Web.com (WEB) 10-K 23 Feb 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Feb. 20, 2018	Jun. 30, 2017
Document Documentand Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	WEB
Entity Registrant Name	WEB.COM GROUP, INC.
Entity Central Index Key	1,095,291
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Common Stock, Shares Outstanding		48,956,360
Entity Public Float			$ 1,010,242,713

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 11,976	$ 20,447
Accounts receivable, net of allowance of $1,454 and $1,695, respectively	25,424	20,567
Prepaid expenses	10,220	12,311
Deferred expenses	63,267	60,217
Other current assets	3,054	1,872
Total current assets	113,941	115,414
Property and equipment, net	57,188	53,132
Deferred expenses	46,316	49,127
Goodwill	885,662	871,751
Intangible assets, net	371,571	413,127
Other assets	21,565	11,282
Total assets	1,496,243	1,513,833
Current liabilities:
Accounts payable	23,357	19,619
Accrued expenses	15,957	14,475
Accrued compensation and benefits	15,560	18,307
Deferred revenue	233,574	230,206
Current portion of debt	16,612	16,847
Deferred consideration from acquisitions	22,466	20,244
Other liabilities	6,321	5,034
Total current liabilities	333,847	324,732
Deferred revenue	185,886	195,859
Long-term debt	630,358	647,294
Deferred tax liabilities	51,042	80,135
Other long-term liabilities	20,474	30,361
Total liabilities	1,221,607	1,278,381
Stockholders' equity:
Common stock, $0.001 par value per share: 150,000,000 shares authorized, 48,845,352 and 50,278,137 shares issued and outstanding at December 31, 2017 and 2016, respectively	49	50
Additional paid-in capital	585,179	578,486
Treasury stock at cost, 4,305,221 and 3,146,012 shares at December 31, 2017 and 2016, respectively	(111,093)	(62,430)
Accumulated other comprehensive loss	(4,503)	(4,020)
Accumulated deficit	(194,996)	(276,634)
Total stockholders' equity	274,636	235,452
Total liabilities and stockholders' equity	$ 1,496,243	$ 1,513,833

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 1,454	$ 1,695
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	48,845,352	50,278,137
Common stock, shares outstanding (in shares)	48,845,352	50,278,137
Treasury Stock (in shares)	4,305,221	3,146,012

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Revenue	$ 749,261	$ 710,505	$ 543,461
Costs and operating expenses
Cost of revenue (excluding depreciation and amortization)	236,530	224,032	184,751
Sales and marketing	201,543	210,294	139,971
Technology and development	69,984	65,800	35,529
General and administrative	79,494	74,919	64,592
Restructuring charges	1,260	3,617	559
Asset impairments	291	9,091	0
Depreciation and amortization	71,544	78,048	56,345
Total cost of revenue and operating expenses	660,646	665,801	481,747
Income from operations	88,615	44,704	61,714
Interest expense, net	(33,061)	(30,462)	(20,013)
Net income before income taxes	55,554	14,242	41,701
Income tax (expense) benefit	(1,925)	(10,252)	48,260
Net income	53,629	3,990	89,961
Other comprehensive income:
Foreign currency translation adjustments	(484)	(1,900)	(724)
Unrealized gain (loss) on investments, net of tax	1	28	(31)
Total comprehensive income	$ 53,146	$ 2,118	$ 89,206
Basic earnings per share:
Net income per common share, basic (in dollars per share)	$ 1.10	$ 0.08	$ 1.79
Diluted earnings per share:
Net income per common share, diluted (in dollars per share)	$ 1.06	$ 0.08	$ 1.72
Basic weighted average common shares (in shares)	48,629	49,262	50,243
Diluted weighted average common shares (in shares)	50,654	50,880	52,442

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2014		52,108,719	395,395
Beginning balance at Dec. 31, 2014	$ 174,090	$ 52	$ (6,975)	$ 552,991	$ (1,393)	$ (370,585)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	89,961					89,961
Unrealized gain (loss) on investments, net of tax	(31)				(31)
Foreign currency translation adjustments	(724)				(724)
Exercise of stock options (in shares)		743,757	743,757
Exercise of stock options	8,635	$ (1)	$ 12,842	(4,206)
Common stock repurchased (in shares)		(150,303)
Common stock repurchased	(3,097)			(3,097)
Stock compensation expense	20,064			20,064
Issuance of restricted stock net of cancellations (in shares)		450,850
Stock issuance costs	(104)			(104)
Common stock purchases under stock repurchase plan (in shares)		2,469,306	2,469,306
Purchases under stock repurchase plan	(50,617)		$ (50,617)
Ending balance at Dec. 31, 2015	238,177	$ 51	$ (44,750)	565,648	(2,148)	(280,624)
Ending balance (in shares) at Dec. 31, 2015		50,683,717	2,120,944
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,990					3,990
Unrealized gain (loss) on investments, net of tax	28				28
Foreign currency translation adjustments	(1,900)				(1,900)
Exercise of stock options (in shares)		607,153	589,015
Exercise of stock options	7,437	$ (1)	$ 10,885	(3,447)
Common stock repurchased (in shares)		(219,279)
Common stock repurchased	(6,728)			(6,728)
Stock compensation expense	20,714			20,714
Issuance of restricted stock net of cancellations (in shares)		878,181	57,552
Stock issuance costs	(41)			(41)
Issuance of common stock options for acquisition	2,340			2,340
Common stock purchases under stock repurchase plan (in shares)		1,671,635	1,671,635
Purchases under stock repurchase plan	(28,565)		$ (28,565)
Ending balance at Dec. 31, 2016	235,452	$ 50	$ (62,430)	578,486	(4,020)	(276,634)
Ending balance (in shares) at Dec. 31, 2016		50,278,137	3,146,012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	53,629					53,629
Unrealized gain (loss) on investments, net of tax	1				1
Foreign currency translation adjustments	$ (484)				(484)
Exercise of stock options (in shares)	1,173,494	1,180,905	1,180,905
Exercise of stock options	$ 17,076	$ (1)	$ 23,661	(6,584)
Common stock repurchased (in shares)		(278,272)	(96,360)
Common stock repurchased	(5,948)			(5,948)
Stock compensation expense	23,201			23,201
Issuance of restricted stock net of cancellations (in shares)		771,910	863,574
Issuance of restricted stock net of cancellations			$ 3,954	(3,954)
Stock issuance costs	(22)			(22)
Common stock purchases under stock repurchase plan (in shares)		3,107,328	3,107,328
Purchases under stock repurchase plan	(76,278)		$ (76,278)
Ending balance at Dec. 31, 2017	274,636	$ 49	$ (111,093)	$ 585,179	$ (4,503)	(194,996)
Ending balance (in shares) at Dec. 31, 2017		48,845,352	4,305,221
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Impact of ASU 2016-09 Adoption	$ 28,009					$ 28,009

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net income	$ 53,629	$ 3,990	$ 89,961
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	71,544	78,048	56,345
Stock compensation expense	23,201	20,714	20,064
Deferred income taxes	(2,287)	7,714	(50,242)
Amortization of debt issuance costs and other	15,321	14,015	11,392
Asset impairments	291	9,091	0
Changes in operating assets and liabilities:
Accounts receivable, net	(4,390)	(3,056)	4,000
Prepaid expenses and other assets	(1,574)	(2,515)	1,937
Deferred expenses	228	170	4,206
Accounts payable	2,690	(1,388)	(489)
Accrued expenses and other liabilities	2,574	(1,473)	(792)
Accrued compensation and benefits	(3,415)	(406)	8,065
Deferred revenue	(7,992)	7,961	7,986
Net cash provided by operating activities	149,820	132,865	152,433
Cash flows from investing activities
Business acquisitions, net of cash acquired	(17,275)	(303,262)	(1,330)
Capital expenditures	(21,474)	(22,140)	(14,747)
Other	0	(1,551)	0
Net cash used in investing activities	(38,749)	(326,953)	(16,077)
Cash flows from financing activities
Stock issuance costs	(22)	(27)	(104)
Common stock repurchased	(4,573)	(4,261)	(2,412)
Payments of long-term debt	(42,954)	(9,813)	(6,250)
Payments of revolving credit facility	(88,313)	(70,687)	(89,000)
Proceeds from exercise of stock options	15,701	4,970	7,952
Deferred consideration payment	(20,433)	0	0
Proceeds from long-term debt issued	50,000	200,000	0
Proceeds from borrowings on revolving credit facility	49,000	115,000	0
Debt issuance costs	(1,935)	(5,700)	0
Common stock purchases under repurchase plan	(76,278)	(28,565)	(50,617)
Other	(129)	0	0
Net cash (used in) provided by financing activities	(119,936)	200,917	(140,431)
Effect of exchange rate changes on cash	(22)	(63)	(2)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(8,887)	6,766	(4,077)
Cash, cash equivalents and restricted cash, beginning of period	25,773	19,007	23,084
Cash, cash equivalents and restricted cash, end of year	16,886	25,773	19,007
Supplemental cash flow information
Interest paid	17,562	15,764	8,761
Income taxes paid	4,406	3,590	2,076
Supplemental disclosure of non-cash transactions
Common stock options issued for acquisitions	0	2,340	0
Capital expenditures, tenant improvements funded by lessor	1,984	0	0
Deferred consideration from acquisitions	$ 2,333	$ 40,017	$ 0

The Company and Summary of Sign

The Company and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company and Summary of Significant Accounting Policies	The Company and Summary of Significant Accounting Policies Description of Company Web.com Group, Inc. ("Web.com" or "the Company") provides a full range of Internet services to small businesses to help them compete and succeed online. Web.com meets the needs of small businesses anywhere along their lifecycle with affordable, subscription-based solutions including domains, hosting, website design and management, search engine optimization, online marketing campaigns, local sales leads, social media, mobile products and eCommerce solutions. The Company has reviewed the criteria of Accounting Standards Codification (“ASC”) 280-10, Segment Reporting, and has determined that the Company is comprised of only one segment, web services and products. Use of Estimates The preparation of the consolidated financial statements in conformity with generally accepted accounting principles ("GAAP") in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Foreign Currency Translation The functional currency of the Company’s United Kingdom-based operations acquired in July 2014 is the British Pound and the functional currency of the Company's Argentine-based sales operations acquired in January 2017 is the Argentine Peso. The Company translates the financial statements of these subsidiaries to U.S. dollars using month-end rates of exchange for assets and liabilities, historical rates of exchange for equity and average rates of exchange for revenues, costs, and expenses. Translation gains and losses are recorded in accumulated other comprehensive income as a component of stockholders’ equity. In addition, the Company’s foreign operations include a customer service center, technology center and an outbound sales center in Canada and a technology center in Argentina. The Company records foreign currency transaction gains and losses, and remeasurement of local currencies of these foreign subsidiaries where the functional currency is different from the local foreign currency in the consolidated statements of income. During the years ended December 31, 2017 , 2016 and 2015 , the Company recorded expense of approximately $0.1 million , $0.3 million and $0.4 million , respectively. Principles of Consolidation The Company’s consolidated financial statements include the assets, liabilities and the operating results of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated. Revenue Recognition and Deferred Revenue The Company recognizes revenue in accordance with ASC 605, Revenue Recognition . The Company recognizes revenue when all of the following conditions are satisfied: (1) there is persuasive evidence of an arrangement; (2) the service has been provided to the customer; (3) the amount of fees to be paid by the customer is fixed or determinable; and (4) the collection of our fees is reasonably assured. Thus, the Company recognizes subscription revenue on a daily basis, as services are provided. Customers are billed for the subscription on a monthly, quarterly, semi-annual, annual or on a multi-year basis, at the customer’s option. For all of the Company’s customers, regardless of the method the Company uses to bill them, subscription revenue is recorded as deferred revenue in the accompanying consolidated balance sheets. As services are performed, the Company recognizes subscription revenue on a daily basis over the applicable service period. When the Company provides a free trial period, the Company does not begin to recognize subscription revenue until the trial period has ended and the customer has been billed for the services. The Company offers certain integrated online marketing services where the fee charged to the customer includes a media budget (”Pay-Per-Click” or “PPC”). Revenue for PPC services are recognized ratably over the period of service. The Company accounts for our multi-element arrangements in accordance with ASC 605-25, Revenue Recognition: Multiple-Element Arrangement. The Company may sell multiple products or services to customers at the same time. For example, we may design a customer website and separately offer other services such as hosting and marketing or a customer may combine a domain registration with other services such as private registration or e-mail. In accordance with ASC 605-25, each element is accounted for as a separate unit of accounting provided the following criteria is met: the delivered products or services have value to the customer on a standalone basis; and for an arrangement that includes a general right of return relative to the delivered products or services, delivery or performance of the undelivered product or service is considered probable and is substantially controlled by the Company. The Company considers a deliverable to have standalone value if the product or service is sold separately by us or another vendor or could be resold by the customer. Our products and services do not include a general right of return relative to the delivered products. In cases where the delivered products or services do not meet the separate unit of accounting criteria, the deliverables are combined and treated as one single unit of accounting for revenue recognition. The Company assigns value to the separate units of accounting in multiple-element arrangements using the relative selling price method which is calculated by taking the standalone selling price of each unit to the total selling price of the arrangement, multiplied by the total sales price. Typically, the deliverables within multiple-element arrangements are provided over the same service period, and therefore revenue is recognized over the same period. To determine the selling price in multiple-element arrangements, the Company establishes vendor-specific objective evidence of the selling price using the price of the deliverable when sold separately. If we are unable to determine the selling price because vendor-specific objective evidence does not exist, the Company will first look to third party evidence, and if that is not sufficient, it will determine an estimated sales price through consultation with and approval by the Company’s management, taking into consideration the Company’s relative costs, target profit margins, and any other information gathered during this process. Generally, compensation related sales costs are expensed as incurred. Cost of Revenue and Operating Expenses Cost of Revenue Cost of revenue consists of expenses related to compensation of our web page development staff, domain name registration costs, directory listing fees, eCommerce store design, online marketing costs for services provided, billing costs, hosting expenses, and allocated occupancy overhead costs. The Company allocates occupancy overhead costs such as rent and utilities to all departments based on headcount. Accordingly, general overhead expenses are reflected in each cost of revenue and operating expense category. Sales and Marketing Expense The Company's direct marketing expenses include the costs associated with the online marketing channels used to promote our services and acquire customers. These channels include search marketing, affiliate marketing and partnerships. Sales and marketing costs consist primarily of compensation and related expenses for our sales and marketing staff as well as our customer support staff and allocated occupancy overhead costs. Sales and marketing expenses also include marketing programs, such as advertising, corporate sponsorships and other corporate events and communications. Technology and development Technology and development represents costs associated with creation, development and distribution of our products and websites. Technology and development expenses primarily consist of headcount-related costs associated with the design, development, deployment, testing, operation, enhancement of our products and costs associated with the data centers and all systems infrastructure costs supporting those products as well as all administrative platforms and allocated occupancy overhead costs. General and Administrative Expense General and administrative expenses consist of compensation and related expenses for executive, finance, and administration, as well as professional fees, corporate development costs, other corporate expenses, and allocated occupancy overhead costs. Depreciation and Amortization Expense Depreciation and amortization expenses relate primarily to our intangible assets recorded due to the acquisitions we have completed, as well as depreciation expense from computer and other equipment, internally developed software, furniture and fixtures, and building and improvement expenditures. Cash and Cash Equivalents Cash and cash equivalents include cash on hand and bank demand deposit accounts. For purposes of presentation in the Consolidated Balance Sheets, the Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents. Short term restricted cash of $0.3 million and $0.5 million as of December 31, 2017 and 2016 , respectively is included in other current assets. Long term restricted cash of $4.6 million and $4.9 million as of December 31, 2017 and 2016 , respectively is included in other long-term assets. The restricted cash is primarily to collateralize letters of credit in support of leases. Concentrations of Credit Risk Financial instruments that potentially subject the Company to concentration of credit risk consist principally of cash and cash equivalents and trade receivables. The Company invests its cash in cash and credit instruments of highly rated financial institutions; four institutions hold 97% of the Company's total cash and cash equivalents. Concentrations of credit risk with respect to trade accounts receivable are limited due to the large number of customers comprising the Company’s customer base and their geographic dispersion. The Company has not incurred any significant credit related losses. Accounts Receivable Accounts receivable are recorded on the balance sheet at net realizable value. The Company uses historical collection percentages and customer-specific information, when available, to estimate the amount of trade receivables that are uncollectible and establishes reserves for uncollectible balances based on this information. Generally, receivables are classified as past due after 60 days . Trade receivables are written off once collection efforts are exhausted. The Company does not generally require deposits or other collateral from customers. Bad debt expense reported in operating expenses excludes provisions made to the allowance for doubtful accounts for anticipated refunds and automated clearinghouse returns that are recorded as adjustments to revenue. Deferred Expenses Deferred expenses primarily consist of prepaid domain name registry fees that are paid in full at the time a domain name is registered. The registry fees are recognized on a straight-line basis over the term of the domain registration period. Goodwill and Other Intangible Assets The Company continued to perform the quantitative tests to determine if the carrying value of our goodwill and indefinite-lived intangible assets are impaired for our annual test at December 31, 2017 . The Company tests goodwill and intangible assets for impairment using one reporting unit. A market approach is used to test goodwill for impairment, while our intangible asset test uses the income approach. The following is not a complete discussion of the Company’s calculations, but outlines the general assumptions and steps for testing goodwill and intangible assets for impairment: Goodwill The first step involves comparing the fair value of our reporting unit to its carrying value, including goodwill. The Company uses a market capitalization approach after considering an estimated control premium. If the carrying value exceeds its fair value, the second step of the test is performed by comparing the carrying value of goodwill to its implied fair value. An impairment charge is recognized for the excess of the carrying value over its implied fair value. Intangible Assets The Company estimates the fair value of indefinite-lived intangibles using the relief-from-royalty method, a form of the income approach. It is based on the principle that ownership of the intangible asset relieves the owner of the need to pay a royalty to another party in exchange for rights to use the asset. Key assumptions in estimating the fair value include, among other items, forecasted revenue, royalty rates, tax rates, and the benefit of tax amortization. The Company employs a weighted-average cost of capital approach to determine the discount rate used in our projections. The determination of the discount rate includes certain factors such as, but not limited to, the risk-free rate of return, market risk, size premium, and the overall level of inherent risk. If the carrying value of the intangibles exceeds its fair value, an impairment charge is recognized. The results of these analyses indicated that the Company’s goodwill and indefinite-lived intangible assets were not impaired at December 31, 2017 . Technology and Development Costs The Company expenses technology and development costs as incurred. Property and Equipment Property and equipment, including software, are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are provided over the estimated useful lives of the assets using the straight-line method. The asset lives used are presented in the table below: Estimated Useful Life in Years Computer equipment 3 - 5 Software 2 - 3 Furniture and fixtures 5 Other equipment 5 - 6 Buildings 30 Building improvements 15 Leasehold improvements Shorter of asset’s life Advertising Advertising costs are expensed as incurred. Included in advertising are general marketing, corporate sponsorships as well as online marketing and banner advertisements. Total advertising expense was $30.6 million , $46.4 million and $50.1 million for the years ending December 31, 2017 , 2016 and 2015 , respectively. Income Taxes The Company accounts for income taxes using the liability method under the provisions of ASC 740, Income Taxes . ASC 740 requires recognition of deferred tax liabilities and assets for the expected future tax consequences of events that have been included in the financial statements or tax returns. Under this method, deferred tax liabilities and assets are determined based on the difference between the financial statement and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the difference is expected to reverse. Further, deferred tax assets are recognized for the expected realization of available deductible temporary differences and net operating loss and tax credit carry forwards. ASC 740 requires companies to assess whether a valuation allowance should be established against deferred tax assets based on consideration of all available evidence using a “more likely than not” threshold. In making such assessments, the Company considers the expected reversals of our existing deferred tax liabilities within the applicable jurisdictions and carry forward periods, based on our existing Section 382 limitations. The Company does not consider deferred tax liabilities related to indefinite lived intangibles or tax deductible goodwill as a source of future taxable income. Additionally, the determination of the amount of deferred tax assets which are more likely than not to be realized is also dependent on projections of future earnings, which are subject to uncertainty and estimates that may change given economic conditions and other factors. A valuation allowance is recorded to reduce our deferred tax assets to the amount that is “more likely than not” to be realized based on the above methodology. The Company reviews the adequacy of the valuation allowance on an ongoing basis and adjusts our valuation allowance in the appropriate period, if applicable. The Company records liabilities for uncertain tax positions related to federal, state and foreign income taxes in accordance with ASC 740. These liabilities reflect the Company’s best estimate of its ultimate income tax liability based on the tax code, regulations, and pronouncements of the jurisdictions in which we do business. Estimating our ultimate tax liability may involve significant judgments regarding the application of complex tax regulations across many jurisdictions. If the Company’s actual results differ from estimated results, our effective tax rate and tax balances could be affected. As such, these estimates may require adjustment in the future as additional facts become known or as circumstances change. If applicable, the Company will adjust the income tax provision in the appropriate period. Stock-Based Employee Compensation The Company grants to our employees and directors options to purchase common stock at exercise prices equal to the quoted market values of the underlying stock at the time of each grant. The fair value of each option award as of the grant date is determined using the Black-Scholes option pricing valuation model in accordance with ASC 718, Compensation-Stock Compensation . In addition, the Company grants performance-based share equity awards that contain service, performance and market conditions. The performance conditions are assessed at each reporting period and compensation expense is recorded to reflect the probable attainment of each condition. The market conditions are valued using a Monte Carlo simulation model. The valuation is prepared with the assistance of a third-party specialist to estimate the grant date fair value of the award. The fair value of all stock awards is recognized in compensation expense on a straight-line basis over the requisite service period for awards expected to vest.

New Accounting Standards

New Accounting Standards	12 Months Ended
	Dec. 31, 2017
Accounting Changes and Error Corrections [Abstract]
New Accounting Standards	New Accounting Standards Recently Adopted Accounting Standards In March 2016, the FASB issued Accounting Standards Update ("ASU") 2016-09, Compensation-Stock Compensation: Improvements to Employee Share-Based Payment Accounting and is effective for fiscal years beginning after December 15, 2016. The standard is intended to simplify several areas of accounting for share-based compensation arrangements, including the income tax impact, classification on the statement of cash flows, statutory withholding requirements and forfeitures. The Company adopted ASU 2016-09 in the first quarter of 2017 and recorded excess tax benefits (ETBs) as expense or benefit in the income statement prospectively as of the beginning of the year of adoption and the Company continued to record shortfalls as a component of income tax expense consistent with historical practices. For interim reporting purposes, the Company reports ETBs and shortfalls as discrete items in the period in which they occur. For the twelve months ended December 31, 2017, the Company recognized a tax benefit related to the adoption of $1.8 million . In addition, the guidance eliminates the requirement that ETBs be realized before companies can recognize them. The Company applied this part of the guidance using a modified retrospective transition method and recorded a cumulative-effect adjustment for previously unrecognized ETBs in opening retained earnings on January 1, 2017 upon adoption. The cumulative-effect adjustment for federal and state tax purposes was $27.0 million and $2.7 million , respectively. A valuation allowance was recorded on $1.7 million of these deferred tax assets for a portion of the state adjustment to reflect the amount realized on a "more likely than not" basis. Further, the Company presents ETBs and excess tax deficiencies as an operating activity on the statement of cash flows starting on January 1, 2017. The Company has prospectively adopted this change. The Company continues to record its stock compensation expense based on an estimate of the awards that are expected to vest, rather than recording forfeitures when they occur. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments , addressing eight specific cash flow issues in an effort to reduce diversity in practice. The amended guidance is effective for fiscal years beginning after December 31, 2017, and for interim periods within those years. The Company early adopted this standard with no impact. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash , which requires a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The amended guidance is effective for fiscal years beginning after December 31, 2017, and for interim periods within those years. The Company elected to early adopt this standard and has restated the statement of cash flows for the earliest period presented to conform with the retrospective application of the standard. The Company elected to early adopt this standard which increased net cash flows provided by operating activities for the year ending December 31, 2016 by approximately $5.0 million and decreased net cash flows provided by operating activities for the year ending December 31, 2015 by approximately $0.3 million from the previously filed amounts. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business . The new guidance clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The new guidance is effective for the Company beginning after January 1, 2018, including interim periods within those periods. The Company elected to early adopt the standard and did so without material impact. Accounting Standards Issued Not Yet Adopted In May 2014, the FASB and International Accounting Standards Board ("IASB") issued ASU 2014-09 Revenue from Contracts with Customers (Topic 606) , a converged standard on revenue recognition which supersedes previous revenue recognition guidance. Some of the main areas of transition to the new standard include, among others, transfer of control (revenue is recognized when a customer obtains control of a good or service), allocation of transaction price is based on relative standalone selling price (entities that sell multiple goods or services in a single arrangement must allocate the consideration to each of those goods or services), contract costs (entities sometimes incur costs, such as sales commissions or mobilization activities, to obtain or fulfill a contract), and disclosures (extensive disclosures are required to provide greater insight into both revenue that has been recognized, and revenue that is expected to be recognized in the future from existing contracts). In August 2015, the FASB issued ASU 2015-14 Revenue from Contracts with Customers (Topic 606), Deferral of the Effective Date , which defers the effective date of the new standard by one year, resulting in the new standard being effective for fiscal years, and interim periods within those years, beginning after December 15, 2017 with early adoption as of the original effective date permitted. In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations (Reporting Revenue Gross versus Net) and in April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing . Further in May 2016, the FASB issued ASU 2016-12, Revenue from Contracts with Customers: Narrow-Scope Improvements and Practical Expedients . These standards clarify the guidance in ASU 2014-09 and have the same effective date as the original standard. The Company will apply the standard using a modified retrospective approach with the cumulative effect of initially applying the standard recognized at the date of initial application inclusive of certain additional disclosures, as permitted under Topic 606. The Company has completed its initial evaluation of its customer contracts and related costs to acquire and fulfill contracts and designed necessary systematic changes to account for the ongoing impact of the new standard on its consolidated financial statements. Based upon the initial evaluation of customer contracts, the Company does not expect a material impact on revenue as a result of adopting the standard; however, the Company does expect to have an impact on total assets and expense recognition patterns resulting from provisions in the standard requiring the capitalization of and amortization of costs to acquire contracts. The Company is in process of completing the quantification of the impact upon adoption. In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall: Recognition and Measurement of Financial Assets and Financial Liabilities , which addresses certain aspects of the recognition, measurement, presentation and disclosure of financial instruments. The amendment will be effective for the Company beginning January 1, 2018 and the adoption of this standard is not expected to have a material impact on our consolidated financial statements or disclosures. In February 2016, the FASB issued ASU 2016-02, Leases , which requires lessees to recognize on the balance sheet a right-of-use asset, representing their right to use the underlying asset for the lease term, and a lease liability for all leases with terms greater than 12 months. The guidance also requires qualitative and quantitative disclosures designed to assess the amount, timing and uncertainty of cash flows arising from leases. The standard requires the use of a modified retrospective transition approach, which includes a number of optional practical expedients that entities may elect to apply. ASU 2016-02 is effective for the Company beginning January 1, 2019 and we are currently evaluating the impact that ASU 2016-02 will have on our consolidated financial statements. In October 2016, the FASB issued ASU 2016-16, which requires that entities recognize the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. The standard will be effective for the Company on January 1, 2018. The adoption is not expected to have a material impact on the consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment . The new guidance requires only a one-step quantitative impairment test, whereby a goodwill impairment loss will be measured as the excess of a reporting unit’s carrying amount over its fair value (not to exceed the total goodwill allocated to that reporting unit). It eliminates Step 2 of the current two-step goodwill impairment test, under which a goodwill impairment loss is measured by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. For public companies, the amended guidance is effective for the Company beginning after January 1, 2020. The adoption of this standard is not expected to have a material impact on its consolidated financial statements or disclosures. In May 2017, the FASB issued ASU 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting . The new guidance amends the scope of modification accounting for share-based payment arrangements and provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under ASC 718. This standard is effective for the Company beginning January 1, 2018, including interim periods within those periods. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on its consolidated financial statements or disclosures. In July 2017, the FASB issued ASU 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities From Equity (Topic 480) And Derivatives And Hedging (Topic 815): Accounting For Certain Financial Instruments With Down Round Features, Replacement of the Indefinite Deferral For Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests With a Scope Exception . The new guidance changes the classification of certain equity-linked financial instruments (or embedded features) with down round features. The amendments also clarify existing disclosure requirements for equity-classified instruments. For freestanding equity-classified financial instruments, the amendments require entities that present earnings per share (EPS) in accordance with Topic 260, Earnings Per Share, to recognize the effect of the down round feature when it is triggered. That effect is treated as a dividend and as a reduction of income available to common shareholders in basic EPS. Convertible instruments with embedded conversion options that have down round features would be subject to the specialized guidance for contingent beneficial conversion features (in Subtopic 470-20, Debt—Debt with Conversion and Other Options), including related EPS guidance (in Topic 260). The amendments in Part II of this Update recharacterize the indefinite deferral of certain provisions of Topic 480, Distinguishing Liabilities from Equity, that now are presented as pending content in the Codification, to a scope exception. Those amendments do not have an accounting effect. Part I of the new guidance affects any entity that issues financial instruments that include down round features. The amendments in Part I of this Update that relate to the recognition, measurement, and earnings per share of certain freestanding equity-classified financial instruments that include down round features affect entities that present earnings per share in accordance with the guidance in Topic 260, Earnings Per Share. Part I is effective for the Company beginning January 1, 2019 and Part II did not require transition guidance as the amendment did not have an accounting effect. The adoption of this standard is not expected to have a material impact on its consolidated financial statements or disclosures. In January 2018, the FASB released guidance on the accounting for tax on the global intangible low-taxed income ("GILTI") provisions of the Tax Cuts and Jobs Act (the "Act"). The GILTI provisions impose a tax on foreign income in excess of a deemed return on tangible assets of foreign corporations. The Act indicates that either accounting for deferred taxes related to GILTI inclusions or to treat any taxes on GILTI inclusions as period cost are both acceptable methods subject to an accounting policy election. The Company is in process of evaluating the impact of the GILTI provisions. In February 2018, the FASB issued ASU 2018-02, Income Statement — Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income that allows entities to reclassify from accumulated other comprehensive income to retained earnings stranded tax effects resulting from the Act. The Company is in the process of evaluating the impact of adoption.

Net Earnings Per Common Share

Net Earnings Per Common Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Net Earnings Per Common Share	Net Earnings Per Common Share Basic net earnings per common share is calculated using net income and the weighted-average number of shares outstanding during the reporting period. Diluted net earnings per common share includes the effect from the potential issuance of common stock, such as common stock issued pursuant to the exercise of stock options or vesting of restricted shares. During the first quarters of 2017, 2016 and 2015, the Company issued equity awards with performance, service, and market conditions. These awards are included in basic shares outstanding once all criteria have been met and the shares have vested. Prior to the end of the vesting period, the number of contingently issuable shares included in diluted EPS is based on the number of shares, if any, that would be issuable under the terms of the arrangement if the end of the reporting period were the end of the contingency period, using the treasury stock method and assuming the result would be dilutive. As of December 31, 2017 and 2016 , the performance criteria for the first through third tranches of the 2015 grant, the first and second tranche of the 2016 grant and the first tranche of the 2017 grant were satisfied and the equity awards were included in the diluted share calculation. See Note 11, Stock-Based Compensation and Stockholders' Equity , for additional information on these awards. During the years ended December 31, 2017 , 2016 and 2015 , 2.4 million , 3.4 million and 1.6 million share-based awards, respectively, have been excluded from the calculation of diluted common shares because including those securities would have been anti-dilutive. The Company's potentially dilutive shares also include incremental shares issuable upon the conversion of the Senior Convertible Notes due August 15, 2018 ("2018 Notes"). Upon conversion or maturity of the 2018 Notes, the Company may settle the notes with either cash, shares of our common stock or a combination of cash and shares of our common stock, at our election. The Company has adopted a current policy to settle the principal amount in cash and any excess conversion value in shares of our common stock. Because the principal amount of the 2018 Notes will be settled in cash upon conversion, only the conversion spread relating to the 2018 Notes is included in our calculation of diluted earnings per common share. When the market price of our stock exceeds the conversion price, as applicable, we will include, in the diluted net income per common share calculation, the effect of the additional shares that may be issued upon conversion using the treasury stock method. There were no incremental common shares from the 2018 Notes that were included in the calculation of diluted shares because the Company's average common stock price did not exceed the conversion price of approximately $35.00 per common share during the years ended December 31, 2017 , 2016 and 2015 . See Note 4, Long-term Debt , for information on these notes. The following table sets forth the computation of basic and diluted net earnings per common share (in thousands, except per share amounts): 2017 2016 2015 Net income $ 53,629 $ 3,990 $ 89,961 Basic weighted average common shares 48,629 49,262 50,243 Dilutive effect of stock options 1,399 1,265 1,757 Dilutive effect of restricted shares 612 352 426 Dilutive effect of performance shares 14 1 16 Dilutive effect of the assumed conversion of the 2018 Notes — — — Diluted weighted average common shares 50,654 50,880 52,442 Basic earnings per share: Net income per common share $ 1.10 $ 0.08 $ 1.79 Diluted earnings per share: Net income per common share $ 1.06 $ 0.08 1.72

Long-term Debt

Long-term Debt	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Long-term Debt	Long-term Debt 1% Senior Convertible Notes due August 15, 2018 In August 2013, the Company issued $258.8 million aggregate principal amount of 1.00% Senior Convertible Notes due August 15, 2018 ("2018 Notes"). The 2018 Notes bear interest at a rate of 1.00% per year, payable semiannually in arrears, on February 15 and August 15 of each year, beginning on February 15, 2014. The conversion price for the 2018 Notes is equivalent to an initial effective conversion price of approximately $35.00 per share of common stock. Proceeds, net of original issuance discounts of $252.3 million were received from the 2018 Notes. The net proceeds were used to pay down $208.0 million of the First Lien Term Loan and $43.0 million of the Revolving Credit Facility. Beginning August 20, 2016, the Company may redeem for cash any or all of the 2018 Notes, at its option, if the last reported sale price of our common stock exceeds 130% of the applicable conversion price on each applicable trading day as defined by the indenture. The redemption price will equal 100% of the principal amount of the 2018 Notes to be redeemed, plus accrued and unpaid interest to, but not including, the redemption date. Holders of the 2018 Notes may also convert their notes at any time prior to May 15, 2018 if the sale price of our common stock exceeds 130% of the applicable conversion price on each applicable trading day as defined by the indenture. In addition, holders may also convert their 2018 Notes any time prior to May 15, 2018, (i) if during the five business days after any five consecutive trading day period in which the trading price of the 2018 Notes was less than 98% of the product of the last reported sale price of the Company's common stock and the conversion rate, (ii) if the Company calls the 2018 Notes for redemption; or (iii) upon the occurrence of specified corporate events. The 2018 Notes are senior unsecured obligations and will be effectively junior to any of the Company's existing and future secured indebtedness. As of December 31, 2017 , the Company has included $248.1 million of the 2018 Notes as long-term debt based upon our intent and ability to refinance these obligations. The Company determined that the embedded conversion option in the 2018 Notes is not required to be separately accounted for as a derivative under ASC 815, Derivatives and Hedging . The 2018 Notes are within the scope of ASC 470, Topic 20, Debt with Conversion and Other Options, which requires the Company to separate a liability component and an equity component from the proceeds received. The carrying amount of the liability component at the time of the transaction of $204.4 million was calculated by measuring the fair value of a similar debt instrument that does not have an associated equity component. The fair value of the liability component was subtracted from the initial proceeds and the remaining amount of $47.8 million was recorded as the equity component. The excess of the principal amount of the liability component over its carrying amount is being amortized to interest expense over the expected life of 5 years using the effective interest method. Upon conversion or maturity of the 2018 Notes, the Company may settle the notes with either cash, shares of its common stock or a combination of cash and shares of its common stock, at its election. The Company has adopted a policy to settle the $258.8 million of principal amount in cash and any excess conversion value in shares of our common stock. Because the principal amount of the 2018 Notes will be settled in cash upon conversion, only the conversion spread relating to the 2018 Notes may be included in the Company's calculation of diluted net earnings per common share. When the market price of the Company's stock exceeds the conversion price, it will include, in the diluted net earnings per common share calculation, the effect of the additional shares that may be issued upon conversion using the treasury stock method. As such, the 2018 Notes have no impact on diluted net earnings per common share until the price of the Company's common stock exceeds the conversion price (approximately $35.00 per common share) of the 2018 Notes. As of December 31, 2017 and 2016 , the carrying value of the debt and equity component was $251.0 million and $47.8 million and $239.2 million and $47.8 million , respectively. The unamortized debt discount of $7.7 million as of December 31, 2017 will be amortized over the remaining life of 0.6 years using the effective interest method. Amended Credit Agreement On February 11, 2016, the Company entered into an amendment (the "Amendment") to that certain Credit Agreement, dated as of September 9, 2014 (the "Existing Credit Agreement" and as amended by the Amendment, the "Amended Credit Agreement"), by and among the Company, the several lenders from time to time parties thereto, and JPMorgan Chase Bank, N.A., as administrative agent. On March 9, 2016 (the "Closing Date"), the Amended Credit Agreement became effective following the completion of the acquisition of Yodle Inc. (the "Acquisition"). On May 18, 2017, the Company entered into a second amendment to the Credit Agreement ("Second Amendment"). The Amended Credit Agreement provides for (i) $390.0 million of five -year secured term loans, replacing and refinancing $190.0 million of secured term loans outstanding under the Existing Credit Agreement and providing for an additional $200.0 million of secured term loans (the "Term Loan") and (ii) a five -year secured revolving credit facility that provides up to $150 million of revolving loans (the "Revolving Credit Facility"), which replaces the revolving credit facility under the Existing Credit Agreement. On the Closing Date, the Company used the proceeds of the Term Loan and borrowed $115.0 million of loans under the Revolving Credit Facility, together with cash on hand, to complete the Acquisition. The Second Amendment to the Credit Agreement provided an incremental $ 50.0 million of secured Term Loan and an incremental $ 110.0 million of borrowing capacity on the Revolving Credit Facility with maturity dates that were commensurate with the Amended Credit Agreement. The Company used the proceeds from the incremental Term Loan to repay the then outstanding amount drawn on the Revolving Credit Facility at the date of closing. The Term Loan and loans under the Revolving Credit Facility initially bore interest at a rate equal to either, at the Company’s option, the LIBOR rate plus an applicable margin equal to 3.00% per annum, or the prime lending rate plus an applicable margin equal to 2.00% per annum. The applicable margins for the Term Loan and loans under the Revolving Credit Facility are subject to reduction or increase based upon the Company’s consolidated first lien net leverage ratio as of the end of each fiscal quarter. Effective August 2016, the Company's interest rate on these loans was reduced to the LIBOR rate plus the applicable margin of 2.50% per annum as a result of reaching certain financial covenant ratios. The Company must also pay (i) a commitment fee of 0.45% per annum on the actual daily amount by which the revolving credit commitment exceeds then-outstanding usage under the Revolving Credit Facility, also subject to reduction or increase based upon the Company’s consolidated first lien net leverage ratio, (ii) a letter of credit fee equal to the applicable margin that applies to LIBOR loans under the Revolving Credit Facility and (iii) a fronting fee of 0.125% per annum, calculated on the daily amount available to be drawn under each letter of credit issued under the Revolving Credit Facility. The Company is permitted to make voluntary prepayments with respect to the Revolving Credit Facility and the Term Loan at any time without payment of a premium. The Company is required to make mandatory prepayments of the Term Loan with (i) net cash proceeds from certain asset sales (subject to reinvestment rights) and (ii) net cash proceeds from certain issuances of debt. The Company is also required to maintain certain financial ratios under the Credit Agreement and there are customary covenants that limit the incurrence of debt, the payment of dividends, the disposition of assets, and making of certain payments. Substantially all of the Company's and certain of its domestic subsidiaries' tangible and intangible assets are pledged as collateral under the Credit Agreement. Both of the aforementioned amendments were accounted for as a modification of the credit agreement and as a result, $1.9 million and $5.7 million of additional loan origination discounts and bank lender fees were capitalized during the years ended December 31, 2017 and 2016 , respectively. Outstanding long-term debt and the effective interest rates at December 31, 2017 and 2016 consist of the following (in thousands): December 31, December 31, Revolving Credit Facility maturing 2021, 3.93%, based on LIBOR plus 2.50% $ 10,000 $ 47,094 Term Loan due 2021, 3.98%, based on LIBOR plus 2.50%, less unamortized discount of $3,800 at December 31, 2017, effective rate of 4.33% 385,934 377,851 Senior Convertible Notes, maturing 2018, 1.00%, less unamortized discount of $7,714 at December 31, 2017, effective rate of 5.88% 251,036 239,196 Total Outstanding Debt, less unamortized discount of $11,514 at December 31, 2017 646,970 664,141 Less: Current Portion of Long-Term Debt, less unamortized discount of $379 at December 31, 2017 (16,612 ) (16,847 ) Long-Term Portion, less unamortized discount of $11,135 at December 31, 2017 $ 630,358 $ 647,294 * The Compan y has $248.1 million of av ailable borrowings under the Revolving Credit Facility as of December 31, 2017 . Debt discount and issuance costs The Company recorded $14.2 million , $12.8 million and $11.4 million of interest expense from amortizing debt issuance costs and discounts during the years ended December 31, 2017 , 2016 and 2015 , respectively. Total estimated principal payments due for the next five years as of December 31, 2017 are as follows (in thousands): 2018 $ 16,990 2019 41,370 2020 44,128 2021 555,996 Total principal payments $ 658,484 Included in fiscal 2021 payments is $248.1 million related to the 2018 Senior Convertible Notes, as the Company has the intent and ability to refinance these obligations.

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Business Combinations	Business Combinations Acquisition of Acquisio, Inc. On November 1, 2017, the Company acquired certain assets and liabilities of Acquisio, Inc., a provider of online advertising management. The Company paid approximately $8.7 million from acquisition closing through December 31, 2017 and the Company may pay additional consideration of up to approximately $0.6 million , subject to certain indemnification provisions. Transaction costs associated with the acquisition were not significant. The Company has accounted for the acquisition using the acquisition method as required by ASC 805, Business Combinations . As such, preliminary fair values have been assigned to the assets acquired and liabilities assumed and the excess of the total purchase price over the fair value of the net assets acquired is recorded as goodwill. The Company, with the assistance of independent valuation professionals, has also performed preliminary estimates of the fair value of certain intangible assets. The goodwill recorded from this acquisition represents business benefits the Company anticipates realizing from acquiring the entity, and the amount is expected to be deductible for income tax purposes. The following table summarizes the Company's preliminary purchase price allocation based on the fair values of the assets acquired and the liabilities assumed (in thousands): November 1, 2017 Tangible current assets $ 130 Property plant and equipment 376 Domain/Trade names 401 Developed Technology 2,698 Customer relationships 1,908 Goodwill 4,264 Current liabilities (274 ) Deferred revenue (93 ) Other long term liabilities (129 ) Purchase price consideration $ 9,281 The Company is still reviewing information surrounding intangible assets, certain assets and liabilities and income taxes. These items may result in changes to the Company's preliminary purchase price allocation. The preliminary customer relationships and developed technology will be amortized over four years and ten years, respectively. The domain and trade names are indefinite-lived intangible assets and are not amortized. Acquisition of DonWeb On January 31, 2017, the Company acquired 100% of the outstanding shares of DonWeb, a hosting and domain registration company catering to the Spanish-speaking market, located in Rosario, Argentina. The Company paid approximately $8.6 million at closing. The Company may pay the seller additional consideration of up to $2.0 million on January 31, 2021, present valued to $1.7 million as of the acquisition date subject to certain indemnification provisions, for total consideration of $10.3 million . In addition, the agreement includes a four -year earnout provision that entitles the seller up to $3.0 million of consideration contingent upon the post-acquisition business performance and employment. Earnout amounts are recorded as compensation expense. Transaction costs associated with the acquisition were not significant. The Company has accounted for the acquisition using the acquisition method as required by ASC 805, Business Combinations . As such, preliminary fair values have been assigned to the assets acquired and liabilities assumed and the excess of the total purchase price over the fair value of the net assets acquired is recorded as goodwill. The Company, with the assistance of independent valuation professionals, has also performed preliminary estimates of the fair value of certain intangible assets. The goodwill recorded from this acquisition represents business benefits the Company anticipates realizing from acquiring an entity in the Spanish-speaking market, and is not expected to be deductible for income tax purposes. In connection with the acquisition, the Company recorded approximately $4.0 million of liabilities arising from pre-acquisition matters that are more likely than not to be sustained upon examination, inclusive of interest and penalties for which the Company is indemnified. The following table summarizes the Company's preliminary purchase price allocation based on the fair values of the assets acquired and the liabilities assumed (in thousands): As of January 31, 2017 Adjustments to Opening Balance Sheet As of December 31, 2017 Tangible current assets $ 1,145 $ (74 ) $ 1,071 Property plant and equipment 2,392 (48 ) 2,344 Domain/Trade names — 990 990 Non-competes — 236 236 Customer relationships 4,140 (2,420 ) 1,720 Other non current assets 2,849 (38 ) 2,811 Goodwill 9,519 1,049 10,568 Current liabilities (837 ) (901 ) (1,738 ) Deferred revenue (2,860 ) 1,276 (1,584 ) Other long term liabilities (6,000 ) (70 ) (6,070 ) Purchase price consideration $ 10,348 $ — $ 10,348 The Company is still reviewing information surrounding intangible assets, certain assets and liabilities, income taxes and deferred revenue. These items may result in changes to the Company's preliminary purchase price allocation. The preliminary non-competes and customer relationships will be amortized over four years and three years, respectively. The domain and trade names are indefinite-lived intangible assets and are not amortized. Acquisition of Yodle On March 9, 2016, the Company executed an Agreement and Plan of Merger (the "Merger Agreement) with Yodle, Inc., a Delaware corporation ("Yodle"), and Shareholder Representative Services, LLC, a Colorado limited liability company. The Company acquired 100% of the outstanding shares of Yodle, Inc. and paid approximately $300.3 million adjusted for, among other things, Yodle's cash and outstanding debt and transaction related expenses. The Company will pay an additional $18.9 million and $22.0 million on the first and second anniversary dates of the closing, respectively, subject to adjustments as described in the Merger Agreement. Finally, the Company converted out of the money stock options held by employees of Yodle to Web.com options, which resulted in additional consideration of $2.3 million , for total consideration of $341.3 million . In addition to the consideration, the Company incurred approximately $3.9 million of acquisition-related transaction expenses which are reflected in the General and Administrative line item of the Consolidated Statement of Comprehensive Income for the year ended December 31, 2016. The Company has accounted for the acquisition of Yodle using the acquisition method as required by ASC 805, Business Combinations . As such, fair values have been assigned to the assets acquired and liabilities assumed and the excess of the total purchase price over the fair value of the net assets acquired is recorded as goodwill. The Company, with the assistance of independent valuation professionals, has also performed valuation of the fair value of certain intangible assets. The goodwill recorded from this acquisition represents business benefits the Company anticipates realizing from acquiring a leader in value added digital marketing solutions that further solidifies our position as a leading national provider in this space. In addition, Yodle has vertically focused solutions that help small businesses attract new business and retain existing customers through cloud based marketing platforms. Finally, the Company also expects to benefit from synergies by eliminating duplicate operational and administrative expenditures, where feasible. The goodwill from the acquisition is not deductible for tax purposes. The adjustments made to the purchase price allocation through December 31, 2016 were primarily due to refinement of inputs used to calculate the fair value of the customer relationship, developed technology and the domain/trade name intangible assets. As a result of these adjustments to the fair value of the definite-lived intangible assets, along with the related income tax impact, the amortization expense was reduced by $2.1 million from acquisition date to year end 2016. The following table summarizes the Company's purchase price allocation based on the fair values of the assets acquired and liabilities assumed (in thousands): Opening Balance Sheet Tangible current assets $ 7,455 Property plant and equipment 18,286 Developed technology 85,990 Domain/Trade names 27,990 Customer relationships 34,079 Other non current assets 277 Goodwill 231,612 Current liabilities (22,609 ) Deferred revenue (7,791 ) Deferred tax liability (33,607 ) Other long term liabilities (411 ) Purchase price consideration $ 341,271 6.3 years and six years, respectively. The trademarks and trade names are indefinite-lived intangible assets and are not amortized. The operations of Yodle have been incorporated with the existing Web.com Group Inc. operations subsequent to the transaction closing. As such, the determination of operating income and net income is not readily available nor would it be indicative of the standalone entity if presented. $4.8 million . Pro Forma Condensed Consolidated Results of Operations The Company has adjusted the results of operations to reflect the impact of amortizing into revenue, deferred revenue that was recorded at fair value. In addition, interest expense and amortization of intangible assets were adjusted to reflect the cost of the March 9, 2016 debt issued to finance the acquisition and the fair value of the intangible assets on the acquisition date, respectively. The following summarizes pro forma total revenue and net (loss) income (in thousands, except per share amounts): Twelve months ended December 31, 2016 Revenue $ 750,474 Net loss $ (4,547 ) Basic net loss per share $ (0.09 ) Diluted net loss per share $ (0.09 ) Basic weighted-average common shares outstanding 49,262 Diluted weighted-average common shares outstanding 49,262 Twelve months ended December 31, 2015 Revenue $ 740,742 Net income $ 54,159 Basic net income per share $ 1.08 Diluted net income per share $ 1.03 Basic weighted-average common shares outstanding 50,243 Diluted weighted-average common shares outstanding 52,488 Acquisition of TORCHx On May 31, 2016, the Company completed the acquisition of substantially all of the assets and certain liabilities of Brokerage Leader Inc. ("TORCHx"), a Florida corporation, which primarily consisted of customer relationships and developed technology intangible assets. TORCHx is a real estate platform built for agents and brokerages that features search engine optimization (SEO) and responsive design, customer relationship management (CRM) and other tools to help run successful online marketing campaigns. The Company paid $4.4 million for this business during the second quarter of 2016, of which $3.0 million was paid at closing and the remaining $1.5 million was paid on November 30, 2017. Business Combinations . As such, fair values have been assigned to the assets acquired and liabilities assumed and the excess of the total purchase price over the fair value of the net assets acquired is recorded as goodwill. The Company has estimated the fair value of certain intangible assets. The goodwill recorded from this acquisition represents business benefits the Company anticipates realizing from optimizing resources and cross-sale opportunities. The goodwill from the acquisition is deductible for tax purposes. Tangible current assets $ 17 Customer relationships 360 Developed technology 1,790 Goodwill 2,266 Deferred revenue (42 ) Purchase price consideration $ 4,391 four years and seven years, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets In accordance with ASC 350, the Company reviews goodwill and other indefinite-lived intangible asset balances for impairment on an annual basis and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of goodwill or indefinite-lived intangible assets below their carrying amount. As of December 31, 2017 and December 31, 2016 , the Company completed its annual impairment test of goodwill and other indefinite-lived intangible assets and determined these assets were not impaired. During the year ended December 31, 2016, the Company paid $1.6 million for registrar credentials. These credentials were recorded as other intangible assets of $2.6 million and are being amortized over 24 months. The remaining $1.0 million was recorded as a deferred tax liability. The following table summarizes changes in the Company’s goodwill balances as required by ASC 350-20 for the year ended December 31, 2017 and 2016 , respectively (in thousands): December 31, December 31, Goodwill balance at beginning of period $ 974,045 $ 741,439 Accumulated impaired goodwill at beginning of period (102,294 ) (102,294 ) Goodwill balance at beginning of period, net 871,751 639,145 Goodwill acquired during the period - Yodle - Note 5, Business Combinations — 231,612 Goodwill acquired during the period - TORCHx - Note 5, Business Combinations — 2,266 Goodwill acquired during the period - DonWeb - Note 5, Business Combinations 10,568 — Goodwill acquired during the period - Acquisio - Note 5, Business Combinations 4,264 — Foreign currency translation adjustments (921 ) (1,272 ) Goodwill balance at end of period, net * $ 885,662 $ 871,751 * Gross goodwill balances were $ 988.0 million and $974.0 million as of December 31, 2017 and 2016 , respectively. This includes accumulated impairment losses of $102.3 million . The Company’s intangible assets are summarized as follows (in thousands): December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Weighted-average Amortization Period in Years Indefinite-lived intangible assets: Domain/Trade names $ 161,251 $ — $ 161,251 Definite-lived intangible assets: Customer relationships 327,176 (185,353 ) 141,823 5.6 Developed technology 283,319 (215,545 ) 67,774 4.2 Other 8,673 (7,950 ) 723 1.0 Total * $ 780,419 $ (408,848 ) $ 371,571 *Cumulative foreign currency translation adjustments, reflecting the movement in currencies, decreased total intangible assets by approximately $0.2 million as of December 31, 2017. December 31, 2016 Gross Carrying Amount Accumulated Amortization Net Weighted-average Amortization Period in Years Indefinite-lived intangible assets: Domain/Trade names $ 159,805 $ — $ 159,805 Definite-lived intangible assets: Customer relationships 324,327 (157,998 ) 166,329 6.5 Developed technology 280,455 (195,695 ) 84,760 4.8 Other 7,394 (5,161 ) 2,233 1.4 Total * $ 771,981 $ (358,854 ) $ 413,127 *Cumulative foreign currency translation adjustments, reflecting the movement in currencies, decreased total intangible assets by approximately $1.0 million as of December 31, 2016. The weighted-average amortization period for the amortizable intangible assets as of December 31, 2017 , is approximately 5.1 years. Total amortization expense was $ 49.3 million , $ 56.8 million and $39.3 million for the years ended December 31, 2017 , 2016 and 2015 , respectively. As of December 31, 2017 , the amortization expense for the next five years and thereafter is as follows (in thousands): 2018 $ 45,677 2019 41,934 2020 39,277 2021 38,344 2022 26,703 Thereafter 18,385 Total $ 210,320

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment The Company's property and equipment are summarized as follows (in thousands): December 31, 2017 2016 Land $ 1,251 $ 416 Depreciable assets: Software 74,048 58,381 Computer equipment 61,966 56,037 Other equipment 9,993 9,410 Furniture and fixtures 7,888 7,773 Building and improvements 3,319 2,351 Leasehold improvements 19,352 17,195 Total depreciable assets 176,566 151,147 Accumulated depreciation (120,629 ) (98,431 ) Property and equipment, net $ 57,188 $ 53,132 Depreciation expense relating to depreciable assets amounted to $22.2 million , $21.2 million , and $17.1 million for the years ended December 31, 2017 , 2016 and 2015 , respectively. As of December 31, 2017 , 2016 and 2015 , the Company had unamortized computer software costs of $25.0 million , $21.1 million and $16.9 million , respectively. For the years ended December 31, 2017 , 2016 and 2015 , approximately $11.5 million , $9.8 million and $8.5 million respectively of depreciation expense related to computer software was recorded.

Commitments

Commitments	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments	Commitments Operating Leases The Company has lease obligations for its headquarters, technology administrative centers, sales and customer support centers and its eCommerce operations with varying renewal options on such locations. Rental expense for leased facilities and equipment amounted to approximately $16.7 million , $16.0 million and $7.5 million for the years ended December 31, 2017 , 2016 and 2015 , respectively. Accrued rent expense was $1.9 million and $ 1.8 million as of December 31, 2017 and 2016 , respectively. As of December 31, 2017 , future minimum rental payments required under operating leases that have initial or remaining non-cancellable terms in excess of one year are as follows (in thousands): Minimum Rental Payments Sublease Income Payments Net Minimum Rental Payments 2018 $ 15,431 $ (3,736 ) $ 11,695 2019 17,271 (3,736 ) 13,535 2020 17,056 (3,829 ) 13,227 2021 16,638 (4,015 ) 12,623 2022 14,364 (4,015 ) 10,349 Thereafter 61,287 (5,353 ) 55,934 $ 142,047 $ (24,684 ) $ 117,363 Included the minimum rental payments above are payments related to an office lease in Jacksonville, Florida for which the Company is contractually obligated; however, possession will revert to the Company in May 2019. Purchase Obligations Purchase obligations include corporate and marketing related sponsorships, general operating purchase obligations and long-term service contracts for data storage. As of December 31, 2017 , the Company’s unconditional purchase obligations are as follows (in thousands): Payment Due 2018 $ 20,388 2019 18,263 2020 14,790 2021 15,695 2022 715 Thereafter — $ 69,851 Standby Letters of Credit The Company utilizes letters of credit to back certain payment obligations relating to its facility operating leases and to meet certain vendor requirements. The Company had approximately $6.8 million and $7.3 million in standby letters of credit as of December 31, 2017 and 2016, respectively, $1.9 million of which was drawn against the Company’s revolving credit facility as of December 31, 2017 and 2016. The letters of credit are primarily to fulfill requirements under Yodle's facility operating leases. These letters of credit are funded by domestic money market accounts and are restricted for withdrawal based upon expiration dates required by the terms of the underlying lease agreements. The money market accounts are recorded as Other Assets in the consolidated balance sheets.

Valuation Accounts

Valuation Accounts	12 Months Ended
	Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract]
Valuation Accounts	Valuation Accounts The Company's valuation accounts are summarized as follows (in thousands): Additions Deductions Description Balance at beginning of year Charged to statement of comprehensive income Uncollectible accounts written off, net of recoveries or refunds to customers Balance at end of year Year Ended December 31, 2015: Allowance for doubtful accounts $ 1,705 $ 2,906 $ 2,796 $ 1,815 Refund liability 1,356 10,606 10,276 1,686 Total $ 3,061 $ 13,512 $ 13,072 $ 3,501 Year Ended December 31, 2016: Allowance for doubtful accounts $ 1,815 $ 1,640 $ 1,760 $ 1,695 Refund liability 1,686 11,337 11,118 1,905 Total $ 3,501 $ 12,977 $ 12,878 $ 3,600 Year Ended December 31, 2017: Allowance for doubtful accounts $ 1,695 $ 65 $ 306 $ 1,454 Refund liability 1,905 9,316 9,797 1,424 Total $ 3,600 $ 9,381 $ 10,103 $ 2,878

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value	Fair Value The Company defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Company applies the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels as follows: Level 1 -Quoted prices in active markets for identical assets or liabilities. Level 2 -Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 -Inputs that are generally unobservable and typically reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. The Company has financial assets and liabilities that are not required to be remeasured to fair value on a recurring basis. The Company’s cash and cash equivalents, accounts receivable, accounts payable, and accrued expenses approximate fair market value as of December 31, 2017 and December 31, 2016 due to the short maturity of these items. As of December 31, 2017 , the fair value and carrying value of the Company’s 2018 Notes totaled $255.3 million and $251.0 million , respectively. As of December 31, 2016 , the fair value and carrying value of the Company's 2018 Notes totaled $248.6 million and $239.2 million , respectively. The fair value of the First Lien Term Loan and the 2018 Notes, including the equity component, was calculated by taking the quoted market price for the instruments multiplied by the principal amount. This is based on a Level 2 fair value hierarchy calculation obtained from quoted market prices for the Company’s long-term debt instruments that may not be actively traded at each respective period end. The Revolving Credit Facility and Term Loan are variable rate debt instruments indexed to a 1-Month LIBOR that resets monthly, and as such, the fair value of the Term Loan and Revolving Credit Facility approximates the carrying value as of December 31, 2017 and December 31, 2016 . See Note 4, Long-term Debt , for additional information surrounding the Second Amendment.

Stock-Based Compensation and St

Stock-Based Compensation and Stockholders' Equity	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation and Stockholders' Equity	Stock-Based Compensation and Stockholders' Equity The Company records compensation expense for employee and director stock-based compensation plans based upon the fair value of the award in accordance with ASC 718, Compensation-Stock Compensation. Equity Incentive Plans At December 31, 2017 , the Company has the 2014 Equity Incentive Plan for the issuance of stock-based compensation, including but not limited to, common stock options and restricted shares to employees. In addition, the Company’s plan provides for grants of non-statutory stock options and restricted shares awards (“RSA’s”) to non-employee directors. The Company issues shares out of treasury stock, if available, otherwise new shares of common stock are issued upon the exercise of stock options and the granting of restricted shares. At December 31, 2017 , approximately 3.6 million shares remain available for future issuance under this plan. In addition, the Company has additional equity incentive plans that are established in conjunction with its acquisitions. These plans are considered one-time, inducement awards of incentive stock options, non-statutory stock options and restricted shares. Once the inducement awards are granted, no additional shares, including forfeitures and cancellations, are available for future grant under these plans. Generally, incentive stock options and non-statutory stock options vest ratably over three to four years, are contingent upon continued employment and expire ten years from the grant date. Restricted share awards generally vest 25 percent each year over a four year period. The Board of Directors or a committee thereof, administers all of the equity incentive plans and establishes the terms of options granted, including the exercise price, the number of shares subject to individual option awards and the vesting period of options, within the limits set forth in the plans. Options have a maximum term of 10 years and generally vest monthly over four years, as determined by the Board of Directors. Yodle Equity Grants In connection with the March 2016 Yodle acquisition, the Company granted 0.3 million restricted shares that vest annually over a four year period and 0.3 million stock options of which 25 percent vest one year from the date of grant and the remaining 75 percent vest monthly over a three year period for a total of four years. In addition, the Company converted unvested and out-of-the-money vested Yodle stock options to 1.3 million stock options of the Company. The total value of the converted stock options is approximately $8.3 million . Approximately $2.3 million has been recorded as additional consideration related to the vested options at the time of the closing of the acquisition. The remaining expense, net of forfeitures, is being amortized to stock compensation expense over the remaining service period of approximately 2 years . Performance Shares During 2017, 2016 and 2015, the Compensation Committee of the Board of Directors approved performance share equity awards. The targeted number of shares granted under a 100 percent payout scenario for the awards, in total, is 0.5 million common shares over the 3 years vesting periods, with approximately one-third vesting each year. The actual number of shares that may be earned and issued, if any, may range from 0% - 200% of the target number of shares granted. The range is based upon (1) the number of shares earned based upon the over achievement or under achievement of the financial measures for the annual performance period and (2) the number of shares earned being adjusted higher or lower depending on the performance of the Company's total shareholder return, compared against the Company's peer group. Compensation expense related to the performance shares for the years ended December 31, 2017 , 2016 and 2015, was approximately $3.5 million , $1.2 million , and $1.0 million , respectively. As of December 31, 2017 , there was approximately $0.5 million of unrecognized compensation expense related to the 2017 tranches of performance shares, which is expected to be recognized over a weighted average period of 0.1 years. The 2017 performance share period resulted in a payout of 71% of the underlying target shares, or approximately 0.1 million shares for the 2017, 2016 and 2015 tranches combined. Stock Options Compensation expense related to the Company's stock option plans was $7.8 million , $9.6 million and $10.4 million for the years ended December 31, 2017 , 2016 and 2015 , respectively. As of December 31, 2017 , the Company had $10.5 million of unrecognized compensation expense related to stock options, which is expected to be recognized over a weighted average period of 2.6 years . During the years ended December 31, 2017 , 2016 and 2015 , 1.2 million , 0.7 million and 0.7 million common shares were issued from options exercised, respectively. The total intrinsic value of options exercised during the years ended December 31, 2017 , 2016 , and 2015 was $9.4 million , $5.4 million , and $7.4 million , respectively. The fair value of options vested during the years ended December 31, 2017 , 2016 , and 2015 was $9.1 million , $10.8 million , and $11.3 million , respectively. The weighted-average grant-date fair value of an option granted during the years ended December 31, 2017 , 2016 , and 2015 was $8.64 , $8.01 , and $9.36 , respectively. The fair value of each option award is estimated on the grant date using the Black-Scholes option valuation model and the assumptions noted in the following table. Expected volatility rates are based on the Company’s historical volatility on the grant date. The Company estimates the expected term based on the historical exercise experience of our employees, which we believe is representative of future behavior. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant. Below are the assumption ranges used in calculating the fair value of options granted during the following periods: Year Ended December 31, 2017 2016 2015 Risk-free interest rate 1.84 - 2.06 % 1.11 - 1.39 % 1.52 -1.60 % Dividend yield — % — % — % Expected life (in years) 4.99 - 5.07 4.97 - 5.19 4.96 - 4.99 Volatility 42 - 45 % 47 - 54 % 55 - 57 % The following table summarizes option activity for all of the Company’s stock options: Shares Covered by Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) Balance, December 31, 2016 5,815,297 $ 16.06 Granted 1,211,925 $ 21.07 Exercised (1,173,494 ) $ 14.45 Forfeited (499,248 ) $ 19.27 Expired (88,447 ) $ 22.12 Balance, December 31, 2017 5,266,033 $ 17.20 5.81 $ 31,096 Exercisable at December 31, 2017 3,820,834 $ 16.17 4.73 $ 28,014 Price ranges of outstanding and exercisable options as of December 31, 2017 are summarized below: Outstanding Options Exercisable Options Exercise Price Number of Options Weighted- Average Remaining Life (Years) Weighted- Average Exercise Price Number of Options Weighted- Average Exercise Price $3.55 - $9.97 1,059,960 2.15 $ 7.32 1,059,960 $ 7.32 $10.95 - $15.96 1,392,729 4.61 $ 14.22 1,359,968 $ 14.22 $16.97 - $19.24 1,129,540 7.54 $ 17.92 577,059 $ 18.06 $19.48 - $24.88 1,053,615 9.07 $ 21.20 214,811 $ 21.16 $26.69 - $36.45 630,189 6.07 $ 32.37 609,036 $ 32.36 5,266,033 3,820,834 Restricted Stock Awards The fair value of each restricted stock award grant is based on the closing price of the Company’s stock on the date of grant and is amortized to compensation expense over its vesting period, which generally ranges between one and four years. Restricted stock is not transferable until vested. Compensation expense related to restricted stock plans for the years ended December 31, 2017 , 2016 and 2015 was approximately $11.9 million , $9.9 million and $8.7 million , respectively. As of December 31, 2017 , there was approximately $20.4 million of unrecognized compensation cost related to restricted stock outstanding, which is expected to be recognized over a weighted average period of 2.4 years . During the years ended December 31, 2017 , 2016 and 2015, approximately 0.2 million , 0.2 million and 0.1 million shares totaling approximately $4.6 million , $4.3 million and $2.4 million , respectively, were withheld by the Company for minimum income tax withholding requirements, primarily for restricted shares that vested. During the years ended December 31, 2017 , 2016 and 2015 , 0.9 million , 1.2 million and 0.5 million restricted common shares were granted, respectively. The following restricted stock activity occurred under the Company’s equity incentive plans during the year ended December 31, 2017 : Shares Weighted- Average Grant-Date Fair Value Restricted stock awards outstanding at December 31, 2016 1,552,723 $ 17.87 Granted 1,067,959 $ 20.46 Forfeited (205,889 ) $ 19.34 Lapse of restriction (released) (543,596 ) $ 18.95 Restricted stock awards outstanding at December 31, 2017 1,871,197 $ 18.87 Stock Repurchases On November 5, 2014, the Company's Board of Directors authorized a share repurchase program of up to $100.0 million of the Company's common stock expiring on December 31, 2016. In October 2016, the Company's Board of Directors authorized that the share repurchase program of the Company's outstanding securities be extended through December 31, 2018 and be increased by an additional $100.0 million . The aggregate amount of available shares available for repurchase under this program was $33.8 million at December 31, 2017 . Repurchases under the repurchase programs may take place in the open market or in privately negotiated transactions, including structured and derivative transactions such as accelerated share repurchase transactions, and may be made under a Rule 10b5-1 plan. During the years ended December 31, 2017 and 2016 , the Company repurchased common shares totaling $76.3 million and $28.6 million , respectively.

Common Shares Reserved

Common Shares Reserved	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Common Shares Reserved	Common Shares Reserved The Company had reserved the following number of shares of common stock for future issuance: December 31, 2017 2016 2015 Outstanding stock options, performance share units and restricted stock units 5,955,837 6,239,847 5,674,405 Options available for future grants and other awards 3,567,989 5,513,027 3,738,466 Total common shares reserved 9,523,826 11,752,874 9,412,871

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The domestic and foreign components of net income before income taxes for the years ended December 31, were as follows: 2017 2016 2015 Income before income taxes U.S. income $ 57,227 $ 15,510 $ 43,544 Foreign loss (1,673 ) (1,268 ) (1,843 ) Net income before income taxes $ 55,554 $ 14,242 $ 41,701 The provision (benefit) for income taxes consisted of the following for the years ended December 31,: 2017 2016 2015 Current expense: Federal $ 1,112 $ 944 $ 1,000 State 1,721 1,044 835 Foreign 1,379 550 147 Total current tax expense 4,212 2,538 1,982 Deferred expense (benefit): Federal (6,302 ) 9,096 (49,301 ) State 4,700 (1,289 ) (820 ) Foreign (685 ) (93 ) (121 ) Total deferred tax (benefit) expense (2,287 ) 7,714 (50,242 ) Total income tax expense (benefit) $ 1,925 $ 10,252 $ (48,260 ) As of December 31, 2017 and 2016 , the Company had federal net operating loss carry forwards (“NOLs”) at December 31, 2017 and 2016 of $182.2 million and $159.8 million . These NOLs expire in varying amounts beginning in 2020 through 2036 and are included in the schedule of deferred tax assets in the table below. See Note 2 for additional information related to the adoption of ASU 2016-09. As of December 31, 2017 , the Company had state NOLs of $378.6 million , which substantially expire in varying amounts beginning in 2020 through 2037. As of December 31, 2016 , the Company had state NOLs of $324.6 million . As of December 31, 2017 and December 31, 2016, the Company had foreign NOLs in the United Kingdom of $57.5 million and $51.5 million , respectively, which do not expire. As of December 31, 2017 and 2016 , the Company had Foreign Tax Credit (“FTC”) carry forwards of $1.2 million which expire 2018 through 2020. As of December 31, 2017 and 2016 , the Company had Research & Development (“R&D”) Tax Credit carry forwards of $0.5 million . The R&D credits begin to expire in 2028 . As of December 31, 2017 and 2016 , the Company had Alternative Minimum Tax (“AMT”) Credit carry forwards of approximately $5.2 million and $4.1 million , respectively which are included in the noncurrent deferred income tax accounts. The Act provides for the refund of AMT Credits in tax years 2018 through 2021. On December 22, 2017, the Act was signed into law making significant changes to the Internal Revenue Code. Changes include, but are not limited to, a federal corporate tax rate decrease from 35% to 21% for tax years beginning after December 31, 2017, the transition of U.S international taxation from a worldwide tax system to a territorial system, and a one-time transition tax on the mandatory deemed repatriation of foreign earnings. We have estimated our provision for income taxes in accordance with the Act and guidance available as of the date of this filing and as a result have recorded $22.9 million net tax benefit in the fourth quarter of 2017, the period in which the legislation was enacted. The provisional amount consisted of $26.1 million related to the remeasurement of certain deferred tax assets and liabilities, based on the rates at which they are expected to reverse in the future, offset by a $3.8 million increase in valuation allowance for certain state deferred tax assets in jurisdictions in which a valuation allowance was required to reflect the amount more likely than not be realized, a $1.9 million benefit from the reversal of a liability associated with the prior year earnings and profits, a $0.8 million deferred tax expense associated with the one-time transition tax on the mandatory deemed repatriation of foreign earnings based on cumulative foreign earnings of $5.1 million and a $0.5 million tax expense related to writing off certain deferred tax assets associated with the deductibility of certain compensation amounts. On December 22, 2017, Staff Accounting Bulletin No. 118 ("SAB 118") was issued to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Act. In accordance with SAB 118, the Company has determined that $22.9 million was the estimated benefit from the implementation of the Act was a provisional amount and a reasonable estimate at December 31, 2017. Additional work is necessary for a more detailed analysis of our deferred tax assets and liabilities and our historical foreign earnings as well as potential correlative adjustments. No additional income taxes have been provided for any remaining undistributed foreign earnings not subject to the transition tax and any additional outside basis difference inherent in these entities as these amounts continue to be indefinitely reinvested in foreign operations. Any subsequent adjustment to these amounts will be recorded to tax expense in 2018 when the analysis is complete. In establishing its deferred tax assets and liabilities, the Company makes judgments and interpretations based on the enacted tax laws and published tax guidance that are applicable to its operations. Deferred tax assets and liabilities are measured and recorded using currently enacted tax rates, which the Company expects will apply to taxable income in the years in which those temporary differences are recovered or settled. Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred tax assets and liabilities are as follows at December 31 (in thousands): 2017 2016 Noncurrent deferred tax assets: Deferred revenue $ 51,087 $ 76,887 NOLs 68,952 79,338 Stock compensation 6,548 9,509 Other deferred tax assets 15,986 20,243 142,573 185,977 Less: valuation allowance (30,364 ) (22,289 ) Total noncurrent deferred tax assets 112,209 163,688 Noncurrent deferred tax liabilities: Intangible basis 149,328 218,582 Discount on 2018 Notes 1,874 7,005 Other liabilities 11,816 18,004 Total noncurrent deferred tax liabilities 163,018 243,591 Net noncurrent deferred tax asset 233 232 Net noncurrent deferred tax liability (51,042 ) (80,135 ) Net deferred tax liability $ (50,809 ) $ (79,903 ) In 2017, we remeasured certain deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future, which is generally 21% in accordance with the Act. However, we are still analyzing certain aspects of the Act and refining our calculations, which could potentially affect the measurement of these balances or potentially give rise to new deferred tax amounts. The largest driver for the decrease in the net noncurrent deferred tax liabilities of $29.1 million was related to the adoption of ASU 2016-09 (See Note 2 , New Accounting Standards ) partially offset by deferred tax liabilities associated with the DonWeb acquisition of $1.2 million . Net noncurrent deferred tax assets of $0.2 million above as of December 31, 2017 and 2016 are included in Other Assets in the consolidated balance sheets. The valuation allowance at December 31, 2017 of $30.4 million includes $19.0 million and $10.2 million related to certain state and foreign net deferred tax assets, respectively, and $1.2 million related to FTC carry forwards, that are not more likely than not to be realized. During the year ended December 31, 2017 , the valuation allowance increased by $8.1 million . The net increase attributable to the Company's state valuation allowance was $6.6 million , mainly related to the increase in state deferred tax assets due to the federal tax rate change. The net increase attributable to the Company's foreign valuation allowance was $1.5 million , driven by current year foreign losses in jurisdictions in which a full valuation allowance was still required and foreign currency translation adjustments associated with the underlying foreign net deferred tax assets for which a full valuation allowance was required. During the year ended December 31, 2016, the valuation allowance decreased by $4.3 million . The net decrease attributable to the Company's state valuation allowance was $0.9 million , which included a $1.5 million increase related to current year book losses attributable to state jurisdictions in which a full valuation allowance was still required, offset by a $2.4 million decrease in our beginning-of-the-year valuation allowance to reflect the amount more likely than not to be realized. The $2.4 million decrease related to a state jurisdiction in which the applicable combined legal entities no longer operated on a 3-year cumulative pre-tax book loss position as of the fourth quarter of 2016. In addition to this positive evidence, the Company also determined that positive evidence associated with forecasted 2017 and future estimated taxable income for this state jurisdiction outweighed the negative evidence in the assessment of the portion of the valuation allowance release in the fourth quarter of 2016. The net decrease attributable to the Company's foreign valuation allowance was $3.4 million , which included a $0.6 million increase related to current year foreign losses for which a full valuation allowance was still required, offset by a $1.8 million decrease related to the decrease in foreign net deferred tax assets attributable to a UK tax rate change and a $2.2 million decrease related to foreign currency translation adjustments associated with the underlying foreign deferred tax assets for which a full valuation allowance was required. The net impact of this foreign currency translation adjustment included in Accumulated Other Comprehensive Loss is zero . During the year ended December 31, 2015, the valuation allowance decreased by $66.9 million . In December 2015, after weighing all evidence available, the Company determined that it was more likely than not that the Company would be able to realize substantially all its net U.S. Federal deferred tax assets and a portion of its net U.S. state deferred tax assets. As a result, the Company reversed $68.8 million of its beginning-of-the-year valuation allowance related to these deferred tax assets, which was partially offset by current year increases of $1.9 million related to certain foreign and state deferred tax assets for which it was determined that a valuation allowance was still required. The positive evidence that outweighed the negative evidence used in the Company’s assessment of the portion of the valuation allowance released in the fourth quarter of 2015 included, but was not limited to, the following: • The Company was no longer in a 3-year cumulative pre-tax book loss position as of the fourth quarter of 2015; • Strong positive trend in financial performance over the last two fiscal years, including each of the previous four quarters; and • Forecasted 2016 and future period taxable income. The Company will continue to evaluate its ability to realize our deferred tax assets. If future evidence suggests that any changes are required to reflect the amount of our deferred tax asset that is more likely than not to be realized, the Company will adjust its valuation allowance, as needed in the appropriate period. The provision (benefit) for income taxes differs from the amount computed by applying the statutory U.S. federal income tax rates as a result of the following for the years ended December 31: 2017 2016 2015 U.S. statutory rate 35.0 % 35.0 % 35.0 % State income taxes (net of federal tax benefit) 3.0 2.6 2.8 Stock-based compensation 0.6 24.1 4.7 Change in valuation allowance 4.7 (30.2 ) (160.5 ) Foreign rate differential 1.3 5.2 2.0 Non-deductible compensation costs 1.3 5.2 2.0 Change in tax rates (1.0 ) 13.6 (0.6 ) Foreign currency translation adjustment (1.4 ) 15.3 — Unremitted foreign earnings and profits — (0.8 ) 0.7 Transaction costs 0.5 4.9 — Tax impacts of the Act (41.2 ) — — Other 0.7 (2.9 ) (1.9 ) Income tax expense (benefit) 3.5 % 72.0 % (115.8 ) % The Company applies ASC 740, Income Taxes , which clarifies the accounting for uncertainty in income tax positions recognized in financial statements. The Company has filed income tax returns for years through 2016. These returns are subject to examination by the taxing authorities in the respective jurisdictions generally for three or four years after they are filed. NOLs and certain tax credits generated in these periods, as well as any carry forwards from prior periods, remain subject to adjustment by taxing authorities generally for three or four years after the years in which such NOLs and credit carry forwards are utilized. The Company’s policy is that it recognizes interest and penalties accrued on any unrecognized tax benefits as a component of income tax expense. The Company’s unrecognized tax benefits are summarized as follows (in thousands): Balance at December 31, 2014 $ 3,431 Additions in unrecognized tax benefits – prior year tax positions 73 Additions in unrecognized tax benefits – current year tax positions 300 Reductions in unrecognized tax benefits – current year tax positions (62 ) Lapse of statute of limitations (248 ) Balance at December 31, 2015 $ 3,494 Additions in unrecognized tax benefits – prior year tax positions 50 Additions in unrecognized tax benefits – current year tax positions 540 Lapse of statute of limitations (225 ) Balance at December 31, 2016 $ 3,859 Additions in unrecognized tax benefits – prior year tax positions 1,565 Additions in unrecognized tax benefits – current year tax positions 656 Reductions in unrecognized tax benefits – prior year tax positions (546 ) Lapse of statute of limitations (42 ) Balance at December 31, 2017 $ 5,492 As of December 31, 2017 and 2016 , the Company had $4.5 million and $3.2 million , respectively, of total unrecognized tax benefits, which could favorably affect the effective rate. The Company recorded a net expense/(benefit) related to interest and penalties of $2.5 million , $0.0 million , and $ (0.2) million million, during 2017, 2016, and 2015, respectively. The total accrued interest and penalties as of December 31, 2017 and December 31, 2016 , was $2.6 million and $0.1 million , respectively. Refer to footnote 5, Business Combinations for further information on current year additions to unrecognized tax benefits in connection with our DonWeb acquisition.

Employee Savings Plans

Employee Savings Plans	12 Months Ended
	Dec. 31, 2017
Retirement Benefits [Abstract]
Employee Savings Plans	Employee Savings Plans The Company has a qualifying defined contribution 401(k) plan under the Internal Revenue Code. All employees at the date of hire are eligible to participate in the plan. Each participant may contribute to the plan up to the maximum allowable amount as determined by the Federal Government. Employee 401(k) deferrals are 100% vested. Company contributions are subject to a vesting schedule based on years of service. The Company recorded contribution expense of $2.4 million , $1.8 million and $1.1 million during the years ended December 31, 2017 , 2016 , and 2015 , respectively. Effective July 1, 2012, the Company established an unfunded deferred compensation defined contribution plan for key management and highly compensated employees. The purpose of the plan is to provide a select group of employees who contribute significantly to the future business success of the Company with supplemental retirement income benefits through the deferral of base salary and other compensation and through additional discretionary company matching contributions. Deferral elections are made at the discretion of the employee and would be an amount or percentage of the employee’s compensation. Each plan year, the Company may, but is not required to, make a matching contribution to the plan on behalf of the participant. In addition, matching contributions need not be uniform among participants. The Company recorded contribution expense of $0.1 million for each of the years ended December 31, 2017 , 2016 , and 2015 . Also effective July 1, 2012, the Company established an unfunded supplemental retirement defined contribution plan for key management. The purpose of the plan is to provide a select group of management or highly compensated employees who contribute significantly to the future business of the company with supplemental retirement income through discretionary company contributions. Each plan year, the Company may, but is not required to, make a discretionary contribution to the plan on behalf of a participant. The Company is under no obligation to make a contribution for the plan year and contributions need not be uniform among participants. The Company recorded contribution expense of $0.6 million and $0.8 million for the years ended December 31, 2016 , and 2015 , respectively. No contribution was made for the year ended December 31, 2017 .

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies On July 13, 2017, the Company was named as a defendant in a lawsuit filed in the United States District Court for the Middle District of Florida. The plaintiff in the case alleges that the Company infringed upon certain copyrights, misappropriated trade secrets, breached contracts, and violated the Florida Deceptive and Unfair Trade Practices Act in connection with the Company’s Ignite products. The plaintiff seeks damages in an unspecified amount, plus the recovery of its costs and attorneys’ fees incurred in the suit. The Company believes that it has meritorious defenses against the asserted claims and is no longer offering the afore mentioned products for sale. A preliminary injunction against the Company was entered and the appeal is pending. The Company has reserved an immaterial amount which it determined to be commensurate with the liability, damage and coverage issues presented by the subject claims at this early stage of the pending lawsuit. It is also not currently possible to reasonably estimate the amount or range of any amounts that the Company may be required to pay as damages in the event that liability is found against the Company in excess of the amount reserved without plaintiff providing more detail on its claims and without expert discovery on the damage and apportionment issues presented by the claims. From time to time, the Company and its subsidiaries receive inquiries from foreign, federal, state and local regulatory authorities or are named as defendants in various legal actions that are incidental to our business and arise out of or are related to claims made in connection with our marketing practices, customer and vendor contracts and employment related disputes. We believe that the resolution of these investigations, inquiries o r legal actions will not have a material adverse effect on our financial position, marketing practices or results of operations. There were no material legal matters for which a loss was reasonably possible or probable and estimable at December 31, 2017 other than the item noted above.

Quarterly Results for 2017 and

Quarterly Results for 2017 and 2016 (Unaudited) Quarterly Results for 2017 and 2016 (Unaudited)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results for 2017 and 2016 (Unaudited)	Quarterly Results for 2017 and 2016 (UNAUDITED) Quarter Ended (in thousands, except per share amounts) March 31, June 30, September 30, December 31, Total Year 2017 Revenue $185,118 $186,731 $188,567 $188,845 $ 749,261 Income from operations $20,542 (1) $22,998 $23,602 $21,473 (2) $ 88,615 Net income $6,518 (3) $8,046 (4) $8,300 $30,765 (5) $ 53,629 Basic EPS $0.13 $0.16 $0.17 $0.65 $ 1.10 Diluted EPS $0.13 $0.16 $0.16 $0.62 $ 1.06 2016 Revenue $144,798 $187,818 $190,686 $187,203 $ 710,505 Income from operations $6,912 (6) $7,578 $18,093 (7) $12,121 (8) $ 44,704 Net income (loss) $337 $(1,606) $3,346 $1,913 (9) $ 3,990 Basic EPS (loss) $0.01 $(0.03) $0.07 $0.04 $ 0.08 Diluted EPS (loss) $0.01 $(0.03) $0.07 $0.04 $ 0.08 (1) On January 31, 2017, the Company acquired 100% of the outstanding shares of DonWeb. The Company paid approximately $8.6 million at closing. The Company may pay the seller additional consideration of up to $2.0 million on January 31, 2021, present valued to $1.7 million as of the acquisition date, for total consideration of $10.3 million . Transaction costs associated with the acquisition were not significant. (2) On November 1, 2017, the Company acquired certain assets and liabilities of Acquisio, Inc., a provider of online advertising management. The Company paid approximately $8.7 million from acquisition closing through December 31, 2017. Additionally, the Company may pay additional consideration of up to approximately $0.6 million . Transaction costs associated with the acquisition were not significant. (3) The Consolidated Statement of Comprehensive Income includes an asset impairment charge of $0.1 million from writing down domain name inventory. (4) The Consolidated Statement of Comprehensive Income includes restructuring charges of $0.4 million associated with adjusting the estimated real estate taxes on a portion of our New York, New York office lease space that was previously vacated which was exited in December 2016 (5) The Consolidated Statement of Comprehensive Income includes an asset impairment charge of $0.2 million from abandoning certain technology and restructuring charges of approximately $0.5 million for an early lease termination payment related to the Herndon, VA facility. In the fourth quarter ended December 31, 2017, the Company recorded a tax benefit of $17.8 million primarily from adopting provisions of the Act. (6) On March 9, 2016, the Company acquired 100% of the outstanding shares of Yodle, Inc. and paid approximately $300.3 million adjusted for, among other things, Yodle's cash and outstanding debt and transaction related expenses. In addition to the consideration, the Company incurred approximately $3.9 million of acquisition-related transaction expenses which are reflected in the General and Administrative line item of the Consolidated Statement of Comprehensive Income. (7) The Consolidated Statement of Comprehensive Income includes an asset impairment charge of $2.0 million from writing down domain name inventory. (8) The Consolidated Statement of Comprehensive Income includes an asset impairment charge of $7.1 million for leasehold improvements that were abandoned as part of exiting the operating lease acquired in the March 2016 Yodle acquisition. In addition, there is $1.6 million of restructuring charges that were recorded during the fourth quarter ended December 31, 2016, which primarily consists of the estimated expense for lease obligations offset by sublease income expected. (9) Included in the fourth quarter ended December 31, 2016 is the reversal of $2.4 million respectively, of valuation allowance for certain U.S. federal and state deferred tax assets, which contributed to the Company recording income tax expense of $2.3 million .

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Accumulated Other Comprehensive Loss	The components of accumulated other comprehensive loss are as follows (in thousands): December 31, 2017 December 31, 2016 Foreign currency translation adjustments $ (4,503 ) $ (4,019 ) Unrealized gains on investments — (1 ) Total accumulated other comprehensive loss $ (4,503 ) $ (4,020 )

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Effective February 6, 2015, the Company elected Mr. John A. Giuliani to serve on its Board of Directors. Mr. Giuliani serves as President, Chief Executive Officer and Director of Conversant, a personalized digital marketing platform, which was sold to AllianceData in December 2014. Mr. Giuliani joined Conversant after the acquisition of Dotomi, a dynamic display ad optimization company, where he had served as Chief Executive Officer. The Company incurred $0.6 million , $0.7 million and $0.9 million of expense related to services provided by Conversant during the years ended December 31, 2017 , 2016 and 2015 , respectively.

Restructuring

Restructuring	12 Months Ended
	Dec. 31, 2017
Restructuring and Related Activities [Abstract]
Restructuring	Restructuring Restructuring charges of $1.3 million and $3.6 million and $0.6 million were incurred during the years ended December 31, 2017 , 2016 and 2015 , respectively. The restructuring expense for the year ended December 31, 2017 included $0.8 million of primarily lease restructuring costs from adjusting the estimated real estate taxes on a portion of our New York, New York office lease space that was previously vacated which was exited in December 2016 and severance expense associated with the elimination of certain Yodle positions. An additional $0.5 million in expense resulted from an early lease termination payment for an office in Herndon, Virginia. The lease restructuring costs and severance expense from terminating certain positions associated with Yodle for the year ended December 31, 2016 were $1.4 million and $2.2 million , respectively.

Asset Impairments Asset Impairm

Asset Impairments Asset Impairments	12 Months Ended
	Dec. 31, 2017
Restructuring and Related Activities [Abstract]
Asset Impairments	Asset Impairments The Company recorded $0.3 million in asset impairment charges during the year ended December 31, 2017 . The charges included $0.2 million for the impairment of certain technology and $0.1 million of asset impairment charges related to domain name inventory. During the year ended December 31, 2016 , asset impairment charges of $9.1 million resulted from a $7.1 million charge for the impairment of leasehold improvements, furniture and fixtures, and office equipment due to exiting a portion of the Yodle offices leased in New York and a $2.0 million charge related to domain name inventory.

The Company and Summary of Si27

The Company and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Company	Description of Company Web.com Group, Inc. ("Web.com" or "the Company") provides a full range of Internet services to small businesses to help them compete and succeed online. Web.com meets the needs of small businesses anywhere along their lifecycle with affordable, subscription-based solutions including domains, hosting, website design and management, search engine optimization, online marketing campaigns, local sales leads, social media, mobile products and eCommerce solutions. The Company has reviewed the criteria of Accounting Standards Codification (“ASC”) 280-10, Segment Reporting, and has determined that the Company is comprised of only one segment, web services and products.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements in conformity with generally accepted accounting principles ("GAAP") in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.
Foreign Currency Translation	Foreign Currency Translation The functional currency of the Company’s United Kingdom-based operations acquired in July 2014 is the British Pound and the functional currency of the Company's Argentine-based sales operations acquired in January 2017 is the Argentine Peso. The Company translates the financial statements of these subsidiaries to U.S. dollars using month-end rates of exchange for assets and liabilities, historical rates of exchange for equity and average rates of exchange for revenues, costs, and expenses. Translation gains and losses are recorded in accumulated other comprehensive income as a component of stockholders’ equity. In addition, the Company’s foreign operations include a customer service center, technology center and an outbound sales center in Canada and a technology center in Argentina. The Company records foreign currency transaction gains and losses, and remeasurement of local currencies of these foreign subsidiaries where the functional currency is different from the local foreign currency in the consolidated statements of income.
Principles of Consolidation	Principles of Consolidation The Company’s consolidated financial statements include the assets, liabilities and the operating results of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated.
Revenue Recognition and Deferred Revenue	Revenue Recognition and Deferred Revenue The Company recognizes revenue in accordance with ASC 605, Revenue Recognition . The Company recognizes revenue when all of the following conditions are satisfied: (1) there is persuasive evidence of an arrangement; (2) the service has been provided to the customer; (3) the amount of fees to be paid by the customer is fixed or determinable; and (4) the collection of our fees is reasonably assured. Thus, the Company recognizes subscription revenue on a daily basis, as services are provided. Customers are billed for the subscription on a monthly, quarterly, semi-annual, annual or on a multi-year basis, at the customer’s option. For all of the Company’s customers, regardless of the method the Company uses to bill them, subscription revenue is recorded as deferred revenue in the accompanying consolidated balance sheets. As services are performed, the Company recognizes subscription revenue on a daily basis over the applicable service period. When the Company provides a free trial period, the Company does not begin to recognize subscription revenue until the trial period has ended and the customer has been billed for the services. The Company offers certain integrated online marketing services where the fee charged to the customer includes a media budget (”Pay-Per-Click” or “PPC”). Revenue for PPC services are recognized ratably over the period of service. The Company accounts for our multi-element arrangements in accordance with ASC 605-25, Revenue Recognition: Multiple-Element Arrangement. The Company may sell multiple products or services to customers at the same time. For example, we may design a customer website and separately offer other services such as hosting and marketing or a customer may combine a domain registration with other services such as private registration or e-mail. In accordance with ASC 605-25, each element is accounted for as a separate unit of accounting provided the following criteria is met: the delivered products or services have value to the customer on a standalone basis; and for an arrangement that includes a general right of return relative to the delivered products or services, delivery or performance of the undelivered product or service is considered probable and is substantially controlled by the Company. The Company considers a deliverable to have standalone value if the product or service is sold separately by us or another vendor or could be resold by the customer. Our products and services do not include a general right of return relative to the delivered products. In cases where the delivered products or services do not meet the separate unit of accounting criteria, the deliverables are combined and treated as one single unit of accounting for revenue recognition. The Company assigns value to the separate units of accounting in multiple-element arrangements using the relative selling price method which is calculated by taking the standalone selling price of each unit to the total selling price of the arrangement, multiplied by the total sales price. Typically, the deliverables within multiple-element arrangements are provided over the same service period, and therefore revenue is recognized over the same period. To determine the selling price in multiple-element arrangements, the Company establishes vendor-specific objective evidence of the selling price using the price of the deliverable when sold separately. If we are unable to determine the selling price because vendor-specific objective evidence does not exist, the Company will first look to third party evidence, and if that is not sufficient, it will determine an estimated sales price through consultation with and approval by the Company’s management, taking into consideration the Company’s relative costs, target profit margins, and any other information gathered during this process. Generally, compensation related sales costs are expensed as incurred.
Cost of Revenue	Cost of Revenue Cost of revenue consists of expenses related to compensation of our web page development staff, domain name registration costs, directory listing fees, eCommerce store design, online marketing costs for services provided, billing costs, hosting expenses, and allocated occupancy overhead costs. The Company allocates occupancy overhead costs such as rent and utilities to all departments based on headcount. Accordingly, general overhead expenses are reflected in each cost of revenue and operating expense category.
Sales and Marketing Expense	Sales and Marketing Expense The Company's direct marketing expenses include the costs associated with the online marketing channels used to promote our services and acquire customers. These channels include search marketing, affiliate marketing and partnerships. Sales and marketing costs consist primarily of compensation and related expenses for our sales and marketing staff as well as our customer support staff and allocated occupancy overhead costs. Sales and marketing expenses also include marketing programs, such as advertising, corporate sponsorships and other corporate events and communications.
Technology and development	Technology and development Technology and development represents costs associated with creation, development and distribution of our products and websites. Technology and development expenses primarily consist of headcount-related costs associated with the design, development, deployment, testing, operation, enhancement of our products and costs associated with the data centers and all systems infrastructure costs supporting those products as well as all administrative platforms and allocated occupancy overhead costs.
General and Administrative Expense	General and Administrative Expense General and administrative expenses consist of compensation and related expenses for executive, finance, and administration, as well as professional fees, corporate development costs, other corporate expenses, and allocated occupancy overhead costs.
Depreciation and Amortization Expense	Depreciation and Amortization Expense Depreciation and amortization expenses relate primarily to our intangible assets recorded due to the acquisitions we have completed, as well as depreciation expense from computer and other equipment, internally developed software, furniture and fixtures, and building and improvement expenditures.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include cash on hand and bank demand deposit accounts. For purposes of presentation in the Consolidated Balance Sheets, the Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents.
Concentrations of Credit Risk	Concentrations of Credit Risk Financial instruments that potentially subject the Company to concentration of credit risk consist principally of cash and cash equivalents and trade receivables. The Company invests its cash in cash and credit instruments of highly rated financial institutions; four institutions hold 97% of the Company's total cash and cash equivalents. Concentrations of credit risk with respect to trade accounts receivable are limited due to the large number of customers comprising the Company’s customer base and their geographic dispersion. The Company has not incurred any significant credit related losses.
Accounts Receivable	Accounts Receivable Accounts receivable are recorded on the balance sheet at net realizable value. The Company uses historical collection percentages and customer-specific information, when available, to estimate the amount of trade receivables that are uncollectible and establishes reserves for uncollectible balances based on this information. Generally, receivables are classified as past due after 60 days . Trade receivables are written off once collection efforts are exhausted. The Company does not generally require deposits or other collateral from customers. Bad debt expense reported in operating expenses excludes provisions made to the allowance for doubtful accounts for anticipated refunds and automated clearinghouse returns that are recorded as adjustments to revenue.
Deferred Expenses	Deferred Expenses Deferred expenses primarily consist of prepaid domain name registry fees that are paid in full at the time a domain name is registered. The registry fees are recognized on a straight-line basis over the term of the domain registration period.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The Company continued to perform the quantitative tests to determine if the carrying value of our goodwill and indefinite-lived intangible assets are impaired for our annual test at December 31, 2017 . The Company tests goodwill and intangible assets for impairment using one reporting unit. A market approach is used to test goodwill for impairment, while our intangible asset test uses the income approach. The following is not a complete discussion of the Company’s calculations, but outlines the general assumptions and steps for testing goodwill and intangible assets for impairment: Goodwill The first step involves comparing the fair value of our reporting unit to its carrying value, including goodwill. The Company uses a market capitalization approach after considering an estimated control premium. If the carrying value exceeds its fair value, the second step of the test is performed by comparing the carrying value of goodwill to its implied fair value. An impairment charge is recognized for the excess of the carrying value over its implied fair value. Intangible Assets The Company estimates the fair value of indefinite-lived intangibles using the relief-from-royalty method, a form of the income approach. It is based on the principle that ownership of the intangible asset relieves the owner of the need to pay a royalty to another party in exchange for rights to use the asset. Key assumptions in estimating the fair value include, among other items, forecasted revenue, royalty rates, tax rates, and the benefit of tax amortization. The Company employs a weighted-average cost of capital approach to determine the discount rate used in our projections. The determination of the discount rate includes certain factors such as, but not limited to, the risk-free rate of return, market risk, size premium, and the overall level of inherent risk. If the carrying value of the intangibles exceeds its fair value, an impairment charge is recognized. The results of these analyses indicated that the Company’s goodwill and indefinite-lived intangible assets were not impaired at December 31, 2017 .
Research and Development Costs	Technology and Development Costs The Company expenses technology and development costs as incurred.
Property and Equipment	Property and Equipment Property and equipment, including software, are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are provided over the estimated useful lives of the assets using the straight-line method.
Advertising	Advertising Advertising costs are expensed as incurred. Included in advertising are general marketing, corporate sponsorships as well as online marketing and banner advertisements.
Income Taxes	Income Taxes The Company accounts for income taxes using the liability method under the provisions of ASC 740, Income Taxes . ASC 740 requires recognition of deferred tax liabilities and assets for the expected future tax consequences of events that have been included in the financial statements or tax returns. Under this method, deferred tax liabilities and assets are determined based on the difference between the financial statement and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the difference is expected to reverse. Further, deferred tax assets are recognized for the expected realization of available deductible temporary differences and net operating loss and tax credit carry forwards. ASC 740 requires companies to assess whether a valuation allowance should be established against deferred tax assets based on consideration of all available evidence using a “more likely than not” threshold. In making such assessments, the Company considers the expected reversals of our existing deferred tax liabilities within the applicable jurisdictions and carry forward periods, based on our existing Section 382 limitations. The Company does not consider deferred tax liabilities related to indefinite lived intangibles or tax deductible goodwill as a source of future taxable income. Additionally, the determination of the amount of deferred tax assets which are more likely than not to be realized is also dependent on projections of future earnings, which are subject to uncertainty and estimates that may change given economic conditions and other factors. A valuation allowance is recorded to reduce our deferred tax assets to the amount that is “more likely than not” to be realized based on the above methodology. The Company reviews the adequacy of the valuation allowance on an ongoing basis and adjusts our valuation allowance in the appropriate period, if applicable. The Company records liabilities for uncertain tax positions related to federal, state and foreign income taxes in accordance with ASC 740. These liabilities reflect the Company’s best estimate of its ultimate income tax liability based on the tax code, regulations, and pronouncements of the jurisdictions in which we do business. Estimating our ultimate tax liability may involve significant judgments regarding the application of complex tax regulations across many jurisdictions. If the Company’s actual results differ from estimated results, our effective tax rate and tax balances could be affected. As such, these estimates may require adjustment in the future as additional facts become known or as circumstances change. If applicable, the Company will adjust the income tax provision in the appropriate period.
Stock-Based Employee Compensation	Stock-Based Employee Compensation The Company grants to our employees and directors options to purchase common stock at exercise prices equal to the quoted market values of the underlying stock at the time of each grant. The fair value of each option award as of the grant date is determined using the Black-Scholes option pricing valuation model in accordance with ASC 718, Compensation-Stock Compensation . In addition, the Company grants performance-based share equity awards that contain service, performance and market conditions. The performance conditions are assessed at each reporting period and compensation expense is recorded to reflect the probable attainment of each condition. The market conditions are valued using a Monte Carlo simulation model. The valuation is prepared with the assistance of a third-party specialist to estimate the grant date fair value of the award. The fair value of all stock awards is recognized in compensation expense on a straight-line basis over the requisite service period for awards expected to vest.

The Company and Summary of Si28

The Company and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Property and Equipment Useful Life	The asset lives used are presented in the table below: Estimated Useful Life in Years Computer equipment 3 - 5 Software 2 - 3 Furniture and fixtures 5 Other equipment 5 - 6 Buildings 30 Building improvements 15 Leasehold improvements Shorter of asset’s life The Company's property and equipment are summarized as follows (in thousands): December 31, 2017 2016 Land $ 1,251 $ 416 Depreciable assets: Software 74,048 58,381 Computer equipment 61,966 56,037 Other equipment 9,993 9,410 Furniture and fixtures 7,888 7,773 Building and improvements 3,319 2,351 Leasehold improvements 19,352 17,195 Total depreciable assets 176,566 151,147 Accumulated depreciation (120,629 ) (98,431 ) Property and equipment, net $ 57,188 $ 53,132

Net Earnings Per Common Share N

Net Earnings Per Common Share Net Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Computation of Basic And Diluted Net Loss Income per Common Share	The following table sets forth the computation of basic and diluted net earnings per common share (in thousands, except per share amounts): 2017 2016 2015 Net income $ 53,629 $ 3,990 $ 89,961 Basic weighted average common shares 48,629 49,262 50,243 Dilutive effect of stock options 1,399 1,265 1,757 Dilutive effect of restricted shares 612 352 426 Dilutive effect of performance shares 14 1 16 Dilutive effect of the assumed conversion of the 2018 Notes — — — Diluted weighted average common shares 50,654 50,880 52,442 Basic earnings per share: Net income per common share $ 1.10 $ 0.08 $ 1.79 Diluted earnings per share: Net income per common share $ 1.06 $ 0.08 1.72

Long-term Debt Long-term Debt (

Long-term Debt Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Outstanding Long-Term Debt and Interest Rates	Outstanding long-term debt and the effective interest rates at December 31, 2017 and 2016 consist of the following (in thousands): December 31, December 31, Revolving Credit Facility maturing 2021, 3.93%, based on LIBOR plus 2.50% $ 10,000 $ 47,094 Term Loan due 2021, 3.98%, based on LIBOR plus 2.50%, less unamortized discount of $3,800 at December 31, 2017, effective rate of 4.33% 385,934 377,851 Senior Convertible Notes, maturing 2018, 1.00%, less unamortized discount of $7,714 at December 31, 2017, effective rate of 5.88% 251,036 239,196 Total Outstanding Debt, less unamortized discount of $11,514 at December 31, 2017 646,970 664,141 Less: Current Portion of Long-Term Debt, less unamortized discount of $379 at December 31, 2017 (16,612 ) (16,847 ) Long-Term Portion, less unamortized discount of $11,135 at December 31, 2017 $ 630,358 $ 647,294 * The Compan y has $248.1 million of av ailable borrowings under the Revolving Credit Facility as of December 31, 2017 .
Principal Payments Due for All Long-term Debt	Total estimated principal payments due for the next five years as of December 31, 2017 are as follows (in thousands): 2018 $ 16,990 2019 41,370 2020 44,128 2021 555,996 Total principal payments $ 658,484 Included in fiscal 2021 payments is $248.1 million related to the 2018 Senior Convertible Notes, as the Company has the intent and ability to refinance these obligations.

Business Combinations Business

Business Combinations Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2017
Business Acquisition [Line Items]
Schedule of Pro Forma Information	The following summarizes pro forma total revenue and net (loss) income (in thousands, except per share amounts): Twelve months ended December 31, 2016 Revenue $ 750,474 Net loss $ (4,547 ) Basic net loss per share $ (0.09 ) Diluted net loss per share $ (0.09 ) Basic weighted-average common shares outstanding 49,262 Diluted weighted-average common shares outstanding 49,262 Twelve months ended December 31, 2015 Revenue $ 740,742 Net income $ 54,159 Basic net income per share $ 1.08 Diluted net income per share $ 1.03 Basic weighted-average common shares outstanding 50,243 Diluted weighted-average common shares outstanding 52,488
Acquisio Inc.
Business Acquisition [Line Items]
Schedule of Purchase Price Allocation	The following table summarizes the Company's preliminary purchase price allocation based on the fair values of the assets acquired and the liabilities assumed (in thousands): November 1, 2017 Tangible current assets $ 130 Property plant and equipment 376 Domain/Trade names 401 Developed Technology 2,698 Customer relationships 1,908 Goodwill 4,264 Current liabilities (274 ) Deferred revenue (93 ) Other long term liabilities (129 ) Purchase price consideration $ 9,281
DonWeb
Business Acquisition [Line Items]
Schedule of Purchase Price Allocation	The following table summarizes the Company's preliminary purchase price allocation based on the fair values of the assets acquired and the liabilities assumed (in thousands): As of January 31, 2017 Adjustments to Opening Balance Sheet As of December 31, 2017 Tangible current assets $ 1,145 $ (74 ) $ 1,071 Property plant and equipment 2,392 (48 ) 2,344 Domain/Trade names — 990 990 Non-competes — 236 236 Customer relationships 4,140 (2,420 ) 1,720 Other non current assets 2,849 (38 ) 2,811 Goodwill 9,519 1,049 10,568 Current liabilities (837 ) (901 ) (1,738 ) Deferred revenue (2,860 ) 1,276 (1,584 ) Other long term liabilities (6,000 ) (70 ) (6,070 ) Purchase price consideration $ 10,348 $ — $ 10,348
Yodle, Inc.
Business Acquisition [Line Items]
Schedule of Purchase Price Allocation	The following table summarizes the Company's purchase price allocation based on the fair values of the assets acquired and liabilities assumed (in thousands): Opening Balance Sheet Tangible current assets $ 7,455 Property plant and equipment 18,286 Developed technology 85,990 Domain/Trade names 27,990 Customer relationships 34,079 Other non current assets 277 Goodwill 231,612 Current liabilities (22,609 ) Deferred revenue (7,791 ) Deferred tax liability (33,607 ) Other long term liabilities (411 ) Purchase price consideration $ 341,271
Brokerage Leader, Inc.(TORCHx)
Business Acquisition [Line Items]
Schedule of Purchase Price Allocation	ts and liabilities acquired are as follows (in thousands): Tangible current assets $ 17 Customer relationships 360 Developed technology 1,790 Goodwill 2,266 Deferred revenue (42 ) Purchase price consideration $ 4,391

Goodwill and Intangible Assets

Goodwill and Intangible Assets Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Changes In Goodwill	The following table summarizes changes in the Company’s goodwill balances as required by ASC 350-20 for the year ended December 31, 2017 and 2016 , respectively (in thousands): December 31, December 31, Goodwill balance at beginning of period $ 974,045 $ 741,439 Accumulated impaired goodwill at beginning of period (102,294 ) (102,294 ) Goodwill balance at beginning of period, net 871,751 639,145 Goodwill acquired during the period - Yodle - Note 5, Business Combinations — 231,612 Goodwill acquired during the period - TORCHx - Note 5, Business Combinations — 2,266 Goodwill acquired during the period - DonWeb - Note 5, Business Combinations 10,568 — Goodwill acquired during the period - Acquisio - Note 5, Business Combinations 4,264 — Foreign currency translation adjustments (921 ) (1,272 ) Goodwill balance at end of period, net * $ 885,662 $ 871,751 * Gross goodwill balances were $ 988.0 million and $974.0 million as of December 31, 2017 and 2016 , respectively. This includes accumulated impairment losses of $102.3 million .
Summary of Intangible Assets	The Company’s intangible assets are summarized as follows (in thousands): December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Weighted-average Amortization Period in Years Indefinite-lived intangible assets: Domain/Trade names $ 161,251 $ — $ 161,251 Definite-lived intangible assets: Customer relationships 327,176 (185,353 ) 141,823 5.6 Developed technology 283,319 (215,545 ) 67,774 4.2 Other 8,673 (7,950 ) 723 1.0 Total * $ 780,419 $ (408,848 ) $ 371,571 *Cumulative foreign currency translation adjustments, reflecting the movement in currencies, decreased total intangible assets by approximately $0.2 million as of December 31, 2017. December 31, 2016 Gross Carrying Amount Accumulated Amortization Net Weighted-average Amortization Period in Years Indefinite-lived intangible assets: Domain/Trade names $ 159,805 $ — $ 159,805 Definite-lived intangible assets: Customer relationships 324,327 (157,998 ) 166,329 6.5 Developed technology 280,455 (195,695 ) 84,760 4.8 Other 7,394 (5,161 ) 2,233 1.4 Total * $ 771,981 $ (358,854 ) $ 413,127 *Cumulative foreign currency translation adjustments, reflecting the movement in currencies, decreased total intangible assets by approximately $1.0 million as of December 31, 2016.
Amortization Expense for Next Five Years	As of December 31, 2017 , the amortization expense for the next five years and thereafter is as follows (in thousands): 2018 $ 45,677 2019 41,934 2020 39,277 2021 38,344 2022 26,703 Thereafter 18,385 Total $ 210,320

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment	The asset lives used are presented in the table below: Estimated Useful Life in Years Computer equipment 3 - 5 Software 2 - 3 Furniture and fixtures 5 Other equipment 5 - 6 Buildings 30 Building improvements 15 Leasehold improvements Shorter of asset’s life The Company's property and equipment are summarized as follows (in thousands): December 31, 2017 2016 Land $ 1,251 $ 416 Depreciable assets: Software 74,048 58,381 Computer equipment 61,966 56,037 Other equipment 9,993 9,410 Furniture and fixtures 7,888 7,773 Building and improvements 3,319 2,351 Leasehold improvements 19,352 17,195 Total depreciable assets 176,566 151,147 Accumulated depreciation (120,629 ) (98,431 ) Property and equipment, net $ 57,188 $ 53,132

Commitments Commitments (Tables

Commitments Commitments (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Rental Payments Required Under Operating Leases	As of December 31, 2017 , future minimum rental payments required under operating leases that have initial or remaining non-cancellable terms in excess of one year are as follows (in thousands): Minimum Rental Payments Sublease Income Payments Net Minimum Rental Payments 2018 $ 15,431 $ (3,736 ) $ 11,695 2019 17,271 (3,736 ) 13,535 2020 17,056 (3,829 ) 13,227 2021 16,638 (4,015 ) 12,623 2022 14,364 (4,015 ) 10,349 Thereafter 61,287 (5,353 ) 55,934 $ 142,047 $ (24,684 ) $ 117,363 Included the minimum rental payments above are payments related to an office lease in Jacksonville, Florida for which the Company is contractually obligated; however, possession will revert to the Company in May 2019.
Unconditional Purchase Obligations	As of December 31, 2017 , the Company’s unconditional purchase obligations are as follows (in thousands): Payment Due 2018 $ 20,388 2019 18,263 2020 14,790 2021 15,695 2022 715 Thereafter — $ 69,851

Valuation Accounts (Tables)

Valuation Accounts (Tables)	12 Months Ended
	Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract]
Schedule of Valuation Accounts	The Company's valuation accounts are summarized as follows (in thousands): Additions Deductions Description Balance at beginning of year Charged to statement of comprehensive income Uncollectible accounts written off, net of recoveries or refunds to customers Balance at end of year Year Ended December 31, 2015: Allowance for doubtful accounts $ 1,705 $ 2,906 $ 2,796 $ 1,815 Refund liability 1,356 10,606 10,276 1,686 Total $ 3,061 $ 13,512 $ 13,072 $ 3,501 Year Ended December 31, 2016: Allowance for doubtful accounts $ 1,815 $ 1,640 $ 1,760 $ 1,695 Refund liability 1,686 11,337 11,118 1,905 Total $ 3,501 $ 12,977 $ 12,878 $ 3,600 Year Ended December 31, 2017: Allowance for doubtful accounts $ 1,695 $ 65 $ 306 $ 1,454 Refund liability 1,905 9,316 9,797 1,424 Total $ 3,600 $ 9,381 $ 10,103 $ 2,878

Stock-Based Compensation and 36

Stock-Based Compensation and Stockholders' Equity Stock-Based Compensation and Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Assumption Ranges Used in Calculating Fair Value of Options Granted	Below are the assumption ranges used in calculating the fair value of options granted during the following periods: Year Ended December 31, 2017 2016 2015 Risk-free interest rate 1.84 - 2.06 % 1.11 - 1.39 % 1.52 -1.60 % Dividend yield — % — % — % Expected life (in years) 4.99 - 5.07 4.97 - 5.19 4.96 - 4.99 Volatility 42 - 45 % 47 - 54 % 55 - 57 %
Summary of Option Activity	The following table summarizes option activity for all of the Company’s stock options: Shares Covered by Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) Balance, December 31, 2016 5,815,297 $ 16.06 Granted 1,211,925 $ 21.07 Exercised (1,173,494 ) $ 14.45 Forfeited (499,248 ) $ 19.27 Expired (88,447 ) $ 22.12 Balance, December 31, 2017 5,266,033 $ 17.20 5.81 $ 31,096 Exercisable at December 31, 2017 3,820,834 $ 16.17 4.73 $ 28,014
Price Ranges of Outstanding and Exercisable Options	Price ranges of outstanding and exercisable options as of December 31, 2017 are summarized below: Outstanding Options Exercisable Options Exercise Price Number of Options Weighted- Average Remaining Life (Years) Weighted- Average Exercise Price Number of Options Weighted- Average Exercise Price $3.55 - $9.97 1,059,960 2.15 $ 7.32 1,059,960 $ 7.32 $10.95 - $15.96 1,392,729 4.61 $ 14.22 1,359,968 $ 14.22 $16.97 - $19.24 1,129,540 7.54 $ 17.92 577,059 $ 18.06 $19.48 - $24.88 1,053,615 9.07 $ 21.20 214,811 $ 21.16 $26.69 - $36.45 630,189 6.07 $ 32.37 609,036 $ 32.36 5,266,033 3,820,834
Restricted Stock Activity	The following restricted stock activity occurred under the Company’s equity incentive plans during the year ended December 31, 2017 : Shares Weighted- Average Grant-Date Fair Value Restricted stock awards outstanding at December 31, 2016 1,552,723 $ 17.87 Granted 1,067,959 $ 20.46 Forfeited (205,889 ) $ 19.34 Lapse of restriction (released) (543,596 ) $ 18.95 Restricted stock awards outstanding at December 31, 2017 1,871,197 $ 18.87

Common Shares Reserved Common S

Common Shares Reserved Common Shares Reserved (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Reserved Shares of Common Stock for Future Issuance	The Company had reserved the following number of shares of common stock for future issuance: December 31, 2017 2016 2015 Outstanding stock options, performance share units and restricted stock units 5,955,837 6,239,847 5,674,405 Options available for future grants and other awards 3,567,989 5,513,027 3,738,466 Total common shares reserved 9,523,826 11,752,874 9,412,871

Income Taxes Income Taxes (Tabl

Income Taxes Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign	The domestic and foreign components of net income before income taxes for the years ended December 31, were as follows: 2017 2016 2015 Income before income taxes U.S. income $ 57,227 $ 15,510 $ 43,544 Foreign loss (1,673 ) (1,268 ) (1,843 ) Net income before income taxes $ 55,554 $ 14,242 $ 41,701
Provision (Benefit) for Income Taxes from Continuing Operations	The provision (benefit) for income taxes consisted of the following for the years ended December 31,: 2017 2016 2015 Current expense: Federal $ 1,112 $ 944 $ 1,000 State 1,721 1,044 835 Foreign 1,379 550 147 Total current tax expense 4,212 2,538 1,982 Deferred expense (benefit): Federal (6,302 ) 9,096 (49,301 ) State 4,700 (1,289 ) (820 ) Foreign (685 ) (93 ) (121 ) Total deferred tax (benefit) expense (2,287 ) 7,714 (50,242 ) Total income tax expense (benefit) $ 1,925 $ 10,252 $ (48,260 )
Components of Deferred Tax Assets and Liabilities	Significant components of the Company’s deferred tax assets and liabilities are as follows at December 31 (in thousands): 2017 2016 Noncurrent deferred tax assets: Deferred revenue $ 51,087 $ 76,887 NOLs 68,952 79,338 Stock compensation 6,548 9,509 Other deferred tax assets 15,986 20,243 142,573 185,977 Less: valuation allowance (30,364 ) (22,289 ) Total noncurrent deferred tax assets 112,209 163,688 Noncurrent deferred tax liabilities: Intangible basis 149,328 218,582 Discount on 2018 Notes 1,874 7,005 Other liabilities 11,816 18,004 Total noncurrent deferred tax liabilities 163,018 243,591 Net noncurrent deferred tax asset 233 232 Net noncurrent deferred tax liability (51,042 ) (80,135 ) Net deferred tax liability $ (50,809 ) $ (79,903 )
Schedule of Effective Income Tax Rate Reconciliation	The provision (benefit) for income taxes differs from the amount computed by applying the statutory U.S. federal income tax rates as a result of the following for the years ended December 31: 2017 2016 2015 U.S. statutory rate 35.0 % 35.0 % 35.0 % State income taxes (net of federal tax benefit) 3.0 2.6 2.8 Stock-based compensation 0.6 24.1 4.7 Change in valuation allowance 4.7 (30.2 ) (160.5 ) Foreign rate differential 1.3 5.2 2.0 Non-deductible compensation costs 1.3 5.2 2.0 Change in tax rates (1.0 ) 13.6 (0.6 ) Foreign currency translation adjustment (1.4 ) 15.3 — Unremitted foreign earnings and profits — (0.8 ) 0.7 Transaction costs 0.5 4.9 — Tax impacts of the Act (41.2 ) — — Other 0.7 (2.9 ) (1.9 ) Income tax expense (benefit) 3.5 % 72.0 % (115.8 ) %
Unrecognized Tax Benefits	Balance at December 31, 2014 $ 3,431 Additions in unrecognized tax benefits – prior year tax positions 73 Additions in unrecognized tax benefits – current year tax positions 300 Reductions in unrecognized tax benefits – current year tax positions (62 ) Lapse of statute of limitations (248 ) Balance at December 31, 2015 $ 3,494 Additions in unrecognized tax benefits – prior year tax positions 50 Additions in unrecognized tax benefits – current year tax positions 540 Lapse of statute of limitations (225 ) Balance at December 31, 2016 $ 3,859 Additions in unrecognized tax benefits – prior year tax positions 1,565 Additions in unrecognized tax benefits – current year tax positions 656 Reductions in unrecognized tax benefits – prior year tax positions (546 ) Lapse of statute of limitations (42 ) Balance at December 31, 2017 $ 5,492

Quarterly Results for 2017 an39

Quarterly Results for 2017 and 2016 (Unaudited) Quarterly Results for 2017 and 2016 (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results for 2017 and 2016 (Unaudited)	Quarter Ended (in thousands, except per share amounts) March 31, June 30, September 30, December 31, Total Year 2017 Revenue $185,118 $186,731 $188,567 $188,845 $ 749,261 Income from operations $20,542 (1) $22,998 $23,602 $21,473 (2) $ 88,615 Net income $6,518 (3) $8,046 (4) $8,300 $30,765 (5) $ 53,629 Basic EPS $0.13 $0.16 $0.17 $0.65 $ 1.10 Diluted EPS $0.13 $0.16 $0.16 $0.62 $ 1.06 2016 Revenue $144,798 $187,818 $190,686 $187,203 $ 710,505 Income from operations $6,912 (6) $7,578 $18,093 (7) $12,121 (8) $ 44,704 Net income (loss) $337 $(1,606) $3,346 $1,913 (9) $ 3,990 Basic EPS (loss) $0.01 $(0.03) $0.07 $0.04 $ 0.08 Diluted EPS (loss) $0.01 $(0.03) $0.07 $0.04 $ 0.08 (1) On January 31, 2017, the Company acquired 100% of the outstanding shares of DonWeb. The Company paid approximately $8.6 million at closing. The Company may pay the seller additional consideration of up to $2.0 million on January 31, 2021, present valued to $1.7 million as of the acquisition date, for total consideration of $10.3 million . Transaction costs associated with the acquisition were not significant. (2) On November 1, 2017, the Company acquired certain assets and liabilities of Acquisio, Inc., a provider of online advertising management. The Company paid approximately $8.7 million from acquisition closing through December 31, 2017. Additionally, the Company may pay additional consideration of up to approximately $0.6 million . Transaction costs associated with the acquisition were not significant. (3) The Consolidated Statement of Comprehensive Income includes an asset impairment charge of $0.1 million from writing down domain name inventory. (4) The Consolidated Statement of Comprehensive Income includes restructuring charges of $0.4 million associated with adjusting the estimated real estate taxes on a portion of our New York, New York office lease space that was previously vacated which was exited in December 2016 (5) The Consolidated Statement of Comprehensive Income includes an asset impairment charge of $0.2 million from abandoning certain technology and restructuring charges of approximately $0.5 million for an early lease termination payment related to the Herndon, VA facility. In the fourth quarter ended December 31, 2017, the Company recorded a tax benefit of $17.8 million primarily from adopting provisions of the Act. (6) On March 9, 2016, the Company acquired 100% of the outstanding shares of Yodle, Inc. and paid approximately $300.3 million adjusted for, among other things, Yodle's cash and outstanding debt and transaction related expenses. In addition to the consideration, the Company incurred approximately $3.9 million of acquisition-related transaction expenses which are reflected in the General and Administrative line item of the Consolidated Statement of Comprehensive Income. (7) The Consolidated Statement of Comprehensive Income includes an asset impairment charge of $2.0 million from writing down domain name inventory. (8) The Consolidated Statement of Comprehensive Income includes an asset impairment charge of $7.1 million for leasehold improvements that were abandoned as part of exiting the operating lease acquired in the March 2016 Yodle acquisition. In addition, there is $1.6 million of restructuring charges that were recorded during the fourth quarter ended December 31, 2016, which primarily consists of the estimated expense for lease obligations offset by sublease income expected. (9) Included in the fourth quarter ended December 31, 2016 is the reversal of $2.4 million respectively, of valuation allowance for certain U.S. federal and state deferred tax assets, which contributed to the Company recording income tax expense of $2.3 million .

Accumulated Other Comprehensi40

Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Accumulated Other Comprehensive (Loss) Income	Accumulated Other Comprehensive Loss The components of accumulated other comprehensive loss are as follows (in thousands): December 31, 2017 December 31, 2016 Foreign currency translation adjustments $ (4,503 ) $ (4,019 ) Unrealized gains on investments — (1 ) Total accumulated other comprehensive loss $ (4,503 ) $ (4,020 )

The Company and Summary of Si41

The Company and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)Segment	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Business Acquisition [Line Items]
Number of segments | Segment	1
Foreign currency transaction loss	$ 0.1	$ 0.3	$ 0.4
Restricted cash short term	0.3	0.5
Restricted cash long term	$ 4.6	4.9
Threshold period past due for write-off of trade accounts receivable	60 days
Advertising expense	$ 30.6	$ 46.4	$ 50.1
Four Institutions | Credit Concentration Risk | Cash and Cash Equivalents
Business Acquisition [Line Items]
Concentrations of credit risk, percentage of total cash and cash equivalents	97.00%

The Company and Summary of Si42

The Company and Summary of Significant Accounting Policies - Assets Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2017
Computer equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	3 years
Computer equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years
Software | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	2 years
Software | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	3 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years
Other equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years
Other equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	6 years
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	30 years
Building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	15 years

New Accounting Standards Schedu

New Accounting Standards Schedule of Changes Due to New Accounting Standards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 01, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment	$ 1,800
Cumulative effect adjustment	28,009
Valuation allowance	30,400		$ 68,800
Increase (decrease) in net cash provided by operating activities	149,820	$ 132,865	152,433
State
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance	19,000
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance				$ 1,700
Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) in net cash provided by operating activities		$ 5,000	$ (300)
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment	$ 28,009
Retained Earnings | Accounting Standards Update 2016-09 | Federal
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment				27,000
Retained Earnings | Accounting Standards Update 2016-09 | State
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment				$ 2,700

Net Earnings Per Common Share -

Net Earnings Per Common Share - Additional Information (Detail) - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Dilutive share-based awards (in shares)	2.4	3.4	1.6
Conversion price of convertible debt (in dollars per share)	$ 35	$ 35	$ 35

Net Earnings Per Common Share45

Net Earnings Per Common Share - Computation of Basic And Diluted Net Loss Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income									$ 53,629	$ 3,990	$ 89,961
Basic weighted average common shares (in shares)									48,629	49,262	50,243
Diluted effect of stock options (in shares)									1,399	1,265	1,757
Diluted effect of restricted shares (in shares)									612	352	426
Dilutive effect of performance shares (in shares)									14	1	16
Dilutive effect of the assumed conversion of the 2018 Senior Convertible Notes (in shares)									0	0	0
Diluted weighted average common shares (in shares)									50,654	50,880	52,442
Basic earnings per share:
Net income per common share, basic (in dollars per share)	$ 0.65	$ 0.17	$ 0.16	$ 0.13	$ 0.04	$ 0.07	$ (0.03)	$ 0.01	$ 1.10	$ 0.08	$ 1.79
Diluted earnings per share:
Net income per common share, diluted (in dollars per share)	$ 0.62	$ 0.16	$ 0.16	$ 0.13	$ 0.04	$ 0.07	$ (0.03)	$ 0.01	$ 1.06	$ 0.08	$ 1.72

Long-term Debt - Additional Inf

Long-term Debt - Additional Information (Detail)	Mar. 09, 2016USD ($)	Feb. 11, 2016USD ($)	Aug. 31, 2017	Aug. 31, 2013USD ($)day$ / shares	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Debt Instrument
Aggregate principal amount of debt				$ 258,800,000
Carrying amount of convertible debt, liability component				204,400,000
Carrying amount of convertible debt, equity component				$ 47,800,000
Unamortized debt discount						$ (11,514,000)
Excess of principal amount of the liability component over carrying amount, expected life				5 years
Debt issuance costs						1,935,000	$ 5,700,000	$ 0
Line of credit remaining borrowing capacity						248,100,000
Interest expense from amortizing debt issuance costs and discounts						14,200,000	12,800,000	$ 11,400,000
Revolving Credit Facility
Debt Instrument
Line of credit maximum borrowing capacity					$ 110,000,000
Term Loan
Debt Instrument
Aggregate principal amount of debt		$ 390,000,000
Balance of debt extinguished		$ 190,000,000
Debt instrument, term		5 years
Additional debt issued		$ 200,000,000			$ 50,000,000
Proceeds from issuance of debt	$ 115,000,000
Commitment fee			0.45%
Fronting fee			0.125%
Term Loan | London Interbank Offered Rate (LIBOR)
Debt Instrument
Basis spread on variable interest rate		3.00%	2.50%
Term Loan | Prime Rate
Debt Instrument
Basis spread on variable interest rate		2.00%
Term Loan | Revolving Credit Facility
Debt Instrument
Debt instrument, term		5 years
Line of credit maximum borrowing capacity		$ 150,000,000
Long-term Debt
Debt Instrument
Unamortized debt discount						(11,135,000)
Convertible Debt
Debt Instrument
Long-term debt						$ 251,036,000	239,196,000
Convertible Debt | Senior Convertible Notes maturing 2018
Debt Instrument
Long-term debt, stated interest rate				1.00%		1.00%
Aggregate principal amount of debt				$ 258,800,000
Initial effective conversion price, per share of common stock | $ / shares				$ 35
Proceeds from issuance of notes, net of original issuance discounts and debt issuance costs				$ 252,300,000
Long-term debt						$ 248,100,000	239,200,000
Carrying amount of convertible debt, liability component						251,000,000	239,200,000
Carrying amount of convertible debt, equity component						47,800,000	47,800,000
Unamortized debt discount						$ (7,714,000)
Excess of principal amount of the liability component over carrying amount, expected life						7 months 15 days
Convertible Debt | Senior Convertible Notes maturing 2018 | On or after August 20, 2016 | Parent Company
Debt Instrument
Redemption or conversion price of notes, percentage of principal amount				100.00%
Convertible Debt | Senior Convertible Notes maturing 2018 | On or after August 20, 2016 | Parent Company | Minimum
Debt Instrument
Redemption or conversion of notes, stock price trigger, sale price of common stock as a percentage of applicable conversion price				130.00%
Convertible Debt | Senior Convertible Notes maturing 2018 | On or after August 20, 2016 | Debt Holders | Minimum
Debt Instrument
Redemption or conversion of notes, stock price trigger, sale price of common stock as a percentage of applicable conversion price				130.00%
Convertible Debt | Senior Convertible Notes maturing 2018 | Prior to May 15, 2018 | Debt Holders
Debt Instrument
Conversion of notes, basis period, number of days				5 days
Conversion of notes, measurement period, number of days | day				5
Convertible Debt | Senior Convertible Notes maturing 2018 | Prior to May 15, 2018 | Debt Holders | Maximum
Debt Instrument
Redemption or conversion of notes, stock price trigger, sale price of common stock as a percentage of applicable conversion price				98.00%
Line of Credit | Revolving Credit Facility
Debt Instrument
Balance of debt extinguished				$ 43,000,000
Line of Credit | Revolving Credit Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument
Basis spread on variable interest rate						2.50%
Secured Debt | First Lien Term Loan due 2017
Debt Instrument
Balance of debt extinguished				$ 208,000,000
Long-term debt						$ 385,934,000	$ 377,851,000
Unamortized debt discount						$ (3,800,000)
Secured Debt | First Lien Term Loan due 2017 | London Interbank Offered Rate (LIBOR)
Debt Instrument
Basis spread on variable interest rate						2.50%

Long-term Debt - Outstanding Lo

Long-term Debt - Outstanding Long Term Debt and Interest Rates (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Aug. 31, 2013
Debt Instrument
Unamortized debt discount	$ 11,514
Total Outstanding Debt, less unamortized discount of $11,514 at December 31, 2017	646,970	$ 664,141
Less: Current Portion of Long-Term Debt, less unamortized discount of $379 at December 31, 2017	(16,612)	(16,847)
Long-Term Portion, less unamortized discount of $11,135 at December 31, 2017	630,358	647,294
Convertible Debt
Debt Instrument
Long-term debt	251,036	239,196
Long-term Debt
Debt Instrument
Unamortized debt discount	11,135
Revolving Credit Facility
Debt Instrument
Revolving Credit Facility maturing 2021, 3.93%, based on LIBOR plus 2.50%	$ 10,000	47,094
First Lien Term Loan due 2017 | Secured Debt
Debt Instrument
Revolving credit facility, interest rate	3.98%
Unamortized debt discount	$ 3,800
Long-term debt, interest rate	4.33%
Long-term debt	$ 385,934	377,851
Senior Convertible Notes maturing 2018 | Convertible Debt
Debt Instrument
Unamortized debt discount	$ 7,714
Long-term debt, interest rate	5.88%
Long-term debt, stated interest rate	1.00%		1.00%
Long-term debt	$ 248,100	$ 239,200
London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Line of Credit
Debt Instrument
Revolving credit facility, interest rate	3.93%
Basis spread on variable interest rate	2.50%
London Interbank Offered Rate (LIBOR) | First Lien Term Loan due 2017 | Secured Debt
Debt Instrument
Basis spread on variable interest rate	2.50%
Short-term Debt
Debt Instrument
Unamortized debt discount	$ 379

Long-term Debt - Principal Paym

Long-term Debt - Principal Payments Due for All Long Term Debt (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Debt Instrument
2,018	$ 16,990
2,019	41,370
2,020	44,128
2,021	555,996
Total principal payments	658,484
Convertible Debt | Senior Convertible Notes maturing 2018
Debt Instrument
2,021	$ 248,100

Business Combinations - Narrati

Business Combinations - Narrative (Detail) - USD ($) $ in Thousands

Nov. 30, 2017

Nov. 01, 2017

Jan. 31, 2017

May 31, 2016

Mar. 09, 2016

Dec. 31, 2017

Sep. 30, 2016

Dec. 31, 2016

Dec. 31, 2017

Dec. 31, 2017

Dec. 31, 2016

Dec. 31, 2015

Business Acquisition [Line Items]

Total acquisition consideration

$ 20,433

$ 0

$ 0

Deferred consideration from acquisitions

$ 22,466

$ 20,244

$ 22,466

22,466

20,244

Common stock options issued for acquisitions

$ 0

2,340

$ 0

Adjustment to intangible assets

$ 2,100

Amortization period of the acquired intangible assets

5 years 1 month 13 days

Acquisio Inc.

Business Acquisition [Line Items]

Payment for acquisition

8,700

Contingent consideration

$ 600

Total purchase price consideration

$ 9,281

DonWeb

Business Acquisition [Line Items]

Payment for acquisition

$ 8,600

Percentage of equity interests acquired

100.00%

Contingent consideration maximum consideration

$ 2,000

Liability incurred

1,700

Total acquisition consideration

10,300

Liabilities arising from pre-acquisition matters

4,000

Total purchase price consideration

10,348

10,348

10,348

$ 10,348

Yodle, Inc.

Business Acquisition [Line Items]

Payment for acquisition

$ 300,300

Percentage of equity interests acquired

100.00%

Deferred consideration from acquisitions

$ 18,900

Deferred consideration, non-current

22,000

Common stock options issued for acquisitions

2,300

Total purchase price consideration

341,300

$ 341,271

341,271

$ 341,271

Acquisition-related transaction expenses

3,900

$ 3,900

Fair value of acquired receivables

$ 4,800

Brokerage Leader, Inc.(TORCHx)

Business Acquisition [Line Items]

Payment for acquisition

$ 1,500

$ 3,000

Total acquisition consideration

4,400

Total purchase price consideration

$ 4,391

Customer relationships

Business Acquisition [Line Items]

Amortization period of the acquired intangible assets

5 years 6 months 26 days

6 years 6 months

Customer relationships | Acquisio Inc.

Business Acquisition [Line Items]

Weighted average useful life

4 years

Customer relationships | DonWeb

Business Acquisition [Line Items]

Weighted average useful life

3 years

Adjustment to intangible assets

(2,420)

Customer relationships | Yodle, Inc.

Business Acquisition [Line Items]

Amortization period of the acquired intangible assets

6 years 4 months

Customer relationships | Brokerage Leader, Inc.(TORCHx)

Business Acquisition [Line Items]

Weighted average useful life

4 years

Developed Technology

Business Acquisition [Line Items]

Amortization period of the acquired intangible assets

4 years 2 months 16 days

4 years 9 months

Developed Technology | Acquisio Inc.

Business Acquisition [Line Items]

Weighted average useful life

10 years

Developed Technology | Yodle, Inc.

Business Acquisition [Line Items]

Amortization period of the acquired intangible assets

6 years

Developed Technology | Brokerage Leader, Inc.(TORCHx)

Business Acquisition [Line Items]

Weighted average useful life

7 years

Non-competes

Business Acquisition [Line Items]

Amortization period of the acquired intangible assets

1 year

1 year 5 months

Non-competes | DonWeb

Business Acquisition [Line Items]

Weighted average useful life

4 years

Adjustment to intangible assets

$ 236

Post-Acquisition Business Performance and Employment | DonWeb

Business Acquisition [Line Items]

Contingent consideration maximum consideration

$ 3,000

Contingent consideration earn out period

4 years

Business Combinations - Allocat

Business Combinations - Allocated Purchase Price (Details) - USD ($) $ in Thousands	10 Months Ended	11 Months Ended
	Dec. 31, 2016	Dec. 31, 2017	Nov. 01, 2017	Jan. 31, 2017	May 31, 2016	Mar. 09, 2016	Dec. 31, 2015
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill	$ 871,751	$ 885,662					$ 639,145
Adjustments
Adjustment to intangible assets	$ 2,100
DonWeb
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Tangible current assets		1,071		$ 1,145
Property plant and equipment		2,344		2,392
Other non current assets		2,811		2,849
Goodwill		10,568		9,519
Current liabilities		(1,738)		(837)
Deferred revenue		(1,584)		(2,860)
Deferred tax liability		(1,200)
Other long term liabilities		(6,070)		(6,000)
Purchase price consideration		10,348		10,348
Adjustments
Tangible current assets		(74)
Property plant and equipment		(48)
Other non current assets		(38)
Goodwill		1,049
Current liabilities		(901)
Deferred revenue		1,276
Other long term liabilities		(70)
Purchase price consideration		0
Acquisio Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Tangible current assets			$ 130
Property plant and equipment			376
Goodwill			4,264
Current liabilities			(274)
Deferred revenue			(93)
Other long term liabilities			(129)
Purchase price consideration			9,281
Brokerage Leader, Inc.(TORCHx)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Tangible current assets					$ 17
Goodwill					2,266
Deferred revenue					(42)
Purchase price consideration					4,391
Yodle, Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Tangible current assets		7,455
Property plant and equipment		18,286
Other non current assets		277
Goodwill		231,612
Current liabilities		(22,609)
Deferred revenue		(7,791)
Deferred tax liability		(33,607)
Other long term liabilities		(411)
Purchase price consideration		341,271				$ 341,300
Non-competes | DonWeb
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Finite lived intangible assets		236		0
Adjustments
Adjustment to intangible assets		236
Developed Technology | Acquisio Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Finite lived intangible assets			2,698
Developed Technology | Brokerage Leader, Inc.(TORCHx)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets other than goodwill					1,790
Developed Technology | Yodle, Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets other than goodwill		85,990
Customer relationships | DonWeb
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Finite lived intangible assets		1,720		4,140
Adjustments
Adjustment to intangible assets		(2,420)
Customer relationships | Acquisio Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Finite lived intangible assets			1,908
Customer relationships | Brokerage Leader, Inc.(TORCHx)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets other than goodwill					$ 360
Customer relationships | Yodle, Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets other than goodwill		34,079
Domain/Trade names | DonWeb
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Indefinite lived intangible assets		990		$ 0
Adjustments
Adjustment to intangible assets		990
Domain/Trade names | Acquisio Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Indefinite lived intangible assets			$ 401
Domain/Trade names | Yodle, Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets other than goodwill		$ 27,990

Business Combinations - Proform

Business Combinations - Proforma Revenue and Net Loss (Details) - Yodle, Inc. - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenue	$ 750,474	$ 740,742
Net loss	$ (4,547)	$ 54,159
Basic net loss per share (in dollars per share)	$ (0.09)	$ 1.08
Diluted net loss per share (in dollars per share)	$ (0.09)	$ 1.03
Basic weighted-average common shares outstanding (shares)	49,262	50,243
Diluted weighted-average common shares outstanding (shares)	49,262	52,488

Goodwill and Intangible Asset52

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Amortization period of the acquired intangible assets	5 years 1 month 13 days
Net deferred tax liability	$ 50,809	$ 79,903
Amortization expense	$ 49,300	56,800	$ 39,300
Other Intangible Assets
Goodwill [Line Items]
Payments to acquire registrar credentials		1,600
Registrar credentials		$ 2,600
Amortization period of the acquired intangible assets		24 months
Net deferred tax liability		$ 1,000

Goodwill and Intangible Asset53

Goodwill and Intangible Assets - Summary of Changes in Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Goodwill balance at beginning of period, gross	$ 988,000	$ 974,045	$ 741,439
Accumulated impaired goodwill at beginning of period	(102,300)	(102,294)	$ (102,294)
Goodwill balance at beginning of period, net	871,751	639,145
Foreign currency translation adjustments	(921)	(1,272)
Goodwill balance at end of period, net	885,662	871,751
Yodle, Inc.
Goodwill [Roll Forward]
Goodwill, acquired during period	0	231,612
Goodwill balance at end of period, net	231,612
Brokerage Leader, Inc.(TORCHx)
Goodwill [Roll Forward]
Goodwill, acquired during period	0	2,266
DonWeb
Goodwill [Roll Forward]
Goodwill, acquired during period	10,568	0
Goodwill balance at end of period, net	10,568
Acquisio Inc.
Goodwill [Roll Forward]
Goodwill, acquired during period	$ 4,264	$ 0

Goodwill and Intangible Asset54

Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Intangible Assets by Major Class
Finite-lived intangible assets	$ 780,419	$ 771,981
Accumulated amortization	(408,848)	(358,854)
Indefinite-lived intangible assets, net	371,571	413,127
Finite lived intangible assets, net	$ 371,571	413,127
Definite-lived intangible assets, weighted average amortization period	5 years 1 month 13 days
Loss on foreign currency translation	$ 200	1,000
Domain/Trade names
Intangible Assets by Major Class
Indefinite-lived intangible assets	161,251	159,805
Indefinite-lived intangible assets, net	161,251	159,805
Customer relationships
Intangible Assets by Major Class
Finite-lived intangible assets	327,176	324,327
Accumulated amortization	(185,353)	(157,998)
Finite lived intangible assets, net	$ 141,823	$ 166,329
Definite-lived intangible assets, weighted average amortization period	5 years 6 months 26 days	6 years 6 months
Developed Technology
Intangible Assets by Major Class
Finite-lived intangible assets	$ 283,319	$ 280,455
Accumulated amortization	(215,545)	(195,695)
Finite lived intangible assets, net	$ 67,774	$ 84,760
Definite-lived intangible assets, weighted average amortization period	4 years 2 months 16 days	4 years 9 months
Other
Intangible Assets by Major Class
Finite-lived intangible assets	$ 8,673	$ 7,394
Accumulated amortization	(7,950)	(5,161)
Finite lived intangible assets, net	$ 723	$ 2,233
Definite-lived intangible assets, weighted average amortization period	1 year	1 year 5 months

Goodwill and Intangible Asset55

Goodwill and Intangible Assets - Amortization Expense for Next Five Years (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,018	$ 45,677
2,019	41,934
2,020	39,277
2,021	38,344
2,022	26,703
Thereafter	18,385
Total	$ 210,320

Property and Equipment (Detail)

Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Land	$ 1,251	$ 416
Depreciable assets:
Software	74,048	58,381
Computer equipment	61,966	56,037
Other equipment	9,993	9,410
Furniture and fixtures	7,888	7,773
Building and improvements	3,319	2,351
Leasehold improvements	19,352	17,195
Total depreciable assets	176,566	151,147
Accumulated depreciation	(120,629)	(98,431)
Property and equipment, net	$ 57,188	$ 53,132

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 22.2	$ 21.2	$ 17.1
Unamortized computer software costs	25	21.1	16.9
Software
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 11.5	$ 9.8	$ 8.5

Commitments - Additional Inform

Commitments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Rental expense	$ 16.7	$ 16	$ 7.5
Accrued rent expense	(1.9)	(1.8)
Letters of credit	6.8	7.3
Letters of credit drawn against revolving credit facility	$ 1.9	$ 1.9

Commitments - Future Minimum Re

Commitments - Future Minimum Rental Payments Under Operating Leases (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Minimum Rental Payments
2,018	$ 15,431
2,019	17,271
2,020	17,056
2,021	16,638
2,022	14,364
Thereafter	61,287
Minimum Rental Payments	142,047
Sublease Income Payments
2,018	(3,736)
2,019	(3,736)
2,020	(3,829)
2,021	(4,015)
2,022	(4,015)
Thereafter	(5,353)
Sublease Income Payments	(24,684)
Net Minimum Rental Payments
2,018	11,695
2,019	13,535
2,020	13,227
2,021	12,623
2,022	10,349
Thereafter	55,934
Net Minimum Rental Payments	$ 117,363

Commitments - Unconditional Pur

Commitments - Unconditional Purchase Obligations (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,018	$ 20,388
2,019	18,263
2,020	14,790
2,021	15,695
2,022	715
Thereafter	0
Payment Due, Total	$ 69,851

Valuation Accounts (Detail)

Valuation Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	$ 3,600	$ 3,501	$ 3,061
Charged to statement of comprehensive income	9,381	12,977	13,512
Uncollectible accounts written off, net of recoveries or refunds to customers	10,103	12,878	13,072
Balance at end of year	2,878	3,600	3,501
Allowance for doubtful accounts
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	1,695	1,815	1,705
Charged to statement of comprehensive income	65	1,640	2,906
Uncollectible accounts written off, net of recoveries or refunds to customers	306	1,760	2,796
Balance at end of year	1,454	1,695	1,815
Refund liability
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	1,905	1,686	1,356
Charged to statement of comprehensive income	9,316	11,337	10,606
Uncollectible accounts written off, net of recoveries or refunds to customers	9,797	11,118	10,276
Balance at end of year	$ 1,424	$ 1,905	$ 1,686

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - Convertible Debt - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of term loan	$ 255,300
Long-term debt	251,036	$ 239,196
Senior Convertible Notes maturing 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of term loan		248,600
Long-term debt	$ 248,100	$ 239,200

Stock-Based Compensation and 63

Stock-Based Compensation and Stockholders' Equity - Additional Information (Detail) - USD ($)	Mar. 09, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Oct. 31, 2016	Nov. 05, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available for future grants (in shares)		3,567,989	5,513,027	3,738,466
Value of shares of stock issued in acquisition		$ 0	$ 2,340,000	$ 0
Stock-based compensation costs		$ 23,201,000	20,714,000	20,064,000
Exercised (in shares)		1,173,494
Intrinsic value of option exercised		$ 9,400,000	5,400,000	7,400,000
Fair value of shares vested		$ 9,100,000	$ 10,800,000	$ 11,300,000
Weighted-average grant-date fair value of options granted (in dollars per share)		$ 8.64	$ 8.01	$ 9.36
Authorized share repurchase program					$ 100,000,000	$ 100,000,000
Available for repurchase under program, amount		$ 33,800,000
Common stock purchases under repurchase plan		$ 76,278,000	$ 28,565,000	$ 50,617,000
Vesting tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage		33.33%
Vesting tranche two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage		33.33%
Vesting tranche three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage		33.33%
Yodle, Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of shares of stock issued in acquisition	$ 2,300,000
Incentive Stock Options and Non-statutory Stock Options | Equity Incentive Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Incentive Stock Options and Non-statutory Stock Options | Equity Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Shares granted (in shares)		500,000
Unrecognized compensation, recognition period		1 month 15 days
Stock-based compensation costs		$ 3,500,000	1,200,000
Unrecognized compensation costs		$ 500,000
Percent of target shares granted range		71.00%
Issuance of restricted stock (in shares)		100,000
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of target shares granted range		0.00%
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of target shares granted range		200.00%
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)		1,067,959
Unrecognized compensation, recognition period		2 years 4 months 10 days
Stock-based compensation costs		$ 11,900,000	$ 9,900,000	$ 8,700,000
Unrecognized compensation costs		$ 20,400,000
Issuance of restricted stock (in shares)		900,000	1,200,000	500,000
Shares forfeited in lieu of income tax withholding requirements (in shares)		200,000	200,000	100,000
Shares forfeited in lieu of income tax withholding requirements, value		$ 4,600,000	$ 4,300,000	$ 2,400,000
Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		1 year
Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
Restricted Stock | Yodle, Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of stock issued in acquisition (in shares)	1,300,000
Equity interests converted	$ 8,300,000
Value of shares of stock issued in acquisition	$ 2,300,000
Unrecognized compensation, recognition period	2 years
Restricted Stock | Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
Award maximum term		10 years
Award vesting percentage		25.00%
Restricted Stock | Yodle Equity Grant One | Yodle, Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Shares granted (in shares)	300,000
Restricted Stock | Yodle Equity Grant Two | Yodle, Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Shares granted (in shares)	300,000
Restricted Stock | Yodle Equity Grant Two | Yodle, Inc. | Vesting tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Award vesting percentage	25.00%
Restricted Stock | Yodle Equity Grant Two | Yodle, Inc. | Vesting tranche two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Award vesting percentage	75.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
Award maximum term		10 years
Unrecognized compensation, recognition period		2 years 7 months 17 days
Stock-based compensation costs		$ 7,800,000	$ 9,600,000	$ 10,400,000
Unrecognized compensation costs		$ 10,500,000
Exercised (in shares)		1,200,000	700,000	700,000

Stock-Based Compensation and 64

Stock-Based Compensation and Stockholders' Equity - Assumption Ranges Used in Calculating Fair Value of Options Granted (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate, minimum	1.84%	1.11%	1.52%
Risk-free interest rate, maximum	2.06%	1.39%	1.60%
Dividend yield	0.00%	0.00%	0.00%
Volatility, minimum	42.00%	47.00%	55.00%
Volatility, maximum	45.00%	54.00%	57.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	4 years 11 months 25 days	4 years 11 months 20 days	4 years 11 months 15 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	5 years 26 days	5 years 2 months 7 days	4 years 11 months 25 days

Stock-Based Compensation and 65

Stock-Based Compensation and Stockholders' Equity - Summary of Option Activity (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)$ / sharesshares
Shares Covered by Options
Beginning balance (in shares) | shares	5,815,297
Granted (in shares) | shares	1,211,925
Exercised (in shares) | shares	(1,173,494)
Forfeited (in shares) | shares	(499,248)
Expired (in shares) | shares	(88,447)
Ending balance (in shares) | shares	5,266,033
Exercisable at end of period (in shares) | shares	3,820,834
Weighted Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 16.06
Granted (in dollars per share) | $ / shares	21.07
Exercised (in dollars per share) | $ / shares	14.45
Forfeited (in dollars per share) | $ / shares	19.27
Expired (in dollars per share) | $ / shares	22.12
Ending balance (in dollars per share) | $ / shares	17.20
Exercisable at end of period (in dollars per share) | $ / shares	$ 16.17
Weighted- Average Remaining Contractual Term (in years)	5 years 9 months 22 days
Weighted- Average Remaining Contractual Term, Exercisable (in years)	4 years 8 months 23 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value (in thousands) | $	$ 31,096
Aggregate Intrinsic Value, Exercisable (in thousands) | $	$ 28,014

Stock-Based Compensation and 66

Stock-Based Compensation and Stockholders' Equity - Price Ranges of Outstanding and Exercisable Options (Detail)	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Outstanding Options
Number of Options (in shares) | shares	5,266,033
Exercisable Options
Number of Options (in shares) | shares	3,820,834
$3.55 - $9.97
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Exercise price, lower range (in dollars per share)	$ 3.55
Exercise price, upper range (in dollars per share)	$ 9.97
Outstanding Options
Number of Options (in shares) | shares	1,059,960
Weighted- Average Remaining Life (Years)	2 years 1 month 24 days
Weighted Average Exercise Price (in dollars per share)	$ 7.32
Exercisable Options
Number of Options (in shares) | shares	1,059,960
Weighted Average Exercise Price (in dollars per share)	$ 7.32
$10.95 - $15.96
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Exercise price, lower range (in dollars per share)	10.95
Exercise price, upper range (in dollars per share)	$ 15.96
Outstanding Options
Number of Options (in shares) | shares	1,392,729
Weighted- Average Remaining Life (Years)	4 years 7 months 10 days
Weighted Average Exercise Price (in dollars per share)	$ 14.22
Exercisable Options
Number of Options (in shares) | shares	1,359,968
Weighted Average Exercise Price (in dollars per share)	$ 14.22
$16.97 - $19.24
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Exercise price, lower range (in dollars per share)	16.97
Exercise price, upper range (in dollars per share)	$ 19.24
Outstanding Options
Number of Options (in shares) | shares	1,129,540
Weighted- Average Remaining Life (Years)	7 years 6 months 15 days
Weighted Average Exercise Price (in dollars per share)	$ 17.92
Exercisable Options
Number of Options (in shares) | shares	577,059
Weighted Average Exercise Price (in dollars per share)	$ 18.06
$19.48 - $24.88
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Exercise price, lower range (in dollars per share)	19.48
Exercise price, upper range (in dollars per share)	$ 24.88
Outstanding Options
Number of Options (in shares) | shares	1,053,615
Weighted- Average Remaining Life (Years)	9 years 26 days
Weighted Average Exercise Price (in dollars per share)	$ 21.20
Exercisable Options
Number of Options (in shares) | shares	214,811
Weighted Average Exercise Price (in dollars per share)	$ 21.16
$26.69 - $36.45
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Exercise price, lower range (in dollars per share)	26.69
Exercise price, upper range (in dollars per share)	$ 36.45
Outstanding Options
Number of Options (in shares) | shares	630,189
Weighted- Average Remaining Life (Years)	6 years 26 days
Weighted Average Exercise Price (in dollars per share)	$ 32.37
Exercisable Options
Number of Options (in shares) | shares	609,036
Weighted Average Exercise Price (in dollars per share)	$ 32.36

Stock-Based Compensation and 67

Stock-Based Compensation and Stockholders' Equity - Restricted Stock Activity (Detail) - Restricted Stock	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Shares
Beginning balance (in shares) | shares	1,552,723
Granted (in shares) | shares	1,067,959
Forfeitures (in shares) | shares	(205,889)
Lapse of restriction (released) (in shares) | shares	(543,596)
Ending balance (in shares) | shares	1,871,197
Weighted- Average Grant-Date Fair Value
Ending balance (in dollars per share) | $ / shares	$ 17.87
Granted (in dollars per share) | $ / shares	20.46
Forfeitures (in dollars per share) | $ / shares	19.34
Lapse of restriction (released) (in dollars per share) | $ / shares	18.95
Ending balance (in dollars per share) | $ / shares	$ 18.87

Common Shares Reserved - Reserv

Common Shares Reserved - Reserved Shares of Common Stock for Future Issuance (Detail) - shares	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding stock options, performance share units and restricted stock units (in shares)	5,266,033	5,815,297
Options available for future grants and other awards (in shares)	3,567,989	5,513,027	3,738,466
Total common shares reserved (in shares)	9,523,826	11,752,874	9,412,871
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding stock options, performance share units and restricted stock units (in shares)	5,955,837	6,239,847	5,674,405

Income Taxes - Income before In

Income Taxes - Income before Income Tax, Domestic and Foreign (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
U.S. income	$ 57,227	$ 15,510	$ 43,544
Foreign loss	(1,673)	(1,268)	(1,843)
Net income before income taxes	$ 55,554	$ 14,242	$ 41,701

Income Taxes - Provision or Ben

Income Taxes - Provision or Benefit for Income Taxes from Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current expense:
Federal			$ 1,112	$ 944	$ 1,000
State			1,721	1,044	835
Foreign			1,379	550	147
Total current tax expense			4,212	2,538	1,982
Deferred expense (benefit):
Federal			(6,302)	9,096	(49,301)
State			4,700	(1,289)	(820)
Foreign			(685)	(93)	(121)
Total deferred tax (benefit) expense			(2,287)	7,714	(50,242)
Total income tax expense (benefit)	$ (17,800)	$ 2,300	$ 1,925	$ 10,252	$ (48,260)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 01, 2017
Income Taxes
Net operating loss carry forwards available during carry forward period		$ 182,200,000	$ 159,800,000	$ 182,200,000	$ 159,800,000
Income tax benefit as result of Tax Cut and Jobs Act of 2017		22,900,000		22,900,000
Benefit resulting from remeasurment of deferred tax assets and liabilities				26,100,000
Income tax benefit from reversal of liability associate with prior year earnings as result of the Tax Cuts and Jobs Act of 2017		1,900,000
Income tax expense on repatriation of foreign earnings as result of the Tax Cuts and Jobs Act of 2017		800,000
Cumulative foreign earnings		5,100,000
Income tax expense related to write off of certain deferred tax assets as result of the Tax Cuts and Jobs Act of 2017		500,000
Decrease in deferred tax liability		(112,209,000)	(163,688,000)	(112,209,000)	(163,688,000)
Noncurrent deferred income tax assets		233,000	232,000	233,000	232,000
Valuation allowance	$ 68,800,000	30,400,000		30,400,000		$ 68,800,000
Increase (decrease) in deferred tax valuation allowance	$ 1,900,000			8,100,000	(4,300,000)	(66,900,000)
Impact of foreign currency translation adjustment on AOCI			0		0
Unrecognized tax benefits, which could favorably affect effective rate		4,500,000	3,200,000	4,500,000	3,200,000
Net expense/(benefit) related to interest penalties				2,500,000	0	$ (200,000)
Unrecognized tax benefits, accrued interest and penalties accrued		2,600,000	100,000	2,600,000	100,000
Research And Development Tax Credit
Income Taxes
Foreign Tax Credit carry forward		500,000	500,000	500,000	500,000
Alternative Minimum Tax
Income Taxes
Foreign Tax Credit carry forward		5,200,000	4,100,000	5,200,000	4,100,000
Foreign Tax Credit
Income Taxes
Valuation allowance		1,200,000		1,200,000
DonWeb
Income Taxes
Deferred tax liability		1,200,000		1,200,000
State and Local Jurisdiction
Income Taxes
Net operating loss carry forwards		378,600,000	324,600,000	378,600,000	324,600,000
Increase in deferred tax valuation allowance as result of the Tax Cuts and Jobs Act				3,800,000
Valuation allowance		19,000,000		19,000,000
Increase (decrease) in deferred tax valuation allowance				6,600,000	(900,000)
Increase in valuation allowance due to current year book losses					1,500,000
Decrease in valuation allowance due to change in amount estimated to be used			2,400,000		2,400,000
UNITED KINGDOM
Income Taxes
Net operating loss carry forwards		57,500,000	51,500,000	57,500,000	51,500,000
Foreign Tax Authority
Income Taxes
Foreign Tax Credit carry forward		1,200,000	$ 1,200,000	1,200,000	1,200,000
Valuation allowance		10,200,000		10,200,000
Increase (decrease) in deferred tax valuation allowance				1,500,000	(3,400,000)
Increase in valuation allowance due to current year book losses					600,000
Increase (decrease) in valuation allowance due to change in tax rate					(1,800,000)
Decrease in valuation allowance due to foreign currency adjustment					$ 2,200,000
Accounting Standards Update 2016-09
Income Taxes
Decrease in deferred tax liability		$ (29,100,000)		$ (29,100,000)
Valuation allowance							$ 1,700,000

Income Taxes - Components of De

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Noncurrent deferred tax assets:
Deferred revenue	$ 51,087	$ 76,887
NOLs	68,952	79,338
Stock compensation	6,548	9,509
Other deferred tax assets	15,986	20,243
Gross noncurrent deferred tax assets	142,573	185,977
Valuation allowance	(30,364)	(22,289)
Total noncurrent deferred tax assets	112,209	163,688
Noncurrent deferred tax liabilities:
Intangible basis	149,328	218,582
Discount on 2018 Notes	1,874	7,005
Other liabilities	11,816	18,004
Total noncurrent deferred tax liabilities	163,018	243,591
Net noncurrent deferred tax asset	233	232
Net noncurrent deferred tax liability	(51,042)	(80,135)
Net deferred tax liability	$ (50,809)	$ (79,903)

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Provision or Benefit for Income Taxes from Continuing Operations (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
U.S. statutory rate	35.00%	35.00%	35.00%
State income taxes (net of federal tax benefit)	3.00%	2.60%	2.80%
Stock-based compensation	0.60%	24.10%	4.70%
Change in valuation allowance	4.70%	(30.20%)	(160.50%)
Foreign rate differential	1.30%	5.20%	2.00%
Non-deductible compensation costs	1.30%	5.20%	2.00%
Change in tax rates	(1.00%)	13.60%	(0.60%)
Foreign currency translation adjustment	(1.40%)	15.30%	0.00%
Unremitted foreign earnings and profits	0.00%	(0.80%)	0.70%
Transaction costs	0.50%	4.90%	0.00%
Tax impacts of the Act	(41.20%)	0.00%	0.00%
Other	0.70%	(2.90%)	(1.90%)
Income tax expense (benefit)	3.50%	72.00%	(115.80%)

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance	$ 3,859	$ 3,494	$ 3,431
Additions in unrecognized tax benefits – prior year tax positions	1,565	50	73
Additions in unrecognized tax benefits – current year tax positions	656	540	300
Reductions in unrecognized tax benefits – prior year tax positions	546
Reductions in unrecognized tax benefits – current year tax positions			(62)
Lapse of statute of limitations	(42)	(225)	(248)
Ending Balance	$ 5,492	$ 3,859	$ 3,494

Employee Savings Plans - Additi

Employee Savings Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
401(K) savings plan, vesting percentage	100.00%
401(K) savings plan, contribution expense	$ 2,400,000	$ 1,800,000	$ 1,100,000
Deferred Compensation Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
401(K) savings plan, contribution expense		100,000	100,000
Management | Deferred Compensation Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
401(K) savings plan, contribution expense	$ 0	$ 600,000	$ 800,000

Quarterly Results for 2017 an76

Quarterly Results for 2017 and 2016 (Unaudited) Quarterly Results for 2017 and 2016 (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 31, 2017	Mar. 09, 2016	Dec. 31, 2017	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Nov. 01, 2017
Effect of Fourth Quarter Events [Line Items]
Revenue				$ 188,845	$ 188,567	$ 186,731	$ 185,118	$ 187,203	$ 190,686	$ 187,818	$ 144,798	$ 749,261	$ 710,505	$ 543,461
Income from operations				21,473	23,602	22,998	20,542	12,121	18,093	7,578	6,912	88,615	44,704	$ 61,714
Net income (loss)				$ 30,765	$ 8,300	$ 8,046	$ 6,518	$ 1,913	$ 3,346	$ (1,606)	$ 337	$ 53,629	$ 3,990
Basic EPS (loss) (in dollars per share)				$ 0.65	$ 0.17	$ 0.16	$ 0.13	$ 0.04	$ 0.07	$ (0.03)	$ 0.01	$ 1.10	$ 0.08	$ 1.79
Diluted EPS (loss) (in dollars per share)				$ 0.62	$ 0.16	$ 0.16	$ 0.13	$ 0.04	$ 0.07	$ (0.03)	$ 0.01	$ 1.06	$ 0.08	$ 1.72
Total acquisition consideration												$ 20,433	$ 0	$ 0
Impairment of domain name inventory							$ 100		$ 2,000			100	2,000
Impairment of certain technology				$ 200								200
Restructuring charges				500		$ 400		$ 1,600				1,260	3,617	559
Income tax expense (benefit)				$ (17,800)				2,300				$ 1,925	10,252	$ (48,260)
Impairment of leasehold improvements, furniture and fixtures, and office equipment								7,100					7,100
DonWeb
Effect of Fourth Quarter Events [Line Items]
Percentage of equity interests acquired	100.00%
Purchase price paid in cash	$ 8,600
Contingent consideration maximum consideration	2,000
Liability incurred	1,700
Total acquisition consideration	$ 10,300
Acquisio Inc.
Effect of Fourth Quarter Events [Line Items]
Purchase price paid in cash			$ 8,700
Contingent consideration															$ 600
Yodle, Inc.
Effect of Fourth Quarter Events [Line Items]
Percentage of equity interests acquired		100.00%
Purchase price paid in cash		$ 300,300
Acquisition related costs		$ 3,900											3,900
State and Local Jurisdiction
Effect of Fourth Quarter Events [Line Items]
Decrease in valuation allowance due to change in amount estimated to be used								$ 2,400					$ 2,400

Accumulated Other Comprehensi77

Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ 274,636	$ 235,452	$ 238,177	$ 174,090
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(4,503)	(4,019)
Unrealized gains on investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	0	(1)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (4,503)	$ (4,020)	$ (2,148)	$ (1,393)

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
wwwwConversant
Related Party Transaction
Expenses from transactions with related party	$ 0.6	$ 0.7	$ 0.9

Restructuring - Additional Info

Restructuring - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve
Restructuring charges	$ 500	$ 400	$ 1,600	$ 1,260	$ 3,617	$ 559
Lease Restructuring And Severance
Restructuring Cost and Reserve
Restructuring charges				800
Severance
Restructuring Cost and Reserve
Restructuring charges					2,200
Lease restructuring
Restructuring Cost and Reserve
Restructuring charges				$ 500	$ 1,400

Asset Impairments Asset Impai80

Asset Impairments Asset Impairments (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring and Related Activities [Abstract]
Asset impairments					$ 291	$ 9,091	$ 0
Impairment of certain technology	$ 200				200
Impairment of domain name inventory		$ 100		$ 2,000	$ 100	2,000
Impairment of leasehold improvements, furniture and fixtures, and office equipment			$ 7,100			$ 7,100