Jun. 30, 2019USD ($)
Lease Maturity Analysis [Line Items]
Remainder of 2019	$ 4,266
2020	10,302
2021	11,928
2022	9,489
2023	7,743
Thereafter	26,438
Total	70,166
Less: present value adjustment	15,904
Lease liabilities	54,262
Data Center Leases
Lease Maturity Analysis [Line Items]
Remainder of 2019	1,788
2020	3,532
2021	2,139
2022	833
2023	70
Thereafter	0
Total	8,362
Less: present value adjustment	604
Lease liabilities	7,758
Office Building
Lease Maturity Analysis [Line Items]
Remainder of 2019	2,478
2020	6,770
2021	9,789
2022	8,656
2023	7,673
Thereafter	26,438
Total	61,804
Less: present value adjustment	15,300
Lease liabilities	$ 46,504

Leases ASC 840 (Details)

Leases ASC 840 (Details) $ in Thousands	Dec. 31, 2018USD ($)
Operating Leased Assets [Line Items]
2019	$ 9,027
2020	8,409
2021	6,021
2022	4,546
2023	3,725
Thereafter	5,183
Total	36,911
Data Center Leases
Operating Leased Assets [Line Items]
2019	4,833
2020	4,434
2021	2,133
2022	833
2023	70
Thereafter	0
Total	12,303
Office Building
Operating Leased Assets [Line Items]
2019	4,194
2020	3,975
2021	3,888
2022	3,713
2023	3,655
Thereafter	5,183
Total	$ 24,608

Leases Additional Details (Deta

Leases Additional Details (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 26, 2019	Jan. 01, 2019	Dec. 31, 2018
Lease Balances Additional [Line Items]
Right-of-use lease assets		$ 48,299				$ 0
Lease liabilities		54,262
Operating Lease, Liability, Current		$ 7,512				0
Operating Leases, Rent Expense	$ 2,200		$ 4,400
Accrued Rent						$ 4,500
Data Center Leases
Lease Balances Additional [Line Items]
Lease Expiration Date		Jan. 31, 2023
Lease liabilities		$ 7,758
Office Building
Lease Balances Additional [Line Items]
Lease Expiration Date		Dec. 31, 2029
Letters of Credit Outstanding, Amount		$ 800
Restricted Cash		2,000
Lease liabilities		$ 46,504
Accounting Standards Update 2016-02 [Member] | Lease - Right of Use Asset [Member]
Lease Balances Additional [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification					$ 22,600
Accounting Standards Update 2016-02 [Member] | Lease - Lease Liability [Member]
Lease Balances Additional [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification					$ 28,800
Accounting Standards Update 2016-02 [Member] | Webroot [Member] | Lease - Right of Use Asset [Member]
Lease Balances Additional [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				$ 27,900
Accounting Standards Update 2016-02 [Member] | Webroot [Member] | Lease - Lease Liability [Member]
Lease Balances Additional [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				$ 28,300

Commitments and Contingencies -

Commitments and Contingencies - Other Non-Cancellable Commitments (Details) $ in Thousands	Jun. 30, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remainder of 2019	$ 16,944
2020	9,975
2021	4,405
2022	1,667
Total non-cancellable commitments to vendors	$ 32,991

Restructuring Additional (Detai

Restructuring Additional (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Charges	$ 702	$ 41	$ 702	$ 903
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Accrued restructuring as of December 31, 2018			0
Charges			702
Cash payments			(702)
Accrued restructuring as of June 30, 2019	$ 0		$ 0
2017 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date					$ 1,800
Charges				$ 900

Borrowings and Credit Arrange_3

Borrowings and Credit Arrangements Credit Agreement Additional Details (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Mar. 26, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 130,000
Letter of Credit, Limit			15,000
Swing Loan, Limit			$ 15,000
Write off of Deferred Debt Issuance Cost	$ 800
Term Loan Issued as a Percent of Principal			99.00%
Maturity Date, Days Prior to Maturity of Convertible Debt	91
Springing Maturity Condition Liquidity	$ 20,000
Repayments of Debt	55,000	$ 10,000
Term Loan
Debt Instrument [Line Items]
Repayments of Debt	$ 55,000
Debt Instrument, Interest Rate, Stated Percentage	6.152%
Debt Instrument, Principal	$ 495,000		$ 550,000	$ 0
Debt Issuance Costs, Net	(3,794)
Debt Instrument, Unamortized Discount	(14,671)
Long-term Debt	$ 476,535

Convertible Debt Additional Det

Convertible Debt Additional Details (Details)	Apr. 04, 2017USD ($)$ / shares	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Debt Instrument, Convertible, Conversion Ratio	38.7034
Principal Amount Per Conversion	$ 1,000
Debt Instrument, Convertible, Conversion Price $/share | $ / shares	$ 25.84
Debt Instrument, Convertible, Threshold Non-Consecutive Trading Days	20
Consecutive Trading Day Conversion Window	30
Common Stock Conversion Threshold Percentage	130.00%
Debt Instrument, Convertible, Threshold Percentage of Trading Price Trigger	98.00%
Redemption Price Percentage	100.00%
Proceeds from Issuance of Debt, Convertible Notes	$ 138,700,000
Repayment of Debt	39,200,000
Stock Repurchased During Period, Value	$ 15,000,000
Debt Instrument, Interest Rate, Effective Percentage		8.70%		8.70%
Interest Expense		$ 11,844,000	$ 3,420,000	$ 15,855,000	$ 6,021,000
Coupon Interest
Debt Instrument [Line Items]
Interest Expense				1,797,000	1,797,000
Discount Accretion
Debt Instrument [Line Items]
Interest Expense				3,383,000	3,101,000
Debt Issuance Costs
Debt Instrument [Line Items]
Interest Expense				78,000	72,000
Convertible Debt
Debt Instrument [Line Items]
Interest Expense				5,258,000	$ 4,970,000
Convertible Debt
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.50%
Debt Instrument, Principal	$ 143,800,000	143,750,000		143,750,000		$ 143,750,000
Debt Issuance Costs, Net		(496,000)		(496,000)		(573,000)
Debt Instrument, Unamortized Discount		(21,488,000)		(21,488,000)		(24,872,000)
Convertible Debt		121,766,000		121,766,000		118,305,000
Debt Instrument, Convertible, Carrying Amount of Equity Component		31,451,000		$ 31,451,000		$ 31,451,000
Convertible Debt | Coupon Interest
Debt Instrument [Line Items]
Interest Expense		898,000	898,000
Convertible Debt | Discount Accretion
Debt Instrument [Line Items]
Interest Expense		1,700,000	1,558,000
Convertible Debt | Debt Issuance Costs
Debt Instrument [Line Items]
Interest Expense		39,000	36,000
Convertible Debt | Convertible Debt
Debt Instrument [Line Items]
Interest Expense		$ 2,637,000	$ 2,492,000