Ziff Davis (ZD) 10-Q 11 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	3 Months Ended
	Mar. 31, 2015	5-May-15
Document And Entity Information [Abstract]
Entity Registrant Name	J2 GLOBAL, INC.
Entity Central Index Key	1084048
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		48,206,638

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS
Cash and cash equivalents	$392,017	$433,663	$208,068	$207,801
Short-term investments	85,759	96,206
Accounts receivable, net of allowances of $3,802 and $3,685, respectively	82,572	91,699
Prepaid expenses and other current assets	24,611	22,602
Deferred income taxes	2,146	2,013
Total current assets	587,105	646,183
Long-term investments	61,718	60,508
Property and equipment, net	36,618	38,217
Tradenames, net	105,854	105,551
Patent and patent licenses, net	22,968	24,927
Customer relationships, net	184,328	163,766
Goodwill	669,374	635,675
Other purchased intangibles, net	16,146	17,556
Other assets	14,125	12,819
Total assets	1,698,236	1,705,202
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	81,008	95,310
Income taxes payable	2,959	0
Deferred revenue, current	73,278	63,457
Capital Lease Obligations, Current	441	258
Deferred income taxes	185	342
Total current liabilities	157,871	159,367
Long-term Debt	595,266	593,350
Capital Lease Obligations, Noncurrent	66	141
Liability for uncertain tax positions	40,145	37,551
Deferred income taxes	63,109	61,960
Deferred revenue, non-current	8,905	10,182
Other long-term liabilities	17,915	22,416
Total liabilities	883,277	884,967
Commitments and contingencies
Common stock, $0.01 par value. Authorized 95,000,000; total issued and outstanding 47,435,192 and 47,409,514 shares, respectively	474	474
Additional paid-in capital	275,420	273,304
Retained Earnings (Accumulated Deficit)	561,049	553,584
Accumulated other comprehensive loss	-21,984	-7,127
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	814,959	820,235
Total liabilities and stockholders' equity	1,698,236	1,705,202
Series A Preferred Stock [Member]
LIABILITIES AND STOCKHOLDERS' EQUITY
Preferred stock, $0.01 par value	0	0
Series B Preferred Stock [Member]
LIABILITIES AND STOCKHOLDERS' EQUITY
Preferred stock, $0.01 par value	$0	$0

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified
Allowance for doubtful accounts	$0	$3,685
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	95,000,000	95,000,000
Common stock, shares issued	47,435,192	47,409,514
Common stock, shares outstanding	47,435,192	47,409,514
Preferred stock, par value	$0.01	$0.01
Treasury Stock, shares	0	0
Series A Preferred Stock [Member]
Preferred stock, shares authorized	6,000	6,000
Preferred stock, shares issued	0	0
Preferred Stock, Shares Outstanding	0	0
Series B Preferred Stock [Member]
Preferred stock, shares authorized	20,000	20,000
Preferred stock, shares issued	0	0
Preferred Stock, Shares Outstanding	0	0

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Income (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Total revenues	$161,253	$134,124
Cost of revenues (including share-based compensation of $83 and $154 for the three months of 2015 and 2014, respectively)	28,186	23,388
Gross profit	133,067	110,736
Operating expenses:
Sales and marketing (including share-based compensation of $584 and $491 for the three months of 2015 and 2014, respectively)	37,590	32,959
Research, development and engineering (including share-based compensation of $194 and $140 for the three months of 2015 and 2014, respectively)	8,447	7,213
General and administrative (including share-based compensation of $2,143 and $1,599 for the three months of 2015 and 2014, respectively)	46,500	28,979
Total operating expenses	92,537	69,151
Income (loss) from operations	40,530	41,585
Interest expense (income), net	10,313	4,948
Other expense (income), net	-784	-319
Income (loss) before income taxes	31,001	36,956
Income Tax Expense (Benefit)	9,124	8,191
Net income attributable to j2 Global, Inc. common shareholders	21,877	28,765
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$21,877	$28,765
Net income per common share:
Basic	$0.45	$0.61
Diluted	$0.45	$0.60
Weighted average shares outstanding:
Basic	47,422,396	46,365,158
Diluted	47,766,088	46,765,732
Cash dividends paid per common share	$0.29	$0.26

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Income Condensed Consolidated Statements of Income (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Allocated Share-based Compensation Expense	$3,004	$2,384
Cost of Sales [Member]
Allocated Share-based Compensation Expense	83	154
Selling and Marketing Expense [Member]
Allocated Share-based Compensation Expense	584	491
Research and Development Expense [Member]
Allocated Share-based Compensation Expense	194	140
General and Administrative Expense [Member]
Allocated Share-based Compensation Expense	$2,143	$1,599

Condensed_Consolidated_Stateme2

Condensed Consolidated Statement of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$21,877	$28,765
Foreign currency translation adjustment, net of tax expense of zero and $201 for three months of 2015 and 2014, respectively	-15,237	837
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit) of $177 and ($1,529) for the three months of 2015 and 2014, respectively	380	-2,640
Other Comprehensive Income (Loss), Net of Tax	-14,857	-1,803
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$7,020	$26,962

Condensed_Consolidated_Stateme3

Condensed Consolidated Statement of Comprehensive Income Condensed Consolidated Statement of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Foreign currency translation adjustment	$0	$201
Unrealized gain on available-for-sale investments	177	-1,529
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Noncontrolling Interest	$0	$0

Condensed_Consolidated_Stateme4

Condensed Consolidated Statement Of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$21,877	$28,765
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	21,287	13,137
Amortization of discount or premium of investments	273	352
Amortization of financing costs and discounts	2,222	162
Share-based compensation	3,004	2,384
Excess tax benefits from share-based compensation	-334	-4,082
Provision for doubtful accounts	1,610	732
Deferred income taxes	-494	-211
(Gain) loss on sale of available-for-sale investments	-24	-40
Decrease (increase) in:
Accounts receivable	9,254	8,452
Prepaid expenses and other current assets	-4	-1,657
Other assets	25	147
(Decrease) increase in:
Accounts payable and accrued expenses	-12,902	-16,228
Income taxes payable	-1,283	4,723
Deferred revenue	-1,340	205
Liability for uncertain tax positions	2,595	351
Other	-50	102
Net cash provided by operating activities	45,716	37,294
Cash flows from investing activities:
Maturity of certificates of deposit	0	8,210
Sales of available-for-sale investments	28,994	29,705
Purchase of available-for-sale investments	-19,819	-11,213
Purchases of property and equipment	-2,956	-2,936
Acquisition of businesses, net of cash received	-72,215	-49,068
Purchases of intangible assets	-327	-915
Net cash used in investing activities	-66,323	-26,217
Cash flows from financing activities:
Repurchases of common stock and restricted stock	-705	-4,042
Issuance of common stock under employee stock purchase plan	61	55
Exercise of stock options	65	4,926
Dividends paid	-14,110	-12,418
Excess tax benefits from share-based compensation	334	4,082
Deferred payments for acquisitions	-2,356	-3,314
Proceeds from (Payments for) Other Financing Activities	-50	0
Net cash used in financing activities	-16,761	-10,711
Effect of exchange rate changes on cash and cash equivalents	-4,278	-99
Net change in cash and cash equivalents	-41,646	267
Cash and cash equivalents	392,017	208,068
Cash and cash equivalents at end of period	$392,017	$208,068

Basis_Of_Presentation

Basis Of Presentation	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies [Text Block]	Basis of Presentation
	j2 Global, Inc., together with its subsidiaries (“j2 Global” or the "Company"), is a leading provider of Internet services. Through its Business Cloud Services Division, the Company provides cloud services to businesses of all sizes, from individuals to enterprises, and licenses its intellectual property ("IP") to third parties. In addition, the Business Cloud Services Division includes our j2 Cloud Connect, which is primarily focused on our DID-based voice and fax services. The Digital Media Division specializes in the technology and gaming markets, reaching in-market buyers and influencers in both the consumer and business-to-business space.
	The accompanying interim condensed consolidated financial statements include the accounts of j2 Global and its direct and indirect wholly-owned and less-than-wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
	The accompanying interim condensed consolidated financial statements are unaudited and have been prepared in accordance with instructions for Form 10-Q and Article 10 of Regulation S-X issued by the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information and note disclosures required by GAAP for complete financial statements although the Company believes that that disclosures made are adequate to make that information not misleading. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been reflected in these interim financial statements. These financial statements should be read in conjunction with the audited financial statements and related notes for the year ended December 31, 2014 included in our Annual Report on Form 10-K filed with the SEC on March 2, 2015. Accordingly, significant accounting policies and other disclosures normally provided have been omitted since such items are disclosed therein.
	The results of operations for this interim period are not necessarily indicative of the operating results for the full year or for any future period.
	Holding Company Reorganization
	On June 10, 2014, j2 Global, Inc., a Delaware corporation, completed a corporate reorganization (the “Holding Company Reorganization”) pursuant to which j2 Global, Inc. (the “Predecessor”), merged with j2 Merger Sub, Inc., a Delaware corporation and an indirect, wholly owned subsidiary of the Predecessor, and changed its name to “j2 Cloud Services, Inc.” The Predecessor surviving the merger became a direct, wholly owned subsidiary of a new public holding company, j2 Global Holdings, Inc. (the “Holding Company”), which in connection with the merger changed its name to j2 Global, Inc.
	At the effective time of the merger and in connection with the Holding Company Reorganization, all outstanding shares of common stock and preferred stock of the Predecessor were automatically converted into identical shares of common stock or preferred stock, as applicable, of the Holding Company on a one-for-one basis, and the Predecessor’s existing stockholders and other equity holders became stockholders and equity holders, as applicable, of the Holding Company in the same amounts and percentages as they were in the Predecessor prior to the Holding Company Reorganization.
	Further information related to the merger and the Holding Company Reorganization is contained in the Agreement and Plan of Merger set forth as an exhibit to the Form 8-K filed with the SEC on June 10, 2014.
	Use of Estimates
	The preparation of consolidated financial statements in accordance with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements, including judgments about investment classifications, and the reported amounts of net revenue and expenses during the reporting period. We believe that our most significant estimates are those related to valuation and impairment of marketable securities, valuation of assets acquired and liabilities assumed in connection with business combinations, long-lived and intangible asset impairment, contingent consideration, income taxes and contingencies and allowance for doubtful accounts. On an ongoing basis, management evaluates its estimates based on historical experience and on various other factors that the Company believes to be reasonable under the circumstances. Actual results could materially differ from those estimates.
	Allowances for Doubtful Accounts
	j2 Global reserves for receivables it may not be able to collect. The reserves for the Company's Business Cloud Services segment are typically driven by the historical volume of credit card declines, an evaluation of current market conditions and past due invoices based on historical experience. The reserves for the Company's Digital Media segment are typically driven by past due invoices based on historical experience. Management evaluates the adequacy of these reserves on an ongoing basis.
	Revenue Recognition
	Business Cloud Services
	The Company's Business Cloud Services revenues substantially consist of monthly recurring subscription and usage-based fees, which are primarily paid in advance by credit card. In accordance with GAAP, the Company recognizes revenue when persuasive evidence of an arrangement exists, services have been provided, the sales price is fixed and determinable and collection is probable. The Company defers the portions of monthly, quarterly, semi-annually and annually recurring subscription and usage-based fees collected in advance and recognizes them in the period earned. Additionally, the Company defers and recognizes subscriber activation fees and related direct incremental costs over a subscriber's estimated useful life.
	j2 Global's Business Cloud Services also include patent license revenues generated under license agreements that provide for the payment of contractually determined fully paid-up or royalty-bearing license fees to j2 Global in exchange for the grant of non-exclusive, retroactive and future licenses to our intellectual property, including patented technology. Patent revenues may also consist of revenues generated from the sale of patents. Patent license revenues are recognized when earned over the term of the license agreements. With regard to fully paid-up license arrangements, the Company recognizes as revenue in the period the license agreement is executed the portion of the payment attributable to past use of the intellectual property and amortizes the remaining portion of such payments on a straight-line basis, or pro-rata revenue basis, as appropriate over the life of the licensed patent(s). With regard to royalty-bearing license arrangements, the Company recognizes revenues of license fees earned during the applicable period. With regard to patent sales, the Company recognizes as revenue in the period of the sale the amount of the purchase price over the carrying value of the patent(s) sold.
	The Business Cloud Services business also generates revenues by licensing certain technology to third parties. These licensing revenues are recognized when earned in accordance with the terms of the underlying agreement. Generally, revenue is recognized as the third party uses the licensed technology over the period.
	Digital Media
	The Company's Digital Media revenues primarily consist of revenues generated from the sale of advertising campaigns that are targeted to the Company's proprietary websites and to those websites operated by third parties that are part of the Digital Media business's advertising network. Revenues for these advertising campaigns are recognized as earned either when an ad is placed for viewing by a visitor to the appropriate web page or when the visitor "clicks through" on the ad, depending upon the terms with the individual advertiser.
	Revenues for Digital Media business-to-business operations consist of lead-generation campaigns for IT vendors and are recognized as earned when the Company delivers the qualified leads to the customer.
	j2 Global also generates Digital Media revenues through the license of certain assets to clients, for the clients' use in their own promotional materials or otherwise. Such assets may include logos, editorial reviews, or other copyrighted material. Revenues under such license agreements are recognized when the assets are delivered to the client. Also, Digital Media revenues are generated through the license of certain speed testing technology which is recognized when delivered to the client through providing data services primarily to Internet Service Providers ("ISPs") and wireless carriers which is recognized as earned over the term of the access period. The Digital Media business also generates other types of revenues, including business listing fees, subscriptions to online publications, and from other sources. Such other revenues are recognized as earned.
	Fair Value Measurements
	As of March 31, 2015 and December 31, 2014, the carrying value of cash and cash equivalents, short-term investments, accounts receivable, interest receivable, accounts payable, accrued expenses, interest payable, customer deposits and long-term debt are reflected in the financial statements at cost. With the exception of long-term debt, cost approximates fair value due to the short-term nature of such instruments. The fair value of the Company's senior unsecured notes was determined using the quoted market prices of debt instruments with similar terms and maturities, if available. As of the same dates, the carrying value of other long-term liabilities approximated fair value as the related interest rates approximate rates currently available to j2 Global.
	Debt Issuance Costs and Debt Discount
	j2 Global capitalizes costs incurred with borrowing and issuance of debt securities and records debt discounts as a reduction to the debt amount. j2 Global capitalized third-party costs incurred in connection with its sale of senior unsecured notes within long-term other assets and recorded the original purchase discount as a reduction to such notes (See Note 7 - Long Term Debt). These costs and discounts are amortized and included in interest expense over the life of the borrowing or term of the credit facility using the interest method.
	Concentration of Credit Risk
	All of the Company’s cash, cash equivalents and marketable securities are invested primarily at major financial institutions within the United States, United Kingdom and Ireland, with cash and cash equivalents also held at financial institutions within several other countries, including Australia, Austria, Canada, China, France, Germany, Italy, Japan, New Zealand, the Netherlands and Poland. These institutions are required to invest the Company’s cash in accordance with the Company’s investment policy with the principal objectives being preservation of capital, fulfillment of liquidity needs and above market returns commensurate with preservation of capital. The Company’s investment policy also requires that investments in marketable securities be in only highly rated instruments, with limitations on investing in securities of any single issuer. However, these investments are not insured against the possibility of a total or near complete loss of earnings or principal and are inherently subject to the credit risk related to the continued credit worthiness of the underlying issuer and general credit market risks.
	At March 31, 2015 and December 31, 2014, the Company’s cash and cash equivalents were maintained in accounts that are insured up to the limit determined by the applicable governmental agency. The Company's deposits held in qualifying financial institutions in Ireland are fully insured through March 28, 2018 to the extent on deposit prior to March 28, 2013. With respect to the Company's deposits with financial institutions in other jurisdictions, the insured amounts are immaterial in comparison to the total amount of the Company’s cash and cash equivalents held by these institutions which is not insured.
	Contingent Consideration
	j2 Global measures contingent earn-out liabilities in connection with acquisitions at fair value on a recurring basis using significant unobservable inputs and such liabilities are classified within Level 3 of the fair value hierarchy (see Note 5 - Fair Value Measurements). The Company may use various valuation techniques depending on the terms and conditions of the contingent consideration including a Monte-Carlo simulation. This simulation uses a probability distribution for each significant input to produce hundreds or thousands of possible outcomes and the results are analyzed to determine probabilities of different outcomes occurring. Significant increases or decreases to these inputs in isolation would result in a significantly higher or lower liability with a higher liability capped by the contractual maximum of the contingent earn-out obligation, if any. Ultimately, the liability will be equivalent to the amount paid, and the difference between the fair value estimate and the amount paid will be recorded in earnings. If the amount paid that is less than the liability on the acquisition date, such deficiency is reflected as cash used in financing activities in our consolidated statements of cash flows. Any amount paid in excess of the liability on the acquisition date is reflected as cash used in operating activities.
	j2 Global reviews and re-assess the estimated fair value of contingent consideration on a quarterly basis, and the updated fair value could be materially different from the initial estimates or prior quarterly amounts. Changes in the estimated fair value of our contingent earn-out liabilities are reported in operating income, except for the time component of the present value calculation which is reported in interest expense.
	Income Taxes
	The Company must make certain estimates and judgments in determining income tax expense for financial statement purposes. These estimates and judgments occur in the following areas, among others: (i) calculation of tax credits, benefits and deductions; (ii) calculation of tax assets and liabilities arising from differences in the timing of recognition of revenue and expense for tax and financial statement purposes; and (iii) interest and penalties related to uncertain tax positions. Significant changes to these estimates may result in an increase or decrease to the Company’s tax provision in the current or a subsequent period.
	The Company must assess the likelihood that it will be able to recover its deferred tax assets. If recovery is not likely, the Company must increase its provision for taxes by recording a valuation allowance against the deferred tax assets that the Company estimates will not ultimately be recoverable. The Company believes that it will ultimately recover a substantial majority of the deferred tax assets recorded on its condensed consolidated balance sheets. However, should there be a change in the Company’s ability to recover its deferred tax assets, the Company’s tax provision would increase as a result of recording any necessary valuation allowances, in the period in which j2 Global determined that the recovery was not likely.
	The calculation of the Company’s tax liabilities involves dealing with uncertainties in the application of complex tax laws. j2 Global recognizes liabilities for uncertain tax positions based on a two-step process. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. If the Company determines that a tax position will more likely than not be sustained on audit, then the second step requires j2 Global to estimate and measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. It is inherently difficult and subjective to estimate such amounts, as j2 Global has to determine the probability of various possible outcomes. j2 Global reevaluates these uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, effectively settled issues under audit and new audit activity. Such a change in recognition or measurement would result in the recognition of a tax benefit or an additional charge to the tax provision.
	Earnings Per Common Share
	Earnings per common share ("EPS") is calculated pursuant to the two-class method as defined in ASC Topic No. 260, Earnings per Share (“ASC 260”), which specifies that all outstanding unvested share-based payment awards that contain rights to nonforfeitable dividends or dividend equivalents are considered participating securities and should be included in the computation of EPS pursuant to the two-class method.
	Basic EPS is calculated by dividing net distributed and undistributed earnings allocated to common shareholders, excluding participating securities and the net income attributable to noncontrolling interest, by the weighted-average number of common shares outstanding. The Company's participating securities consist of its unvested share-based awards that contain rights to nonforfeitable dividends or dividend equivalents.
	Diluted EPS includes the determinants of basic EPS and, in addition, reflects the impact of other potentially dilutive shares outstanding during the period.  The dilutive effect of participating securities is calculated under the more dilutive of either the treasury method or the two-class method. In connection with the Company's issuance of convertible notes (See Note 7 - Long Term Debt) during the second quarter of 2014, the Company currently intends to satisfy the conversion obligation by paying and delivering a combination of cash and shares of the Company's common stock, where cash will be used to settle each $1,000 of principal and the remainder, if any, will be settled via the Company's common shares. As a result, the potential common shares to satisfy the excess conversion value will be included in the presentation of diluted EPS only to the extent that the conversion features are in-the-money and the effect is dilutive.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, as a new Topic, Accounting Standards Codification (ASC) Topic 606.  The new revenue recognition standard provides a five-step analysis of transactions to determine when and how revenue is recognized.  The core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This ASU is effective for annual periods beginning after December 15, 2016 and shall be applied retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption.  The Company is evaluating the effect and methodology of adopting this new accounting guidance upon the Company's results of operations, cash flows and financial position.
	In August 2014, the FASB issued ASU No. 2014-15, Disclosure of Uncertainties About an Entity's Ability to Continue as a Going Concern. The new standard provides guidance around management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The adoption of this standard is not expected to have a material impact on our financial statements.
	In November 2014, the FASB issued ASU No. 2014-16, Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share is More Akin to Debt or to Equity, which clarifies how current guidance should be interpreted in evaluating the economic characteristics and risks of a host contract in a hybrid financial instrument that is issued in the form of a share. Specifically, the amendments clarify that an entity should consider all relevant terms and features, including the embedded derivative feature being evaluated for bifurcation, in evaluating the nature of the host contract. The assessment of the substance of the relevant terms and features should incorporate a consideration of: (1) the characteristics of the terms and features themselves; (2) the circumstances under which the hybrid financial instrument was issued or acquired; and (3) the potential outcomes of the hybrid financial instrument, as well as the likelihood of those potential outcomes. The amendments in this ASU apply to all entities that are issuers of, or investors in, hybrid financial instruments that are issued in the form of a share. The amendments in this ASU are effective for annual reporting periods beginning after December 15, 2015, including interim periods within that reporting period. Early adoption is permitted. The Company is currently evaluating the impact of adoption on our financial statements and related disclosures.
	In January 2015, the FASB issued ASU No. 2015-01, Income Statement - Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on our financial statements.
	In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis. The amendments in this ASU provide guidance which changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. The amendments in this ASU are effective for public business entities for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted, including adoption in an interim period. The adoption of this standard is not expected to have a material impact on our financial statements.
	In April 2015, the FASB issued ASU No. 2015-03, Interest - Imputation Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The amendments in this ASU provide guidance which require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The amendments in this ASU are effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted for financial statements that have not been previously issued. The adoption of this standard is not expected to have a material impact on our financial statements.
	In April 2015, the FASB issued ASU No. 2015-05, Intangibles - Goodwill and Other Internal - Use Software (Subtopic 350-40): Customer's Accounting for Fees Paid in a Cloud Computing Arrangement. The amendments in this ASU provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. The amendments in this ASU are effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2015. An entity can elect to adopt the amendments either (1) prospectively to all arrangements entered into or materially modified after the effective date or (2) retrospectively. Earl adoption is permitted. The adoption of this standard is not expected to have a material impact on our financial statements.

Business_Acquisition

Business Acquisition	3 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Business Acquisition	Business Acquisitions
	The Company uses acquisitions as a strategy to grow its customer base by increasing its presence in new and existing markets, expand and diversify its service offerings, enhance its technology and acquire skilled personnel.
	The Company completed the following acquisitions during the first three months of fiscal 2015, paying the purchase price in cash in each transaction: (a) a share purchase of the entire issued share capital of Firstway, an Ireland-based distributor of FaxBOX® digital fax services; (b) an asset purchase of Nuvotera (formerly known as Spam Soap), a California-based supplier of email security; (c) an asset purchase of EmailDirect, a California-based provider of email marketing services; (d) an asset purchase of SugarSync®, Inc., a California-based provider of online file backup, synchronization and sharing assets; and (e) other immaterial asset acquisitions of online data backup in the Business Cloud Services segment.
	The condensed consolidated statement of income, since the date of each acquisition, and balance sheet, as of March 31, 2015, reflect the results of operations of all 2015 acquisitions. For the three months ended March 31, 2015, these acquisitions contributed $2.9 million to the Company's revenues. Net income contributed by these acquisitions was not separately identifiable due to j2 Global's integration activities and is impracticable to provide. Total consideration for these transactions was $73.5 million, net of cash acquired and assumed liabilities and is subject to certain post-closing adjustments which may increase or decrease the final consideration paid.
	The following table summarizes the allocation of the purchase consideration for these acquisitions (in thousands):
	Assets and Liabilities	Valuation
	Accounts receivable	$	2,154
	Property and equipment	1,017
	Other assets	259
	Software	267
	Trade names	2,934
	Customer relationships	36,902
	Other intangibles	33
	Goodwill	40,557
	Other accrued liabilities	(1,327		)
	Deferred revenue	(7,671		)
	Capital lease	(199		)
	Deferred tax liability	(1,459		)
	Total	$	73,467
	The initial accounting for the 2015 acquisitions is incomplete and subject to change, which may be significant. j2 Global has recorded provisional amounts which may be based upon past acquisitions with similar attributes for certain intangible assets (including trade names, software and customer relationships), preliminary acquisition date working capital and related tax items. Actual amounts recorded upon finalization of the purchase accounting may differ materially from the information presented in this Quarterly Report on Form 10-Q. During the three months ended March 31, 2015, the Company recorded adjustments to the initial working capital related to prior period acquisitions and finalized the fair value of contingent consideration associated with the acquisition of Scene LLC ("Ookla"), which resulted in a net decrease in goodwill in the amount of $(0.8) million.
	Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired and represents intangible assets that do not qualify for separate recognition. Goodwill recognized associated with these acquisitions during the three months ended March 31, 2015 is $40.6 million, of which $20.4 million is expected to be deductible for income tax purposes.

Investments

Investments	3 Months Ended
	Mar. 31, 2015
Investments [Abstract]
Investments	Investments
	Short-term investments consist generally of corporate and governmental debt securities and certificates of deposits, which are stated at fair market value. Realized gains and losses of short and long-term investments are recorded using the specific identification method.
	The following table summarizes j2 Global’s debt securities designated as available-for-sale, classified by the contractual maturity date of the security (in thousands):
		March 31,		December 31, 2014
		2015
	Due within 1 year	$	49,378	$	59,896
	Due within more than 1 year but less than 5 years	61,386		60,178
	Due within more than 5 years but less than 10 years	—		—
	Due 10 years or after	332		330
	Total	$	111,096	$	120,404
	The following table summarizes the Company’s investments (in thousands):
		March 31,		December 31, 2014
		2015
	Available-for-sale	$	147,417	$	156,649
	Certificates of deposit	60		65
	Total	$	147,477	$	156,714
	The following table summarizes the gross unrealized gains and losses and fair values for the Company's investments classified as available-for-sale investments as of March 31, 2015 and December 31, 2014 aggregated by major security type (in thousands):
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			Losses
	March 31, 2015
	Corporate debt securities	$	80,043	$	164		$	(44	)	$	80,163
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	28,849		21			(4		)	28,866
	Debt securities issued by states of the United States and political subdivisions of the states	2,064		3			—			2,067
	Equity securities	20,611		15,710			—			36,321
	Total	$	131,567	$	15,898		$	(48	)	$	147,417
	December 31, 2014
	Corporate debt securities	$	91,456	147			$	(136	)	$	91,467
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	26,848		9			(13		)	26,844
	Debt securities issued by states of the United States and political subdivisions of the states	2,088		5			—			2,093
	Equity securities	20,611		15,634			—			36,245
	Total	$	141,003	$	15,795		$	(149	)	$	156,649
	At March 31, 2015, corporate and governmental debt securities, which have a fixed interest rate, were recorded as available-for-sale. There have been no significant changes in the maturity dates and average interest rates for the Company’s investment portfolio and debt obligations subsequent to March 31, 2015. At March 31, 2015, equity securities were recorded as available-for-sale and represent a strategic equity investment in Carbonite, Inc. At March 31, 2015, the Company’s available-for-sale securities are carried at fair value, with the unrealized gains and losses reported as a component of stockholders’ equity.
	Recognition and Measurement of Other-Than-Temporary Impairment
	j2 Global regularly reviews and evaluates each investment that has an unrealized loss. An unrealized loss exists when the current fair value of an individual security is less than its amortized cost basis. Unrealized losses that are determined to be temporary in nature are recorded, net of tax, in accumulated other comprehensive income for available-for-sale securities.
	Regardless of the classification of the securities, the Company has assessed each position for impairment.
	Factors considered in determining whether a loss is temporary include:
	•	the length of time and the extent to which fair value has been below cost;
	•	the severity of the impairment;
	•	the cause of the impairment and the financial condition and near-term prospects of the issuer;
	•	activity in the market of the issuer which may indicate adverse credit conditions; and
	•	the Company’s ability and intent to hold the investment for a period of time sufficient to allow for any anticipated recovery.
	j2 Global’s review for impairment generally entails:
	•	identification and evaluation of investments that have indications of possible impairment;
	•	analysis of individual investments that have fair values less than amortized cost, including consideration of the length of time the investment has been in an unrealized loss position and the expected recovery period;
	•	discussion of evidential matter, including an evaluation of factors or triggers that could cause individual investments to qualify as having an other-than-temporary impairment and those that would not support an other-than-temporary impairment;
	•	documentation of the results of these analyses, as required under business policies; and
	•	information provided by third-party valuation experts.
	For these securities, a critical component of the evaluation for other-than-temporary impairments is the identification of credit impairment, where management does not expect to receive cash flows sufficient to recover the entire amortized cost basis of the security. Credit impairment is assessed using a combination of a discounted cash flow model that estimates the cash flows on the underlying securities and a market comparables method, where the security is valued based upon indications from the secondary market of what discounts buyers demand when purchasing similar securities. The cash flow model incorporates actual cash flows from the securities through the current period and then projects the remaining cash flows using relevant interest rate curves over the remaining term. These cash flows are discounted using a number of assumptions, some of which include prevailing implied credit risk premiums, incremental credit spreads and illiquidity risk premiums, among others.
	Securities that have been identified as other-than-temporarily impaired are written down to their current fair value. For debt securities that are intended to be sold or that management believes it more-likely-than-not that will be required to sell prior to recovery, the full impairment is recognized immediately in earnings.
	For available-for-sale securities that management has no intent to sell and believes that it more-likely-than-not will not be required to sell prior to recovery, only the credit loss component of the impairment is recognized in earnings, while the rest of the fair value impairment is recognized in other comprehensive income. The credit loss component recognized in earnings is identified as the amount of principal cash flows not expected to be received over the remaining term of the security.
	The following tables present gross unrealized losses and fair values for those investments that were in an unrealized loss position as of March 31, 2015 and December 31, 2014, aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in thousands):
		As of March 31, 2015
		Less than 12 Months					12 Months or Greater						Total
		Fair Value		Unrealized Loss			Fair Value			Unrealized Loss			Fair Value		Unrealized Loss
	Corporate debt securities	$	36,947	$	(41	)	$	1,258		$	(3	)	$	38,205	$	(44	)
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	12,345		(4		)	625			—			12,970		(4		)
	Total	$	49,292	$	(45	)	$	1,883		$	(3	)	$	51,175	$	(48	)
		As of December 31, 2014
		Less than 12 Months					12 Months or Greater						Total
		Fair Value		Unrealized Loss			Fair Value			Unrealized Loss			Fair Value		Unrealized Loss
	Corporate debt securities	$	57,898	$	(131	)	$	1,260		$	(5	)	$	59,158	$	(136	)
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	15,072		(13		)	—			—			15,072		(13		)
	Total	$	72,970	$	(144	)	$	1,260		$	(5	)	$	74,230	$	(149	)
As of March 31, 2015 and December 31, 2014, we did not recognize any other-than-temporary impairment losses.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Fair Value Measurements
	j2 Global complies with the provisions of ASC 820, which defines fair value, provides a framework for measuring fair value and expands the disclosures required for fair value measurements of financial and non-financial assets and liabilities. ASC 820 clarifies that the fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. As a basis for considering such assumptions, ASC 820 establishes a three-tier value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value:
		l	Level 1 – Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.
		l	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.
		l	Level 3 – Unobservable inputs which are supported by little or no market activity.
	The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.
	The Company's money market funds and its marketable equity securities are classified within Level 1. The Company values these Level 1 investments using quoted market prices. The Company's debt investments, time deposits and commercial paper, all of which have counterparties with high credit ratings, are classified within Level 2. The Company values these Level 2 investments based on quoted market prices or model-driven valuations using significant inputs derived from or corroborated by observable market data.
	The fair value of the Senior Notes and Convertible Notes (See Note 7 - Long-Term Debt) are determined using recent quoted market prices or dealer quotes for such securities, if available, which are Level 1 inputs. If such information is unavailable, the fair value of these securities is determined using quoted market prices or dealer quotes for instruments with similar maturities and other terms and credit ratings, which are Level 2 inputs. If none of the aforementioned information is available, the fair value of these securities is determined using cash-flow models of the scheduled payments and, for the Convertible Notes, discounted at market interest rates for comparable debt without the conversion feature, which are also Level 2 inputs.
	In addition, the Company may pay contingent interest on the Convertible Notes which is accounted for as a derivative with fair value adjustments being recorded to interest expense. This derivative is fair valued using a binomial lattice convertible bond pricing model using historical and implied market information, which are Level 2 inputs. The total carrying value of long-term debt was $595.3 million and $593.4 million, and the corresponding fair value was approximately $732.8 million and $711.1 million, at March 31, 2015 and December 31, 2014, respectively.
	The Company classifies its contingent consideration liability recorded in connection with acquisitions within Level 3 because factors used to develop the estimated fair value are unobservable inputs, such as volatility and market risks, and are not supported by market activity. The fair value of the contingent consideration liability was determined using option based approaches. This methodology was utilized because the distribution of payments is not symmetric and amounts are only payable upon certain earnings before interest, tax, depreciation and amortization ("EBITDA") thresholds being reached. Such valuation approach included the Monte-Carlo simulation for the contingency since the financial metric driving the payments is path dependent. Significant increases or decreases in either of the inputs noted above in isolation would result in a significantly lower or higher fair value of measurement.
	The following tables present the fair values of the Company’s financial assets or liabilities that are measured at fair value on a recurring basis (in thousands):
	March 31, 2015	Level 1			Level 2		Level 3		Fair Value
	Assets:
	Cash equivalents:
	Money market and other funds	$	190,559		$	—	$	—	$	190,559
	Time deposits	—			21,673		—		21,673
	Corporate commercial papers	—			17,921		—		17,921
	Certificates of deposit	—			60		—		60
	Equity securities	36,321			—		—		36,321
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	—			28,866		—		28,866
	Debt securities issued by states of the U.S. and political subdivisions of the states	—			2,067		—		2,067
	Debt securities issued by foreign governments	—			—		—		—
	Corporate debt securities	—			80,163		—		80,163
	Total assets measured at fair value	$	226,880		$	150,750	$	—	$	377,630
	Liabilities:
	Contingent consideration	$	—		$	—	$	12,000	$	12,000
	Contingent interest derivative	—			742		—		742
	Total liabilities measured at fair value	$	—		$	742	$	12,000	$	12,742
	December 31, 2014	Level 1			Level 2		Level 3		Fair Value
	Assets:
	Cash equivalents:
	Money market and other funds	$	212,645		$	—	$	—	$	212,645
	Time deposits	—			51,807		—		51,807
	Certificates of deposit	—			65		—		65
	Equity securities	36,245			—		—		36,245
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	—			26,844		—		26,844
	Debt securities issued by states of the U.S. and political subdivisions of the states	—			2,093		—		2,093
	Corporate debt securities	—			91,467		—		91,467
	Total assets measured at fair value	$	248,890		$	172,276	$	—	$	421,166
	Liabilities:
	Contingent consideration	$	—		$	—	$	15,000	$	15,000
	Contingent interest derivative	—			742		—		742
	Total liabilities measured at fair value	$	—		$	742	$	15,000	$	15,742
	At the end of each reporting period, management reviews the inputs to measure the fair value measurements of financial and non-financial assets and liabilities to determine when transfers between levels are deemed to have occurred. For the three months ended March 31, 2015, there were no transfers that have occurred between levels.
	The following tables presents a reconciliation of the Company’s Level 3 financial assets or liabilities that are measured at fair value on a recurring basis (in thousands):
		Level 3			Affected line item in the Statement of Income
	Balance as of December 31, 2014	$	15,000
	Contingent consideration	(3,000		)	Not Applicable
	Total (gains) losses reported in earnings	—
	Transfers into or out of Level 3	—
	Balance as of March 31, 2015	$	12,000
	The following tables presents a reconciliation of the Company’s derivative instruments (in thousands):
		Amount			Affected line item in the Statement of Income
	Derivative Liabilities:
	Level 2:
	Balance as of December 31, 2014	$	742
	Total (gains) losses reported in earnings	—
	Balance as of March 31, 2015	$	742
	Losses associated with other-than-temporary impairments are recorded as a component of other income (expenses). Gains and losses not associated with other-than-temporary impairments are recorded as a component of other comprehensive income.

Goodwill_And_Intangible_Assets

Goodwill And Intangible Assets	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill And Intangible Assets	Goodwill and Intangible Assets
	Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. Intangible assets resulting from the acquisitions of entities accounted for using the purchase method of accounting are recorded at the estimated fair value of the assets acquired. Identifiable intangible assets are comprised of purchased customer relationships, trademarks and trade names, developed technologies and other intangible assets. The fair values of these identified intangible assets are based upon expected future cash flows or income, which take into consideration certain assumptions such as customer turnover, trade names and patent lives. These determinations are primarily based upon the Company’s historical experience and expected benefit of each intangible asset. If it is determined that such assumptions are not accurate, then the resulting change will impact the fair value of the intangible asset. Identifiable intangible assets are amortized over the period of estimated economic benefit, which ranges from one to 20 years.
	The changes in carrying amounts of goodwill for the three months ended March 31, 2015 are as follows (in thousands):
		Business Cloud Services				Digital Media				Consolidated
	Balance as of January 1, 2015	$	390,063			$	245,612			$	635,675
	Goodwill acquired (Note 3)	40,557				—				40,557
	Purchase accounting adjustments	3,436				(4,200		)		(764		)
	Foreign exchange translation	(6,069		)		(25		)		(6,094		)
	Balance as of March 31, 2015	$	427,987			$	241,387			$	669,374
	Purchase accounting adjustments relate to adjustments to goodwill in connection with prior year business acquisitions.
	Intangible assets are summarized as of March 31, 2015 and December 31, 2014 as follows (in thousands):
	Intangible Assets with Indefinite Lives:
		March 31,				December 31,
		2015				2014
	Trade name	$	27,379			$	27,379
	Other	5,432				5,432
	Total	$	32,811			$	32,811
	Intangible Assets Subject to Amortization:
	As of March 31, 2015, intangible assets subject to amortization relate primarily to the following (in thousands):
		Weighted-Average		Historical				Accumulated				Net
		Amortization		Cost				Amortization
		Period
	Trade names	14.2 years		$	97,112			$	(18,637	)		$	78,475
	Patent and patent licenses	8.3 years		63,136				(40,168		)		22,968
	Customer relationships	9.0 years		260,380				(76,052		)		184,328
	Other purchased intangibles	4.3 years		28,379				(17,665		)		10,714
	Total			$	449,007			$	(152,522	)		$	296,485
	As of December 31, 2014, intangible assets subject to amortization relate primarily to the following (in thousands):
		Weighted-Average		Historical				Accumulated				Net
		Amortization		Cost				Amortization
		Period
	Trade names	14.5 years		$	94,770			$	(16,598	)		$	78,172
	Patent and patent licenses	9.0 years		62,940				(38,013		)		24,927
	Customer relationships	9.3 years		230,424				(66,658		)		163,766
	Other purchased intangibles	4.3 years		28,360				(16,236		)		12,124
	Total			$	416,494			$	(137,505	)		$	278,989
	Amortization expense, included in general and administrative expense, approximated $16.9 million and $10.0 million for the three month periods ended March 31, 2015 and 2014, respectively. Amortization expense is estimated to approximate $66.1 million, $60.3 million, $47.0 million, $32.1 million and $24.0 million for fiscal years 2015 through 2019, respectively, and $83.9 million thereafter through the duration of the amortization period.

Long_Term_Debt

Long Term Debt	3 Months Ended
	Mar. 31, 2015
Long-term Debt, Unclassified [Abstract]
Debt Disclosure [Text Block]	Long-Term Debt
	8.0% Senior Notes
	On July 26, 2012, the Company's subsidiaries, j2 Cloud Services, Inc., issued in a private offering exempt from the registration requirements of the Securities Act of 1933, as amended, $250 million aggregate principal amount of 8.0% senior unsecured notes (the "Senior Notes") due August 1, 2020. j2 Cloud Services, Inc. received proceeds of $245 million in cash, net of initial purchaser's discounts and commissions of $5 million. As of March 31, 2015, the unamortized discount on the Senior Notes was approximately $3.7 million. Other fees were incurred in connection with the issuance of the Senior Notes and have an unamortized balance of $1.1 million as of March 31, 2015, which is recorded within long-term other assets. The net proceeds were available for general corporate purposes, including acquisitions. Interest is payable semi-annually on February 1 and August 1 of each year beginning on February 1, 2013. j2 Cloud Services, Inc. has the option to call the Senior Notes in whole or in part after August 1, 2016, subject to certain premiums as defined in the indenture governing the Senior Notes plus accrued and unpaid interest. In addition, at any time before August 1, 2016, j2 Cloud Services, Inc. may redeem the Senior Notes, in whole or in part, at a "make-whole" redemption price specified in the indenture plus accrued and unpaid interest, if any, to (but not including) the redemption date. Also, j2 Cloud Services, Inc. may redeem up to 35% of the aggregate principal amount of the Senior Notes using proceeds from certain public offerings of our equity securities at a price equal to 108% of the principal amount plus accrued and unpaid interest, if any, prior to August 1, 2015. Upon a change in control, the holders may put the Senior Notes at 101% of the principal amount of the Senior Notes plus accrued and unpaid interest, if any, to the repurchase date. The Senior Notes are not guaranteed by any of j2 Cloud Services, Inc.'s subsidiaries as of March 31, 2015, because, as of such date, all of j2 Cloud Services, Inc.'s existing domestic restricted subsidiaries are deemed insignificant subsidiaries (as that term is defined in the indenture) or are designated as unrestricted subsidiaries.  If j2 Cloud Services, Inc. or any of its restricted subsidiaries acquires or creates a domestic restricted subsidiary, other than an insignificant subsidiary, after the issue date, or any insignificant restricted subsidiary ceases to fit within the definition of insignificant subsidiary, such restricted subsidiary is required to unconditionally guarantee, jointly and severally, on an unsecured basis, j2 Cloud Services, Inc.'s obligations under the Senior Notes. In connection with the issuance of the Convertible Notes (defined below), j2 Global, Inc. unconditionally guaranteed, on an unsecured basis, the obligations of j2 Cloud Services, Inc. under the Senior Notes.
	The indenture governing the Senior Notes contains certain restrictive and other covenants applicable to j2 Cloud Services, Inc. and subsidiaries designated as restricted subsidiaries including, but not limited to, limitations on debt and disqualified or preferred stock, restricted payments, liens, sale and leaseback transactions, dividends and other payment restrictions, asset sales and transactions with affiliates. Restricted payments are applicable only if j2 Cloud Services, Inc. and subsidiaries designated as restricted subsidiaries has a pro forma leverage ratio of greater than 1.75 to 1.0. In addition, if such leverage ratio is in excess of 1.75 to 1.0, restricted payments are permitted up to $50 million. As of March 31, 2015, j2 Cloud Services, Inc. was in compliance with all such covenants. Violation of these covenants could result in a default which could result in the acceleration of outstanding amounts if such default is not cured or waived within the time periods outlined in the indenture agreement.
	As of March 31, 2015, the estimated fair value of the Senior Notes was approximately $265.4 million and was based on the quoted market prices of debt instruments with similar terms, credit rating and maturities of the Senior Notes as of March 31, 2015.
	3.25% Convertible Notes
	On June 10, 2014, j2 Global issued $402.5 million aggregate principal amount of 3.25% convertible senior notes due June 15, 2029 (the “Convertible Notes”). j2 Global received proceeds of $391.4 million in cash, net of underwriters' discounts and commissions. The net proceeds were available for general corporate purposes. The Convertible Notes bear interest at a rate of 3.25% per annum, payable semiannually in arrears on June 15 and December 15 of each year. Beginning with the six-month interest period commencing on June 15, 2021, the Company must pay contingent interest on the Convertible Notes during any six-month interest period if the trading price per $1,000 principal amount of the Convertible Notes for each of the five trading days immediately preceding the first day of such interest period equals or exceeds $1,300. Any contingent interest payable on the Convertible Notes will be in addition to the regular interest payable on the Convertible Notes.
	Holders may surrender their Convertible Notes for conversion at any time prior to the close of business on the business day immediately preceding the maturity date only if one or more of the following conditions is satisfied: (i) during any calendar quarter commencing after the calendar quarter ending on September 30, 2014 (and only during such calendar quarter), if the closing sale price of j2 Global common stock for at least 20 trading days in the period of 30 consecutive trading days ending on the last trading day of the calendar quarter immediately preceding the calendar quarter in which the conversion occurs is more than 130% of the applicable conversion price of the Convertible Notes on each such trading day; (ii) during the five consecutive business day period following any ten consecutive trading day period in which the trading price for the Convertible Notes for each such trading day was less than 98% of the product of (a) the closing sale price of j2 Global common stock on each such trading day and (b) the applicable conversion rate on each such trading day; (iii) if j2 Global calls any or all of the Convertible Notes for redemption, at any time prior to the close of business on the business day prior to the redemption date; (iv) upon the occurrence of specified corporate events; or (v) during either the period beginning on, and including, March 15, 2021 and ending on, but excluding, June 20, 2021 or the period beginning on, and including, March 15, 2029 and ending on, but excluding, the maturity date. j2 Global will settle conversions of Convertible Notes by paying or delivering, as the case may be, cash, shares of j2 Global common stock or a combination thereof at j2 Global's election. The Company currently intends to satisfy its conversion obligation by paying and delivering a combination of cash and shares of the Company's common stock, where cash will be used to settle each $1,000 of principal and the remainder, if any, will be settled via the Company's common shares.
	The initial conversion rate is 14.4159 shares of our common stock for each $1,000 principal amount of Convertible Notes, which represents an initial conversion price of approximately $69.37 per share of j2 Global common stock. The conversion rate is subject to adjustment for certain events as set forth in the indenture governing the Convertible Notes, but will not be adjusted for accrued interest. In addition, following certain corporate events that occur on or prior to June 20, 2021, j2 Global will increase the conversion rate for a holder that elects to convert its Convertible Notes in connection with such a corporate event.
	j2 Global may not redeem the Convertible Notes prior to June 20, 2021. On or after June 20, 2021, j2 Global may redeem for cash all or part of the Convertible Notes at a redemption price equal to 100% of the principal amount of the Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the Convertible Notes.
	Holders have the right to require j2 Global to repurchase for cash all or part of their Convertible Notes on each of June 15, 2021 and June 15, 2024 at a repurchase price equal to 100% of the principal amount of the Convertible Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the relevant repurchase date. In addition, if a fundamental change, as defined in the indenture governing the Convertible Notes, occurs prior to the maturity date, holders may require j2 Global to repurchase for cash all or part of their Convertible Notes at a repurchase price equal to 100% of the principal amount of the Convertible Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date.
	The Convertible Notes are the Company's general senior unsecured obligations and rank: (i) senior in right of payment to any of the Company's future indebtedness that is expressly subordinated in right of payment to the Convertible Notes; (ii) equal in right of payment to the Company's existing and future unsecured indebtedness that is not so subordinated, including in respect of j2 Global's guarantee of the obligations of our subsidiary, j2 Cloud Services, Inc., with respect to its outstanding Senior Notes; (iii) effectively junior in right of payment to any of the Company's secured indebtedness to the extent of the value of the assets securing such indebtedness; and (iv) structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company's subsidiaries.
	Accounting for the Convertible Notes
	In accordance with ASC 470-20, Debt with Conversion and Other Options, convertible debt that can be settled for cash is required to be separated into the liability and equity component at issuance, with each component assigned a value. The value assigned to the liability component is the estimated fair value, as of the issuance date, of similar debt without the conversion feature. The difference between the cash proceeds and estimated fair value of the liability component, representing the value of the conversion premium assigned to the equity component, is recorded as a debt discount on the issuance date. This debt discount is amortized to interest expense using the effective interest method over the period from the issuance date through the first stated repurchase date on June 15, 2021.
	j2 Global estimated the borrowing rates of similar debt without the conversion feature at origination to be 5.79% for the Convertible Notes and determined the debt discount to be $59.0 million. As a result, a conversion premium after tax of $37.7 million was recorded in additional paid-in capital. As of March 31, 2015, the carrying value of the Convertible Notes was $348.9 million, which consisted of $402.5 million outstanding principal amount net of $53.6 million unamortized debt discount. The aggregate debt discount is amortized as interest expense over the period from the issuance date through the first stated repurchase date on June 15, 2021, which management believes is the expected life of the Convertible Notes using an interest rate of 5.81%. As of March 31, 2015, the remaining period over which the unamortized debt discount will be amortized is 6.2 years.
	In connection with the issuance of the Convertible Notes, the Company incurred $11.7 million of deferred issuance costs, which primarily consisted of the underwriters' discount and legal and other professional service fees. Of the total deferred issuance costs incurred, $10.0 million of such deferred issuance costs was attributable to the liability component and is recorded within other assets and is being amortized to interest expense through June 15, 2021. The remaining $1.7 million ($1.1 million net of tax) of such deferred issuance costs was netted with the equity component in additional paid-in capital at the issuance date. The unamortized balance as of March 31, 2015 was $9.1 million.
	For the first quarter ended March 31, 2015, the Company recognized interest expense of $5.3 million related to the Convertible Notes, comprised of $3.3 million for the contractual coupon interest, $1.7 million related to the amortization of debt discount and $0.3 million related to the amortization of deferred debt issuance costs.
	The Convertible Notes are carried at face value less any unamortized debt discount. The fair value of the Convertible Notes at each balance sheet date is determined based on recent quoted market prices or dealer quotes for the Convertible Notes, if available. If such information is not available, the fair value is determined using cash-flow models of the scheduled payments discounted at market interest rates for comparable debt without the conversion feature. As of March 31, 2015, the estimated fair value of the Convertible Notes was approximately $467.4 million.
	Cash paid for interest on debt for the three months ended March 31, 2015 was $10.0 million.
	Long-term debt as of March 31, 2015 consists of the following (in thousands):
	Senior Notes	$	246,324
	Convertible Notes	348,942
	Total long-term debt	595,266
	Less: current portion	—
	Total long-term debt, less current portion	$	595,266

Commitments_And_Contingencies

Commitments And Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	Commitments and Contingencies
	Litigation
	From time-to-time, j2 Global and its affiliates are involved in litigation and other disputes or regulatory inquiries that arise in the ordinary course of business. Any claims or regulatory actions against j2 Global and its affiliates, whether meritorious or not, could be time consuming and costly, and could divert significant operational resources. The outcomes of such matters are subject to inherent uncertainties, carrying the potential for unfavorable rulings that could include monetary damages and injunctive relief.
	On September 15, 2006, a j2 Global affiliate filed a patent infringement suit against Integrated Global Concepts, Inc. (“IGC”) in the U.S. District Court for the Northern District of Georgia (“Northern District of Georgia”) (No. 1:06-cv-02199). In response, IGC filed counterclaims alleging antitrust violations and breach of contract, in addition to patent-related counterclaims. On July 2, 2012, IGC filed suit against two j2 Global affiliates in the U.S. District Court for the Northern District of California (“Northern District of California”) (No. 5:12-cv-03434), alleging that the j2 Global affiliates breached a covenant not to sue. The j2 Global affiliates asserted counterclaims for infringement of four patents. On June 27, 2013, one of the j2 Global affiliates filed an additional suit against IGC in the Northern District of California (No. 5:13-cv-02971), alleging infringement of an additional patent. On April 1, 2015, all pending cases with IGC were dismissed pursuant to a settlement agreement.
	On January 7, 2011, the Department of Revenue for the State of Washington (“Washington Department of Revenue”) issued assessments to a j2 Global affiliate for business and occupation tax and retail sales tax for the period of January 1, 2004 through September 30, 2010. On November 16, 2012, the Washington Department of Revenue denied the j2 Global affiliate’s petition for correction. The j2 Global affiliate paid the assessments and, on June 21, 2013, filed a complaint against the Washington Department of Revenue in the Superior Court of Washington for Thurston County (No. 13-2-01338-7). In that suit, the j2 Global affiliate is seeking a refund of the entire amount paid and a declaration that the State improperly imposed the taxes. Discovery is ongoing.
	On February 17, 2011, Emmanuel Pantelakis (“Pantelakis”) filed suit against a j2 Global affiliate in the Ontario Superior Court of Justice (No. 11-50673), alleging that the j2 Global affiliate breached a contract relating to Pantelakis’s use of the Campaigner® service. The j2 Global affiliate filed a responsive pleading on March 23, 2011 and responses to undertakings on July 16, 2012. On November 6, 2012, Pantelakis filed a second amended statement of claim, reframing his lawsuit as a negligence action. The j2 Global affiliate filed an amended statement of defense on April 8, 2013. Discovery is ongoing.
	On January 17, 2013, the Commissioner of the Massachusetts Department of Revenue (“Commissioner”) issued a notice of assessment to a j2 Global affiliate for sales and use tax for the period of July 1, 2003 through December 31, 2011. On July 22, 2014, the Commissioner denied the j2 Global affiliate’s application for abatement. On September 18, 2014, the j2 Global affiliate petitioned the Massachusetts Appellate Tax Board for abatement of the tax asserted in the notice of assessment (No. C325426). Discovery is ongoing.
	On January 18, 2013, Paldo Sign and Display Co. (“Paldo”) filed an amended complaint adding two j2 Global affiliates and a former employee as additional defendants in an existing purported class action pending in the U.S. District Court for the Northern District of Illinois (“Northern District of Illinois”) (No. 1:13-cv-01896). The amended complaint alleged violations of the Telephone Consumer Protection Act (“TCPA”), the Illinois Consumer Fraud and Deceptive Business Practices Act (“ICFA”), and common law conversion, arising from an indirect customer’s alleged use of the j2 Global affiliates’ systems to send unsolicited facsimile transmissions. On August 23, 2013, a second plaintiff, Sabon, Inc. , was added. The j2 Global affiliates filed a motion to dismiss the ICFA and conversion claims, which was granted. The Northern District of Illinois also dismissed the former employee for lack of personal jurisdiction. Discovery is ongoing.
	On August 28, 2013, Phyllis A. Huster (“Huster”) filed suit in the Northern District of Illinois (No. 1:13-cv-06143) against two j2 Global affiliates and three other parties for correction of inventorship for nine j2 Global patents. Huster seeks, among other things, a declaration that she was an inventor of the patents-in-suit, an order directing the U.S. Patent & Trademark Office to substitute or add her as an inventor, and payment of at least half of defendants’ earnings from licensing the patents-in-suit. On September 19, 2014, the Northern District of Illinois granted the defendants’ motion to dismiss for improper venue and transferred the case to the Northern District of Georgia (No. 1:14-cv-03304). Huster filed an amended complaint on February 11, 2015, which she corrected on February 12, 2015. The corrected amended complaint added claims of fraudulent concealment, breach of fiduciary duty, unjust enrichment, breach of contract, breach of a private duty, conversion, and breach of the implied covenant of good faith and fair dealing. Huster also filed a motion to disqualify various law firms from continuing to represent the defendants. In addition, defendants filed several motions to dismiss on March 12, 2015, including three by j2 Global affiliates. These motions remain pending.
	On October 16, 2013, a j2 Global affiliate entered an appearance as a plaintiff in a multi-district litigation pending in the Northern District of Illinois (No. 1:12-cv-06286). In this litigation, Unified Messaging Solutions, LLC (“UMS”), a company with rights to assert certain patents owned by the j2 Global affiliate, has asserted five j2 Global patents against a number of defendants. While claims against some defendants have been settled, other defendants have filed counterclaims for, among other things, non-infringement, unenforceability, and invalidity of the patents-in-suit. On December 20, 2013, the Northern District of Illinois issued a claim construction opinion and, on June 13, 2014, entered a final judgment of non-infringement for the remaining defendants based on that claim construction. UMS and the j2 Global affiliate filed a notice of appeal to the U.S. Court of Appeals for the Federal Circuit on June 27, 2014 (No. 14-1611). Briefing on the appeal has been stayed, pending the Northern District of Illinois’s resolution of the defendants’ motion to declare the case exceptional.
	On February 19, 2014, two j2 Global affiliates filed suit in the Central District of California (No. 2:14-cv-01283) against RPost Holdings, Inc. and two of its affiliates (collectively, “RPost”), alleging infringement of two j2 Global patents and seeking a declaration of non-infringement and invalidity of nine RPost patents that had been asserted against the j2 Global affiliates in a patent assertion letter from RPost. An amended complaint was filed on June 20, 2014, adding an additional j2 Global affiliate as a plaintiff. RPost filed an answer to the complaint on July 14, 2014, asserting counterclaims of infringement for the nine RPost patents against the Campaigner® service. On April 27, 2015, the Central District of California granted the j2 Global affiliates’ motion to stay the litigation pending the resolution of a separate lawsuit, which does not directly involve j2 Global or its affiliates but does address RPost’s ownership of and right to assert the RPost patents-in-suit.
	On June 23, 2014, Andre Free-Vychine (“Free-Vychine”) filed a purported class action against a j2 Global affiliate in the Superior Court for the State of California, County of Los Angeles (“Los Angeles Superior Court”). The complaint alleges two California statutory violations relating to late fees levied in certain eVoice® accounts. Free-Vychine is seeking, among other things, damages and injunctive relief on behalf of himself and a purported nationwide class of similarly situated persons. On August 26, 2014, Law Enforcement Officers, Inc. and IV Pit Stop, Inc. (“IV Pit Stop”) filed a separate purported class action against the same j2 Global affiliate in Los Angeles Superior Court. The complaint alleges three California statutory violations, negligence, breach of the implied covenant of good faith and fair dealing, and various other common law claims relating to late fees levied on any of the j2 Global affiliate’s customers, including those with eVoice® and Onebox® accounts. The plaintiffs are seeking, among other things, damages and injunctive relief on behalf of themselves and a purported nationwide class of similarly situated persons. On September 29, 2014, the Los Angeles Superior Court ordered both cases related and consolidated for discovery purposes. On March 13, 2015, a third amended complaint was filed in this action, which no longer included IV Pit Stop as a plaintiff but added Christopher Dancel as a plaintiff. Discovery is ongoing.
	j2 Global does not believe, based on current knowledge, that the foregoing legal proceedings or claims, including those where an unfavorable outcome is reasonably possible, after giving effect to existing reserves, are likely to have a material adverse effect on the Company’s consolidated financial position, results of operations, or cash flows. However, depending on the amount and the timing, an unfavorable resolution of some or all of these matters could materially affect j2 Global’s consolidated financial position, results of operations, or cash flows in a particular period. The Company has not accrued for a loss contingency relating to these legal proceedings because unfavorable outcomes are not considered by management to be probable.
	Non-Income Related Taxes
	As a provider of cloud services for business, the Company does not provide telecommunications services. Thus, it believes that its business and its users (by using our services) are not subject to various telecommunication taxes. Moreover, the Company does not believe that its business and its users (by using our services) are subject to other indirect taxes, such as sales and use tax, value added tax , goods and services tax, business tax and gross receipt tax. However, several state and municipal taxing authorities have challenged these beliefs and have and may continue to audit and assess our business and operations with respect to telecommunications and other indirect taxes.
	The current U.S. federal government moratorium on states and other local authorities imposing access or discriminatory taxes on the Internet, which is set to expire October 1, 2015, does not prohibit federal, state or local authorities from collecting taxes on our income or from collecting taxes that are due under existing tax rules.
	The Company is currently under audit for indirect taxes in several states and municipalities. The Company currently has no reserves established for these matters, as the Company has determined that the liability is not probable and estimable. However, it is reasonably possible that such a liability could be incurred, which would result in additional expense, which could materially impact our financial results.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The Company’s tax provision for interim periods is determined using an estimate of the Company’s annual effective tax rate. Each quarter the Company updates its estimated annual effective tax rate and, if the estimate changes, makes a cumulative adjustment. j2 Global’s annual effective tax rate is normally lower than the 35% U.S. federal statutory rate and applicable apportioned state tax rates primarily due to anticipated earnings of the Company’s subsidiaries outside of the U.S. in jurisdictions where the Company’s effective tax rate is lower than in the U.S. For the quarter ended March 31, 2015, the effective tax rate was 29.4%.  j2 Global does not provide for U.S. income taxes on the undistributed earnings of the Company’s foreign operations because the Company intends to permanently reinvest such earnings in foreign jurisdictions and any determination of the amount of unrecognized deferred tax liability related to these earnings is not practicable.  Income before income taxes included income from domestic operations of $11.6 million and $11.6 million for the three months ended March 31, 2015 and 2014, respectively, and income from foreign operations of $19.4 million and $25.4 million for the three months ended March 31, 2015 and 2014, respectively.
	As of March 31, 2015 and December 31, 2014, the Company had $40.1 million and $37.6 million, respectively, in liabilities for uncertain income tax positions. Accrued interest and penalties related to unrecognized tax benefits are recognized in income tax expense on the Company’s consolidated statement of income.
	Cash paid for income taxes net of refunds received was $8.1 million for the three months ended March 31, 2015.
	Certain taxes are prepaid during the year and included within prepaid expenses and other current assets on the consolidated balance sheet. The Company’s prepaid taxes were $10.5 million and $5.8 million at March 31, 2015 and December 31, 2014, respectively.
	Income Tax Audits:
	The Company is under income tax audit by the U.S. Internal Revenue Service ("IRS") for tax years 2009 through 2011. The Company has appealed the IRS tax examiner's decision regarding transfer pricing for tax years 2009 and 2010 to the IRS appeals office (see Note 17 - Subsequent Events for further discussion).
	j2 Global is currently under income tax audit by the California Franchise Tax Board for tax years 2009 through 2011, by the New York City Department of Finance for tax years 2009 through 2011 and by the Canada Revenue Agency for tax years 2010 through 2011. We were notified by the Illinois Department of Revenue that the income tax audit for tax years 2008 and 2009 had been concluded with no changes.
	It is reasonably possible that these audits may conclude in the next 12 months (see Note 17 - Subsequent Events for further discussion) and that the uncertain tax positions the Company has recorded in relation to these tax years may change compared to the liabilities recorded for these periods. If the recorded uncertain tax positions are inadequate to cover the associated tax liabilities, the Company would be required to record additional tax expense in the relevant period, which could be material. If the recorded uncertain tax positions are adequate to cover the associated tax liabilities, the Company would be required to record any excess as reduction in tax expense in the relevant period, which could be material. However, it is not currently possible to estimate the amount, if any, of such change.

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2015
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity
	Common Stock Repurchase Program
	In February 2012, the Company’s Board of Directors approved a program authorizing the repurchase of up to five million shares of our common stock through February 20, 2013 (the "2012 Program") which was subsequently extended through February 19, 2016. During the three month period ended March 31, 2015, no shares were repurchased under this program. Cumulatively at March 31, 2015, 2.1 million shares were repurchased at an aggregate cost of $58.6 million (including an immaterial amount of commission fees).
	Periodically, participants in j2 Global’s stock plans surrender to the Company shares of j2 Global stock to pay the exercise price or to satisfy tax withholding obligations arising upon the exercise of stock options or the vesting of restricted stock. During the three month period ended March 31, 2015, the Company purchased 11,678 shares from plan participants for this purpose.
	Dividends
	The following is a summary of each dividend declared during fiscal year 2015:
	Declaration Date	Dividend per Common Share		Record Date	Payment Date
	February 10, 2015	$	0.2925	February 23, 2015	March 9, 2015
	Future dividends are subject to Board approval.

Stock_Options_And_Employee_Sto

Stock Options And Employee Stock Purchase Plan	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Options And Employee Stock Purchase Plan	Stock Options and Employee Stock Purchase Plan
	j2 Global’s share-based compensation plans include the Second Amended and Restated 1997 Stock Option Plan (the “1997 Plan”), 2007 Stock Plan (the “2007 Plan”) and 2001 Employee Stock Purchase Plan (the “Purchase Plan”). Each plan is described below.
	The 1997 Plan terminated in 2007. A total of 12,000,000 shares of common stock were authorized to be used for 1997 Plan purposes. An additional 840,000 shares were authorized for issuance upon exercise of options granted outside the 1997 Plan. As of March 31, 2015, 222,706 shares underlying options and zero shares of restricted stock were outstanding under the 1997 Plan, all of which continue to be governed by the 1997 Plan.
	The 2007 Plan provides for the grant of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock, restricted stock units and other share-based awards. 4,500,000 shares of common stock are authorized to be used for 2007 Plan purposes. Options under the 2007 Plan may be granted at exercise prices determined by the Board of Directors, provided that the exercise prices shall not be less than the fair market value of j2 Global’s common stock on the date of grant for incentive stock options and not less than 85% of the fair market value of j2 Global’s common stock on the date of grant for non-statutory stock options. As of March 31, 2015, 500,143 shares underlying options and 106,924 shares of restricted stock were outstanding under the 2007 Plan.
	All stock option grants are approved by “outside directors” within the meaning of Internal Revenue Code Section 162(m).
	Stock Options
	The following table represents stock option activity for the three months ended March 31, 2015:
		Number of		Weighted-				Weighted-Average	Aggregate
		Shares		Average				Remaining	Intrinsic
				Exercise				Contractual	Value
				Price				Term (in years)
	Outstanding at January 1, 2015	725,649		$	24.29
	Granted	—		—
	Exercised	(2,800	)	23.11
	Canceled	—		—
	Outstanding at March 31, 2015	722,849		24.3				3.6	$	29,913,357
	Exercisable at March 31, 2015	625,639		23.85				3.2	$	26,170,104
	Vested and expected to vest at March 31, 2015	714,217		$	24.25			3.6	$	29,589,392
	The aggregate intrinsic values of options exercised during the three months ended March 31, 2015 and 2014 were $0.1 million and $12.3 million, respectively.
	As of March 31, 2015 and December 31, 2014, unrecognized stock compensation related to non-vested stock options granted under the 1997 Plan and the 2007 Plan approximated $0.6 million and $0.8 million, respectively. Unrecognized stock compensation expense related to non-vested stock options granted under these plans is expected to be recognized ratably over a weighted-average period of 1.1 years (i.e., the remaining requisite service period).
	Fair Value Disclosure
	j2 Global uses the Black-Scholes option pricing model to calculate the fair value of each option grant. The expected volatility for the three months ended March 31, 2015 is based on historical volatility of the Company’s common stock. The Company estimates the expected term based upon the historical exercise behavior of our employees. The risk-free interest rate is based on U.S. Treasury zero-coupon issues with a term equal to the expected term of the option assumed at the date of grant. The Company uses an annualized dividend yield based upon the per share dividends declared by its Board of Directors. Estimated forfeiture rates were 12.47% and 11.07% as of March 31, 2015 and 2014, respectively.
	Restricted Stock
	j2 Global has awarded restricted stock and restricted stock units to its Board of Directors and senior staff pursuant to the 1997 Plan and the 2007 Plan. Compensation expense resulting from restricted stock and restricted unit grants is measured at fair value on the date of grant and is recognized as share-based compensation expense over the applicable vesting period. Beginning in fiscal year 2012, vesting periods are approximately one year for awards to members of the Company's Board of Directors and five years for senior staff. The Company recognized $3.0 million and $1.9 million of compensation expense for the three months ended March 31, 2015 and 2014, respectively, related to restricted stock and restricted stock units. As of March 31, 2015 and December 31, 2014, the Company had unrecognized share-based compensation cost of approximately $28.5 million and $24.1 million, respectively, associated with these awards. This cost is expected to be recognized over a weighted-average period of 2.9 years for awards and 3.5 years for units.
	Restricted stock award activity for the three months ended March 31, 2015 is set forth below:
		Shares		Weighted-Average
				Grant-Date
				Fair Value
	Nonvested at January 1, 2015	814,050		$	26.57
	Granted	24,000		59.86
	Vested	(29,442	)	32.67
	Canceled	(24,546	)	26.35
	Nonvested at March 31, 2015	784,062		$	27.36
	Restricted stock unit award activity for the three months ended March 31, 2015 is set forth below:
		Number of		Weighted-Average		Aggregate
		Shares		Remaining		Intrinsic
				Contractual		Value
				Term (in years)
	Outstanding at January 1, 2015	102,294
	Granted	8,000
	Vested	(4,000	)
	Canceled	—
	Outstanding at March 31, 2015	106,294		2		$	7,022,768
	Vested and expected to vest at March 31, 2015	82,906		1.8		$	5,445,291
	Share-Based Compensation Expense
	The following table represents share-based compensation expense included in cost of revenues and operating expenses in the accompanying condensed consolidated statements of income for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended March 31,
		2015			2014
	Cost of revenues	$	83		$	154
	Operating expenses:
	Sales and marketing	584			491
	Research, development and engineering	194			140
	General and administrative	2,143			1,599
	Total	$	3,004		$	2,384
	Employee Stock Purchase Plan
	The Purchase Plan provides for the issuance of a maximum of two million shares of the Company's common stock. Under the Purchase Plan, eligible employees can have up to 15% of their earnings withheld, up to certain maximums, to be used to purchase shares of j2 Global’s common stock at certain plan-defined dates. The price of the common stock purchased under the Purchase Plan for the offering periods is equal to 95% of the fair market value of the common stock at the end of the offering period. For the three months ended March 31, 2015 and 2014, 1,114 and 1,270 shares were purchased under the plan, respectively. Cash received upon the issuance of common stock under the Purchase Plan was $61,000 and $55,000 for the three months ended March 31, 2015 and 2014, respectively. As of March 31, 2015, 1,633,350 shares were available under the Purchase Plan for future issuance.

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share Reconciliation [Abstract]
Earnings Per Share	Earnings Per Share
	The components of basic and diluted earnings per share are as follows (in thousands, except share and per share data):
		Three Months Ended March 31,
		2015			2014
	Numerator for basic and diluted net income per common share:
	Net income attributable to j2 Global, Inc. common shareholders	$	21,877		$	28,765
	Net income available to participating securities (a)	(360		)	(635		)
	Net income available to j2 Global, Inc. common shareholders	$	21,517		$	28,130
	Denominator:
	Weighted-average outstanding shares of common stock	47,422,396			46,365,158
	Dilutive effect of:
	Equity incentive plans	343,692			400,574
	Common stock and common stock equivalents	47,766,088			46,765,732
	Net income per share:
	Basic	$	0.45		$	0.61
	Diluted	$	0.45		$	0.6
	(a)	Represents unvested restricted stock awards that contain certain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid).
	For the three months ended March 31, 2015 and 2014, zero options were outstanding with exercise prices greater than the average market price of the common shares so none were excluded from the computation of diluted earnings per share for such periods.

Segment_and_Geographic_Informa

Segment and Geographic Information	3 Months Ended
	Mar. 31, 2015
Segments, Geographical Areas [Abstract]
Segment and Geographic Information	Segment Information
	The Company's business segments are based on the organization structure used by management for making operating and investment decisions and for assessing performance. j2 Global's reportable business segments are: (i) Business Cloud Services and (ii) Digital Media. Segment accounting policies are the same as described in Note 1 - Basis of Presentation.
	Information on reportable segments and reconciliation to consolidated income from operations is presented below (in thousands):
		Three Months Ended March 31,
		2015			2014
	Revenues by segment:
	Business Cloud Services	$	118,061		$	100,830
	Digital Media	43,257			33,368
	Elimination of inter-segment revenues	(65		)	(74		)
	Total revenues	161,253			134,124
	Direct costs by segment(1):
	Business Cloud Services	71,043			55,612
	Digital Media	39,089			28,716
	Direct costs by segment(1):	110,132			84,328
	Business Cloud Services operating income	47,018			45,218
	Digital Media operating income	4,168			4,652
	Segment operating income	51,186			49,870
	Global operating costs(2)	10,656			8,285
	Income from operations	$	40,530		$	41,585
	(1) Direct costs for each segment include cost of revenues and other operating expenses that are directly attributable to the segment, such as employee compensation expense, local sales and marketing expenses, engineering and network operations expense, depreciation and amortization and other administrative expenses.
	(2) Global operating costs include general and administrative and other corporate expenses that are managed on a global basis and that are not directly attributable to any particular segment.
		March 31, 2015			December 31, 2014
	Assets:
	Business Cloud Services	$	918,180		$	883,587
	Digital Media	372,757			378,381
	Total assets from reportable segments	1,290,937			1,261,968
	Corporate	407,299			443,234
	Total assets	$	1,698,236		$	1,705,202
		Three Months Ended March 31,
		2015			2014
	Capital expenditures:
	Business Cloud Services	$	1,280		$	1,875
	Digital Media	1,622			956
	Total from reportable segments	2,902			2,831
	Corporate	54			105
	Total capital expenditures	$	2,956		$	2,936
		Three Months Ended March 31,
		2015			2014
	Depreciation and amortization:
	Business Cloud Services	$	14,013		$	8,030
	Digital Media	7,080			4,918
	Total from reportable segments	21,093			12,948
	Corporate	194			189
	Total depreciation and amortization	$	21,287		$	13,137
	j2 Global maintains operations in the U.S., Canada, Ireland, Japan and other countries. Geographic information about the U.S. and all other countries for the reporting periods is presented below. Such information attributes revenues based on jurisdictions where revenues are reported (in thousands).
		Three Months Ended March 31,
		2015			2014
	Revenues:
	United States	$	109,032		$	91,428
	Canada	18,139			17,508
	Ireland	9,935			10,511
	All other countries	24,147			14,677
		$	161,253		$	134,124
		March 31,			December 31,
		2015			2014
	Long-lived assets:
	United States	$	227,561		$	216,099
	All other countries	105,541			101,107
	Total	$	333,102		$	317,206

Unrestricted_Subsidiaries_Note

Unrestricted Subsidiaries (Notes)	3 Months Ended
	Mar. 31, 2015
Unrestricted Subsidiaires [Abstract]
Unrestricted Subsidiaries [Text Block]	Unrestricted Subsidiaries
	As of March 31, 2015, the Company's Board of Directors had designated the following entities as “Unrestricted Subsidiaries” under the indenture governing j2 Cloud Services' Senior Notes:
	Ziff Davis, LLC and subsidiaries
	Advanced Messaging Technologies, Inc. and subsidiaries
	The financial position and results of operations of these Unrestricted Subsidiaries are included in the Company's condensed consolidated financial statements.
	As required by the indenture governing j2 Cloud Services' Senior Notes, information sufficient to ascertain the financial condition and results of operations excluding the Unrestricted Subsidiaries must be presented. Accordingly, the Company is presenting the following tables.
	The financial position of the Unrestricted Subsidiaries as of March 31, 2015 and December 31, 2014 is as follows (in thousands):
		March 31, 2015			December 31, 2014
	ASSETS
	Cash and cash equivalents	$	39,314		$	27,944
	Accounts receivable	49,837			57,005
	Prepaid expenses and other current assets	3,527			2,986
	Deferred income taxes	5,817			5,292
	Total current assets	98,495			93,227
	Property and equipment, net	13,061			12,834
	Trade names, net	68,626			70,310
	Patent and patent licenses, net	22,088			24,007
	Customer relationships, net	52,781			55,925
	Goodwill	241,388			245,613
	Other purchased intangibles, net	7,899			8,901
	Other assets	1,639			1,706
	Total assets	$	505,977		$	512,523
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	$	35,634		$	40,296
	Income taxes payable	—			316
	Deferred revenue, current	6,086			5,277
	Total current liabilities	41,720			45,889
	Long-term debt	110,000			110,000
	Deferred income taxes	18,253			17,397
	Other long-term liabilities	13,638			16,243
	Total liabilities	183,611			189,529
	Additional paid-in capital	315,427			317,932
	Retained Earnings	7,478			6,051
	Accumulated other comprehensive income (loss)	(539		)	(989		)
	Total stockholders’ equity	322,366			322,994
	Total liabilities and stockholders’ equity	$	505,977		$	512,523
	The results of operations of the Unrestricted Subsidiaries for the three months ended March 31, 2015 and 2014 is as follows (in thousands):
		Three Months Ended March 31,
		2015 (1)			2014
	Revenues	$	44,420		$	33,368
	Cost of revenues	4,354			3,852
	Gross profit	40,066			29,516
	Operating expenses:
	Sales and marketing	17,662			14,958
	Research, development and engineering	1,901			1,072
	General and administrative	17,979			8,834
	Total operating expenses	37,542			24,864
	Income from operations	2,524			4,652
	Interest expense (income), net	2,517			1
	Other expense (income), net	243			(342		)
	Income (loss) before income taxes	(236		)	4,993
	Income tax expense	319			2,027
	Net income (loss)	$	(555	)	$	2,966
	(1) Effective in the second quarter of 2014, Advanced Messaging Technologies, Inc. and subsidiaries were classified as Unrestricted Subsidiaries. As a result, the prior period may not be comparable to the current period presentation.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income (Notes)	3 Months Ended
	Mar. 31, 2015
Accumulated Other Comprehensive Income [Abstract]
Comprehensive Income (Loss) Note [Text Block]	Accumulated Other Comprehensive Income
	The following table summarizes the changes in accumulated balances of other comprehensive income, net of tax, for the three months ended March 31, 2015 (in thousands):
		Unrealized Gains (Losses) on Investments				Foreign Currency Translation			Total
	Beginning balance	$	9,388			$	(16,515	)	$	(7,127	)
	Other comprehensive (loss) income before reclassifications	387				(15,237		)	(14,850		)
	Amounts reclassified from accumulated other comprehensive income	(7		)		—			(7		)
	Net current period other comprehensive (loss) income	380				(15,237		)	(14,857		)
	Ending balance	$	9,768			$	(31,752	)	$	(21,984	)
	The following table provides details about reclassifications out of accumulated other comprehensive income for the three months ended March 31, 2015 (in thousands):
	Details about Accumulated Other Comprehensive Income Components		Amount Reclassified from Accumulated Other Comprehensive Income				Affected Line Item in the Statement of Income
			Three Months Ended March 31, 2015
	Unrealized gain on available-for-sale investments		$	(11	)		Other expense (income), net
			(11		)		Total, before income taxes
			4				Income tax expense (benefit)
			(7		)		Total, net of tax
	Total reclassifications for the period		$	(7	)		Total, net of tax

Condensed_Consolidating_Financ

Condensed Consolidating Financials (Notes)	3 Months Ended
	Mar. 31, 2015
Condensed Financial Information [Abstract]
Condensed Financial Statements [Text Block]	Condensed Consolidating Financial Statements
	In connection with the June 2014 Convertible Note issuance, j2 Global, Inc. entered into a supplemental indenture related to the Senior Notes, pursuant to which it fully and unconditionally guaranteed, on an unsecured basis, the full and punctual payment of the Senior Notes issued by its wholly owned subsidiary, j2 Cloud Services, Inc. j2 Cloud Services, Inc. is subject to restrictions on dividends in its existing indenture with respect to the Senior Notes and the credit facility with Union Bank. While substantially all of the Company’s assets (other than the net cash proceeds from the issuance of the Convertible Notes) are owned directly or indirectly by j2 Cloud Services, Inc., those contractual provisions do not meaningfully restrict j2 Cloud Services, Inc.’s ability to pay dividends to j2 Global, Inc.
	The following condensed consolidating financial statements present, in separate columns, financial information for (i) j2 Global, Inc. (the “Parent”) on a parent-only basis, (ii) j2 Cloud Services, Inc., (iii) the non-guarantor subsidiaries on a combined basis, (iv) the eliminations and reclassifications necessary to arrive at the information for the Company on a consolidated basis, and (v) the Company on a consolidated basis. The condensed consolidating financial statements are presented in accordance with the equity method. Under this method, the investments in subsidiaries are recorded at cost and adjusted for the Company’s share of subsidiaries’ cumulative results of operations, capital contributions, distributions and other equity changes. Intercompany charges (income) between the Parent and subsidiaries are recognized in the condensed consolidating financial statements during the period incurred and the settlement of intercompany balances is reflected in the condensed consolidating statement of cash flows based on the nature of the underlying transactions. Consolidating adjustments include consolidating and eliminating entries for investments in subsidiaries, intercompany activity and balances.
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONDENSED CONSOLIDATED BALANCE SHEET
	(Unaudited, in thousands except share and per share data)
		31-Mar-15
	BALANCE SHEET	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	ASSETS
	Cash and cash equivalents	$	199,815		$	17,516		$	174,686		$	—		$	392,017
	Short-term investments	41,880			43,819			60			—			85,759
	Accounts receivable, net	326			12,059			70,187			—			82,572
	Prepaid expenses and other current assets	737			14,472			9,505			(103		)	24,611
	Deferred income taxes	896			—			1,250			—			2,146
	Intercompany receivable	110,000			91,474			—			(201,474		)	—
	Total current assets	353,654			179,340			255,688			(201,577		)	587,105
	Long-term investments	52,619			9,099			—			—			61,718
	Property and equipment, net	—			7,567			29,051			—			36,618
	Trade names, net	—			10,199			95,655			—			105,854
	Patent and patent licenses, net	—			850			22,118			—			22,968
	Customer relationships, net	—			1,952			182,376			—			184,328
	Goodwill	—			52,131			617,243			—			669,374
	Other purchased intangibles, net	—			4,264			11,882			—			16,146
	Investment in subsidiaries	839,108			909,081			8,717			(1,756,906		)	—
	Other assets	9,061			3,063			2,001			—			14,125
	Total assets	$	1,254,442		$	1,177,546		$	1,224,731		$	(1,958,483	)	$	1,698,236
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	$	4,798		$	23,185		$	53,025		$	—		$	81,008
	Income taxes payable	2,959			103			—			(103		)	2,959
	Deferred revenue, current	—			20,774			52,504			—			73,278
	Capital lease, current	—			—			441			—			441
	Deferred income taxes	43			—			142			—			185
	Intercompany payable	48,268			—			153,206			(201,474		)	—
	Total current liabilities	56,068			44,062			259,318			(201,577		)	157,871
	Long term debt	348,942			246,324			—			—			595,266
	Capital lease, non-current	—			—			66			—			66
	Liability for uncertain tax positions	—			40,145			—			—			40,145
	Deferred income taxes	24,685			—			38,424			—			63,109
	Deferred revenue, non-current	—			7,009			1,896			—			8,905
	Other long-term liabilities	1,071			898			15,946			—			17,915
	Total liabilities	430,766			338,438			315,650			(201,577		)	883,277
	Common stock, $0.01 par value.	474			—			—			—			474
	Additional paid-in capital - common	275,420			233,836			421,684			(655,520		)	275,420
	Retained earnings	547,697			595,691			519,047			(1,101,386		)	561,049
	Accumulated other comprehensive loss	85			9,581			(31,650		)	—			(21,984		)
	Total stockholders’ equity	823,676			839,108			909,081			(1,756,906		)	814,959
	Total liabilities and stockholders’ equity	$	1,254,442		$	1,177,546		$	1,224,731		$	(1,958,483	)	$	1,698,236
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONDENSED CONSOLIDATED BALANCE SHEET
	(Unaudited, in thousands except share and per share data)
		31-Dec-14
	BALANCE SHEET	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	ASSETS
	Cash and cash equivalents	$	226,790		$	36,810		$	170,063		$	—		$	433,663
	Short-term investments	47,880			48,261			65			—			96,206
	Accounts receivable, net	—			11,167			80,532			—			91,699
	Prepaid expenses and other current assets	776			12,689			9,137			—			22,602
	Deferred income taxes	1,271			—			742			—			2,013
	Intercompany receivable	110,000			74,938			1,428			(186,366		)	—
	Total current assets	386,717			183,865			261,967			(186,366		)	646,183
	Long-term investments	55,452			5,056			—			—			60,508
	Property and equipment, net	—			8,011			30,206			—			38,217
	Trade names, net	—			10,231			95,320			—			105,551
	Patent and patent licenses, net	—			886			24,041			—			24,927
Customer relationships, net	—			2,206			161,560			—			163,766
Goodwill	—			52,131			583,544			—			635,675
Other purchased intangibles, net	—			4,276			13,280			—			17,556
Investment in subsidiaries	826,289			900,681			8,716			(1,735,686		)	—
Other assets	9,328			1,368			2,123			—			12,819
Total assets	$	1,277,786		$	1,168,711		$	1,180,757		$	(1,922,052	)	$	1,705,202
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable and accrued expenses	$	2,834		$	28,414		$	64,062		$	—		$	95,310
Income taxes payable	—			—			—			—			—
Deferred revenue, current	—			23,091			40,366			—			63,457
Capital lease, current	—			—			258			—			258
Deferred income taxes	—			—			342			—			342
Intercompany payable	76,366			—			110,000			(186,366		)	—
Total current liabilities	79,200			51,505			215,028			(186,366		)	159,367
Long term debt	347,163			246,187			—			—			593,350
Capital lease, non-current	—			—			141			—			141
Liability for uncertain tax positions	—			37,551			—			—			37,551
Deferred income taxes	21,728			(1,837		)	42,069			—			61,960
Deferred revenue, non-current	—			8,187			1,995			—			10,182
Other long-term liabilities	744			829			20,843			—			22,416
Total liabilities	448,835			342,422			280,076			(186,366		)	884,967
Common stock, $0.01 par value	474			—			—			—			474
Additional paid-in capital - common	273,304			232,340			421,676			(654,016		)	273,304
Retained earnings	555,158			584,591			495,505			(1,081,670		)	553,584
Accumulated other comprehensive loss	15			9,358			(16,500		)	—			(7,127		)
Total stockholders’ equity	828,951			826,289			900,681			(1,735,686		)	820,235
Total liabilities and stockholders’ equity	$	1,277,786		$	1,168,711		$	1,180,757		$	(1,922,052	)	$	1,705,202
j2 GLOBAL, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENT OF INCOME
(Unaudited, in thousands except share and per share data)
	Three Months Ended March 31, 2015
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	54,619		$	116,435		$	(9,801	)	$	161,253
Cost of revenues	—			15,528			22,394			(9,736		)	28,186
Gross profit	—			39,091			94,041			(65		)	133,067
Operating expenses:
Sales and marketing	—			9,780			27,875			(65		)	37,590
Research, development and engineering	—			3,855			4,592			—			8,447
General and administrative	4,179			6,850			35,471			—			46,500
Total operating expenses	4,179			20,485			67,938			(65		)	92,537
Operating income	(4,179		)	18,606			26,103			—			40,530
Equity earnings in subsidiaries	26,251			23,539			—			(49,790		)	—
Interest expense (income), net	2,588			5,107			2,618			—			10,313
Other expense (income), net	(12		)	339			(1,111		)	—			(784		)
Income before income taxes	19,496			36,699			24,596			(49,790		)	31,001
Income tax expense	(2,381		)	10,448			1,057			—			9,124
Net income	$	21,877		$	26,251		$	23,539		$	(49,790	)	$	21,877
j2 GLOBAL, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENT OF INCOME
(Unaudited, in thousands except share and per share data)
	Three Months Ended March 31, 2014
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	51,193		$	96,634		$	(13,703	)	$	134,124
Cost of revenues	—			19,953			17,065			(13,630		)	23,388
Gross profit	—			31,240			79,569			(73		)	110,736
Operating expenses:
Sales and marketing	—			9,013			24,019			(73		)	32,959
Research, development and engineering	—			3,620			3,593			—			7,213
General and administrative	—			9,570			19,409			—			28,979
Total operating expenses	—			22,203			47,021			(73		)	69,151
Operating income	—			9,037			32,548			—			41,585
Equity earnings in subsidiaries	—			27,942			—			(27,942		)	—
Interest expense (income), net	—			5,103			(155		)	—			4,948
Other expense (income), net	—			(32		)	(287		)	—			(319		)
Income before income taxes	—			31,908			32,990			(27,942		)	36,956
Income tax expense	—			3,143			5,048			—			8,191
Net income	$	—		$	28,765		$	27,942		$	(27,942	)	$	28,765
j2 GLOBAL, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
(Unaudited, in thousands except share and per share data)
	Three Months Ended March 31, 2015
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	21,877		$	26,251		$	23,539		$	(49,790	)	$	21,877
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			—			(15,237		)	—			(15,237		)
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	311			69			—			—			380
Other comprehensive income (loss), net of tax	311			69			(15,237		)	—			(14,857		)
Comprehensive income	$	22,188		$	26,320		$	8,302		$	(49,790	)	$	7,020
j2 GLOBAL, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
(Unaudited, in thousands except share and per share data)
	Three Months Ended March 31, 2014
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	—		$	28,765		$	27,942		$	(27,942	)	$	28,765
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			(248		)	1,085			—			837
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			(2,649		)	9			—			(2,640		)
Other comprehensive income (loss), net of tax	—			(2,897		)	1,094			—			(1,803		)
Comprehensive income	$	—		$	25,868		$	29,036		$	(27,942	)	$	26,962
j2 GLOBAL, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENT OF CASH FLOW
(Unaudited, in thousands except share and per share data)
	Three Months Ended March 31, 2015
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net cash (used in) provided by operating activities	$	(8,106	)	$	6,745		$	47,077		$	—		$	45,716
Cash flows from investing activities:
Maturity of available-for-sale investments	21,994			7,000			—			—			28,994
Purchase of available-for-sale investments	(13,276		)	(6,543		)	—			—			(19,819		)
Purchases of property and equipment	—			(308		)	(2,648		)	—			(2,956		)
Acquisition of businesses, net of cash received	—			1,459			(73,674		)	—			(72,215		)
Purchases of intangible assets	—			(5		)	(322		)	—			(327		)
Investment in subsidiaries	—			—			—			—			—
Net cash (used in) provided by investing activities	8,718			1,603			(76,644		)	—			(66,323		)
Cash flows from financing activities:
Repurchases of common and restricted stock	(705		)	—			—			—			(705		)
Issuance of common stock under employee stock purchase plan	61			—			—			—			61
Exercise of stock options	65			—			—			—			65
Dividends paid	(14,110		)	—			—			—			(14,110		)
Excess tax benefits from share-based compensation	334			—			—			—			334
Deferred payments for acquisitions	—			(544		)	(1,812		)	—			(2,356		)
Other	—			—			(50		)	—			(50		)
Intercompany	(13,232		)	(27,098		)	40,330			—			—
Net cash (used in) provided by financing activities	(27,587		)	(27,642		)	38,468			—			(16,761		)
Effect of exchange rate changes on cash and cash equivalents	—			—			(4,278		)	—			(4,278		)
Net change in cash and cash equivalents	(26,975		)	(19,294		)	4,623			—			(41,646		)
Cash and cash equivalents at beginning of period	226,790			36,810			170,063			—			433,663
Cash and cash equivalents at end of period	$	199,815		$	17,516		$	174,686		$	—		$	392,017
j2 GLOBAL, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENT OF CASH FLOW
(Unaudited, in thousands except share and per share data)
	Three Months Ended March 31, 2014
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net cash provided by operating activities	$	—		$	(3,119	)	$	40,413		$	—		$	37,294
Cash flows from investing activities:
Maturity of certificates of deposit	—			8,210			—			—			8,210
Maturity of available-for-sale investments	—			24,105			5,600			—			29,705
Purchase of available-for-sale investments	—			(11,213		)	—			—			(11,213		)
Purchases of property and equipment	—			(454		)	(2,482		)	—			(2,936		)
Acquisition of businesses, net of cash received	—			—			(49,068		)	—			(49,068		)
Purchases of intangible assets	—			(591		)	(324		)	—			(915		)
Investment in subsidiaries	—			(1,021		)	1,021			—			—
Net cash (used in) provided by investing activities	—			19,036			(45,253		)	—			(26,217		)
Cash flows from financing activities:
Repurchases of common stock and restricted stock	—			(4,042		)	—			—			(4,042		)
Issuance of common stock under employee stock purchase plan	—			55			—			—			55
Exercise of stock options	—			4,926			—			—			4,926
Dividends paid	—			(12,418		)	—			—			(12,418		)
Excess tax benefits from share-based compensation	—			4,082			—			—			4,082
Deferred payments for acquisitions	—			—			(3,314		)	—			(3,314		)
Other	—			—			—			—			—
Intercompany	—			2,335			(2,335		)	—			—
Net cash (used in) provided by financing activities	—			(5,062		)	(5,649		)	—			(10,711		)
Effect of exchange rate changes on cash and cash equivalents	—			—			(99		)	—			(99		)
Net change in cash and cash equivalents	—			10,855			(10,588		)	—			267
Cash and cash equivalents at beginning of period	—			34,406			173,395			—			207,801
Cash and cash equivalents at end of period	$	—		$	45,261		$	162,807		$	—		$	208,068

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events
	On May 6, 2015, the Company's Board of Directors approved a quarterly cash dividend of $0.3000 per share of common stock payable on June 3, 2015 to all stockholders of record as of the close of business on May 19, 2015.
	In April 2015, the Company reached a settlement with the IRS regarding transfer pricing for tax years 2009 and 2010.  The amount paid by the Company was well within its established tax reserves. Due to this settlement, the Company is expected to decrease the excess liability for this specific uncertain tax position in the amount of approximately $9.0 million as a result of this settlement in the second quarter of 2015.
	In February 2015, the Company’s Board of Directors approved the j2 Global, Inc. 2015 Stock Option Plan (the “2015 Plan”) to replace the Company’s j2 Global, Inc. 2007 Stock Plan (the “2007 Plan”), which the stockholders previously approved, and which will expire in October 2017 in accordance with its terms. On May 6, 2015, the 2015 Plan was approved by the stockholders and will expire in February 2025, unless earlier terminated by the Board of Directors.

Basis_Of_Presentation_Policy

Basis Of Presentation (Policy)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Use Of Estimates	Use of Estimates
	The preparation of consolidated financial statements in accordance with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements, including judgments about investment classifications, and the reported amounts of net revenue and expenses during the reporting period. We believe that our most significant estimates are those related to valuation and impairment of marketable securities, valuation of assets acquired and liabilities assumed in connection with business combinations, long-lived and intangible asset impairment, contingent consideration, income taxes and contingencies and allowance for doubtful accounts. On an ongoing basis, management evaluates its estimates based on historical experience and on various other factors that the Company believes to be reasonable under the circumstances. Actual results could materially differ from those estimates.
Allowances For Doubtful Accounts	Allowances for Doubtful Accounts
	j2 Global reserves for receivables it may not be able to collect. The reserves for the Company's Business Cloud Services segment are typically driven by the historical volume of credit card declines, an evaluation of current market conditions and past due invoices based on historical experience. The reserves for the Company's Digital Media segment are typically driven by past due invoices based on historical experience. Management evaluates the adequacy of these reserves on an ongoing basis.
Revenue Recognition	Revenue Recognition
	Business Cloud Services
	The Company's Business Cloud Services revenues substantially consist of monthly recurring subscription and usage-based fees, which are primarily paid in advance by credit card. In accordance with GAAP, the Company recognizes revenue when persuasive evidence of an arrangement exists, services have been provided, the sales price is fixed and determinable and collection is probable. The Company defers the portions of monthly, quarterly, semi-annually and annually recurring subscription and usage-based fees collected in advance and recognizes them in the period earned. Additionally, the Company defers and recognizes subscriber activation fees and related direct incremental costs over a subscriber's estimated useful life.
	j2 Global's Business Cloud Services also include patent license revenues generated under license agreements that provide for the payment of contractually determined fully paid-up or royalty-bearing license fees to j2 Global in exchange for the grant of non-exclusive, retroactive and future licenses to our intellectual property, including patented technology. Patent revenues may also consist of revenues generated from the sale of patents. Patent license revenues are recognized when earned over the term of the license agreements. With regard to fully paid-up license arrangements, the Company recognizes as revenue in the period the license agreement is executed the portion of the payment attributable to past use of the intellectual property and amortizes the remaining portion of such payments on a straight-line basis, or pro-rata revenue basis, as appropriate over the life of the licensed patent(s). With regard to royalty-bearing license arrangements, the Company recognizes revenues of license fees earned during the applicable period. With regard to patent sales, the Company recognizes as revenue in the period of the sale the amount of the purchase price over the carrying value of the patent(s) sold.
	The Business Cloud Services business also generates revenues by licensing certain technology to third parties. These licensing revenues are recognized when earned in accordance with the terms of the underlying agreement. Generally, revenue is recognized as the third party uses the licensed technology over the period.
	Digital Media
	The Company's Digital Media revenues primarily consist of revenues generated from the sale of advertising campaigns that are targeted to the Company's proprietary websites and to those websites operated by third parties that are part of the Digital Media business's advertising network. Revenues for these advertising campaigns are recognized as earned either when an ad is placed for viewing by a visitor to the appropriate web page or when the visitor "clicks through" on the ad, depending upon the terms with the individual advertiser.
	Revenues for Digital Media business-to-business operations consist of lead-generation campaigns for IT vendors and are recognized as earned when the Company delivers the qualified leads to the customer.
	j2 Global also generates Digital Media revenues through the license of certain assets to clients, for the clients' use in their own promotional materials or otherwise. Such assets may include logos, editorial reviews, or other copyrighted material. Revenues under such license agreements are recognized when the assets are delivered to the client. Also, Digital Media revenues are generated through the license of certain speed testing technology which is recognized when delivered to the client through providing data services primarily to Internet Service Providers ("ISPs") and wireless carriers which is recognized as earned over the term of the access period. The Digital Media business also generates other types of revenues, including business listing fees, subscriptions to online publications, and from other sources. Such other revenues are recognized as earned.
Fair Value Measurements	Fair Value Measurements
	As of March 31, 2015 and December 31, 2014, the carrying value of cash and cash equivalents, short-term investments, accounts receivable, interest receivable, accounts payable, accrued expenses, interest payable, customer deposits and long-term debt are reflected in the financial statements at cost. With the exception of long-term debt, cost approximates fair value due to the short-term nature of such instruments. The fair value of the Company's senior unsecured notes was determined using the quoted market prices of debt instruments with similar terms and maturities, if available. As of the same dates, the carrying value of other long-term liabilities approximated fair value as the related interest rates approximate rates currently available to j2 Global.
Debt, Policy [Policy Text Block]	Debt Issuance Costs and Debt Discount
	j2 Global capitalizes costs incurred with borrowing and issuance of debt securities and records debt discounts as a reduction to the debt amount. j2 Global capitalized third-party costs incurred in connection with its sale of senior unsecured notes within long-term other assets and recorded the original purchase discount as a reduction to such notes (See Note 7 - Long Term Debt). These costs and discounts are amortized and included in interest expense over the life of the borrowing or term of the credit facility using the interest method.
Concentration Of Credit Risk	Concentration of Credit Risk
	All of the Company’s cash, cash equivalents and marketable securities are invested primarily at major financial institutions within the United States, United Kingdom and Ireland, with cash and cash equivalents also held at financial institutions within several other countries, including Australia, Austria, Canada, China, France, Germany, Italy, Japan, New Zealand, the Netherlands and Poland. These institutions are required to invest the Company’s cash in accordance with the Company’s investment policy with the principal objectives being preservation of capital, fulfillment of liquidity needs and above market returns commensurate with preservation of capital. The Company’s investment policy also requires that investments in marketable securities be in only highly rated instruments, with limitations on investing in securities of any single issuer. However, these investments are not insured against the possibility of a total or near complete loss of earnings or principal and are inherently subject to the credit risk related to the continued credit worthiness of the underlying issuer and general credit market risks.
	At March 31, 2015 and December 31, 2014, the Company’s cash and cash equivalents were maintained in accounts that are insured up to the limit determined by the applicable governmental agency. The Company's deposits held in qualifying financial institutions in Ireland are fully insured through March 28, 2018 to the extent on deposit prior to March 28, 2013. With respect to the Company's deposits with financial institutions in other jurisdictions, the insured amounts are immaterial in comparison to the total amount of the Company’s cash and cash equivalents held by these institutions which is not insured.
Business Combinations Policy [Policy Text Block]	Contingent Consideration
	j2 Global measures contingent earn-out liabilities in connection with acquisitions at fair value on a recurring basis using significant unobservable inputs and such liabilities are classified within Level 3 of the fair value hierarchy (see Note 5 - Fair Value Measurements). The Company may use various valuation techniques depending on the terms and conditions of the contingent consideration including a Monte-Carlo simulation. This simulation uses a probability distribution for each significant input to produce hundreds or thousands of possible outcomes and the results are analyzed to determine probabilities of different outcomes occurring. Significant increases or decreases to these inputs in isolation would result in a significantly higher or lower liability with a higher liability capped by the contractual maximum of the contingent earn-out obligation, if any. Ultimately, the liability will be equivalent to the amount paid, and the difference between the fair value estimate and the amount paid will be recorded in earnings. If the amount paid that is less than the liability on the acquisition date, such deficiency is reflected as cash used in financing activities in our consolidated statements of cash flows. Any amount paid in excess of the liability on the acquisition date is reflected as cash used in operating activities.
	j2 Global reviews and re-assess the estimated fair value of contingent consideration on a quarterly basis, and the updated fair value could be materially different from the initial estimates or prior quarterly amounts. Changes in the estimated fair value of our contingent earn-out liabilities are reported in operating income, except for the time component of the present value calculation which is reported in interest expense.
Income Taxes	Income Taxes
	The Company must make certain estimates and judgments in determining income tax expense for financial statement purposes. These estimates and judgments occur in the following areas, among others: (i) calculation of tax credits, benefits and deductions; (ii) calculation of tax assets and liabilities arising from differences in the timing of recognition of revenue and expense for tax and financial statement purposes; and (iii) interest and penalties related to uncertain tax positions. Significant changes to these estimates may result in an increase or decrease to the Company’s tax provision in the current or a subsequent period.
	The Company must assess the likelihood that it will be able to recover its deferred tax assets. If recovery is not likely, the Company must increase its provision for taxes by recording a valuation allowance against the deferred tax assets that the Company estimates will not ultimately be recoverable. The Company believes that it will ultimately recover a substantial majority of the deferred tax assets recorded on its condensed consolidated balance sheets. However, should there be a change in the Company’s ability to recover its deferred tax assets, the Company’s tax provision would increase as a result of recording any necessary valuation allowances, in the period in which j2 Global determined that the recovery was not likely.
	The calculation of the Company’s tax liabilities involves dealing with uncertainties in the application of complex tax laws. j2 Global recognizes liabilities for uncertain tax positions based on a two-step process. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. If the Company determines that a tax position will more likely than not be sustained on audit, then the second step requires j2 Global to estimate and measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. It is inherently difficult and subjective to estimate such amounts, as j2 Global has to determine the probability of various possible outcomes. j2 Global reevaluates these uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, effectively settled issues under audit and new audit activity. Such a change in recognition or measurement would result in the recognition of a tax benefit or an additional charge to the tax provision.

Business_Acquisition_Tables

Business Acquisition (Tables)	3 Months Ended
	Mar. 31, 2015
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the allocation of the purchase consideration for these acquisitions (in thousands):
	Assets and Liabilities	Valuation
	Accounts receivable	$	2,154
	Property and equipment	1,017
	Other assets	259
	Software	267
	Trade names	2,934
	Customer relationships	36,902
	Other intangibles	33
	Goodwill	40,557
	Other accrued liabilities	(1,327		)
	Deferred revenue	(7,671		)
	Capital lease	(199		)
	Deferred tax liability	(1,459		)
	Total	$	73,467

Investments_Tables

Investments (Tables)	3 Months Ended
	Mar. 31, 2015
Investments [Abstract]
Schedule Of Debt Securities By Contractual Maturity Date	The following table summarizes j2 Global’s debt securities designated as available-for-sale, classified by the contractual maturity date of the security (in thousands):
		March 31,		December 31, 2014
		2015
	Due within 1 year	$	49,378	$	59,896
	Due within more than 1 year but less than 5 years	61,386		60,178
	Due within more than 5 years but less than 10 years	—		—
	Due 10 years or after	332		330
	Total	$	111,096	$	120,404
Schedule Of Available-For-Sale And Trading Securities	The following table summarizes the Company’s investments (in thousands):
		March 31,		December 31, 2014
		2015
	Available-for-sale	$	147,417	$	156,649
	Certificates of deposit	60		65
	Total	$	147,477	$	156,714
Summary Of Gross Unrealized Gains And Losses And Fair Values	The following table summarizes the gross unrealized gains and losses and fair values for the Company's investments classified as available-for-sale investments as of March 31, 2015 and December 31, 2014 aggregated by major security type (in thousands):
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			Losses
	March 31, 2015
	Corporate debt securities	$	80,043	$	164		$	(44	)	$	80,163
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	28,849		21			(4		)	28,866
	Debt securities issued by states of the United States and political subdivisions of the states	2,064		3			—			2,067
	Equity securities	20,611		15,710			—			36,321
	Total	$	131,567	$	15,898		$	(48	)	$	147,417
	December 31, 2014
	Corporate debt securities	$	91,456	147			$	(136	)	$	91,467
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	26,848		9			(13		)	26,844
	Debt securities issued by states of the United States and political subdivisions of the states	2,088		5			—			2,093
	Equity securities	20,611		15,634			—			36,245
	Total	$	141,003	$	15,795		$	(149	)	$	156,649
Schedule of Unrealized Loss on Investments [Table Text Block]	The following tables present gross unrealized losses and fair values for those investments that were in an unrealized loss position as of March 31, 2015 and December 31, 2014, aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in thousands):
		As of March 31, 2015
		Less than 12 Months					12 Months or Greater						Total
		Fair Value		Unrealized Loss			Fair Value			Unrealized Loss			Fair Value		Unrealized Loss
	Corporate debt securities	$	36,947	$	(41	)	$	1,258		$	(3	)	$	38,205	$	(44	)
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	12,345		(4		)	625			—			12,970		(4		)
	Total	$	49,292	$	(45	)	$	1,883		$	(3	)	$	51,175	$	(48	)
		As of December 31, 2014
		Less than 12 Months					12 Months or Greater						Total
		Fair Value		Unrealized Loss			Fair Value			Unrealized Loss			Fair Value		Unrealized Loss
	Corporate debt securities	$	57,898	$	(131	)	$	1,260		$	(5	)	$	59,158	$	(136	)
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	15,072		(13		)	—			—			15,072		(13		)
	Total	$	72,970	$	(144	)	$	1,260		$	(5	)	$	74,230	$	(149	)

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Schedule Of Fair Values Of Financial Instruments Measured On Recurring Basis	The following tables present the fair values of the Company’s financial assets or liabilities that are measured at fair value on a recurring basis (in thousands):
	March 31, 2015	Level 1			Level 2		Level 3		Fair Value
	Assets:
	Cash equivalents:
	Money market and other funds	$	190,559		$	—	$	—	$	190,559
	Time deposits	—			21,673		—		21,673
	Corporate commercial papers	—			17,921		—		17,921
	Certificates of deposit	—			60		—		60
	Equity securities	36,321			—		—		36,321
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	—			28,866		—		28,866
	Debt securities issued by states of the U.S. and political subdivisions of the states	—			2,067		—		2,067
	Debt securities issued by foreign governments	—			—		—		—
	Corporate debt securities	—			80,163		—		80,163
	Total assets measured at fair value	$	226,880		$	150,750	$	—	$	377,630
	Liabilities:
	Contingent consideration	$	—		$	—	$	12,000	$	12,000
	Contingent interest derivative	—			742		—		742
	Total liabilities measured at fair value	$	—		$	742	$	12,000	$	12,742
	December 31, 2014	Level 1			Level 2		Level 3		Fair Value
	Assets:
	Cash equivalents:
	Money market and other funds	$	212,645		$	—	$	—	$	212,645
	Time deposits	—			51,807		—		51,807
	Certificates of deposit	—			65		—		65
	Equity securities	36,245			—		—		36,245
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	—			26,844		—		26,844
	Debt securities issued by states of the U.S. and political subdivisions of the states	—			2,093		—		2,093
	Corporate debt securities	—			91,467		—		91,467
	Total assets measured at fair value	$	248,890		$	172,276	$	—	$	421,166
	Liabilities:
	Contingent consideration	$	—		$	—	$	15,000	$	15,000
	Contingent interest derivative	—			742		—		742
	Total liabilities measured at fair value	$	—		$	742	$	15,000	$	15,742
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	The following tables presents a reconciliation of the Company’s Level 3 financial assets or liabilities that are measured at fair value on a recurring basis (in thousands):
		Level 3			Affected line item in the Statement of Income
	Balance as of December 31, 2014	$	15,000
	Contingent consideration	(3,000		)	Not Applicable
	Total (gains) losses reported in earnings	—
	Transfers into or out of Level 3	—
	Balance as of March 31, 2015	$	12,000
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	The following tables presents a reconciliation of the Company’s derivative instruments (in thousands):
		Amount			Affected line item in the Statement of Income
	Derivative Liabilities:
	Level 2:
	Balance as of December 31, 2014	$	742
	Total (gains) losses reported in earnings	—
	Balance as of March 31, 2015	$	742

Goodwill_And_Intangible_Assets1

Goodwill And Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Changes In Carrying Amounts Of Goodwill	The changes in carrying amounts of goodwill for the three months ended March 31, 2015 are as follows (in thousands):
		Business Cloud Services				Digital Media				Consolidated
	Balance as of January 1, 2015	$	390,063			$	245,612			$	635,675
	Goodwill acquired (Note 3)	40,557				—				40,557
	Purchase accounting adjustments	3,436				(4,200		)		(764		)
	Foreign exchange translation	(6,069		)		(25		)		(6,094		)
	Balance as of March 31, 2015	$	427,987			$	241,387			$	669,374
Schedule Of Intangible Assets With Indefinite Lives	Intangible Assets with Indefinite Lives:
		March 31,				December 31,
		2015				2014
	Trade name	$	27,379			$	27,379
	Other	5,432				5,432
	Total	$	32,811			$	32,811
Finite-Lived Intangible Assets By Major Class	As of December 31, 2014, intangible assets subject to amortization relate primarily to the following (in thousands):
		Weighted-Average		Historical				Accumulated				Net
		Amortization		Cost				Amortization
		Period
	Trade names	14.5 years		$	94,770			$	(16,598	)		$	78,172
	Patent and patent licenses	9.0 years		62,940				(38,013		)		24,927
	Customer relationships	9.3 years		230,424				(66,658		)		163,766
	Other purchased intangibles	4.3 years		28,360				(16,236		)		12,124
	Total			$	416,494			$	(137,505	)		$	278,989
	As of March 31, 2015, intangible assets subject to amortization relate primarily to the following (in thousands):
		Weighted-Average		Historical				Accumulated				Net
		Amortization		Cost				Amortization
		Period
	Trade names	14.2 years		$	97,112			$	(18,637	)		$	78,475
	Patent and patent licenses	8.3 years		63,136				(40,168		)		22,968
	Customer relationships	9.0 years		260,380				(76,052		)		184,328
	Other purchased intangibles	4.3 years		28,379				(17,665		)		10,714
	Total			$	449,007			$	(152,522	)		$	296,485

Long_Term_Debt_Tables

Long Term Debt (Tables)	3 Months Ended
	Mar. 31, 2015
Long-term Debt, Unclassified [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	Long-term debt as of March 31, 2015 consists of the following (in thousands):
	Senior Notes	$	246,324
	Convertible Notes	348,942
	Total long-term debt	595,266
	Less: current portion	—
	Total long-term debt, less current portion	$	595,266

Stock_Options_And_Employee_Sto1

Stock Options And Employee Stock Purchase Plan (Tables)	3 Months Ended
	Mar. 31, 2015
Stock Options Activity	The following table represents stock option activity for the three months ended March 31, 2015:
		Number of		Weighted-				Weighted-Average	Aggregate
		Shares		Average				Remaining	Intrinsic
				Exercise				Contractual	Value
				Price				Term (in years)
	Outstanding at January 1, 2015	725,649		$	24.29
	Granted	—		—
	Exercised	(2,800	)	23.11
	Canceled	—		—
	Outstanding at March 31, 2015	722,849		24.3				3.6	$	29,913,357
	Exercisable at March 31, 2015	625,639		23.85				3.2	$	26,170,104
	Vested and expected to vest at March 31, 2015	714,217		$	24.25			3.6	$	29,589,392
Allocation Of Share-Based Compensation Expense	The following table represents share-based compensation expense included in cost of revenues and operating expenses in the accompanying condensed consolidated statements of income for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended March 31,
		2015			2014
	Cost of revenues	$	83		$	154
	Operating expenses:
	Sales and marketing	584			491
	Research, development and engineering	194			140
	General and administrative	2,143			1,599
	Total	$	3,004		$	2,384
Restricted Stock [Member]
Restricted Stock And Restricted Stock Unit Award Activity	Restricted stock award activity for the three months ended March 31, 2015 is set forth below:
		Shares		Weighted-Average
				Grant-Date
				Fair Value
	Nonvested at January 1, 2015	814,050		$	26.57
	Granted	24,000		59.86
	Vested	(29,442	)	32.67
	Canceled	(24,546	)	26.35
	Nonvested at March 31, 2015	784,062		$	27.36
Restricted Stock Units (RSUs) [Member]
Restricted Stock And Restricted Stock Unit Award Activity	Restricted stock unit award activity for the three months ended March 31, 2015 is set forth below:
		Number of		Weighted-Average		Aggregate
		Shares		Remaining		Intrinsic
				Contractual		Value
				Term (in years)
	Outstanding at January 1, 2015	102,294
	Granted	8,000
	Vested	(4,000	)
	Canceled	—
	Outstanding at March 31, 2015	106,294		2		$	7,022,768
	Vested and expected to vest at March 31, 2015	82,906		1.8		$	5,445,291

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share Reconciliation [Abstract]
Components Of Basic And Diluted Earnings Per Share	The components of basic and diluted earnings per share are as follows (in thousands, except share and per share data):
		Three Months Ended March 31,
		2015			2014
	Numerator for basic and diluted net income per common share:
	Net income attributable to j2 Global, Inc. common shareholders	$	21,877		$	28,765
	Net income available to participating securities (a)	(360		)	(635		)
	Net income available to j2 Global, Inc. common shareholders	$	21,517		$	28,130
	Denominator:
	Weighted-average outstanding shares of common stock	47,422,396			46,365,158
	Dilutive effect of:
	Equity incentive plans	343,692			400,574
	Common stock and common stock equivalents	47,766,088			46,765,732
	Net income per share:
	Basic	$	0.45		$	0.61
	Diluted	$	0.45		$	0.6
	(a)	Represents unvested restricted stock awards that contain certain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid).

Segment_and_Geographic_Informa1

Segment and Geographic Information (Tables)	3 Months Ended
	Mar. 31, 2015
Segments, Geographical Areas [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Information on reportable segments and reconciliation to consolidated income from operations is presented below (in thousands):
		Three Months Ended March 31,
		2015			2014
	Revenues by segment:
	Business Cloud Services	$	118,061		$	100,830
	Digital Media	43,257			33,368
	Elimination of inter-segment revenues	(65		)	(74		)
	Total revenues	161,253			134,124
	Direct costs by segment(1):
	Business Cloud Services	71,043			55,612
	Digital Media	39,089			28,716
	Direct costs by segment(1):	110,132			84,328
	Business Cloud Services operating income	47,018			45,218
	Digital Media operating income	4,168			4,652
	Segment operating income	51,186			49,870
	Global operating costs(2)	10,656			8,285
	Income from operations	$	40,530		$	41,585
	(1) Direct costs for each segment include cost of revenues and other operating expenses that are directly attributable to the segment, such as employee compensation expense, local sales and marketing expenses, engineering and network operations expense, depreciation and amortization and other administrative expenses.
	(2) Global operating costs include general and administrative and other corporate expenses that are managed on a global basis and that are not directly attributable to any particular segment.
		March 31, 2015			December 31, 2014
	Assets:
	Business Cloud Services	$	918,180		$	883,587
	Digital Media	372,757			378,381
	Total assets from reportable segments	1,290,937			1,261,968
	Corporate	407,299			443,234
	Total assets	$	1,698,236		$	1,705,202
		Three Months Ended March 31,
		2015			2014
	Capital expenditures:
	Business Cloud Services	$	1,280		$	1,875
	Digital Media	1,622			956
	Total from reportable segments	2,902			2,831
	Corporate	54			105
	Total capital expenditures	$	2,956		$	2,936
		Three Months Ended March 31,
		2015			2014
	Depreciation and amortization:
	Business Cloud Services	$	14,013		$	8,030
	Digital Media	7,080			4,918
	Total from reportable segments	21,093			12,948
	Corporate	194			189
	Total depreciation and amortization	$	21,287		$	13,137
Summary On Revenues And Long-Lived Assets By Geographic Areas	j2 Global maintains operations in the U.S., Canada, Ireland, Japan and other countries. Geographic information about the U.S. and all other countries for the reporting periods is presented below. Such information attributes revenues based on jurisdictions where revenues are reported (in thousands).
		Three Months Ended March 31,
		2015			2014
	Revenues:
	United States	$	109,032		$	91,428
	Canada	18,139			17,508
	Ireland	9,935			10,511
	All other countries	24,147			14,677
		$	161,253		$	134,124
		March 31,			December 31,
		2015			2014
	Long-lived assets:
	United States	$	227,561		$	216,099
	All other countries	105,541			101,107
	Total	$	333,102		$	317,206

Unrestricted_Subsidiaries_Tabl

Unrestricted Subsidiaries (Tables)	3 Months Ended
	Mar. 31, 2015
Unrestricted Subsidiaires [Abstract]
Schedule of Unrestricted Subsidiaries Financial Information [Table Text Block]	The financial position of the Unrestricted Subsidiaries as of March 31, 2015 and December 31, 2014 is as follows (in thousands):
		March 31, 2015			December 31, 2014
	ASSETS
	Cash and cash equivalents	$	39,314		$	27,944
	Accounts receivable	49,837			57,005
	Prepaid expenses and other current assets	3,527			2,986
	Deferred income taxes	5,817			5,292
	Total current assets	98,495			93,227
	Property and equipment, net	13,061			12,834
	Trade names, net	68,626			70,310
	Patent and patent licenses, net	22,088			24,007
	Customer relationships, net	52,781			55,925
	Goodwill	241,388			245,613
	Other purchased intangibles, net	7,899			8,901
	Other assets	1,639			1,706
	Total assets	$	505,977		$	512,523
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	$	35,634		$	40,296
	Income taxes payable	—			316
	Deferred revenue, current	6,086			5,277
	Total current liabilities	41,720			45,889
	Long-term debt	110,000			110,000
	Deferred income taxes	18,253			17,397
	Other long-term liabilities	13,638			16,243
	Total liabilities	183,611			189,529
	Additional paid-in capital	315,427			317,932
	Retained Earnings	7,478			6,051
	Accumulated other comprehensive income (loss)	(539		)	(989		)
	Total stockholders’ equity	322,366			322,994
	Total liabilities and stockholders’ equity	$	505,977		$	512,523
	The results of operations of the Unrestricted Subsidiaries for the three months ended March 31, 2015 and 2014 is as follows (in thousands):
		Three Months Ended March 31,
		2015 (1)			2014
	Revenues	$	44,420		$	33,368
	Cost of revenues	4,354			3,852
	Gross profit	40,066			29,516
	Operating expenses:
	Sales and marketing	17,662			14,958
	Research, development and engineering	1,901			1,072
	General and administrative	17,979			8,834
	Total operating expenses	37,542			24,864
	Income from operations	2,524			4,652
	Interest expense (income), net	2,517			1
	Other expense (income), net	243			(342		)
	Income (loss) before income taxes	(236		)	4,993
	Income tax expense	319			2,027
	Net income (loss)	$	(555	)	$	2,966
	(1) Effective in the second quarter of 2014, Advanced Messaging Technologies, Inc. and subsidiaries were classified as Unrestricted Subsidiaries. As a result, the prior period may not be comparable to the current period presentation.

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2015
Accumulated Other Comprehensive Income [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table summarizes the changes in accumulated balances of other comprehensive income, net of tax, for the three months ended March 31, 2015 (in thousands):
		Unrealized Gains (Losses) on Investments				Foreign Currency Translation			Total
	Beginning balance	$	9,388			$	(16,515	)	$	(7,127	)
	Other comprehensive (loss) income before reclassifications	387				(15,237		)	(14,850		)
	Amounts reclassified from accumulated other comprehensive income	(7		)		—			(7		)
	Net current period other comprehensive (loss) income	380				(15,237		)	(14,857		)
	Ending balance	$	9,768			$	(31,752	)	$	(21,984	)
Reclassification Out Of Accumulated Other Comprehensive Income [Table Text Block]	The following table provides details about reclassifications out of accumulated other comprehensive income for the three months ended March 31, 2015 (in thousands):
	Details about Accumulated Other Comprehensive Income Components		Amount Reclassified from Accumulated Other Comprehensive Income				Affected Line Item in the Statement of Income
			Three Months Ended March 31, 2015
	Unrealized gain on available-for-sale investments		$	(11	)		Other expense (income), net
			(11		)		Total, before income taxes
			4				Income tax expense (benefit)
			(7		)		Total, net of tax
	Total reclassifications for the period		$	(7	)		Total, net of tax

Condensed_Consolidating_Financ1

Condensed Consolidating Financials (Tables)	3 Months Ended
	Mar. 31, 2015
Condensed Financial Information [Abstract]
Condensed Balance Sheet [Table Text Block]	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONDENSED CONSOLIDATED BALANCE SHEET
	(Unaudited, in thousands except share and per share data)
		31-Mar-15
	BALANCE SHEET	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	ASSETS
	Cash and cash equivalents	$	199,815		$	17,516		$	174,686		$	—		$	392,017
	Short-term investments	41,880			43,819			60			—			85,759
	Accounts receivable, net	326			12,059			70,187			—			82,572
	Prepaid expenses and other current assets	737			14,472			9,505			(103		)	24,611
	Deferred income taxes	896			—			1,250			—			2,146
	Intercompany receivable	110,000			91,474			—			(201,474		)	—
	Total current assets	353,654			179,340			255,688			(201,577		)	587,105
	Long-term investments	52,619			9,099			—			—			61,718
	Property and equipment, net	—			7,567			29,051			—			36,618
	Trade names, net	—			10,199			95,655			—			105,854
	Patent and patent licenses, net	—			850			22,118			—			22,968
	Customer relationships, net	—			1,952			182,376			—			184,328
	Goodwill	—			52,131			617,243			—			669,374
	Other purchased intangibles, net	—			4,264			11,882			—			16,146
	Investment in subsidiaries	839,108			909,081			8,717			(1,756,906		)	—
	Other assets	9,061			3,063			2,001			—			14,125
	Total assets	$	1,254,442		$	1,177,546		$	1,224,731		$	(1,958,483	)	$	1,698,236
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	$	4,798		$	23,185		$	53,025		$	—		$	81,008
	Income taxes payable	2,959			103			—			(103		)	2,959
	Deferred revenue, current	—			20,774			52,504			—			73,278
	Capital lease, current	—			—			441			—			441
	Deferred income taxes	43			—			142			—			185
	Intercompany payable	48,268			—			153,206			(201,474		)	—
	Total current liabilities	56,068			44,062			259,318			(201,577		)	157,871
	Long term debt	348,942			246,324			—			—			595,266
	Capital lease, non-current	—			—			66			—			66
	Liability for uncertain tax positions	—			40,145			—			—			40,145
	Deferred income taxes	24,685			—			38,424			—			63,109
	Deferred revenue, non-current	—			7,009			1,896			—			8,905
	Other long-term liabilities	1,071			898			15,946			—			17,915
	Total liabilities	430,766			338,438			315,650			(201,577		)	883,277
	Common stock, $0.01 par value.	474			—			—			—			474
	Additional paid-in capital - common	275,420			233,836			421,684			(655,520		)	275,420
	Retained earnings	547,697			595,691			519,047			(1,101,386		)	561,049
	Accumulated other comprehensive loss	85			9,581			(31,650		)	—			(21,984		)
	Total stockholders’ equity	823,676			839,108			909,081			(1,756,906		)	814,959
	Total liabilities and stockholders’ equity	$	1,254,442		$	1,177,546		$	1,224,731		$	(1,958,483	)	$	1,698,236
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONDENSED CONSOLIDATED BALANCE SHEET
	(Unaudited, in thousands except share and per share data)
		31-Dec-14
	BALANCE SHEET	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	ASSETS
	Cash and cash equivalents	$	226,790		$	36,810		$	170,063		$	—		$	433,663
	Short-term investments	47,880			48,261			65			—			96,206
	Accounts receivable, net	—			11,167			80,532			—			91,699
	Prepaid expenses and other current assets	776			12,689			9,137			—			22,602
	Deferred income taxes	1,271			—			742			—			2,013
	Intercompany receivable	110,000			74,938			1,428			(186,366		)	—
	Total current assets	386,717			183,865			261,967			(186,366		)	646,183
	Long-term investments	55,452			5,056			—			—			60,508
	Property and equipment, net	—			8,011			30,206			—			38,217
	Trade names, net	—			10,231			95,320			—			105,551
	Patent and patent licenses, net	—			886			24,041			—			24,927
	Customer relationships, net	—			2,206			161,560			—			163,766
	Goodwill	—			52,131			583,544			—			635,675
	Other purchased intangibles, net	—			4,276			13,280			—			17,556
Investment in subsidiaries	826,289			900,681			8,716			(1,735,686		)	—
Other assets	9,328			1,368			2,123			—			12,819
Total assets	$	1,277,786		$	1,168,711		$	1,180,757		$	(1,922,052	)	$	1,705,202
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable and accrued expenses	$	2,834		$	28,414		$	64,062		$	—		$	95,310
Income taxes payable	—			—			—			—			—
Deferred revenue, current	—			23,091			40,366			—			63,457
Capital lease, current	—			—			258			—			258
Deferred income taxes	—			—			342			—			342
Intercompany payable	76,366			—			110,000			(186,366		)	—
Total current liabilities	79,200			51,505			215,028			(186,366		)	159,367
Long term debt	347,163			246,187			—			—			593,350
Capital lease, non-current	—			—			141			—			141
Liability for uncertain tax positions	—			37,551			—			—			37,551
Deferred income taxes	21,728			(1,837		)	42,069			—			61,960
Deferred revenue, non-current	—			8,187			1,995			—			10,182
Other long-term liabilities	744			829			20,843			—			22,416
Total liabilities	448,835			342,422			280,076			(186,366		)	884,967
Common stock, $0.01 par value	474			—			—			—			474
Additional paid-in capital - common	273,304			232,340			421,676			(654,016		)	273,304
Retained earnings	555,158			584,591			495,505			(1,081,670		)	553,584
Accumulated other comprehensive loss	15			9,358			(16,500		)	—			(7,127		)
Total stockholders’ equity	828,951			826,289			900,681			(1,735,686		)	820,235
Total liabilities and stockholders’ equity	$	1,277,786		$	1,168,711		$	1,180,757		$	(1,922,052	)	$	1,705,202
Condensed Income Statement [Table Text Block]	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONDENSED CONSOLIDATED STATEMENT OF INCOME
	(Unaudited, in thousands except share and per share data)
		Three Months Ended March 31, 2015
		j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Revenues:
	Total revenues	$	—		$	54,619		$	116,435		$	(9,801	)	$	161,253
	Cost of revenues	—			15,528			22,394			(9,736		)	28,186
	Gross profit	—			39,091			94,041			(65		)	133,067
	Operating expenses:
	Sales and marketing	—			9,780			27,875			(65		)	37,590
	Research, development and engineering	—			3,855			4,592			—			8,447
	General and administrative	4,179			6,850			35,471			—			46,500
	Total operating expenses	4,179			20,485			67,938			(65		)	92,537
	Operating income	(4,179		)	18,606			26,103			—			40,530
	Equity earnings in subsidiaries	26,251			23,539			—			(49,790		)	—
	Interest expense (income), net	2,588			5,107			2,618			—			10,313
	Other expense (income), net	(12		)	339			(1,111		)	—			(784		)
	Income before income taxes	19,496			36,699			24,596			(49,790		)	31,001
	Income tax expense	(2,381		)	10,448			1,057			—			9,124
	Net income	$	21,877		$	26,251		$	23,539		$	(49,790	)	$	21,877
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONDENSED CONSOLIDATED STATEMENT OF INCOME
	(Unaudited, in thousands except share and per share data)
		Three Months Ended March 31, 2014
		j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Revenues:
	Total revenues	$	—		$	51,193		$	96,634		$	(13,703	)	$	134,124
	Cost of revenues	—			19,953			17,065			(13,630		)	23,388
	Gross profit	—			31,240			79,569			(73		)	110,736
	Operating expenses:
	Sales and marketing	—			9,013			24,019			(73		)	32,959
	Research, development and engineering	—			3,620			3,593			—			7,213
	General and administrative	—			9,570			19,409			—			28,979
	Total operating expenses	—			22,203			47,021			(73		)	69,151
	Operating income	—			9,037			32,548			—			41,585
	Equity earnings in subsidiaries	—			27,942			—			(27,942		)	—
	Interest expense (income), net	—			5,103			(155		)	—			4,948
	Other expense (income), net	—			(32		)	(287		)	—			(319		)
	Income before income taxes	—			31,908			32,990			(27,942		)	36,956
	Income tax expense	—			3,143			5,048			—			8,191
	Net income	$	—		$	28,765		$	27,942		$	(27,942	)	$	28,765
Condensed Comprehensive Income Statement [Table Text Block]	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
	(Unaudited, in thousands except share and per share data)
		Three Months Ended March 31, 2015
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Net income	$	21,877		$	26,251		$	23,539		$	(49,790	)	$	21,877
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment, net of tax expense (benefit)	—			—			(15,237		)	—			(15,237		)
	Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	311			69			—			—			380
	Other comprehensive income (loss), net of tax	311			69			(15,237		)	—			(14,857		)
	Comprehensive income	$	22,188		$	26,320		$	8,302		$	(49,790	)	$	7,020
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
	(Unaudited, in thousands except share and per share data)
		Three Months Ended March 31, 2014
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Net income	$	—		$	28,765		$	27,942		$	(27,942	)	$	28,765
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment, net of tax expense (benefit)	—			(248		)	1,085			—			837
	Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			(2,649		)	9			—			(2,640		)
	Other comprehensive income (loss), net of tax	—			(2,897		)	1,094			—			(1,803		)
	Comprehensive income	$	—		$	25,868		$	29,036		$	(27,942	)	$	26,962
Condensed Cash Flow Statement [Table Text Block]	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONDENSED CONSOLIDATED STATEMENT OF CASH FLOW
	(Unaudited, in thousands except share and per share data)
		Three Months Ended March 31, 2015
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Net cash (used in) provided by operating activities	$	(8,106	)	$	6,745		$	47,077		$	—		$	45,716
	Cash flows from investing activities:
	Maturity of available-for-sale investments	21,994			7,000			—			—			28,994
	Purchase of available-for-sale investments	(13,276		)	(6,543		)	—			—			(19,819		)
	Purchases of property and equipment	—			(308		)	(2,648		)	—			(2,956		)
	Acquisition of businesses, net of cash received	—			1,459			(73,674		)	—			(72,215		)
	Purchases of intangible assets	—			(5		)	(322		)	—			(327		)
	Investment in subsidiaries	—			—			—			—			—
	Net cash (used in) provided by investing activities	8,718			1,603			(76,644		)	—			(66,323		)
	Cash flows from financing activities:
	Repurchases of common and restricted stock	(705		)	—			—			—			(705		)
	Issuance of common stock under employee stock purchase plan	61			—			—			—			61
	Exercise of stock options	65			—			—			—			65
	Dividends paid	(14,110		)	—			—			—			(14,110		)
	Excess tax benefits from share-based compensation	334			—			—			—			334
	Deferred payments for acquisitions	—			(544		)	(1,812		)	—			(2,356		)
	Other	—			—			(50		)	—			(50		)
	Intercompany	(13,232		)	(27,098		)	40,330			—			—
	Net cash (used in) provided by financing activities	(27,587		)	(27,642		)	38,468			—			(16,761		)
	Effect of exchange rate changes on cash and cash equivalents	—			—			(4,278		)	—			(4,278		)
	Net change in cash and cash equivalents	(26,975		)	(19,294		)	4,623			—			(41,646		)
	Cash and cash equivalents at beginning of period	226,790			36,810			170,063			—			433,663
	Cash and cash equivalents at end of period	$	199,815		$	17,516		$	174,686		$	—		$	392,017
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONDENSED CONSOLIDATED STATEMENT OF CASH FLOW
	(Unaudited, in thousands except share and per share data)
		Three Months Ended March 31, 2014
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Net cash provided by operating activities	$	—		$	(3,119	)	$	40,413		$	—		$	37,294
	Cash flows from investing activities:
	Maturity of certificates of deposit	—			8,210			—			—			8,210
	Maturity of available-for-sale investments	—			24,105			5,600			—			29,705
	Purchase of available-for-sale investments	—			(11,213		)	—			—			(11,213		)
	Purchases of property and equipment	—			(454		)	(2,482		)	—			(2,936		)
	Acquisition of businesses, net of cash received	—			—			(49,068		)	—			(49,068		)
	Purchases of intangible assets	—			(591		)	(324		)	—			(915		)
	Investment in subsidiaries	—			(1,021		)	1,021			—			—
	Net cash (used in) provided by investing activities	—			19,036			(45,253		)	—			(26,217		)
	Cash flows from financing activities:
	Repurchases of common stock and restricted stock	—			(4,042		)	—			—			(4,042		)
	Issuance of common stock under employee stock purchase plan	—			55			—			—			55
	Exercise of stock options	—			4,926			—			—			4,926
	Dividends paid	—			(12,418		)	—			—			(12,418		)
	Excess tax benefits from share-based compensation	—			4,082			—			—			4,082
	Deferred payments for acquisitions	—			—			(3,314		)	—			(3,314		)
	Other	—			—			—			—			—
	Intercompany	—			2,335			(2,335		)	—			—
	Net cash (used in) provided by financing activities	—			(5,062		)	(5,649		)	—			(10,711		)
	Effect of exchange rate changes on cash and cash equivalents	—			—			(99		)	—			(99		)
	Net change in cash and cash equivalents	—			10,855			(10,588		)	—			267
	Cash and cash equivalents at beginning of period	—			34,406			173,395			—			207,801
	Cash and cash equivalents at end of period	$	—		$	45,261		$	162,807		$	—		$	208,068

Basis_Of_Presentation_Details

Basis Of Presentation (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenue	$161,253	$134,124
Net income attributable to j2 Global, Inc. common shareholders	$21,877	$28,765
Basic earnings per share	$0.45	$0.61
Diluted earnings per share	$0.45	$0.60

Business_Acquisition_Details

Business Acquisition (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Goodwill, Purchase Accounting Adjustments	($800,000)
Goodwill, Acquired During Period	40,557,000
Goodwill	669,374,000	635,675,000
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount	20,400,000
Business Acquisition Contributed Total Revenue	2,938,000
Total consideration of transaction, net of cash acquired	$73,467,000

Business_Acquisition_Business_

Business Acquisition Business Acquisition (Allocation of Aggregate Purchase Price) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	$2,154
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	1,017
Business Combination, Purchase Price Allocation Current Noncurrent Assets Prepaid Expense and Other Assets	259
Business Combination, Purchase Price Allocation, Goodwill Amount	669,374	635,675
Goodwill, Acquired During Period	40,557
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	-1,327
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	-7,671
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Capital Lease Obligation	-199
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	-1,459
Total consideration of transaction, net of cash acquired	73,467
Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	267
Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	2,934
Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	36,902
Other Intangible Assets [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$33

Investments_Investments_Narrat

Investments Investments (Narrative) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Investments [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$49,292	$72,970
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$1,883	$1,260

Investments_Schedule_Of_Debt_S

Investments (Schedule Of Debt Securities By Contractual Maturity Date) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Investments [Abstract]
Due within 1 year	$49,378	$59,896
Due within more than 1 year but less than 5 years	61,386	60,178
Due within more than 5 years but less than 10 years	0	0
Due 10 years or after	332	330
Total	$111,096	$120,404

Investments_Schedule_Of_Availa

Investments (Schedule Of Available-For-Sale And Trading Securities) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Investments [Abstract]
Available-for-sale Securities	$147,417	$156,649
Certificates of Deposit, at Carrying Value	60	65
Total	$147,477	$156,714

Investments_Summary_Of_Gross_U

Investments (Summary Of Gross Unrealized Gains And Losses And Fair Values) (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$131,567	$141,003
Available-for-sale Securities, Gross Unrealized Gains	15,898	15,795
Available-for-sale Securities, Gross Unrealized Losses	-48	-149
Available-for-sale Securities	147,417	156,649
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	80,043
Available-for-sale Securities, Gross Unrealized Gains	164
Available-for-sale Securities, Gross Unrealized Losses	44
Available-for-sale Securities	80,163
Debt Securities Issued By The U.S Treasury And Other U.S Government Corporations And Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	28,849	26,848
Available-for-sale Securities, Gross Unrealized Gains	21	9
Available-for-sale Securities, Gross Unrealized Losses	4	13
Available-for-sale Securities	28,866	26,844
Debt Securities Issued By States Of The United States And Political Subdivisions Of The States [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	2,064	2,088
Available-for-sale Securities, Gross Unrealized Gains	3	5
Available-for-sale Securities, Gross Unrealized Losses	0	0
Available-for-sale Securities	2,067	2,093
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	20,611	20,611
Available-for-sale Securities, Gross Unrealized Gains	15,710	15,634
Available-for-sale Securities, Gross Unrealized Losses	0	0
Available-for-sale Securities	36,321	36,245
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		91,456
Available-for-sale Securities, Gross Unrealized Gains		147
Available-for-sale Securities, Gross Unrealized Losses		136
Available-for-sale Securities		$91,467

Investments_Investments_Summar

Investments Investments (Summary of Unrealized Loss by 12 month Period) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Investments Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$49,292	$72,970
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-45	-144
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,883	1,260
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-3	-5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	51,175	74,230
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-48	-149
Corporate Debt Securities [Member]
Investments Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	36,947	57,898
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-41	-131
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,258	1,260
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-3	-5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	38,205	59,158
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-44	-136
Debt Securities Issued By The U.S Treasury And Other U.S Government Corporations And Agencies [Member]
Investments Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	12,345	15,072
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-4	-13
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	625	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	12,970	15,072
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	($4)	($13)

Fair_Value_Measurements_Fair_V

Fair Value Measurements Fair Value Measurements (Narrative) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Long-term Debt	$595,266,000	$593,350,000
Long-term Debt, Fair Value	$732,800,000	$711,100,000

Fair_Value_Measurements_Schedu

Fair Value Measurements (Schedule Of Fair Values Of Financial Instruments Measured On Recurring Basis) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Total assets	$377,630	$421,166
Business Combination, Contingent Consideration, Liability	12,000	15,000
Derivative Liability, Fair Value, Gross Liability	742	742
Financial Liabilities Fair Value Disclosure	12,742	15,742
Money Market Funds [Member]
Cash	190,559	212,645
Bank Time Deposits [Member]
Cash	21,673	51,807
Commercial Paper [Member]
Cash	17,921
Certificates of Deposit [Member]
Investments	60	65
Equity Securities [Member]
Investments	36,321	36,245
Debt Securities Issued By The U.S Treasury And Other U.S Government Corporations And Agencies [Member]
Investments	28,866	26,844
Debt Securities Issued By States Of The United States And Political Subdivisions Of The States [Member]
Investments	2,067	2,093
Debt Securities Issued By Foreign Governments [Member]
Investments	0
Corporate Debt Securities [Member]
Investments	80,163	91,467
Level 1 [Member]
Total assets	226,880	248,890
Business Combination, Contingent Consideration, Liability	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Financial Liabilities Fair Value Disclosure	0	0
Level 1 [Member] | Money Market Funds [Member]
Cash	190,559	212,645
Level 1 [Member] | Bank Time Deposits [Member]
Cash	0	0
Level 1 [Member] | Commercial Paper [Member]
Cash	0
Level 1 [Member] | Certificates of Deposit [Member]
Investments	0	0
Level 1 [Member] | Equity Securities [Member]
Investments	36,321	36,245
Level 1 [Member] | Debt Securities Issued By The U.S Treasury And Other U.S Government Corporations And Agencies [Member]
Investments	0	0
Level 1 [Member] | Debt Securities Issued By States Of The United States And Political Subdivisions Of The States [Member]
Investments	0	0
Level 1 [Member] | Debt Securities Issued By Foreign Governments [Member]
Investments	0
Level 1 [Member] | Corporate Debt Securities [Member]
Investments	0	0
Level 2 [Member]
Total assets	150,750	172,276
Business Combination, Contingent Consideration, Liability	0	0
Derivative Liability, Fair Value, Gross Liability	742	742
Financial Liabilities Fair Value Disclosure	742	742
Level 2 [Member] | Money Market Funds [Member]
Cash	0	0
Level 2 [Member] | Bank Time Deposits [Member]
Cash	21,673	51,807
Level 2 [Member] | Commercial Paper [Member]
Cash	17,921
Level 2 [Member] | Certificates of Deposit [Member]
Investments	60	65
Level 2 [Member] | Equity Securities [Member]
Investments	0	0
Level 2 [Member] | Debt Securities Issued By The U.S Treasury And Other U.S Government Corporations And Agencies [Member]
Investments	28,866	26,844
Level 2 [Member] | Debt Securities Issued By States Of The United States And Political Subdivisions Of The States [Member]
Investments	2,067	2,093
Level 2 [Member] | Debt Securities Issued By Foreign Governments [Member]
Investments	0
Level 2 [Member] | Corporate Debt Securities [Member]
Investments	80,163	91,467
Level 3 [Member]
Total assets	0	0
Business Combination, Contingent Consideration, Liability	12,000	15,000
Derivative Liability, Fair Value, Gross Liability	0	0
Financial Liabilities Fair Value Disclosure	12,000	15,000
Level 3 [Member] | Money Market Funds [Member]
Cash	0	0
Level 3 [Member] | Bank Time Deposits [Member]
Cash	0	0
Level 3 [Member] | Commercial Paper [Member]
Cash	0
Level 3 [Member] | Certificates of Deposit [Member]
Investments	0	0
Level 3 [Member] | Equity Securities [Member]
Investments	0	0
Level 3 [Member] | Debt Securities Issued By The U.S Treasury And Other U.S Government Corporations And Agencies [Member]
Investments	0	0
Level 3 [Member] | Debt Securities Issued By States Of The United States And Political Subdivisions Of The States [Member]
Investments	0	0
Level 3 [Member] | Debt Securities Issued By Foreign Governments [Member]
Investments	0
Level 3 [Member] | Corporate Debt Securities [Member]
Investments	$0	$0

Fair_Value_Measurements_Fair_V1

Fair Value Measurements Fair Value Measurements (Schedule Of Changes In Fair Value Of Level 3 Financial Assets) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	$12,000	$15,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease)	-3,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net	$0

Fair_Value_Measurements_Fair_V2

Fair Value Measurements Fair Value Measurements (Derivative Summary) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value Measurements [Abstract]
Derivative Liability	$742	$742

Goodwill_And_Intangible_Assets2

Goodwill And Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill	$669,374,000		$635,675,000
Amortization expense	16,900,000	10,000,000
Estimated future amortization expense in year 2015	66,100,000
Estimated future amortization expense in year 2016	60,300,000
Estimated future amortization expense in year 2017	47,000,000
Estimated future amortization expense in year 2018	32,100,000
Estimated future amortization expense in year 2019	24,000,000
Estimated future amortization expense thereafter	83,900,000
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets minimum useful life (years)	1 year
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets minimum useful life (years)	20 years
Business Cloud Services Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	427,987,000		390,063,000
Digital Media Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	$241,387,000		$245,612,000

Goodwill_And_Intangible_Assets3

Goodwill And Intangible Assets (Changes In Carrying Amounts Of Goodwill And Other Intangible Assets) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Goodwill [Line Items]
Balance as of January 1, 2015	$635,675
Goodwill, Acquired During Period	40,557
Goodwill, Purchase Accounting Adjustments	-800
Foreign Exchange Translation	-6,094
Balance as of March 31, 2015	669,374
Business Cloud Services Segment [Member]
Goodwill [Line Items]
Balance as of January 1, 2015	390,063
Goodwill, Acquired During Period	40,557
Goodwill, Purchase Accounting Adjustments	3,436
Foreign Exchange Translation	-6,069
Balance as of March 31, 2015	427,987
Digital Media Segment [Member]
Goodwill [Line Items]
Balance as of January 1, 2015	245,612
Goodwill, Acquired During Period	0
Goodwill, Purchase Accounting Adjustments	-4,200
Foreign Exchange Translation	-25
Balance as of March 31, 2015	$241,387

Goodwill_And_Intangible_Assets4

Goodwill And Intangible Assets (Indefinite Intangible Assets) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Intangible assets	$32,811	$32,811
Trade Names [Member]
Intangible assets	27,379	27,379
Other Intangible Assets [Member]
Intangible assets	$5,432	$5,432

Goodwill_And_Intangible_Assets5

Goodwill And Intangible Assets (Schedule Of Intangible Assets Subject To Amortization) (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Historical Cost	$449,007	$416,494
Accumulated Amortization	-152,522	-137,505
Net	296,485	278,989
Trade Names [Member]
Historical Cost	97,112	94,770
Accumulated Amortization	-18,637	-16,598
Net	78,475	78,172
Weighted-Average Amortization Period, years	14 years 2 months 12 days	14 years 6 months
Patents And Patent Licenses [Member]
Historical Cost	63,136	62,940
Accumulated Amortization	-40,168	-38,013
Net	22,968	24,927
Weighted-Average Amortization Period, years	8 years 3 months 18 days	9 years
Customer Relationships [Member]
Historical Cost	260,380	230,424
Accumulated Amortization	-76,052	-66,658
Net	184,328	163,766
Weighted-Average Amortization Period, years	9 years	9 years 3 months 18 days
Other Purchased Intangibles [Member]
Historical Cost	28,379	28,360
Accumulated Amortization	-17,665	-16,236
Net	$10,714	$12,124
Weighted-Average Amortization Period, years	4 years 3 months 18 days	4 years 3 months 18 days

Long_Term_Debt_Details

Long Term Debt (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Jun. 10, 2014	Jul. 26, 2012
Debt Instrument [Line Items]
Debt Instrument, Convertible, Carrying Amount of Equity Component			$37,700,000
Long-term Debt	595,266,000	593,350,000
Long-term Debt, Current Maturities	0
Total long-term debt, less current portion	595,266,000
Long-term Debt, Fair Value	732,800,000	711,100,000
Interest Paid	10,000,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	26-Jul-12
Debt Instrument, Face Amount	250,000,000
Debt Instrument, Interest Rate, Stated Percentage	8.00%
Debt Instrument, Maturity Date	1-Aug-20
Proceeds from Debt, Net of Issuance Costs	245,000,000
Debt Instrument, Unamortized Discount	3,700,000			5,000,000
Unamortized Debt Issuance Expense	1,100,000
Debt Instrument, Frequency of Periodic Payment	semi-annually
Debt Instrument, Date of First Required Payment	1-Feb-13
Debt Instrument, Call Date, Earliest	1-Aug-16
Long-term Debt	246,324,000
Long-term Debt, Fair Value	265,400,000
Convertible Debt Securities [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	10-Jun-14
Debt Instrument, Face Amount	402,500,000
Debt Instrument, Interest Rate, Stated Percentage	3.25%
Debt Instrument, Maturity Date	15-Jun-29
Proceeds from Debt, Net of Issuance Costs	391,400,000
Debt Instrument, Unamortized Discount	53,600,000		59,000,000
Debt Instrument, Convertible, Remaining Discount Amortization Period	6 years 2 months 16 days
Debt Issuance Cost	11,700,000
Unamortized Debt Issuance Expense	9,100,000
Interest Expense, Debt	5,300,000
Debt Instrument, Frequency of Periodic Payment	semiannually
Long-term Debt	348,942,000
Long-term Debt, Fair Value	$467,400,000

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2014
Income Taxes [Line Items]
U.S. federal statutory rate	35.00%
Effective income tax rate	29.40%
Income before income taxes, domestic operations	$11.60	$11.60
Income before income taxes, foreign operations	19.4	25.4
Liabilities for uncertain income tax positions	40.1					37.6
Cash paid for income taxes	8.1
Prepaid tax payments	$10.50					$5.80
California Franchise Tax Board [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination			2011	2010	2009
Internal Revenue Service (IRS) [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination			2011	2010	2009
Canada Revenue Agency [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination			2011	2010
New York City Department of Finance [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination			2011	2010	2009

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	0 Months Ended		3 Months Ended
In Millions, except Share data, unless otherwise specified	6-May-15	Feb. 10, 2015	Mar. 31, 2015
Class of Stock [Line Items]
Stock Repurchased			2,100,000
Treasury Stock, Value, Acquired, Cost Method			$58.60
Dividend amount to be paid, per common share	$0.30	$0.29
Dividend, declaration date	6-May-15	10-Feb-15
Dividend, date to be paid	3-Jun-15	9-Mar-15
Dividend, date of record	19-May-15	23-Feb-15
Shares Paid for Tax Withholding for Share Based Compensation			11,678
2012 Repurchase Program [Member]
Class of Stock [Line Items]
Maximum number of shares authorized to be repurchased			5,000,000
Stock Repurchased			0

Stock_Options_And_Employee_Sto2

Stock Options And Employee Stock Purchase Plan (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Allocated Share-based Compensation Expense	$3,004,000	$2,384,000
Number of options outstanding	722,849		725,649
Number of options granted	0
Cash received upon the issuance of common stock	61,000	55,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	100,000	12,300,000
Stock Options [Member]
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	600,000		800,000
Restricted Stock And Restricted Stock Unit (RSU) [Member]
Allocated Share-based Compensation Expense	3,000,000	1,900,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	28,500,000		24,100,000
Restricted Stock [Member]
Shares, Granted	24,000
Weighted-Average Grant-Date Fair Value, Granted	$59.86
Number of stocks outstanding	784,062		814,050
Restricted Stock Units (RSUs) [Member]
Shares, Granted	8,000
Number of stocks outstanding	106,294		102,294
1997 Stock Option Plan [Member]
Additional shares authorized for issuance	840,000
Maximum issuance of common stock	12,000,000
1997 Stock Option Plan [Member] | Stock Options [Member]
Number of options outstanding	222,706
1997 Stock Option Plan [Member] | Restricted Stock [Member]
Number of stocks outstanding	0
2007 Stock Plan [Member]
Number of options outstanding	500,143
Number of stocks outstanding	106,924
Maximum issuance of common stock	4,500,000
Employee Stock Purchase Plan [Member] | Common Stock [Member]
Market value of common stock on the date of grant for incentive stock options	95.00%
Maximum earnings withheld by the employees	15.00%
Number of shares purchased under the plan	1,114	1,270
Cash received upon the issuance of common stock	$61,000	$55,000
Number of shares available for issuance	1,633,350
Minimum [Member]
Market value of common stock on the date of grant for incentive stock options	85.00%

Stock_Options_And_Employee_Sto3

Stock Options And Employee Stock Purchase Plan (Stock Options) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Number of Shares, Outstanding Beginning of Period	725,649
Number of options granted	0
Number of Shares, Exercised	-2,800
Number of Shares, Canceled	0
Number of Shares, Outstanding Ending of Period	722,849
Number of Shares, Exercisable	625,639
Number of Shares, Vested and expected to vest	714,217
Weighted-Average Exercise Price, Outstanding Beginning of Period	$24.29
Weighted-Average Exercise Price, Granted	$0
Weighted-Average Exercise Price, Exercised	$23.11
Weighted-Average Exercise Price, Canceled	$0
Weighted-Average Exercise Price, Outstanding Ending of Period	$24.30
Weighted-Average Exercise Price, Exercisable	$23.85
Weighted-Average Exercise Price, Vested and expected to vest	$24.25
Weighted-Average Remaining Contractual Term, Outstanding (in years)	3 years 7 months 17 days
Weighted-Average Remaining Contractual Term, Exercisable (in years)	3 years 2 months 27 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest (in years)	3 years 7 months 2 days
Aggregate Intrinsic Value, Outstanding	$29,913,357
Aggregate Intrinsic Value, Exercisable	26,170,104
Aggregate Intrinsic Value, Vested and expected to vest	29,589,392
Aggregate intrinsic values of options exercised	100,000	12,300,000
Stock Options [Member]
Unrecognized compensation cost related to non-vested awards granted	$600,000		$800,000
Weighted-average period to recognize compensation cost (in years)	1 year 1 month 24 days

Stock_Options_And_Employee_Sto4

Stock Options And Employee Stock Purchase Plan (Assumptions To Estimate Fair Value Of Stock Options) (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Estimated forfeiture rate	12.47%	11.07%

Stock_Options_And_Employee_Sto5

Stock Options And Employee Stock Purchase Plan (Restricted Stock) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Compensation cost recognized	$3,004,000	$2,384,000
Allocated Share-based Compensation Expense	3,004,000	2,384,000
Restricted Stock And Restricted Stock Unit (RSU) [Member]
Compensation cost recognized	3,000,000	1,900,000
Allocated Share-based Compensation Expense	3,000,000	1,900,000
Unrecognized compensation cost related to non-vested awards granted	28,500,000		24,100,000
Restricted Stock [Member]
Nonvested at January 1, 2015	814,050
Shares, Granted	24,000
Shares, Vested	-29,442
Shares, Canceled	-24,546
Nonvested at March 31, 2015	784,062
Weighted-Average Grant-Date Fair Value, Nonvested at January 1, 2015	$26.57
Weighted-Average Grant-Date Fair Value, Granted	$59.86
Weighted-Average Grant-Date Fair Value, Vested	$32.67
Weighted-Average Grant-Date Fair Value, Canceled	$26.35
Weighted-Average Grant-Date Fair Value, Nonvested at March 31, 2015	$27.36
Weighted-average period to recognize compensation cost (in years)	2 years 10 months 17 days
Restricted Stock Units (RSUs) [Member]
Nonvested at January 1, 2015	102,294
Shares, Granted	8,000
Shares, Vested	-4,000
Shares, Canceled	0
Nonvested at March 31, 2015	106,294
Share Based Compensation Equity Awards Other Than Options Expected To Vest Shares	82,906
Weighted-average period to recognize compensation cost (in years)	3 years 5 months 16 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	1 year 11 months 19 days
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Weighted Average Remaining Contractual Term	1 year 9 months 4 days
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Intrinsic Value	5,445,291
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding, Aggregate Intrinsic Value	$7,022,768

Stock_Options_And_Employee_Sto6

Stock Options And Employee Stock Purchase Plan (Allocation Of Share-Based Compensation Expense) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Allocated Share-based Compensation Expense	$3,004	$2,384
Cost Of Revenues [Member]
Allocated Share-based Compensation Expense	83	154
Sales And Marketing [Member]
Allocated Share-based Compensation Expense	584	491
Research, Development And Engineering [Member]
Allocated Share-based Compensation Expense	194	140
General And Administrative [Member]
Allocated Share-based Compensation Expense	$2,143	$1,599

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share Reconciliation [Abstract]
Net income attributable to j2 Global, Inc. common shareholders	$21,877	$28,765
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	360	635
Net earnings available to common shareholders	$21,517	$28,130
Weighted-average outstanding shares of common stock - basic	47,422,396	46,365,158
Dilutive effect of equity incentive plans	343,692	400,574
Weighted-average outstanding shares of common stock - diluted	47,766,088	46,765,732
Basic	$0.45	$0.61
Diluted	$0.45	$0.60
Share options excluded from the computation of diluted earnings per share	0

Segment_and_Geographic_Informa2

Segment and Geographic Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Total revenues	$161,253	$134,124
United States	333,102		317,206
Total long-lived assets	333,102		317,206
UNITED STATES
Total revenues	109,032	91,428
United States	227,561		216,099
Total long-lived assets	227,561		216,099
CANADA
Total revenues	18,139	17,508
IRELAND
Total revenues	9,935	10,511
All Other Countries [Member]
Total revenues	24,147	14,677
United States	105,541		101,107
Total long-lived assets	$105,541		$101,107

Segment_Information_Reportable

Segment Information Reportable Segment Information (Reconciliation of Total Segment Operating Income to Consolidated Operating Income) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Total revenues	$161,253	$134,124
Income from operations	40,530	41,585
Global Operating Costs	10,656	8,285
Business Cloud Services Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	118,061	100,830
Direct Costs By Segment	71,043	55,612
Income from operations	47,018	45,218
Digital Media Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	43,257	33,368
Direct Costs By Segment	39,089	28,716
Income from operations	4,168	4,652
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Total revenues	-65	-74
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income from operations	$51,186	$49,870

Segment_Information_Reportable1

Segment Information Reportable Segment Information (Total Assets, Capital Expenditures, Depreciation And Amortization) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	$1,698,236		$1,705,202
Property, Plant and Equipment, Additions	2,956	2,936
Depreciation, Depletion and Amortization, Nonproduction	21,287	13,137
Business Cloud Services Segment [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	918,180		883,587
Property, Plant and Equipment, Additions	1,280	1,875
Depreciation, Depletion and Amortization, Nonproduction	14,013	8,030
Digital Media Segment [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	372,757		378,381
Property, Plant and Equipment, Additions	1,622	956
Depreciation, Depletion and Amortization, Nonproduction	7,080	4,918
Operating Segments [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	1,290,937		1,261,968
Property, Plant and Equipment, Additions	2,902	2,831
Depreciation, Depletion and Amortization, Nonproduction	21,093	12,948
Corporate [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	407,299		443,234
Property, Plant and Equipment, Additions	54	105
Depreciation, Depletion and Amortization, Nonproduction	$194	$189

Unrestricted_Subsidiaries_Unre

Unrestricted Subsidiaries Unrestricted Subsidiaries (Financial Position) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Cash and cash equivalents	$392,017	$433,663	$208,068	$207,801
Accounts receivable	82,572	91,699
Prepaid expenses and other current assets	24,611	22,602
Deferred income taxes	2,146	2,013
Total current assets	587,105	646,183
Property and equipment, net	36,618	38,217
Tradenames, net	105,854	105,551
Patent and patent licenses, net	22,968	24,927
Customer Relationships, Net	184,328	163,766
Goodwill	669,374	635,675
Other purchased intangibles, net	16,146	17,556
Other assets	14,125	12,819
Total assets	1,698,236	1,705,202
Accounts payable and accrued expenses	81,008	95,310
Income taxes payable	2,959	0
Deferred revenue, current	73,278	63,457
Deferred Tax Liabilities, Net, Current	185	342
Total current liabilities	157,871	159,367
Deferred income taxes	63,109	61,960
Other long-term liabilities	17,915	22,416
Total liabilities	883,277	884,967
Commitments and contingencies
Common Stock, Value, Issued	474	474
Additional paid-in capital	275,420	273,304
Retained Earnings (Accumulated Deficit)	561,049	553,584
Accumulated Other Comprehensive Income (Loss), Net of Tax	-21,984	-7,127
Total liabilities and stockholdersb equity	1,698,236	1,705,202
Unrestricted Subsidiaries [Member]
Cash and cash equivalents	39,314	27,944
Accounts receivable	49,837	57,005
Prepaid expenses and other current assets	3,527	2,986
Deferred income taxes	5,817	5,292
Total current assets	98,495	93,227
Property and equipment, net	13,061	12,834
Tradenames, net	68,626	70,310
Patent and patent licenses, net		24,007	22,088
Customer Relationships, Net	52,781	55,925
Goodwill	241,388	245,613
Other purchased intangibles, net	7,899	8,901
Other assets	1,639	1,706
Total assets	505,977	512,523
Accounts payable and accrued expenses	35,634	40,296
Income taxes payable	0	316
Deferred revenue, current	6,086	5,277
Total current liabilities	41,720	45,889
Deferred income taxes	18,253	17,397
Other long-term liabilities	13,638	16,243
Total liabilities	183,611	189,529
Additional paid-in capital	315,427	317,932
Retained Earnings (Accumulated Deficit)	7,478	6,051
Accumulated Other Comprehensive Income (Loss), Net of Tax	-539	-989
Stockholders' Equity Attributable to Parent	322,366	322,994
Total liabilities and stockholdersb equity	505,977	512,523
Notes Payable, Related Parties, Noncurrent		$110,000			$110,000

Unrestricted_Subsidiaries_Unre1

Unrestricted Subsidiaries Unrestricted Subsidiaries (Results of Operations) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Total revenues	$161,253	$134,124
Cost of revenues	28,186	23,388
Gross Profit	133,067	110,736
Selling and Marketing Expense	37,590	32,959
Research and Development Expense	8,447	7,213
General and Administrative Expense	46,500	28,979
Operating Expenses	92,537	69,151
Income from operations	40,530	41,585
Interest expense (income), net	10,313	4,948
Other expense (income), net	-784	-319
Income (loss) before income taxes	31,001	36,956
Income Tax Expense (Benefit)	9,124	8,191
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	21,877	28,765
Unrestricted Subsidiaries [Member]
Total revenues	44,420	33,368
Cost of revenues	4,354	3,852
Gross Profit	40,066	29,516
Selling and Marketing Expense	17,662	14,958
Research and Development Expense	1,901	1,072
General and Administrative Expense	17,979	8,834
Operating Expenses	37,542	24,864
Income from operations	2,524	4,652
Interest expense (income), net	2,517	1
Other expense (income), net	243	-342
Income (loss) before income taxes	-236	4,993
Income Tax Expense (Benefit)	319	2,027
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	($555)	$2,966

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income Roll Forward (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) Roll Forward [Line Items]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$9,768		$9,388
Unrealized gain on available-for-sale investments, net of tax (benefit)	387
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	-15,237
Other Comprehensive Income Loss Arising During Period Total Net of Tax	-14,850
Foreign currency translation adjustment, net of tax (benefit)	-15,237	837
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	-7,127
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	-21,984
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	-7
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax	0
Other Comprehensive Income Loss Reclassification Adjustments Total Net of Tax	-7
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	380	-2,640
Other Comprehensive Income (Loss), Net of Tax	-14,857	-1,803
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	($31,752)		($16,515)

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Reclassification out of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]
Other expense (income), net	($784)	($319)
Income Tax Expense (Benefit)	9,124	8,191
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	-7
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0
Other Comprehensive Income Loss Reclassification Adjustments Total Net of Tax	-7
Accumulated Net Unrealized Investment Gain (Loss) [Member]
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]
Other expense (income), net	-11
Income Tax Expense (Benefit)	$4

Condensed_Consolidating_Financ2

Condensed Consolidating Financials Condensed Balance Sheet (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Cash and cash equivalents	$392,017	$433,663	$208,068	$207,801
Short-term investments	85,759	96,206
Accounts receivable, net of allowances of $3,802 and $3,685, respectively	82,572	91,699
Prepaid expenses and other current assets	24,611	22,602
Deferred income taxes	2,146	2,013
Due from Affiliate, Current	0	0
Total current assets	587,105	646,183
Long-term investments	61,718	60,508
Property and equipment, net	36,618	38,217
Tradenames, net	105,854	105,551
Patent and patent licenses, net	22,968	24,927
Customer Relationships, Net	184,328	163,766
Goodwill	669,374	635,675
Other purchased intangibles, net	16,146	17,556
Investments in and Advances to Affiliates, Amount of Equity	0	0
Other assets	14,125	12,819
Total assets	1,698,236	1,705,202
Accounts payable and accrued expenses	81,008	95,310
Income taxes payable	2,959	0
Deferred revenue, current	73,278	63,457
Capital Lease Obligations, Current	441	258
Deferred Tax Liabilities, Net, Current	185	342
Due to Affiliate, Current	0	0
Total current liabilities	157,871	159,367
Long-term Debt	595,266	593,350
Capital Lease Obligations, Noncurrent	66	141
Liability for uncertain tax positions	40,145	37,551
Deferred income taxes	63,109	61,960
Deferred revenue, non-current	8,905	10,182
Other long-term liabilities	17,915	22,416
Total liabilities	883,277	884,967
Commitments and contingencies
Common Stock, Value, Issued	474	474
Additional paid-in capital	275,420	273,304
Retained Earnings (Accumulated Deficit)	561,049	553,584
Accumulated Other Comprehensive Income (Loss), Net of Tax	-21,984	-7,127
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	814,959	820,235
Total liabilities and stockholdersb equity	1,698,236	1,705,202
Series A Preferred Stock [Member]
Preferred stock, $0.01 par value	0	0
Series B Preferred Stock [Member]
Preferred stock, $0.01 par value	0	0
j2 Global, Inc. [Member]
Cash and cash equivalents	199,815	226,790	0	0
Short-term investments	41,880	47,880
Accounts receivable, net of allowances of $3,802 and $3,685, respectively	326	0
Prepaid expenses and other current assets	737	776
Deferred income taxes	896	1,271
Due from Affiliate, Current	110,000	110,000
Total current assets	353,654	386,717
Long-term investments	52,619	55,452
Property and equipment, net	0	0
Tradenames, net	0	0
Patent and patent licenses, net	0	0
Customer Relationships, Net	0	0
Goodwill	0	0
Other purchased intangibles, net	0	0
Investments in and Advances to Affiliates, Amount of Equity	839,108	826,289
Other assets	9,061	9,328
Total assets	1,254,442	1,277,786
Accounts payable and accrued expenses	4,798	2,834
Income taxes payable	2,959	0
Deferred revenue, current	0	0
Capital Lease Obligations, Current	0	0
Deferred Tax Liabilities, Net, Current	43	0
Due to Affiliate, Current	48,268	76,366
Total current liabilities	56,068	79,200
Long-term Debt	348,942	347,163
Capital Lease Obligations, Noncurrent	0	0
Liability for uncertain tax positions	0	0
Deferred income taxes	24,685	21,728
Deferred revenue, non-current	0	0
Other long-term liabilities	1,071	744
Total liabilities	430,766	448,835
Common Stock, Value, Issued	474	474
Additional paid-in capital	275,420	273,304
Retained Earnings (Accumulated Deficit)	547,697	555,158
Accumulated Other Comprehensive Income (Loss), Net of Tax	85	15
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	823,676	828,951
Total liabilities and stockholdersb equity	1,254,442	1,277,786
j2 Cloud Services, Inc. [Member]
Cash and cash equivalents	17,516	36,810	45,261	34,406
Short-term investments	43,819	48,261
Accounts receivable, net of allowances of $3,802 and $3,685, respectively	12,059	11,167
Prepaid expenses and other current assets	14,472	12,689
Deferred income taxes	0	0
Due from Affiliate, Current	91,474	74,938
Total current assets	179,340	183,865
Long-term investments	9,099	5,056
Property and equipment, net	7,567	8,011
Tradenames, net	10,199	10,231
Patent and patent licenses, net	850	886
Customer Relationships, Net	1,952	2,206
Goodwill	52,131	52,131
Other purchased intangibles, net	4,264	4,276
Investments in and Advances to Affiliates, Amount of Equity	909,081	900,681
Other assets	3,063	1,368
Total assets	1,177,546	1,168,711
Accounts payable and accrued expenses	23,185	28,414
Income taxes payable	103	0
Deferred revenue, current	20,774	23,091
Capital Lease Obligations, Current	0	0
Deferred Tax Liabilities, Net, Current	0	0
Due to Affiliate, Current	0	0
Total current liabilities	44,062	51,505
Long-term Debt	246,324	246,187
Capital Lease Obligations, Noncurrent	0	0
Liability for uncertain tax positions	40,145	37,551
Deferred income taxes	0	-1,837
Deferred revenue, non-current	7,009	8,187
Other long-term liabilities	898	829
Total liabilities	338,438	342,422
Common Stock, Value, Issued	0	0
Additional paid-in capital	233,836	232,340
Retained Earnings (Accumulated Deficit)	595,691	584,591
Accumulated Other Comprehensive Income (Loss), Net of Tax	9,581	9,358
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	839,108	826,289
Total liabilities and stockholdersb equity	1,177,546	1,168,711
Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	174,686	170,063	162,807	173,395
Short-term investments	60	65
Accounts receivable, net of allowances of $3,802 and $3,685, respectively	70,187	80,532
Prepaid expenses and other current assets	9,505	9,137
Deferred income taxes	1,250	742
Due from Affiliate, Current	0	1,428
Total current assets	255,688	261,967
Long-term investments	0	0
Property and equipment, net	29,051	30,206
Tradenames, net	95,655	95,320
Patent and patent licenses, net	22,118	24,041
Customer Relationships, Net	182,376	161,560
Goodwill	617,243	583,544
Other purchased intangibles, net	11,882	13,280
Investments in and Advances to Affiliates, Amount of Equity	8,717	8,716
Other assets	2,001	2,123
Total assets	1,224,731	1,180,757
Accounts payable and accrued expenses	53,025	64,062
Income taxes payable	0	0
Deferred revenue, current	52,504	40,366
Capital Lease Obligations, Current	441	258
Deferred Tax Liabilities, Net, Current	142	342
Due to Affiliate, Current	153,206	110,000
Total current liabilities	259,318	215,028
Long-term Debt	0	0
Capital Lease Obligations, Noncurrent	66	141
Liability for uncertain tax positions	0	0
Deferred income taxes	38,424	42,069
Deferred revenue, non-current	1,896	1,995
Other long-term liabilities	15,946	20,843
Total liabilities	315,650	280,076
Common Stock, Value, Issued	0	0
Additional paid-in capital	421,684	421,676
Retained Earnings (Accumulated Deficit)	519,047	495,505
Accumulated Other Comprehensive Income (Loss), Net of Tax	-31,650	-16,500
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	909,081	900,681
Total liabilities and stockholdersb equity	1,224,731	1,180,757
Consolidation, Eliminations [Member]
Cash and cash equivalents	0	0	0	0
Short-term investments	0	0
Accounts receivable, net of allowances of $3,802 and $3,685, respectively	0	0
Prepaid expenses and other current assets	-103	0
Deferred income taxes	0	0
Due from Affiliate, Current	-201,474	-186,366
Total current assets	-201,577	-186,366
Long-term investments	0	0
Property and equipment, net	0	0
Tradenames, net	0	0
Patent and patent licenses, net	0	0
Customer Relationships, Net	0	0
Goodwill	0	0
Other purchased intangibles, net	0	0
Investments in and Advances to Affiliates, Amount of Equity	-1,756,906	-1,735,686
Other assets	0	0
Total assets	-1,958,483	-1,922,052
Accounts payable and accrued expenses	0	0
Income taxes payable	-103	0
Deferred revenue, current	0	0
Capital Lease Obligations, Current	0	0
Deferred Tax Liabilities, Net, Current	0	0
Due to Affiliate, Current	-201,474	-186,366
Total current liabilities	-201,577	-186,366
Long-term Debt	0	0
Capital Lease Obligations, Noncurrent	0	0
Liability for uncertain tax positions	0	0
Deferred income taxes	0	0
Deferred revenue, non-current	0	0
Other long-term liabilities	0	0
Total liabilities	-201,577	-186,366
Common Stock, Value, Issued	0	0
Additional paid-in capital	-655,520	-654,016
Retained Earnings (Accumulated Deficit)	-1,101,386	-1,081,670
Accumulated Other Comprehensive Income (Loss), Net of Tax	0	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	-1,756,906	-1,735,686
Total liabilities and stockholdersb equity	($1,958,483)	($1,922,052)

Condensed_Consolidating_Financ3

Condensed Consolidating Financials Condensed Income Statement (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Total revenues	$161,253	$134,124
Interest expense (income), net	10,313	4,948
Other expense (income), net	-784	-319
Income Tax Expense (Benefit)	9,124	8,191
Cost of revenues	28,186	23,388
Gross Profit	133,067	110,736
Selling and Marketing Expense	37,590	32,959
Research and Development Expense	8,447	7,213
General and Administrative Expense	46,500	28,979
Operating Expenses	92,537	69,151
Income from operations	40,530	41,585
Income (Loss) from Subsidiaries, before Tax	0	0
Income (loss) before income taxes	31,001	36,956
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	21,877	28,765
Net Income (Loss) Attributable to Parent	21,877	28,765
j2 Global, Inc. [Member]
Total revenues	0	0
Interest expense (income), net	2,588	0
Other expense (income), net	-12	0
Income Tax Expense (Benefit)	-2,381	0
Cost of revenues	0	0
Gross Profit	0	0
Selling and Marketing Expense	0	0
Research and Development Expense	0	0
General and Administrative Expense	4,179	0
Operating Expenses	4,179	0
Income from operations	-4,179	0
Income (Loss) from Subsidiaries, before Tax	26,251	0
Income (loss) before income taxes	19,496	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	21,877	0
j2 Cloud Services, Inc. [Member]
Total revenues	54,619	51,193
Interest expense (income), net	5,107	5,103
Other expense (income), net	339	-32
Income Tax Expense (Benefit)	10,448	3,143
Cost of revenues	15,528	19,953
Gross Profit	39,091	31,240
Selling and Marketing Expense	9,780	9,013
Research and Development Expense	3,855	3,620
General and Administrative Expense	6,850	9,570
Operating Expenses	20,485	22,203
Income from operations	18,606	9,037
Income (Loss) from Subsidiaries, before Tax	23,539	27,942
Income (loss) before income taxes	36,699	31,908
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	26,251	28,765
Non-Guarantor Subsidiaries [Member]
Total revenues	116,435	96,634
Interest expense (income), net	2,618	-155
Other expense (income), net	-1,111	-287
Income Tax Expense (Benefit)	1,057	5,048
Cost of revenues	22,394	17,065
Gross Profit	94,041	79,569
Selling and Marketing Expense	27,875	24,019
Research and Development Expense	4,592	3,593
General and Administrative Expense	35,471	19,409
Operating Expenses	67,938	47,021
Income from operations	26,103	32,548
Income (Loss) from Subsidiaries, before Tax	0	0
Income (loss) before income taxes	24,596	32,990
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	23,539	27,942
Consolidation, Eliminations [Member]
Total revenues	-9,801	-13,703
Interest expense (income), net	0	0
Other expense (income), net	0	0
Income Tax Expense (Benefit)	0	0
Cost of revenues	-9,736	-13,630
Gross Profit	-65	-73
Selling and Marketing Expense	-65	-73
Research and Development Expense	0	0
General and Administrative Expense	0	0
Operating Expenses	-65	-73
Income from operations	0	0
Income (Loss) from Subsidiaries, before Tax	-49,790	-27,942
Income (loss) before income taxes	-49,790	-27,942
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	($49,790)	($27,942)

Condensed_Consolidating_Financ4

Condensed Consolidating Financials Condensed Comprehensive Income Statement (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$21,877	$28,765
Foreign currency translation adjustment, net of tax (benefit)	-15,237	837
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	380	-2,640
Other Comprehensive Income (Loss), Net of Tax	-14,857	-1,803
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	7,020	26,962
Total revenues	161,253	134,124
j2 Global, Inc. [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	21,877	0
Foreign currency translation adjustment, net of tax (benefit)	0	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	311	0
Other Comprehensive Income (Loss), Net of Tax	311	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	22,188	0
Total revenues	0	0
j2 Cloud Services, Inc. [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	26,251	28,765
Foreign currency translation adjustment, net of tax (benefit)	0	-248
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	69	-2,649
Other Comprehensive Income (Loss), Net of Tax	69	-2,897
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	26,320	25,868
Total revenues	54,619	51,193
Non-Guarantor Subsidiaries [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	23,539	27,942
Foreign currency translation adjustment, net of tax (benefit)	-15,237	1,085
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	0	9
Other Comprehensive Income (Loss), Net of Tax	-15,237	1,094
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	8,302	29,036
Total revenues	116,435	96,634
Consolidation, Eliminations [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	-49,790	-27,942
Foreign currency translation adjustment, net of tax (benefit)	0	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	0	0
Other Comprehensive Income (Loss), Net of Tax	0	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	-49,790	-27,942
Total revenues	($9,801)	($13,703)

Condensed_Consolidating_Financ5

Condensed Consolidating Financials Condensed Statement of Cash Flows (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$21,877,000	$28,765,000
Depreciation and amortization	21,287,000	13,137,000
Accretion (Amortization) of Discounts and Premiums, Investments	273,000	352,000
Amortization of financing costs and discounts	2,222,000	162,000
Share-based Compensation	3,004,000	2,384,000
Excess Tax Benefit from Share-based Compensation, Operating Activities	-334,000	-4,082,000
Provision for doubtful accounts	1,610,000	732,000
Deferred income taxes	-494,000	-211,000
(Gain) loss on sale of available-for-sale investments	-24,000	-40,000
Increase (Decrease) in Accounts Receivable	9,254,000	8,452,000
Increase (Decrease) in Prepaid Expense and Other Assets	-4,000	-1,657,000
Increase (Decrease) in Other Operating Assets	25,000	147,000
Accounts payable and accrued expenses	-12,902,000	-16,228,000
Income taxes payable	-1,283,000	4,723,000
Deferred revenue	-1,340,000	205,000
Liability for uncertain tax positions	2,595,000	351,000
Other	-50,000	102,000
Net Cash Provided by (Used in) Operating Activities	45,716,000	37,294,000
Maturity of certificates of deposit	0	8,210,000
Sales of available-for-sale investments	28,994,000	29,705,000
Payments to Acquire Available-for-sale Securities	-19,819,000	-11,213,000
Payments to Acquire Property, Plant, and Equipment	-2,956,000	-2,936,000
Payments to Acquire Businesses, Net of Cash Acquired	-72,215,000	-49,068,000
Payments to Acquire Intangible Assets	-327,000	-915,000
Payments to Acquire Interest in Subsidiaries and Affiliates	0	0
Net Cash Provided by (Used in) Investing Activities	-66,323,000	-26,217,000
Payments for Repurchase of Common Stock	-705,000	-4,042,000
Issuance of common stock under employee stock purchase plan	61,000	55,000
Exercise of stock options	65,000	4,926,000
Payments of Dividends	-14,110,000	-12,418,000
Excess tax benefits from share-based compensation	334,000	4,082,000
Deferred payments for acquisitions	-2,356,000	-3,314,000
Proceeds from (Payments for) Other Financing Activities	-50,000	0
Payments of Distributions to Affiliates	0	0
Net Cash Provided by (Used in) Financing Activities	-16,761,000	-10,711,000
Effect of exchange rate changes on cash and cash equivalents	-4,278,000	-99,000
Cash and Cash Equivalents, Period Increase (Decrease)	-41,646,000	267,000
Cash and cash equivalents	392,017,000	208,068,000
j2 Global, Inc. [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	21,877,000	0
Net Cash Provided by (Used in) Operating Activities	-8,106,000	0
Maturity of certificates of deposit		0
Sales of available-for-sale investments	21,994,000	0
Payments to Acquire Available-for-sale Securities	-13,276,000	0
Payments to Acquire Property, Plant, and Equipment	0	0
Payments to Acquire Businesses, Net of Cash Acquired	0	0
Payments to Acquire Intangible Assets	0	0
Payments to Acquire Interest in Subsidiaries and Affiliates	0	0
Net Cash Provided by (Used in) Investing Activities	8,718,000	0
Payments for Repurchase of Common Stock	-705,000	0
Issuance of common stock under employee stock purchase plan	61,000	0
Exercise of stock options	65,000	0
Payments of Dividends	-14,110,000	0
Excess tax benefits from share-based compensation	334,000	0
Deferred payments for acquisitions	0	0
Proceeds from (Payments for) Other Financing Activities	0	0
Payments of Distributions to Affiliates	13,232,000	0
Net Cash Provided by (Used in) Financing Activities	-27,587,000	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	-26,975,000	0
Cash and cash equivalents	199,815,000	0
j2 Cloud Services, Inc. [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	26,251,000	28,765,000
Net Cash Provided by (Used in) Operating Activities	6,745,000	-3,119,000
Maturity of certificates of deposit		8,210,000
Sales of available-for-sale investments	7,000,000	24,105,000
Payments to Acquire Available-for-sale Securities	-6,543,000	-11,213,000
Payments to Acquire Property, Plant, and Equipment	-308,000	-454,000
Payments to Acquire Businesses, Net of Cash Acquired	1,459,000	0
Payments to Acquire Intangible Assets	-5,000	-591,000
Payments to Acquire Interest in Subsidiaries and Affiliates	0	-1,021,000
Net Cash Provided by (Used in) Investing Activities	1,603,000	19,036,000
Payments for Repurchase of Common Stock	0	-4,042,000
Issuance of common stock under employee stock purchase plan	0	55,000
Exercise of stock options	0	4,926,000
Payments of Dividends	0	-12,418,000
Excess tax benefits from share-based compensation	0	4,082,000
Deferred payments for acquisitions	-544,000	0
Proceeds from (Payments for) Other Financing Activities	0	0
Payments of Distributions to Affiliates	27,098,000	-2,335,000
Net Cash Provided by (Used in) Financing Activities	-27,642,000	-5,062,000
Effect of exchange rate changes on cash and cash equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	-19,294,000	10,855,000
Cash and cash equivalents	17,516,000	45,261,000
Non-Guarantor Subsidiaries [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	23,539,000	27,942,000
Net Cash Provided by (Used in) Operating Activities	47,077,000	40,413,000
Maturity of certificates of deposit		0
Sales of available-for-sale investments	0	5,600,000
Payments to Acquire Available-for-sale Securities	0	0
Payments to Acquire Property, Plant, and Equipment	-2,648,000	-2,482,000
Payments to Acquire Businesses, Net of Cash Acquired	-73,674,000	-49,068,000
Payments to Acquire Intangible Assets	-322,000	-324,000
Payments to Acquire Interest in Subsidiaries and Affiliates	0	1,021,000
Net Cash Provided by (Used in) Investing Activities	-76,644,000	-45,253,000
Payments for Repurchase of Common Stock	0	0
Issuance of common stock under employee stock purchase plan	0	0
Exercise of stock options	0	0
Payments of Dividends	0	0
Excess tax benefits from share-based compensation	0	0
Deferred payments for acquisitions	-1,812,000	-3,314,000
Proceeds from (Payments for) Other Financing Activities	-50,000	0
Payments of Distributions to Affiliates	-40,330,000	2,335,000
Net Cash Provided by (Used in) Financing Activities	38,468,000	-5,649,000
Effect of exchange rate changes on cash and cash equivalents	-4,278,000	-99,000
Cash and Cash Equivalents, Period Increase (Decrease)	4,623,000	-10,588,000
Cash and cash equivalents	174,686,000	162,807,000
Consolidation, Eliminations [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	-49,790,000	-27,942,000
Net Cash Provided by (Used in) Operating Activities	0	0
Maturity of certificates of deposit		0
Sales of available-for-sale investments	0	0
Payments to Acquire Available-for-sale Securities	0	0
Payments to Acquire Property, Plant, and Equipment	0	0
Payments to Acquire Businesses, Net of Cash Acquired	0	0
Payments to Acquire Intangible Assets	0	0
Payments to Acquire Interest in Subsidiaries and Affiliates	0	0
Net Cash Provided by (Used in) Investing Activities	0	0
Payments for Repurchase of Common Stock	0	0
Issuance of common stock under employee stock purchase plan	0	0
Exercise of stock options	0	0
Payments of Dividends	0	0
Excess tax benefits from share-based compensation	0	0
Deferred payments for acquisitions	0	0
Proceeds from (Payments for) Other Financing Activities	0	0
Payments of Distributions to Affiliates	0	0
Net Cash Provided by (Used in) Financing Activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	0	0
Cash and cash equivalents	$0	$0

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	0 Months Ended
	6-May-15	Feb. 10, 2015
Subsequent Events [Abstract]
Dividends declared date	6-May-15	10-Feb-15
Dividend amount to be paid, per common share	$0.30	$0.29
Date dividend is payable	3-Jun-15	9-Mar-15
Date shareholders must be on record for dividend	19-May-15	23-Feb-15