Ziff Davis (ZD) 10-Q 10 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	9 Months Ended
	Sep. 30, 2014	Nov. 04, 2014
Document And Entity Information [Abstract]	'	'
Entity Registrant Name	'J2 GLOBAL, INC.	'
Entity Central Index Key	'0001084048	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	47,806,494

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'	'	'	'	'
Cash and cash equivalents	$514,997	'	$207,801	$199,181	$218,680
Short-term investments	107,418	'	90,789	'	'
Accounts receivable, net of allowances of $3,582 and $4,105, respectively	75,016	'	67,245	'	'
Prepaid expenses and other current assets	24,817	'	20,064	'	'
Deferred income taxes	7,451	'	3,126	'	'
Total current assets	729,699	'	389,025	'	'
Long-term investments	61,415	'	47,351	'	'
Property and equipment, net	38,787	'	31,200	'	'
Tradenames, net	84,193	'	83,108	'	'
Patent and patent licenses, net	26,892	'	28,530	'	'
Customer relationships, net	144,398	'	100,980	'	'
Goodwill	533,403	'	457,422	'	'
Other purchased intangibles, net	8,021	'	10,915	'	'
Deferred income taxes	0	'	1,845	'	'
Other assets	13,196	'	3,413	'	'
Total assets	1,640,004	'	1,153,789	'	'
LIABILITIES AND STOCKHOLDERS' EQUITY	'	'	'	'	'
Accounts payable and accrued expenses	70,781	'	69,570	'	'
Income taxes payable	1,187	'	1,569	'	'
Deferred revenue, current	57,399	'	36,326	'	'
Liability for uncertain tax positions	0	'	5,535	'	'
Deferred income taxes	591	'	1,892	'	'
Other current liabilities	540	'	0	'	'
Total current liabilities	130,498	'	114,892	'	'
Long-term Debt	591,464	'	245,670	'	'
Liability for uncertain tax positions	35,793	'	38,329	'	'
Deferred income taxes	61,710	'	35,833	'	'
Deferred revenue, non-current	10,945	'	11,189	'	'
Other long-term liabilities	6,033	'	1,458	'	'
Total liabilities	836,443	'	447,371	'	'
Commitments and contingencies	0	'	0	'	'
Common stock, $0.01 par value. Authorized 95,000,000; total issued and outstanding 46,892,811 and 46,105,076 shares, respectively	469	'	461	'	'
Additional paid-in capital	270,857	'	216,872	'	'
Retained Earnings (Accumulated Deficit)	535,567	'	484,850	'	'
Accumulated other comprehensive loss	-3,332	6,651	4,235	'	'
Stockholders' Equity Attributable to Noncontrolling Interest	'	'	0	'	'
Total stockholders' equity	803,561	'	706,418	'	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	803,561	'	706,418	'	'
Total liabilities and stockholders' equity	1,640,004	'	1,153,789	'	'
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 $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Allowance for doubtful accounts	$3,582	$4,105
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	95,000,000	95,000,000
Common stock, shares issued	46,892,811	46,105,076
Common stock, shares outstanding	46,892,811	46,105,076
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	5,064	5,064
Preferred Stock, Shares Outstanding	5,064	5,064
Series B Preferred Stock [Member]	'	'
Preferred stock, shares authorized	20,000	20,000
Preferred stock, shares issued	4,155	4,155
Preferred Stock, Shares Outstanding	4,155	4,155

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:	'	'	'	'
Total revenues	$153,018	$127,788	$431,886	$382,766
Cost of revenues (including share-based compensation of $82 and $263 for the three and nine months of 2014, respectively, and $162 and $581 for the three and nine months of 2013, respectively)	28,044	21,801	76,991	64,715
Gross profit	124,974	105,987	354,895	318,051
Operating expenses:	'	'	'	'
Sales and marketing (including share-based compensation of $443 and $1,360 for the three and nine months of 2014, respectively, and $465 and $1,315 for the three and nine months of 2013, respectively)	37,047	34,787	105,335	99,638
Research, development and engineering (including share-based compensation of $175 and $537 for the three and nine months of 2014, respectively, and $103 and $311 for the three and nine months of 2013, respectively)	7,637	6,000	22,451	19,134
General and administrative (including share-based compensation of $1,491 and $4,378 for the three and nine months of 2014, respectively, and $1,695 and $4,901 for the three and nine months of 2013, respectively)	33,812	25,892	94,209	74,377
Total operating expenses	78,496	66,679	221,995	193,149
Income (loss) from operations	46,478	39,308	132,900	124,902
Interest expense (income), net	10,123	4,972	20,753	14,709
Other expense (income), net	251	-396	-254	-600
Income (loss) before income taxes	36,104	34,732	112,401	110,793
Income Tax Expense (Benefit)	7,345	7,105	19,828	24,428
Net income attributable to j2 Global, Inc. common shareholders	28,759	27,806	92,573	86,768
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	28,759	27,627	92,573	86,365
Net Income (Loss) Attributable to Noncontrolling Interest	$0	($179)	$0	($403)
Net income per common share:	'	'	'	'
Basic	$0.60	$0.60	$1.94	$1.88
Diluted	$0.60	$0.59	$1.93	$1.85
Weighted average shares outstanding:	'	'	'	'
Basic	46,845,477	45,729,171	46,653,836	45,441,265
Diluted	47,163,912	46,291,631	46,988,427	46,066,604
Cash dividends paid per common share	$0.28	$0.25	$0.81	$0.72

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Income Condensed Consolidated Statements of Income (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Allocated Share-based Compensation Expense	$2,191	$2,425	$6,538	$7,108
Cost of Sales [Member]	'	'	'	'
Allocated Share-based Compensation Expense	82	162	263	581
Selling and Marketing Expense [Member]	'	'	'	'
Allocated Share-based Compensation Expense	443	465	1,360	1,315
Research and Development Expense [Member]	'	'	'	'
Allocated Share-based Compensation Expense	175	103	537	311
General and Administrative Expense [Member]	'	'	'	'
Allocated Share-based Compensation Expense	$1,491	$1,695	$4,378	$4,901

Condensed_Consolidated_Stateme2

Condensed Consolidated Statement of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$28,759	$27,627	$92,573	$86,365
Foreign currency translation adjustment, net of tax expense (benefit) of ($2,456) and ($1,757) for three and nine months of 2014, respectively, and $759 and ($219) for the three and nine months of 2013, respectively	-6,977	1,590	-4,806	-526
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit) of ($1,440) and ($1,295) for the three and nine months of 2014, respectively, and $2,465 and $5,380 for the three and nine months of and 2013, respectively	-3,006	4,259	-2,761	9,260
Other Comprehensive Income (Loss), Net of Tax	-9,983	5,849	-7,567	8,734
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	18,776	33,476	85,006	95,099
Net Income (Loss) Attributable to Noncontrolling Interest	0	-179	0	-403
Foreign currency translation adjustment attributable to noncontrolling interest, net of tax expense (benefit) of $0 for the three and nine months of 2014, respectively, and ($3) and ($20) for the three and nine months of 2013, respectively	0	-13	0	-35
Comprehensive Income	$18,776	$33,668	$85,006	$95,537

Condensed_Consolidated_Stateme3

Condensed Consolidated Statement of Comprehensive Income Condensed Consolidated Statement of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Foreign currency translation adjustment	($2,456)	$759	($1,757)	($219)
Unrealized gain on available-for-sale investments	-1,440	2,465	-1,295	5,380
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Noncontrolling Interest	$0	$0	$0	($20)

Condensed_Consolidated_Stateme4

Condensed Consolidated Statement Of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:	'	'
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$92,573	$86,365
Adjustments to reconcile net earnings to net cash provided by operating activities:	'	'
Depreciation and amortization	43,307	28,424
Amortization of discount or premium of investments	983	1,323
Amortization of financing costs and discounts	2,828	456
Share-based compensation	6,538	7,108
Excess tax benefits from share-based compensation	-6,728	-3,171
Provision for doubtful accounts	3,278	2,565
Deferred income taxes	-2,954	472
(Gain) loss on sale of available-for-sale investments	-69	103
Decrease (increase) in:	'	'
Accounts receivable	1,267	-7,495
Prepaid expenses and other current assets	-4,124	945
Other assets	-128	182
(Decrease) increase in:	'	'
Accounts payable and accrued expenses	-2,949	4,035
Income taxes payable	7,565	-3,286
Deferred revenue	-815	13,049
Liability for uncertain tax positions	-8,071	3,867
Other	-380	-62
Net cash provided by operating activities	132,121	134,880
Cash flows from investing activities:	'	'
Maturity of certificates of deposit	14,520	42,615
Purchase of certificates of deposit	0	-22,071
Sales of available-for-sale investments	60,456	82,889
Purchase of available-for-sale investments	-112,983	-139,955
Purchases of property and equipment	-7,755	-11,116
Proceeds from sale of assets	608	1
Acquisition of businesses, net of cash received	-118,238	-81,566
Purchases of intangible assets	-4,806	-2,784
Net cash used in investing activities	-168,198	-131,987
Cash flows from financing activities:	'	'
Proceeds from Issuance of Long-term Debt	402,500	0
Debt issuance costs	-11,527	-47
Repurchases of common stock and restricted stock	-5,473	-4,513
Issuance of common stock under employee stock purchase plan	199	161
Exercise of stock options	6,441	13,515
Dividends paid	-38,547	-33,267
Excess tax benefits from share-based compensation	6,728	3,171
Deferred payments for acquisitions	-14,316	0
Proceeds from (Payments for) Other Financing Activities	-765	-171
Net cash used in financing activities	345,240	-21,151
Effect of exchange rate changes on cash and cash equivalents	-1,967	-1,241
Net change in cash and cash equivalents	307,196	-19,499
Cash and cash equivalents	514,997	'
Cash and cash equivalents at end of period	$514,997	'

Basis_Of_Presentation

Basis Of Presentation	9 Months Ended
	Sep. 30, 2014
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. The Digital Media Division operates a portfolio of web properties providing technology, gaming and lifestyle content and an innovative data-driven platform connecting advertisers with visitors to those properties and to visitors of third party websites that are part of the Digital Media Division's advertising network.
	The accompanying interim condensed consolidated financial statements include the accounts of j2 Global and its direct and indirect 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, 2013 included in our Annual Report on Form 10-K filed with the SEC on March 3, 2014. 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 Securities and Exchange Commission on June 10, 2014.
	Use of Estimates
	The preparation of consolidated financial statements in accordance with 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. 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 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 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. 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 September 30, 2014 and December 31, 2013, 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. 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 debt within long-term other assets and recorded the amounts paid to the lender as 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 September 30, 2014 and December 31, 2013, 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 amount is immaterial in comparison to the total amount of the Company’s cash and cash equivalents held by these institutions which is not insured.
	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 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.
	Reclassifications
	Certain prior year reported amounts have been reclassified to conform with the 2014 presentation.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists, which provides guidance on financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. This ASU is effective for fiscal years beginning after December 15, 2013. This new guidance did not have a material impact on our financial statements.
	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.

Business_Acquisition

Business Acquisition	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Business Acquisition	'
	Business Acquisitions
	The Company completed the following acquisitions during the first nine months of fiscal 2014, paying the purchase price in cash in each transaction: (a) share purchase of City Numbers®, a UK-based provider of inbound DIDs in over 80 countries; (b) share and asset purchase of Securstore®, an Iceland-based provider of cloud backup and recovery services; (c) share purchase of Livedrive®, a UK-based provider of online backup with added file synchronization features; (d) asset purchase of Faxmate, an Australia-based provider of Internet fax services; (e) share purchase of Critical Software Ltd., a UK-based email security and management company operating under the brand name iCriticalTM; (f) share and asset purchase of Online Backup Company Norway AS and a subsidiary, a Nordic-based provider of online backup services; (g) share and asset purchase of emedia Communications LLC, a US and UK-based provider of research to information technology (IT) buyers and leads to IT vendors; (h) asset purchase of Contactology, Inc., a North Carolina-based provider of email marketing services; (i) asset purchase of Back Up My Info!, a NY-based provider of online backup services; (j) asset purchase of Web24, an Australia-based provider of domain name, web hosting, dedicated or shared servers and related services; (k) equity purchase of Excel Micro, LLC, a Philadelphia-based provider of cloud email security and archiving solutions; and (l) other smaller share and asset acquisitions in the Business Cloud Services segment.
	The condensed consolidated statement of income, since the date of each acquisition, and balance sheet, as of September 30, 2014, reflect the results of operations of all 2014 acquisitions. For the nine months ended September 30, 2014, these acquisitions contributed $32 million to the Company's revenues. Net income contributed by these acquisitions was not separately identifiable due to the Company's integration activities. Total consideration for these transactions was $176.3 million, net of cash acquired and including $34.9 million of assumed liabilities consisting primarily of deferred revenues, trade accounts payable, and other accrued liabilities.
	The following table summarizes the allocation of the purchase consideration for these acquisitions (in thousands):
	Asset	Valuation
	Accounts Receivable	$	11,291
	Property and Equipment	8,686
	Other Assets	3,339
	Deferred Tax Asset	1,877
	Software	2,474
	Trade Names	2,387
	Customer Relationships	65,153
	Other Intangibles	1,477
	Goodwill	79,600
	Total	$	176,284
	The initial accounting for these 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 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.
	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 nine months ended September 30, 2014 is $79.6 million, of which $20.9 million is expected to be deductible for income tax purposes.
	Pro Forma Financial Information for 2014 Acquisitions
	The following unaudited pro forma supplemental information is based on estimates and assumptions, which j2 Global believes are reasonable. However, this information is not necessarily indicative of the Company's consolidated financial position or results of income in future periods or the results that actually would have been realized had j2 Global and the acquired businesses been combined companies during the periods presented. These pro forma results exclude any savings or synergies that would have resulted from these business acquisitions had they occurred on January 1, 2013 and do not take into consideration the exiting of any acquired lines of business. This unaudited pro forma supplemental information includes incremental intangible asset amortization and other charges as a result of the acquisitions, net of the related tax effects.
	The supplemental information on an unaudited pro forma financial basis presents the combined results of j2 Global and its 2014 acquisitions as if each acquisition had occurred on January 1, 2013 (in thousands, except per share amounts):
		Nine Months Ended September 30, 2014		Nine Months Ended September 30, 2013
		(unaudited)		(unaudited)
	Revenues	$	474,749	$	440,030
	Net Income	$	96,031	$	89,043
	EPS - Basic	$	2.01	$	1.93
	EPS - Diluted	$	2	$	1.9

Investments

Investments	9 Months Ended
	Sep. 30, 2014
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):
		September 30,		December 31, 2013
		2014
	Due within 1 year	$	81,410	$	46,339
	Due within more than 1 year but less than 5 years	58,955		44,865
	Due within more than 5 years but less than 10 years	—		—
	Due 10 years or after	2,459		2,486
	Total	$	142,824	$	93,690
	The following table summarizes the Company’s investments designated as available-for-sale (in thousands):
		September 30,		December 31, 2013
		2014
	Available-for-sale	$	168,833	$	123,737
	Total	$	168,833	$	123,737
	The following table summarizes the gross unrealized gains and losses and fair values for the Company's available-for-sale investments as of September 30, 2014 and December 31, 2013 aggregated by major security type (in thousands):
		Amortized		Gross		Gross			Fair
		Cost		Unrealized		Unrealized			Value
				Gains		Losses
	September 30, 2014
	Debt Securities	$	142,730	$	188	$	(94	)	$	142,824
	Equity Securities	20,610		5,631		(232		)	26,009
	Total	$	163,340	$	5,819	$	(326	)	$	168,833
	December 31, 2013
	Debt Securities	$	93,569	$	158	$	(37	)	$	93,690
	Equity Securities	20,610		9,558		(121		)	30,047
	Total	$	114,179	$	9,716	$	(158	)	$	123,737
	At September 30, 2014, 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 September 30, 2014. At September 30, 2014, equity securities were recorded as available-for-sale and represent a strategic equity investment. At September 30, 2014, 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.
	Investments in an unrealized loss position as of September 30, 2014 and December 31, 2013, but in a continuous unrealized loss position for less than 12 months had a fair value of $78.8 million and $37.3 million, respectively. Investments in a continuous unrealized loss position for 12 months and longer as of September 30, 2014 and December 31, 2013 had a fair value of $0.2 million and $2.0 million, respectively, of which loss positions are determined to be temporary in nature.
	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.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures [Text Block]	'
	Fair Value Measurements
	j2 Global complies with the accounting guidance 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. 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, the Company uses 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 are 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 above 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. The total carrying value of long-term debt was $591.5 million and $245.7 million, and the corresponding fair value was approximately $678.3 million and $283.3 million, at September 30, 2014 and December 31, 2013, respectively.
	The following tables present the fair values of the Company’s financial instruments that are measured at fair value on a recurring basis (in thousands):
	September 30, 2014	Level 1		Level 2		Level 3		Fair Value
	Cash equivalents:
	Money market and other funds	$	328,786	$	—	$	—	$	328,786
	Time deposits	—		52,057		—		52,057
	Corporate commercial papers	—		12,004		—		12,004
	Equity securities	26,009		—		—		26,009
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	—		42,387		—		42,387
	Debt securities issued by states of the U.S. and political subdivisions of the states	—		2,119		—		2,119
	Debt securities issued by foreign governments	—		2,033		—		2,033
	Corporate debt securities	—		96,285		—		96,285
	Total	$	354,795	$	206,885	$	—	$	561,680
	December 31, 2013	Level 1		Level 2		Level 3		Fair Value
	Cash equivalents:
	Money market and other funds	$	101,232	$	—	$	—	$	101,232
	Time deposits	22,773		—		—		22,773
	Certificates of deposit	14,402		—		—		14,402
	Equity securities	30,047		—		—		30,047
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	23,702		—		—		23,702
	Debt securities issued by states of the U.S. and political subdivisions of the states	3,296		—		—		3,296
	Corporate debt securities	66,692		—		—		66,692
	Total	$	262,144	$	—	$	—	$	262,144
	Management reevaluated the inputs used in determining the level of fair value as of September 30, 2014 and transferred $206.9 million of financial instruments from Level 1 to Level 2. The Company determined the fair value of such transfer as of the end of the reporting period.
	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	9 Months Ended
	Sep. 30, 2014
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 nine months ended September 30, 2014 are as follows (in thousands):
	Balance as of January 1, 2014	$	457,422
	Goodwill acquired (Note 3)	79,600
	Purchase accounting adjustments	(975		)
	Foreign exchange translation	(2,644		)
	Balance as of September 30, 2014	$	533,403
	The Company's goodwill balance was $533.4 million as of September 30, 2014, of which $385.3 million and $148.1 million were recorded in the Business Cloud Services and Digital Media segments, respectively. Purchase accounting adjustments relate to adjustments to goodwill in connection with prior year business acquisitions.
	Intangible assets are summarized as of September 30, 2014 and December 31, 2013 as follows (in thousands):
	Intangible Assets with Indefinite Lives:
		September 30,				December 31,
		2014				2013
	Trade name	$	27,379			$	27,379
	Other	5,432				5,432
	Total	$	32,811			$	32,811
	Intangible Assets Subject to Amortization:
	As of September 30, 2014, intangible assets subject to amortization relate primarily to the following (in thousands):
		Weighted-Average		Historical				Accumulated			Net
		Amortization		Cost				Amortization
		Period
	Tradenames	16.6 years		$	69,067			$	(12,253	)	$	56,814
	Patent and patent licenses	7.8 years		62,836				(35,944		)	26,892
	Customer relationships	8.5 years		201,827				(57,429		)	144,398
	Other purchased intangibles	5.1 years		20,183				(17,594		)	2,589
	Total			$	353,913			$	(123,220	)	$	230,693
	As of December 31, 2013, intangible assets subject to amortization relate primarily to the following (in thousands):
		Weighted-Average		Historical				Accumulated			Net
		Amortization		Cost				Amortization
		Period
	Tradenames	17.0 years		$	66,911			$	(11,182	)	$	55,729
	Patent and patent licenses	8.1 years		58,446				(29,916		)	28,530
	Customer relationships	8.1 years		139,362				(38,382		)	100,980
	Other purchased intangibles	5.0 years		18,149				(12,666		)	5,483
	Total			$	282,868			$	(92,146	)	$	190,722
	Amortization expense, included in general and administrative expense, approximated $10.7 million and $7.5 million for the three month periods ended September 30, 2014 and 2013, respectively, and $32.2 million and $21.6 million for the nine month periods ended September 30, 2014 and 2013, respectively.  Amortization expense is estimated to approximate $44.3 million, $45.6 million, $40.0 million, $33.1 million and $23.8 million for fiscal years 2014 through 2018 respectively, and $76.1 million thereafter through the duration of the amortization period.

Long_Term_Debt

Long Term Debt	9 Months Ended
	Sep. 30, 2014
Long-term Debt, Unclassified [Abstract]	'
Debt Disclosure [Text Block]	'
	Long-Term Debt
	8.0% Senior Notes
	On July 26, 2012, j2 Cloud Services, Inc. (formerly j2 Global, Inc.), a subsidiary of j2 Global, Inc., issued $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 September 30, 2014, the unamortized discount on the Senior Notes was approximately $3.9 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 September 30, 2014, 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 September 30, 2014, 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 to the Senior Notes contains 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. As of September 30, 2014, 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 September 30, 2014, the estimated fair value of the Senior Notes was approximately $273.3 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 September 30, 2014.
	3.25% Convertible Notes
	On June 10, 2014, j2 Global issued $402.5 million (including the subsequent exercise of the underwriters option) 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 initial purchaser's discounts and commissions. The net proceeds were available for general corporate purposes, which may include working capital, acquisitions, retirement of debt and other business opportunities. 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 on December 15, 2014. 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 our 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 our 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 our common stock or a combination thereof at our election. The Company currently intends to satisfy our 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 our common stock based on the Company's closing stock price at issuance. The conversion rate is subject to adjustment for certain events as set forth in the indenture governing the Convertible Notes and described in the Prospectus Supplement filed with the Securities and Exchange Commission on June 13, 2014 ("Prospectus Supplement") in connection with the offer and sale of 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 will be the Company's general senior unsecured obligations and will 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 our 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 September 30, 2014, the carrying value of the Convertible Notes was $345.4 million, which consisted of $402.5 million outstanding principal amount net of $57.1 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 September 30, 2014, the remaining period over which the unamortized debt discount will be amortized is 6.8 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 initial purchasers' discount and legal and other professional service fees. Of the total deferred issuance costs incurred, $10.0 million of such deferred issuance costs were attributable to the liability component and are recorded within other assets and are being amortized to interest expense through June 15, 2021. The unamortized balance as of September 30, 2014 was $9.7 million. The remaining $1.7 million ($1.1 million net of tax) of such deferred issuance costs were netted with the equity component in additional paid-in capital at the issuance date.
	For the third quarter ended September 30, 2014, 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 September 30, 2014, the estimated fair value of the Convertible Notes was approximately $405.0 million.
	Cash paid for interest on debt for the nine months ended September 30, 2014 was $20.0 million.
	Long-term debt as of September 30, 2014 consists of the following (in thousands):
	Notes	$	246,055
	Convertible Notes	345,409
	Total long-term debt	591,464
	Less: current portion	—
	Total long-term debt, less current portion	$	591,464

Commitments_And_Contingencies

Commitments And Contingencies	9 Months Ended
	Sep. 30, 2014
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. Many of these matters directly or indirectly concern patent actions filed by j2 Global and its affiliates against others. As part of the Company’s continuing effort to prevent the unauthorized use of its intellectual property, j2 Global and its affiliates have brought claims against several companies for infringing patents relating to online fax, voice, and other messaging technologies, including, among others, Integrated Global Concepts, Inc. (“IGC”) and RPost Holdings, Inc. and its affiliates (collectively, “RPost”).
	On September 15, 2006, a j2 Global affiliate filed a patent infringement suit against IGC in the U.S. District Court for the Northern District of Georgia (“Northern District of Georgia”) (No. 1:06-cv-02119). In response, IGC filed counterclaims alleging antitrust violations and breach of contract, in addition to patent-related counterclaims.  On September 2, 2011, the Northern District of Georgia dismissed IGC’s breach of contract counterclaim and one of its antitrust counterclaims. On July 27, 2012, the Northern District of Georgia granted the j2 Global affiliate’s motion to dismiss the patent-related claims and counterclaims. On March 12, 2014, the j2 Global affiliate moved for summary judgment on IGC’s remaining antitrust claims, which remains pending.
	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 j2 Global Canada, Inc. (“j2 Canada,” carrying on business as Protus IP Solutions) in the Ontario Superior Court of Justice (No. 11-50673), alleging that j2 Canada breached a contract relating to his use of j2 Canada’s Campaigner® product. j2 Canada filed a responsive pleading on March 23, 2011 and its 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. j2 Canada filed an amended statement of defense on April 8, 2013. Discovery is ongoing.
	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 contract not to sue IGC. The j2 Global affiliates asserted counterclaims for infringement of U.S. Patent Nos. 6,350,066 (“the ’066 Patent”), 6,208,638 (“the ’638 Patent”), 6,597,688 (“the ’688 Patent”), and 7,020,132 (“the ’132 Patent”), and IGC asserted counterclaims for, among other things, invalidity, unenforceability, non-infringement, and implied license. 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 U.S. Patent No. 6,020,980 (“the ’980 Patent”). In response, IGC filed counterclaims for, among other things, invalidity, non-infringement, implied license, and breach of the same alleged covenant not to sue. The Northern District of California ordered that the two pending suits were related for the contract issues and on March 21, 2014 granted summary judgment dismissing IGC’s breach of contract claims in both actions. On June 27, 2014, the Northern District of California transferred the cases to the Central District of California (Nos. 14-cv-5128 and 14-cv-5139). The Central District of California has not yet issued a scheduling order.
	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 or around 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). The Massachusetts Appellate Tax Board has not yet issued a scheduling order.
	On January 18, 2013, Paldo Sign and Display Co. (“Paldo”) filed an amended complaint adding two j2 Global affiliates and a former j2 Canada 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. (“Sabon”), 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 j2 Canada 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 the ’066 Patent, as well as U.S. Patent Nos. 6,857,074 (“the ’074 Patent”), 7,836,141 (“the ’141 Patent”), 7,895,306 (“the ’306 Patent”), 7,895,313 (“the ’313 Patent”), 7,934,148 (“the ’148 Patent”), 5,675,507, 5,870,549, and 6,564,321. 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 patent licensing and sales of rights. 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). The Northern District of Georgia has not yet issued a scheduling order.
	On October 16, 2013, one of j2 Global’s affiliates entered its 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 the ’074, ’141, ’306, ’313, and ’148 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 Federal Circuit on June 27, 2014. Briefing on the appeal was stayed on September 26, 2014, pending the Northern District of Illinois’s resolution of the defendants’ motion to declare the case exceptional.
	On December 16, 2013, Anthony Jenkins filed a purported class action against a j2 Global affiliate in the Central District of California (No. 2:13-cv-09226).  An amended complaint was filed on March 18, 2014 adding two additional named plaintiffs. The amended complaint includes causes of action for breach of contract, several California statutory violations, and conversion.  The claims arose from the alleged difficulties some users encountered in canceling their eFax® accounts.  The potential class representatives sought, among other things, damages and injunctive relief on behalf of themselves and a purported nationwide class of allegedly similarly situated persons.  On May 23, 2014, the Central District of California dismissed the plaintiffs’ breach of contract and conversion claims, as well as certain statutory claims. On September 15, 2014, this case was dismissed pursuant to a settlement agreement.
	On February 19, 2014, two j2 Global affiliates filed suit in the Central District of California (No. 2:14-cv-01283) against RPost, alleging infringement of the ’980 and ’148 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 j2 Canada as a plaintiff. RPost filed an answer to the complaint on July 14, 2014, asserting counterclaims of infringement for the nine RPost patents against j2 Canada’s Campaigner® product. Discovery is ongoing.
	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 allegedly similarly situated persons. On August 26, 2014, Law Enforcement Officers, Inc. and IV Pit Stop, Inc. (collectively, “LEO”) filed a 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 in certain Onebox® accounts. LEO is seeking, among other things, damages and injunctive relief on behalf of itself and a purported nationwide class of allegedly similarly situated persons. On September 29, 2014, the Los Angeles Superior Court ordered both cases related. 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 (“VAT”), 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 November 2014 (extended to December 2014), 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 material 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	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014, the effective tax rate was 20.3%.  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 reinvest such earnings in foreign jurisdictions.  Income before income taxes included income from domestic operations of $70.5 million and $56.0 million for the nine months ended September 30, 2014 and 2013, respectively, and income from foreign operations of $41.9 million and $54.8 million for the nine months ended September 30, 2014 and 2013, respectively.
	As of September 30, 2014 and December 31, 2013, the Company had $35.8 million and $43.9 million, respectively, in liabilities for uncertain income tax positions. The decrease in liabilities for uncertain income tax positions resulted from j2 Global effectively settling its California Franchise Tax Board ("FTB") 2004 through 2008 income tax audits, as well as transfer pricing changes made for 2013 and 2014. 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 $23.6 million for the nine months ended September 30, 2014.
	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 $9.8 million and $11.3 million at September 30, 2014 and December 31, 2013, respectively.
	Income Tax Audits:
	The Company is under income tax audit by the U.S. Internal Revenue Service ("IRS") for tax years 2009 and 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, and that process remains on-going.
	j2 Global is currently under income tax audit by the FTB for tax years 2009 through 2011, by the Illinois Department of Revenue for tax years 2008 and 2009, 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.
	It is reasonably possible that these audits may conclude in the next 12 months 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	9 Months Ended
	Sep. 30, 2014
Stockholders' Equity Note [Abstract]	'
Stockholders' Equity	'
	Stockholders’ Equity
	Non-Controlling Interest
	Non-controlling interests represent equity interests in consolidated subsidiaries that are not attributable, either directly or indirectly, to j2 Global (i.e., minority interests). Non-controlling interests include the minority equity holders' proportionate share of the equity of Ziff Davis, LLC (formerly Ziff Davis, Inc.) and its subsidiaries ("Ziff Davis").
	Ownership interests in subsidiaries held by parties other than the Company are presented as non-controlling interests within stockholders' equity, separately from the equity held by the Company. Revenues, expenses, net income and other comprehensive income are reported in the consolidated financial statements at the consolidated amounts, which includes amounts attributable to both the Company's interest and the non-controlling interests in Ziff Davis. Net income and other comprehensive income is then attributed to the Company's interest and the non-controlling interests. Net income (loss) to non-controlling interests is deducted from net income in the condensed consolidated statements of income to determine net income (loss) attributable to the Company's common stockholders.
	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") and on February 11, 2014 extended the 2012 Program through February 20, 2015.  During the nine month period ended September 30, 2014, no shares were repurchased under this program.
	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 September 30, 2014, the Company purchased 13,349 shares from plan participants for this purpose.
	Dividends
	The following is a summary of each dividend declared during fiscal year 2014:
	Declaration Date	Dividend per Common Share		Record Date	Payment Date
	February 11, 2014	$	0.2625	February 24, 2014	March 10, 2014
	May 7, 2014	$	0.27	May 19, 2014	June 3, 2014
	August 5, 2014	$	0.2775	August 18, 2014	September 2, 2014
	October 30, 2014	$	0.285	November 17, 2014	December 4, 2014
	Future dividends are subject to Board approval.

Stock_Options_And_Employee_Sto

Stock Options And Employee Stock Purchase Plan	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014, 224,708 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 September 30, 2014, 606,447 shares underlying options and 95,204 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 nine months ended September 30, 2014:
		Number of		Weighted-				Weighted-Average		Aggregate
		Shares		Average				Remaining		Intrinsic
				Exercise				Contractual		Value
				Price				Term (in years)
	Outstanding at January 1, 2014	1,175,657		$	21.21
	Granted	—		—
	Exercised	(424,706	)	15.59
	Canceled	(15,000	)	31.07
	Outstanding at September 30, 2014	735,951		24.25				4.1		$	18,476,543
	Exercisable at September 30, 2014	623,739		23.72				3.7		$	15,991,979
	Vested and expected to vest at September 30, 2014	721,497		$	24.19			4.1		$	18,163,534
	The aggregate intrinsic values of options exercised during the nine months ended September 30, 2014 and 2013 were $14.5 million and $11.6 million, respectively.
	As of September 30, 2014 and December 31, 2013, unrecognized stock compensation related to non-vested stock options granted under the 1997 Plan and the 2007 Plan approximated $1.0 million and $2.0 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 1.6 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 nine months ended September 30, 2014 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 12.22% and 15.72% as of September 30, 2014 and 2013, 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 $1.9 million and $1.8 million of compensation expense for the three months ended September 30, 2014 and 2013, respectively, related to restricted stock and restricted stock units, and $5.5 million and $5.0 million of compensation expense for the nine months ended September 30, 2014 and 2013, respectively. As of September 30, 2014 and December 31, 2013, the Company had unrecognized share-based compensation cost of approximately $22.6 million and $20.2 million, respectively, associated with these awards. This cost is expected to be recognized over a weighted-average period of 3.1 years for awards and 3.3 years for units.
	Restricted stock award activity for the nine months ended September 30, 2014 is set forth below:
		Shares		Weighted-Average
				Grant-Date
				Fair Value
	Nonvested at January 1, 2014	1,178,371		$	18.17
	Granted	176,864		44.65
	Vested	(452,010	)	17.66
	Canceled	(45,070	)	35.55
	Nonvested at September 30, 2014	858,155		$	22.98
	Restricted stock unit award activity for the nine months ended September 30, 2014 is set forth below:
		Number of		Weighted-Average		Aggregate
		Shares		Remaining		Intrinsic
				Contractual		Value
				Term (in years)
	Outstanding at January 1, 2014	109,725
	Granted	16,737
	Vested	(16,258	)
	Canceled	(15,000	)
	Outstanding at September 30, 2014	95,204		2		$	4,699,269
	Vested and expected to vest at September 30, 2014	74,330		1.8		$	3,668,909
	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 and nine months ended September 30, 2014 and 2013 (in thousands):
		Three Months Ended September 30,							Nine Months Ended September 30,
		2014			2013				2014			2013
	Cost of revenues	$	82		$	162			$	263		$	581
	Operating expenses:
	Sales and marketing	443			465				1,360			1,315
	Research, development and engineering	175			103				537			311
	General and administrative	1,491			1,695				4,378			4,901
	Total	$	2,191		$	2,425			$	6,538		$	7,108
	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 nine months ended September 30, 2014 and 2013, 4,463 and 4,416 shares were purchased under the plan, respectively. Cash received upon the issuance of common stock under the Purchase Plan was $199,000 and $161,000 for the nine months ended September 30, 2014 and 2013, respectively.  As of September 30, 2014, 1,635,736 shares were available under the Purchase Plan for future issuance.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2014
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 September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Numerator for basic and diluted net income per common share:
	Net income attributable to j2 Global, Inc. common shareholders	$	28,759		$	27,806		$	92,573		$	86,768
	Net income available to participating securities (a)	(538		)	(416		)	(1,964		)	(1,455		)
	Net income available to j2 Global, Inc. common shareholders	$	28,221		$	27,390		$	90,609		$	85,313
	Denominator:
	Weighted-average outstanding shares of common stock	46,845,477			45,729,171			46,653,836			45,441,265
	Dilutive effect of:
	Dilutive effect of equity incentive plans	318,435			562,460			334,591			625,339
	Common stock and common stock equivalents	47,163,912			46,291,631			46,988,427			46,066,604
	Net income per share:
	Basic	$	0.6		$	0.6		$	1.94		$	1.88
	Diluted	$	0.6		$	0.59		$	1.93		$	1.85
	(a)	Represents unvested restricted stock awards that contain certain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid).
	For the three and nine months ended September 30, 2014 and 2013, 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.

Geographic_Information

Geographic Information	9 Months Ended
	Sep. 30, 2014
Segments, Geographical Areas [Abstract]	'
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 September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Revenues by segment:
	Business Cloud Services	$	109,855		$	94,391		$	317,208		$	293,898
	Digital Media	43,218			33,522			114,860			89,207
	Elimination of inter-segment revenues	(55		)	(125		)	(182		)	(339		)
	Total revenues	153,018			127,788			431,886			382,766
	Direct costs by segment(1):
	Business Cloud Services	60,841			48,504			176,609			143,075
	Digital Media	35,872			32,652			97,305			92,845
	Direct costs by segment(1):	96,713			81,156			273,914			235,920
	Business Cloud Services operating income	49,014			45,886			140,599			150,823
	Digital Media operating income (loss)	7,346			871			17,555			(3,638		)
	Segment operating income	56,360			46,757			158,154			147,185
	Global operating costs(2)	9,882			7,449			25,254			22,283
	Income from operations	$	46,478		$	39,308		$	132,900		$	124,902
	(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.
		September 30, 2014			December 31, 2013
	Assets:
	Business Cloud Services	$	853,843		$	818,722
	Digital Media	352,547			333,286
	Total assets from reportable segments	1,206,390			1,152,008
	Corporate	433,614			1,781
	Total assets	$	1,640,004		$	1,153,789
		Nine Months Ended September 30,
		2014			2013
	Capital expenditures:
	Business Cloud Services	$	4,366		$	5,573
	Digital Media	3,066			5,067
	Total from reportable segments	7,432			10,640
	Corporate	323			476
	Total capital expenditures	$	7,755		$	11,116
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Depreciation and amortization:
	Business Cloud Services	$	9,413		$	6,248		$	27,471		$	17,609
	Digital Media	5,250			3,767			15,273			10,335
	Total from reportable segments	14,663			10,015			42,744			27,944
	Corporate	188			168			563			480
	Total depreciation and amortization	$	14,851		$	10,183		$	43,307		$	28,424
	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 September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Revenues:
	United States	$	101,381		$	90,447		$	289,656		$	270,444
	Canada	17,698			17,992			52,642			55,137
	Ireland	10,846			10,417			32,118			30,822
	All other countries	23,093			8,932			57,470			26,363
		$	153,018		$	127,788		$	431,886		$	382,766
		September 30,			December 31,
		2014			2013
	Long-lived assets:
	United States	$	176,216		$	170,247
	All other countries	93,264			51,675
	Total	$	269,480		$	221,922

Unrestricted_Subsidiaries_Note

Unrestricted Subsidiaries (Notes)	9 Months Ended
	Sep. 30, 2014
Unrestricted Subsidiaires [Abstract]	'
Unrestricted Subsidiaries [Text Block]	'
	Unrestricted Subsidiaries
	As of September 30, 2014, 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 September 30, 2014 is as follows (in thousands):
		September 30, 2014
	ASSETS
	Cash and cash equivalents	$	28,093
	Accounts receivable	47,081
	Prepaid expenses and other current assets	3,570
	Deferred income taxes	9,289
	Total current assets	88,033
	Property and equipment, net	12,737
	Trade names, net	50,156
	Patent and patent licenses, net	25,904
	Customer relationships, net	49,885
	Goodwill	148,080
	Other purchased intangibles, net	802
	Deferred income taxes	1,280
	Other assets	1,707
	Total assets	$	378,584
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	$	36,700
	Income taxes payable	249
	Deferred revenue, current	4,044
	Deferred income taxes	—
	Total current liabilities	40,993
	Deferred income taxes	25,238
	Other long-term liabilities	1,541
	Total liabilities	67,772
	Additional paid-in capital	316,124
	Accumulated deficit	(5,306		)
	Accumulated other comprehensive income (loss)	(6		)
	Total stockholders’ equity	310,812
	Total liabilities and stockholders’ equity	$	378,584
	The results of operations of the Unrestricted Subsidiaries for the three and nine months ended September 30, 2014 and 2013 is as follows (in thousands):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014 (1)			2013			2014 (1)			2013
	Revenues	$	43,618		$	33,522		$	115,801		$	89,207
	Cost of revenues	5,299			4,398			13,596			12,682
	Gross profit	38,319			29,124			102,205			76,525
	Operating expenses:
	Sales and marketing	18,163			18,085			49,552			49,049
	Research, development and engineering	1,565			943			3,792			4,401
	General and administrative	13,527			9,225			35,320			26,713
	Total operating expenses	33,255			28,253			88,664			80,163
	Income (loss) from operations	5,064			871			13,541			(3,638		)
	Interest expense (income), net	(3		)	2,633			(5		)	6,350
	Other expense (income), net	518			278			100			85
	Income (loss) before income taxes	4,549			(2,040		)	13,446			(10,073		)
	Income tax expense (benefit)	4,015			1,624			8,250			(1,836		)
	Net income (loss)	$	534		$	(3,664	)	$	5,196		$	(8,237	)
	(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)	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014 (in thousands):
		Unrealized Gains (Losses) on Investments			Foreign Currency Translation				Total
	Beginning balance	$	6,301		$	350			$	6,651
	Other comprehensive (loss) income before reclassifications	(3,008		)	(6,977		)		(9,985		)
	Amounts reclassified from accumulated other comprehensive income	2			—				2
	Net current period other comprehensive (loss) income	(3,006		)	(6,977		)		(9,983		)
	Ending balance	$	3,295		$	(6,627	)		$	(3,332	)
	The following table summarizes the changes in accumulated balances of other comprehensive income, net of tax, for the nine months ended September 30, 2014 (in thousands):
		Unrealized Gains (Losses) on Investments			Foreign Currency Translation				Total
	Beginning balance	$	6,056		$	(1,821	)		$	4,235
	Other comprehensive (loss) income before reclassifications	(2,746		)	(4,806		)		(7,552		)
	Amounts reclassified from accumulated other comprehensive income	(15		)	—				(15		)
	Net current period other comprehensive (loss) income	(2,761		)	(4,806		)		(7,567		)
	Ending balance	$	3,295		$	(6,627	)		$	(3,332	)
	The following table provides details about reclassifications out of accumulated other comprehensive income for the three and nine months ended September 30, 2014 (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 September 30, 2014			Nine Months Ended September 30, 2014
	Unrealized gain on available-for-sale investments		1			(25		)		Other expense (income), net
			1			(25		)		Total, before income taxes
			1			10				Income tax expense (benefit)
			2			(15		)		Total, net of tax
	Total reclassifications for the period		$	2		$	(15	)		Total, net of tax

Condensed_Consolidating_Financ

Condensed Consolidating Financials (Notes)	9 Months Ended
	Sep. 30, 2014
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 8.0% senior unsecured notes due 2020 that were 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 did not, as of June 30, 2014, 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.
	Condensed Consolidated Balance Sheets
	(Unaudited, in thousands except share and per share data)
	As of
	30-Sep-14
	BALANCE SHEET	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	ASSETS
	Cash and cash equivalents	$	313,667		$	14,799		$	186,531		$	—		$	514,997
	Short-term investments	62,647			39,767			5,004			—			107,418
	Accounts receivable, net	—			11,213			63,803			—			75,016
	Prepaid expenses and other current assets	1,075			16,237			7,505			—			24,817
	Deferred income taxes	—			—			9,081			(1,630		)	7,451
	Intercompany receivable	—			81,095			—			(81,095		)	—
	Total current assets	377,389			163,111			271,924			(82,725		)	729,699
	Long-term investments	54,353			7,061			1			—			61,415
	Property and equipment, net	—			8,349			30,438			—			38,787
	Trade names, net	—			10,273			73,920			—			84,193
	Patent and patent licenses, net	—			921			25,971			—			26,892
	Customer relationships, net	—			1,049			143,349			—			144,398
	Goodwill	—			50,803			482,600			—			533,403
	Other purchased intangibles, net	—			4,308			3,713			—			8,021
	Investment in subsidiaries	231,027			442,726			8,716			(682,469		)	—
	Deferred income taxes	—			6,309			3,178			(9,487		)	—
	Other assets	9,684			1,488			2,024			—			13,196
	Total assets	$	672,453		$	696,398		$	1,045,834		$	(774,681	)	$	1,640,004
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	$	7,486		$	23,100		$	40,195		$	—		$	70,781
	Income taxes payable	—			398			789			—			1,187
	Deferred revenue - short term	—			23,312			34,087			—			57,399
	Deferred income taxes	856			1,365			—			(1,630		)	591
	Other current liabilities	—			—			540			—			540
	Intercompany payable	42,256			—			38,839			(81,095		)	—
	Total current liabilities	50,598			48,175			114,450			(82,725		)	130,498
	Long term debt	345,409			246,055			—			—			591,464
	Liability for uncertain tax positions	—			35,793			—			—			35,793
	Deferred income taxes	24,332			—			46,865			(9,487		)	61,710
	Deferred revenue - long term	—			8,870			2,075			—			10,945
	Other long-term liabilities	—			881			5,152			—			6,033
	Total liabilities	420,339			339,774			168,542			(92,212		)	836,443
	Common stock, $0.01 par value.	469			—			—			—			469
	Additional paid-in capital - common	270,857			231,027			421,401			(652,428		)	270,857
	Retained earnings	(19,276		)	120,214			464,670			(30,041		)	535,567
	Accumulated other comprehensive loss	64			5,383			(8,779		)	—			(3,332		)
	Total j2 Global Inc., stockholders’ equity	252,114			356,624			877,292			(682,469		)	803,561
	Total stockholders’ equity	252,114			356,624			877,292			(682,469		)	803,561
	Total liabilities and stockholders’ equity	$	672,453		$	696,398		$	1,045,834		$	(774,681	)	$	1,640,004
	j2 Global, Inc.
	Condensed Consolidated Statements of Income
	(Unaudited, in thousands except share and per share data)
	Three Months Ended
	30-Sep-14
		j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Revenues:
	Total revenues	$	—		$	52,960		$	90,854		$	9,204		$	153,018
	Cost of revenues	—			(3,275		)	22,060			9,259			28,044
	Gross profit	—			56,235			68,794			(55		)	124,974
	Operating expenses:
	Sales and marketing	—			9,168			27,934			(55		)	37,047
	Research, development and engineering	—			3,320			4,317			—			7,637
	General and administrative	3,063			6,789			23,960			—			33,812
Total operating expenses	3,063			19,277			56,211			(55		)	78,496
Operating income	(3,063		)	36,958			12,583			—			46,478
Interest expense (income), net	5,136			5,116			(129		)	—			10,123
Other expense (income), net	(2		)	78			175			—			251
Income before income taxes	(8,197		)	31,764			12,537			—			36,104
Income tax expense	(3,158		)	3,458			7,045			—			7,345
Net income attributable to j2 Global, Inc. common shareholders	$	(5,039	)	$	28,306		$	5,492		$	—		$	28,759
j2 Global, Inc.
Condensed Consolidated Statements of Income
(Unaudited, in thousands except share and per share data)
Nine Months Ended
30-Sep-14
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	169,467		$	293,530		$	(31,111	)	$	431,886
Cost of revenues	—			35,729			72,191			(30,929		)	76,991
Gross profit	—			133,738			221,339			(182		)	354,895
Operating expenses:
Sales and marketing	—			27,148			78,369			(182		)	105,335
Research, development and engineering	—			10,411			12,040			—			22,451
General and administrative	3,463			24,004			66,742			—			94,209
Total operating expenses	3,463			61,563			157,151			(182		)	221,995
Operating income	(3,463		)	72,175			64,188			—			132,900
Interest expense (income), net	5,786			15,314			(347		)	—			20,753
Other expense (income), net	(2		)	6			(258		)	—			(254		)
Income before income taxes	(9,247		)	56,855			64,793			—			112,401
Income tax expense	(3,537		)	4,783			18,582			—			19,828
Net income attributable to j2 Global, Inc. common shareholders	$	(5,710	)	$	52,072		$	46,211		$	—		$	92,573
j2 Global, Inc.
Condensed Consolidated Statements of Comprehensive Income
(Unaudited, in thousands except share and per share data)
Three Months Ended
30-Sep-14
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	(5,039	)	$	28,306		$	5,492		$	—		$	28,759
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			2,300			(9,277		)	—			(6,977		)
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	64			(3,068		)	(2		)	—			(3,006		)
Other comprehensive income (loss), net of tax	64			(768		)	(9,279		)	—			(9,983		)
Comprehensive income attributable to j2 Global, Inc.	$	(4,975	)	$	27,538		$	(3,787	)	$	—		$	18,776
j2 Global, Inc.
Condensed Consolidated Statements of Comprehensive Income
(Unaudited, in thousands except share and per share data)
Nine Months Ended
30-Sep-14
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	(5,710	)	$	52,072		$	46,211		$	—		$	92,573
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			1,644			(6,450		)	—			(4,806		)
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	64			(2,834		)	9			—			(2,761		)
Other comprehensive income (loss), net of tax	64			(1,190		)	(6,441		)	—			(7,567		)
Comprehensive income attributable to j2 Global, Inc.	$	(5,646	)	$	50,882		$	39,770		$	—		$	85,006
j2 Global, Inc.
Condensed Consolidated Statement of Cash Flows
(Unaudited, in thousands)
Nine Months Ended
30-Sep-14
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Cash flows from operating activities:
Net income	$	(5,710	)	$	52,072		$	46,211		$	—		$	92,573
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	—			4,950			38,357			—			43,307
Amortization of discount or premium of investments	142			677			164			—			983
Amortization of financing costs and discounts	2,266			562			—			—			2,828
Share-based compensation	2,191			4,514			(167		)	—			6,538
Excess tax benefits from share-based compensation	(1,925		)	(4,802		)	(1		)	—			(6,728		)
Provision for doubtful accounts	—			1,395			1,883			—			3,278
Deferred income taxes	4,614			(2,657		)	(4,911		)	—			(2,954		)
(Gain) loss on sale of available-for-sale investments	(2		)	(18		)	(49		)	—			(69		)
Decrease (increase) in:
Accounts receivable	—			(1,894		)	3,161			—			1,267
Prepaid expenses and other current assets	(1,075		)	(2,197		)	(852		)	—			(4,124		)
Other assets	(896		)	(83		)	851			—			(128		)
(Decrease) increase in:
Accounts payable and accrued expenses	9,915			(4,119		)	(8,745		)	—			(2,949		)
Income taxes payable	1,734			2,822			3,009			—			7,565
Deferred revenue	—			(942		)	127			—			(815		)
Liability for uncertain tax positions	—			(8,069		)	(2		)	—			(8,071		)
Other	—			(108		)	(272		)	—			(380		)
Net cash provided by operating activities	11,254			42,103			78,764			—			132,121
Cash flows from investing activities:
Maturity of certificates of deposit	—			8,210			6,310			—			14,520
Purchase of certificates of deposit	—			—			—			—			—
Sales of available-for-sale investments	2,005			46,863			11,588			—			60,456
Purchase of available-for-sale investments	(58,591		)	(54,393		)	1			—			(112,983		)
Purchases of property and equipment	—			(925		)	(6,830		)	—			(7,755		)
Proceeds from sale of assets	—			—			608			—			608
Acquisition of businesses, net of cash received	—			—			(118,238		)	—			(118,238		)
Purchases of intangible assets	—			(2,871		)	(1,935		)	—			(4,806		)
Investment in subsidiaries	—			(23,822		)	—			23,822			—
Net cash used in investing activities	(56,586		)	(26,938		)	(108,496		)	23,822			(168,198		)
Cash flows from financing activities:
Issuance of long-term debt	402,500			—			—			—			402,500
Debt issuance costs	(12,069		)	—			542			—			(11,527		)
Repurchases of common stock and restricted stock	(739		)	(4,733		)	(1		)	—			(5,473		)
Issuance of common stock under employee stock purchase plan	76			123			—			—			199
Exercise of stock options	1,193			5,248			—			—			6,441
Dividends paid	(13,267		)	(25,302		)	22			—			(38,547		)
Excess tax benefits from share-based compensation	1,925			4,803			—			—			6,728
Deferred payments for acquisitions	—			—			(14,316		)	—			(14,316		)
Other	—			(54		)	(711		)	—			(765		)
Intercompany	(20,620		)	(14,861		)	59,303			(23,822		)	—
Net cash provided by financing activities	358,999			(34,776		)	44,839			(23,822		)	345,240
Effect of exchange rate changes on cash and cash equivalents	—			4			(1,971		)	—			(1,967		)
Net change in cash and cash equivalents	313,667			(19,607		)	13,136			—			307,196
Cash and cash equivalents at beginning of period	—			34,406			173,395			—			207,801
Cash and cash equivalents at end of period	$	313,667		$	14,799		$	186,531		$	—		$	514,997
j2 Global, Inc.
Condensed Consolidated Balance Sheets
(Unaudited, in thousands except share and per share data)
As of
31-Dec-13
BALANCE SHEET	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
ASSETS
Cash and cash equivalents	$	—		$	34,406		$	173,395		$	—		$	207,801
Short-term investments	—			67,848			22,941			—			90,789
Accounts receivable, net	—			11,541			55,704			—			67,245
Prepaid expenses and other current assets	—			16,662			3,402			—			20,064
Deferred income taxes	—			—			3,126			—			3,126
Intercompany receivable	—			4,433			—			(4,433		)	—
Total current assets	—			134,890			258,568			(4,433		)	389,025
Long-term investments	—			47,351			—			—			47,351
Property and equipment, net	—			11,232			19,968			—			31,200
Trade names, net	—			12,119			70,989			—			83,108
Patent and patent licenses, net	—			15,107			13,423			—			28,530
Customer relationships, net	—			6,125			94,855			—			100,980
Goodwill	—			86,025			371,397			—			457,422
Other purchased intangibles, net	—			5,306			5,609			—			10,915
Investment in subsidiaries	—			357,057			—			(357,057		)	—
Deferred income taxes	—			202			1,643			—			1,845
Other assets	—			1,576			1,837			—			3,413
Total assets	$	—		$	676,990		$	838,289		$	(361,490	)	$	1,153,789
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable and accrued expenses	$	—		$	29,419		$	40,151		$	—		$	69,570
Income taxes payable	—			—			1,569			—			1,569
Deferred revenue - short term	—			23,762			12,564			—			36,326
Liability for uncertain tax positions	—			5,532			3			—			5,535
Deferred income taxes	—			906			986			—			1,892
Intercompany payable	—			—			4,433			(4,433		)	—
Total current liabilities	—			59,619			59,706			(4,433		)	114,892
Long term debt	—			245,670			—			—			245,670
Liability for uncertain tax positions	—			38,329			—			—			38,329
Deferred income taxes	—			—			35,833			—			35,833
Deferred revenue - long term	—			10,753			436			—			11,189
Other long-term liabilities	—			989			469			—			1,458
Total liabilities	—			355,360			96,444			(4,433		)	447,371
Common stock, $0.01 par value	—			461			34			(34		)	461
Additional paid-in capital - common	—			216,871			326,984			(326,983		)	216,872
Retained earnings	—			97,754			417,136			(30,040		)	484,850
Accumulated other comprehensive loss	—			6,544			(2,309		)	—			4,235
Total j2 Global Inc., stockholders’ equity	—			321,630			741,845			(357,057		)	706,418
Noncontrolling interests	—			—			—			—			—
Total stockholders’ equity	—			321,630			741,845			(357,057		)	706,418
Total liabilities and stockholders’ equity	$	—		$	676,990		$	838,289		$	(361,490	)	$	1,153,789
j2 Global, Inc.
Condensed Consolidated Statements of Income
(Unaudited, in thousands except share and per share data)
Three Months Ended
30-Sep-13
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	70,126		$	71,865		$	(14,203	)	$	127,788
Cost of revenues	—			21,378			14,501			(14,078		)	21,801
Gross profit	—			48,748			57,364			(125		)	105,987
Operating expenses:
Sales and marketing	—			10,577			24,335			(125		)	34,787
Research, development and engineering	—			3,323			2,677			—			6,000
General and administrative	—			9,238			16,654			—			25,892
Total operating expenses	—			23,138			43,666			(125		)	66,679
Operating income	—			25,610			13,698			—			39,308
Interest expense (income), net	—			2,263			2,709			—			4,972
Other expense (income), net	—			(67		)	(329		)	—			(396		)
Income before income taxes	—			23,414			11,318			—			34,732
Income tax expense	—			3,101			4,004			—			7,105
Net income	$	—		$	20,313		$	7,314		$	—		$	27,627
Less net loss attributable to noncontrolling interest	—			—			—			(179		)	(179		)
Net income attributable to j2 Global, Inc. common shareholders	$	—		$	20,313		$	7,314		$	179		$	27,806
j2 Global, Inc.
Condensed Consolidated Statements of Income
(Unaudited, in thousands except share and per share data)
Nine Months Ended
30-Sep-13
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	199,696		$	228,681		$	(45,611	)	$	382,766
Cost of revenues	—			63,286			46,701			(45,272		)	64,715
Gross profit	—			136,410			181,980			(339		)	318,051
Operating expenses:
Sales and marketing	—			31,849			68,128			(339		)	99,638
Research, development and engineering	—			9,375			9,759			—			19,134
General and administrative	—			27,693			46,684			—			74,377
Total operating expenses	—			68,917			124,571			(339		)	193,149
Operating income	—			67,493			57,409			—			124,902
Interest expense (income), net	—			7,496			7,213			—			14,709
Other expense (income), net	—			(166		)	(434		)	—			(600		)
Income before income taxes	—			60,163			50,630			—			110,793
Income tax expense	—			17,478			6,950			—			24,428
Net income	$	—		$	42,685		$	43,680		$	—		$	86,365
Less net loss attributable to noncontrolling interest	—			—			—			(403		)	(403		)
Net income attributable to j2 Global, Inc. common shareholders	$	—		$	42,685		$	43,680		$	403		$	86,768
j2 Global, Inc.
Condensed Consolidated Statements of Comprehensive Income
(Unaudited, in thousands)
Three Months Ended
30-Sep-13
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	—		$	20,313		$	7,314		$	—		$	27,627
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			(586		)	2,176			—			1,590
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			4,247			12			—			4,259
Other comprehensive income (loss), net of tax	—			3,661			2,188			—			5,849
Comprehensive income	—			23,974			9,502			—			33,476
Net loss attributable to noncontrolling interest	—			—			—			(179		)	(179		)
Foreign currency translation adjustment attributable to noncontrolling interest, net of tax expense (benefit)	—			—			(13		)	—			(13		)
Comprehensive income attributable to j2 Global, Inc.	$	—		$	23,974		$	9,515		$	179		$	33,668
j2 Global, Inc.
Condensed Consolidated Statements of Comprehensive Income
(Unaudited, in thousands)
Nine Months Ended
30-Sep-13
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	—		$	42,685		$	43,680		$	—		$	86,365
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			(159		)	(367		)	—			(526		)
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			5,767			3,493			—			9,260
Other comprehensive income (loss), net of tax	—			5,608			3,126			—			8,734
Comprehensive income	—			48,293			46,806			—			95,099
Net loss attributable to noncontrolling interest	—			—			—			(403		)	(403		)
Foreign currency translation adjustment attributable to noncontrolling interest, net of tax expense (benefit)	—			—			(35		)	—			(35		)
Comprehensive income attributable to j2 Global, Inc.	$	—		$	48,293		$	46,841		$	403		$	95,537
j2 Global, Inc.
Condensed Consolidated Statement of Cash Flows
(Unaudited, in thousands)
Nine Months Ended
30-Sep-13
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Cash flows from operating activities:
Net income	$	—		$	42,685		$	43,680		$	—		$	86,365
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	—			6,659			21,765			—			28,424
Amortization of discount or premium of investments	—			948			375			—			1,323
Amortization of financing costs and discounts	—			456			—			—			456
Share-based compensation	—			7,108			—			—			7,108
Excess tax benefits from share-based compensation	—			(3,171		)	—			—			(3,171		)
Provision for doubtful accounts	—			1,016			1,549			—			2,565
Deferred income taxes	—			451			21			—			472
Loss on sale of available-for-sale investment	—			—			103			—			103
Decrease (increase) in:
Accounts receivable	—			(1,514		)	(5,981		)	—			(7,495		)
Prepaid expenses and other current assets	—			1,227			(282		)	—			945
Other assets	—			(7		)	189			—			182
(Decrease) increase in:
Accounts payable and accrued expenses	—			(9,583		)	13,618			—			4,035
Income taxes payable	—			(1,235		)	(2,051		)	—			(3,286		)
Deferred revenue	—			14,331			(1,282		)	—			13,049
Liability for uncertain tax positions	—			3,865			2			—			3,867
Other	—			(44		)	(18		)	—			(62		)
Net cash provided by operating activities	—			63,192			71,688			—			134,880
Cash flows from investing activities:
Maturity of certificates of deposit	—			30,270			12,345			—			42,615
Purchase of certificates of deposit	—			(16,375		)	(5,696		)	—			(22,071		)
Sales of available-for-sale investments	—			72,384			10,505			—			82,889
Purchase of available-for-sale investments	—			(119,049		)	(20,906		)	—			(139,955		)
Purchases of property and equipment	—			(4,134		)	(6,982		)	—			(11,116		)
Proceeds from sale of assets	—			1			—			—			1
Acquisition of businesses, net of cash received	—			(2,305		)	(79,261		)	—			(81,566		)
Purchases of intangible assets	—			(1,828		)	(956		)	—			(2,784		)
Investment in subsidiaries	—			(12,498		)	—			12,498			—
Other	—			3,281			(3,281		)	—			—
Net cash used in investing activities	—			(50,253		)	(94,232		)	12,498			(131,987		)
Cash flows from financing activities:
Debt issuance costs	—			(47		)	—			—			(47		)
Repurchases of common stock and restricted stock	—			(4,514		)	1			—			(4,513		)
Issuance of common stock under employee stock purchase plan	—			161			—			—			161
Exercise of stock options	—			13,515			—			—			13,515
Dividends paid	—			(33,267		)	—			—			(33,267		)
Excess tax benefits from share-based compensation	—			3,171			—			—			3,171
Other	—			—			(171		)	—			(171		)
Intercompany	—			(18,120		)	30,618			(12,498		)	—
Net cash used in financing activities	—			(39,101		)	30,448			(12,498		)	(21,151		)
Effect of exchange rate changes on cash and cash equivalents	—			(23		)	(1,218		)	—			(1,241		)
Net change in cash and cash equivalents	—			(26,185		)	6,686			—			(19,499		)
Cash and cash equivalents at beginning of period	—			76,712			141,968			—			218,680
Cash and cash equivalents at end of period	$	—		$	50,527		$	148,654		$	—		$	199,181

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	Subsequent Events
	On October 30, 2014, the Company's Board of Directors approved a quarterly cash dividend of $0.2850 per share of common stock payable on December 4, 2014 to all stockholders of record as of the close of business on November 17, 2014.

Basis_Of_Presentation_Policy

Basis Of Presentation (Policy)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Use Of Estimates	'
	Use of Estimates
	The preparation of consolidated financial statements in accordance with 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. 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 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 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. 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 September 30, 2014 and December 31, 2013, 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. 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 debt within long-term other assets and recorded the amounts paid to the lender as 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 September 30, 2014 and December 31, 2013, 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 amount is immaterial in comparison to the total amount of the Company’s cash and cash equivalents held by these institutions which is not insured.
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 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.
Comparability of Prior Year Financial Data, Policy [Policy Text Block]	'
	Reclassifications
	Certain prior year reported amounts have been reclassified to conform with the 2014 presentation.

Business_Acquisition_Tables

Business Acquisition (Tables)	9 Months Ended
	Sep. 30, 2014
Business Acquisition, Pro Forma Information [Table Text Block]	'
	The supplemental information on an unaudited pro forma financial basis presents the combined results of j2 Global and its 2014 acquisitions as if each acquisition had occurred on January 1, 2013 (in thousands, except per share amounts):
		Nine Months Ended September 30, 2014		Nine Months Ended September 30, 2013
		(unaudited)		(unaudited)
	Revenues	$	474,749	$	440,030
	Net Income	$	96,031	$	89,043
	EPS - Basic	$	2.01	$	1.93
	EPS - Diluted	$	2	$	1.9
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	'
	The following table summarizes the allocation of the purchase consideration for these acquisitions (in thousands):
	Asset	Valuation
	Accounts Receivable	$	11,291
	Property and Equipment	8,686
	Other Assets	3,339
	Deferred Tax Asset	1,877
	Software	2,474
	Trade Names	2,387
	Customer Relationships	65,153
	Other Intangibles	1,477
	Goodwill	79,600
	Total	$	176,284

Investments_Tables

Investments (Tables)	9 Months Ended
	Sep. 30, 2014
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):
		September 30,		December 31, 2013
		2014
	Due within 1 year	$	81,410	$	46,339
	Due within more than 1 year but less than 5 years	58,955		44,865
	Due within more than 5 years but less than 10 years	—		—
	Due 10 years or after	2,459		2,486
	Total	$	142,824	$	93,690
Schedule Of Available-For-Sale And Trading Securities	'
	The following table summarizes the Company’s investments designated as available-for-sale (in thousands):
		September 30,		December 31, 2013
		2014
	Available-for-sale	$	168,833	$	123,737
	Total	$	168,833	$	123,737
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 available-for-sale investments as of September 30, 2014 and December 31, 2013 aggregated by major security type (in thousands):
		Amortized		Gross		Gross			Fair
		Cost		Unrealized		Unrealized			Value
				Gains		Losses
	September 30, 2014
	Debt Securities	$	142,730	$	188	$	(94	)	$	142,824
	Equity Securities	20,610		5,631		(232		)	26,009
	Total	$	163,340	$	5,819	$	(326	)	$	168,833
	December 31, 2013
	Debt Securities	$	93,569	$	158	$	(37	)	$	93,690
	Equity Securities	20,610		9,558		(121		)	30,047
	Total	$	114,179	$	9,716	$	(158	)	$	123,737

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2014
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 instruments that are measured at fair value on a recurring basis (in thousands):
	September 30, 2014	Level 1		Level 2		Level 3		Fair Value
	Cash equivalents:
	Money market and other funds	$	328,786	$	—	$	—	$	328,786
	Time deposits	—		52,057		—		52,057
	Corporate commercial papers	—		12,004		—		12,004
	Equity securities	26,009		—		—		26,009
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	—		42,387		—		42,387
	Debt securities issued by states of the U.S. and political subdivisions of the states	—		2,119		—		2,119
	Debt securities issued by foreign governments	—		2,033		—		2,033
	Corporate debt securities	—		96,285		—		96,285
	Total	$	354,795	$	206,885	$	—	$	561,680
	December 31, 2013	Level 1		Level 2		Level 3		Fair Value
	Cash equivalents:
	Money market and other funds	$	101,232	$	—	$	—	$	101,232
	Time deposits	22,773		—		—		22,773
	Certificates of deposit	14,402		—		—		14,402
	Equity securities	30,047		—		—		30,047
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	23,702		—		—		23,702
	Debt securities issued by states of the U.S. and political subdivisions of the states	3,296		—		—		3,296
	Corporate debt securities	66,692		—		—		66,692
	Total	$	262,144	$	—	$	—	$	262,144

Goodwill_And_Intangible_Assets1

Goodwill And Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Changes In Carrying Amounts Of Goodwill	'
	The changes in carrying amounts of goodwill for the nine months ended September 30, 2014 are as follows (in thousands):
	Balance as of January 1, 2014	$	457,422
	Goodwill acquired (Note 3)	79,600
	Purchase accounting adjustments	(975		)
	Foreign exchange translation	(2,644		)
	Balance as of September 30, 2014	$	533,403
Schedule Of Intangible Assets With Indefinite Lives	'
	Intangible Assets with Indefinite Lives:
		September 30,				December 31,
		2014				2013
	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 September 30, 2014, intangible assets subject to amortization relate primarily to the following (in thousands):
		Weighted-Average		Historical				Accumulated			Net
		Amortization		Cost				Amortization
		Period
	Tradenames	16.6 years		$	69,067			$	(12,253	)	$	56,814
	Patent and patent licenses	7.8 years		62,836				(35,944		)	26,892
	Customer relationships	8.5 years		201,827				(57,429		)	144,398
	Other purchased intangibles	5.1 years		20,183				(17,594		)	2,589
	Total			$	353,913			$	(123,220	)	$	230,693
	As of December 31, 2013, intangible assets subject to amortization relate primarily to the following (in thousands):
		Weighted-Average		Historical				Accumulated			Net
		Amortization		Cost				Amortization
		Period
	Tradenames	17.0 years		$	66,911			$	(11,182	)	$	55,729
	Patent and patent licenses	8.1 years		58,446				(29,916		)	28,530
	Customer relationships	8.1 years		139,362				(38,382		)	100,980
	Other purchased intangibles	5.0 years		18,149				(12,666		)	5,483
	Total			$	282,868			$	(92,146	)	$	190,722

Long_Term_Debt_Tables

Long Term Debt (Tables)	9 Months Ended
	Sep. 30, 2014
Long-term Debt, Unclassified [Abstract]	'
Schedule of Long-term Debt Instruments [Table Text Block]	'
	Long-term debt as of September 30, 2014 consists of the following (in thousands):
	Notes	$	246,055
	Convertible Notes	345,409
	Total long-term debt	591,464
	Less: current portion	—
	Total long-term debt, less current portion	$	591,464

Stock_Options_And_Employee_Sto1

Stock Options And Employee Stock Purchase Plan (Tables)	9 Months Ended
	Sep. 30, 2014
Stock Options Activity	'
	The following table represents stock option activity for the nine months ended September 30, 2014:
		Number of		Weighted-				Weighted-Average		Aggregate
		Shares		Average				Remaining		Intrinsic
				Exercise				Contractual		Value
				Price				Term (in years)
	Outstanding at January 1, 2014	1,175,657		$	21.21
	Granted	—		—
	Exercised	(424,706	)	15.59
	Canceled	(15,000	)	31.07
	Outstanding at September 30, 2014	735,951		24.25				4.1		$	18,476,543
	Exercisable at September 30, 2014	623,739		23.72				3.7		$	15,991,979
	Vested and expected to vest at September 30, 2014	721,497		$	24.19			4.1		$	18,163,534
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 and nine months ended September 30, 2014 and 2013 (in thousands):
		Three Months Ended September 30,							Nine Months Ended September 30,
		2014			2013				2014			2013
	Cost of revenues	$	82		$	162			$	263		$	581
	Operating expenses:
	Sales and marketing	443			465				1,360			1,315
	Research, development and engineering	175			103				537			311
	General and administrative	1,491			1,695				4,378			4,901
	Total	$	2,191		$	2,425			$	6,538		$	7,108
Restricted Stock [Member]	'
Restricted Stock And Restricted Stock Unit Award Activity	'
	Restricted stock award activity for the nine months ended September 30, 2014 is set forth below:
		Shares		Weighted-Average
				Grant-Date
				Fair Value
	Nonvested at January 1, 2014	1,178,371		$	18.17
	Granted	176,864		44.65
	Vested	(452,010	)	17.66
	Canceled	(45,070	)	35.55
	Nonvested at September 30, 2014	858,155		$	22.98
Restricted Stock Units (RSUs) [Member]	'
Restricted Stock And Restricted Stock Unit Award Activity	'
	Restricted stock unit award activity for the nine months ended September 30, 2014 is set forth below:
		Number of		Weighted-Average		Aggregate
		Shares		Remaining		Intrinsic
				Contractual		Value
				Term (in years)
	Outstanding at January 1, 2014	109,725
	Granted	16,737
	Vested	(16,258	)
	Canceled	(15,000	)
	Outstanding at September 30, 2014	95,204		2		$	4,699,269
	Vested and expected to vest at September 30, 2014	74,330		1.8		$	3,668,909

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2014
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 September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Numerator for basic and diluted net income per common share:
	Net income attributable to j2 Global, Inc. common shareholders	$	28,759		$	27,806		$	92,573		$	86,768
	Net income available to participating securities (a)	(538		)	(416		)	(1,964		)	(1,455		)
	Net income available to j2 Global, Inc. common shareholders	$	28,221		$	27,390		$	90,609		$	85,313
	Denominator:
	Weighted-average outstanding shares of common stock	46,845,477			45,729,171			46,653,836			45,441,265
	Dilutive effect of:
	Dilutive effect of equity incentive plans	318,435			562,460			334,591			625,339
	Common stock and common stock equivalents	47,163,912			46,291,631			46,988,427			46,066,604
	Net income per share:
	Basic	$	0.6		$	0.6		$	1.94		$	1.88
	Diluted	$	0.6		$	0.59		$	1.93		$	1.85
	(a)	Represents unvested restricted stock awards that contain certain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid).

Geographic_Information_Tables

Geographic Information (Tables)	9 Months Ended
	Sep. 30, 2014
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 September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Revenues by segment:
	Business Cloud Services	$	109,855		$	94,391		$	317,208		$	293,898
	Digital Media	43,218			33,522			114,860			89,207
	Elimination of inter-segment revenues	(55		)	(125		)	(182		)	(339		)
	Total revenues	153,018			127,788			431,886			382,766
	Direct costs by segment(1):
	Business Cloud Services	60,841			48,504			176,609			143,075
	Digital Media	35,872			32,652			97,305			92,845
	Direct costs by segment(1):	96,713			81,156			273,914			235,920
	Business Cloud Services operating income	49,014			45,886			140,599			150,823
	Digital Media operating income (loss)	7,346			871			17,555			(3,638		)
	Segment operating income	56,360			46,757			158,154			147,185
	Global operating costs(2)	9,882			7,449			25,254			22,283
	Income from operations	$	46,478		$	39,308		$	132,900		$	124,902
	(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.
		September 30, 2014			December 31, 2013
	Assets:
	Business Cloud Services	$	853,843		$	818,722
	Digital Media	352,547			333,286
	Total assets from reportable segments	1,206,390			1,152,008
	Corporate	433,614			1,781
	Total assets	$	1,640,004		$	1,153,789
		Nine Months Ended September 30,
		2014			2013
	Capital expenditures:
	Business Cloud Services	$	4,366		$	5,573
	Digital Media	3,066			5,067
	Total from reportable segments	7,432			10,640
	Corporate	323			476
	Total capital expenditures	$	7,755		$	11,116
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Depreciation and amortization:
	Business Cloud Services	$	9,413		$	6,248		$	27,471		$	17,609
	Digital Media	5,250			3,767			15,273			10,335
	Total from reportable segments	14,663			10,015			42,744			27,944
	Corporate	188			168			563			480
	Total depreciation and amortization	$	14,851		$	10,183		$	43,307		$	28,424
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 September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Revenues:
	United States	$	101,381		$	90,447		$	289,656		$	270,444
	Canada	17,698			17,992			52,642			55,137
	Ireland	10,846			10,417			32,118			30,822
	All other countries	23,093			8,932			57,470			26,363
		$	153,018		$	127,788		$	431,886		$	382,766
		September 30,			December 31,
		2014			2013
	Long-lived assets:
	United States	$	176,216		$	170,247
	All other countries	93,264			51,675
	Total	$	269,480		$	221,922

Unrestricted_Subsidiaries_Tabl

Unrestricted Subsidiaries (Tables)	9 Months Ended
	Sep. 30, 2014
Unrestricted Subsidiaires [Abstract]	'
Schedule of Unrestricted Subsidiaries Financial Information [Table Text Block]	'
	The financial position of the Unrestricted Subsidiaries as of September 30, 2014 is as follows (in thousands):
		September 30, 2014
	ASSETS
	Cash and cash equivalents	$	28,093
	Accounts receivable	47,081
	Prepaid expenses and other current assets	3,570
	Deferred income taxes	9,289
	Total current assets	88,033
	Property and equipment, net	12,737
	Trade names, net	50,156
	Patent and patent licenses, net	25,904
	Customer relationships, net	49,885
	Goodwill	148,080
	Other purchased intangibles, net	802
	Deferred income taxes	1,280
	Other assets	1,707
	Total assets	$	378,584
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	$	36,700
	Income taxes payable	249
	Deferred revenue, current	4,044
	Deferred income taxes	—
	Total current liabilities	40,993
	Deferred income taxes	25,238
	Other long-term liabilities	1,541
	Total liabilities	67,772
	Additional paid-in capital	316,124
	Accumulated deficit	(5,306		)
	Accumulated other comprehensive income (loss)	(6		)
	Total stockholders’ equity	310,812
	Total liabilities and stockholders’ equity	$	378,584
	The results of operations of the Unrestricted Subsidiaries for the three and nine months ended September 30, 2014 and 2013 is as follows (in thousands):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014 (1)			2013			2014 (1)			2013
	Revenues	$	43,618		$	33,522		$	115,801		$	89,207
	Cost of revenues	5,299			4,398			13,596			12,682
	Gross profit	38,319			29,124			102,205			76,525
	Operating expenses:
	Sales and marketing	18,163			18,085			49,552			49,049
	Research, development and engineering	1,565			943			3,792			4,401
	General and administrative	13,527			9,225			35,320			26,713
	Total operating expenses	33,255			28,253			88,664			80,163
	Income (loss) from operations	5,064			871			13,541			(3,638		)
	Interest expense (income), net	(3		)	2,633			(5		)	6,350
	Other expense (income), net	518			278			100			85
	Income (loss) before income taxes	4,549			(2,040		)	13,446			(10,073		)
	Income tax expense (benefit)	4,015			1,624			8,250			(1,836		)
	Net income (loss)	$	534		$	(3,664	)	$	5,196		$	(8,237	)
	(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)	9 Months Ended
	Sep. 30, 2014
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 nine months ended September 30, 2014 (in thousands):
		Unrealized Gains (Losses) on Investments			Foreign Currency Translation				Total
	Beginning balance	$	6,056		$	(1,821	)		$	4,235
	Other comprehensive (loss) income before reclassifications	(2,746		)	(4,806		)		(7,552		)
	Amounts reclassified from accumulated other comprehensive income	(15		)	—				(15		)
	Net current period other comprehensive (loss) income	(2,761		)	(4,806		)		(7,567		)
	Ending balance	$	3,295		$	(6,627	)		$	(3,332	)
	The following table summarizes the changes in accumulated balances of other comprehensive income, net of tax, for the three months ended September 30, 2014 (in thousands):
		Unrealized Gains (Losses) on Investments			Foreign Currency Translation				Total
	Beginning balance	$	6,301		$	350			$	6,651
	Other comprehensive (loss) income before reclassifications	(3,008		)	(6,977		)		(9,985		)
	Amounts reclassified from accumulated other comprehensive income	2			—				2
	Net current period other comprehensive (loss) income	(3,006		)	(6,977		)		(9,983		)
	Ending balance	$	3,295		$	(6,627	)		$	(3,332	)
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 and nine months ended September 30, 2014 (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 September 30, 2014			Nine Months Ended September 30, 2014
	Unrealized gain on available-for-sale investments		1			(25		)		Other expense (income), net
			1			(25		)		Total, before income taxes
			1			10				Income tax expense (benefit)
			2			(15		)		Total, net of tax
	Total reclassifications for the period		$	2		$	(15	)		Total, net of tax

Condensed_Consolidating_Financ1

Condensed Consolidating Financials (Tables)	9 Months Ended
	Sep. 30, 2014
Condensed Financial Information [Abstract]	'
Condensed Balance Sheet [Table Text Block]	'
	j2 Global, Inc.
	Condensed Consolidated Balance Sheets
	(Unaudited, in thousands except share and per share data)
	As of
	30-Sep-14
	BALANCE SHEET	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	ASSETS
	Cash and cash equivalents	$	313,667		$	14,799		$	186,531		$	—		$	514,997
	Short-term investments	62,647			39,767			5,004			—			107,418
	Accounts receivable, net	—			11,213			63,803			—			75,016
	Prepaid expenses and other current assets	1,075			16,237			7,505			—			24,817
	Deferred income taxes	—			—			9,081			(1,630		)	7,451
	Intercompany receivable	—			81,095			—			(81,095		)	—
	Total current assets	377,389			163,111			271,924			(82,725		)	729,699
	Long-term investments	54,353			7,061			1			—			61,415
	Property and equipment, net	—			8,349			30,438			—			38,787
	Trade names, net	—			10,273			73,920			—			84,193
	Patent and patent licenses, net	—			921			25,971			—			26,892
	Customer relationships, net	—			1,049			143,349			—			144,398
	Goodwill	—			50,803			482,600			—			533,403
	Other purchased intangibles, net	—			4,308			3,713			—			8,021
	Investment in subsidiaries	231,027			442,726			8,716			(682,469		)	—
	Deferred income taxes	—			6,309			3,178			(9,487		)	—
	Other assets	9,684			1,488			2,024			—			13,196
	Total assets	$	672,453		$	696,398		$	1,045,834		$	(774,681	)	$	1,640,004
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	$	7,486		$	23,100		$	40,195		$	—		$	70,781
	Income taxes payable	—			398			789			—			1,187
	Deferred revenue - short term	—			23,312			34,087			—			57,399
	Deferred income taxes	856			1,365			—			(1,630		)	591
	Other current liabilities	—			—			540			—			540
	Intercompany payable	42,256			—			38,839			(81,095		)	—
	Total current liabilities	50,598			48,175			114,450			(82,725		)	130,498
	Long term debt	345,409			246,055			—			—			591,464
	Liability for uncertain tax positions	—			35,793			—			—			35,793
	Deferred income taxes	24,332			—			46,865			(9,487		)	61,710
	Deferred revenue - long term	—			8,870			2,075			—			10,945
	Other long-term liabilities	—			881			5,152			—			6,033
	Total liabilities	420,339			339,774			168,542			(92,212		)	836,443
	Common stock, $0.01 par value.	469			—			—			—			469
	Additional paid-in capital - common	270,857			231,027			421,401			(652,428		)	270,857
	Retained earnings	(19,276		)	120,214			464,670			(30,041		)	535,567
	Accumulated other comprehensive loss	64			5,383			(8,779		)	—			(3,332		)
	Total j2 Global Inc., stockholders’ equity	252,114			356,624			877,292			(682,469		)	803,561
	Total stockholders’ equity	252,114			356,624			877,292			(682,469		)	803,561
	Total liabilities and stockholders’ equity	$	672,453		$	696,398		$	1,045,834		$	(774,681	)	$	1,640,004
	j2 Global, Inc.
	Condensed Consolidated Balance Sheets
	(Unaudited, in thousands except share and per share data)
	As of
	31-Dec-13
	BALANCE SHEET	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	ASSETS
	Cash and cash equivalents	$	—		$	34,406		$	173,395		$	—		$	207,801
	Short-term investments	—			67,848			22,941			—			90,789
	Accounts receivable, net	—			11,541			55,704			—			67,245
	Prepaid expenses and other current assets	—			16,662			3,402			—			20,064
	Deferred income taxes	—			—			3,126			—			3,126
	Intercompany receivable	—			4,433			—			(4,433		)	—
	Total current assets	—			134,890			258,568			(4,433		)	389,025
	Long-term investments	—			47,351			—			—			47,351
	Property and equipment, net	—			11,232			19,968			—			31,200
	Trade names, net	—			12,119			70,989			—			83,108
Patent and patent licenses, net	—			15,107			13,423			—			28,530
Customer relationships, net	—			6,125			94,855			—			100,980
Goodwill	—			86,025			371,397			—			457,422
Other purchased intangibles, net	—			5,306			5,609			—			10,915
Investment in subsidiaries	—			357,057			—			(357,057		)	—
Deferred income taxes	—			202			1,643			—			1,845
Other assets	—			1,576			1,837			—			3,413
Total assets	$	—		$	676,990		$	838,289		$	(361,490	)	$	1,153,789
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable and accrued expenses	$	—		$	29,419		$	40,151		$	—		$	69,570
Income taxes payable	—			—			1,569			—			1,569
Deferred revenue - short term	—			23,762			12,564			—			36,326
Liability for uncertain tax positions	—			5,532			3			—			5,535
Deferred income taxes	—			906			986			—			1,892
Intercompany payable	—			—			4,433			(4,433		)	—
Total current liabilities	—			59,619			59,706			(4,433		)	114,892
Long term debt	—			245,670			—			—			245,670
Liability for uncertain tax positions	—			38,329			—			—			38,329
Deferred income taxes	—			—			35,833			—			35,833
Deferred revenue - long term	—			10,753			436			—			11,189
Other long-term liabilities	—			989			469			—			1,458
Total liabilities	—			355,360			96,444			(4,433		)	447,371
Common stock, $0.01 par value	—			461			34			(34		)	461
Additional paid-in capital - common	—			216,871			326,984			(326,983		)	216,872
Retained earnings	—			97,754			417,136			(30,040		)	484,850
Accumulated other comprehensive loss	—			6,544			(2,309		)	—			4,235
Total j2 Global Inc., stockholders’ equity	—			321,630			741,845			(357,057		)	706,418
Noncontrolling interests	—			—			—			—			—
Total stockholders’ equity	—			321,630			741,845			(357,057		)	706,418
Total liabilities and stockholders’ equity	$	—		$	676,990		$	838,289		$	(361,490	)	$	1,153,789
Condensed Income Statement [Table Text Block]	'
	j2 Global, Inc.
	Condensed Consolidated Statements of Income
	(Unaudited, in thousands except share and per share data)
	Nine Months Ended
	30-Sep-14
		j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Revenues:
	Total revenues	$	—		$	169,467		$	293,530		$	(31,111	)	$	431,886
	Cost of revenues	—			35,729			72,191			(30,929		)	76,991
	Gross profit	—			133,738			221,339			(182		)	354,895
	Operating expenses:
	Sales and marketing	—			27,148			78,369			(182		)	105,335
	Research, development and engineering	—			10,411			12,040			—			22,451
	General and administrative	3,463			24,004			66,742			—			94,209
	Total operating expenses	3,463			61,563			157,151			(182		)	221,995
	Operating income	(3,463		)	72,175			64,188			—			132,900
	Interest expense (income), net	5,786			15,314			(347		)	—			20,753
	Other expense (income), net	(2		)	6			(258		)	—			(254		)
	Income before income taxes	(9,247		)	56,855			64,793			—			112,401
	Income tax expense	(3,537		)	4,783			18,582			—			19,828
	Net income attributable to j2 Global, Inc. common shareholders	$	(5,710	)	$	52,072		$	46,211		$	—		$	92,573
	j2 Global, Inc.
	Condensed Consolidated Statements of Income
	(Unaudited, in thousands except share and per share data)
	Nine Months Ended
	30-Sep-13
		j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Revenues:
	Total revenues	$	—		$	199,696		$	228,681		$	(45,611	)	$	382,766
	Cost of revenues	—			63,286			46,701			(45,272		)	64,715
	Gross profit	—			136,410			181,980			(339		)	318,051
	Operating expenses:
	Sales and marketing	—			31,849			68,128			(339		)	99,638
	Research, development and engineering	—			9,375			9,759			—			19,134
	General and administrative	—			27,693			46,684			—			74,377
	Total operating expenses	—			68,917			124,571			(339		)	193,149
	Operating income	—			67,493			57,409			—			124,902
	Interest expense (income), net	—			7,496			7,213			—			14,709
	Other expense (income), net	—			(166		)	(434		)	—			(600		)
	Income before income taxes	—			60,163			50,630			—			110,793
	Income tax expense	—			17,478			6,950			—			24,428
	Net income	$	—		$	42,685		$	43,680		$	—		$	86,365
	Less net loss attributable to noncontrolling interest	—			—			—			(403		)	(403		)
	Net income attributable to j2 Global, Inc. common shareholders	$	—		$	42,685		$	43,680		$	403		$	86,768
	j2 Global, Inc.
	Condensed Consolidated Statements of Income
	(Unaudited, in thousands except share and per share data)
	Three Months Ended
	30-Sep-13
		j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Revenues:
	Total revenues	$	—		$	70,126		$	71,865		$	(14,203	)	$	127,788
	Cost of revenues	—			21,378			14,501			(14,078		)	21,801
	Gross profit	—			48,748			57,364			(125		)	105,987
	Operating expenses:
	Sales and marketing	—			10,577			24,335			(125		)	34,787
	Research, development and engineering	—			3,323			2,677			—			6,000
	General and administrative	—			9,238			16,654			—			25,892
	Total operating expenses	—			23,138			43,666			(125		)	66,679
	Operating income	—			25,610			13,698			—			39,308
	Interest expense (income), net	—			2,263			2,709			—			4,972
	Other expense (income), net	—			(67		)	(329		)	—			(396		)
	Income before income taxes	—			23,414			11,318			—			34,732
Income tax expense	—			3,101			4,004			—			7,105
Net income	$	—		$	20,313		$	7,314		$	—		$	27,627
Less net loss attributable to noncontrolling interest	—			—			—			(179		)	(179		)
Net income attributable to j2 Global, Inc. common shareholders	$	—		$	20,313		$	7,314		$	179		$	27,806
j2 Global, Inc.
Condensed Consolidated Statements of Income
(Unaudited, in thousands except share and per share data)
Three Months Ended
30-Sep-14
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	52,960		$	90,854		$	9,204		$	153,018
Cost of revenues	—			(3,275		)	22,060			9,259			28,044
Gross profit	—			56,235			68,794			(55		)	124,974
Operating expenses:
Sales and marketing	—			9,168			27,934			(55		)	37,047
Research, development and engineering	—			3,320			4,317			—			7,637
General and administrative	3,063			6,789			23,960			—			33,812
Total operating expenses	3,063			19,277			56,211			(55		)	78,496
Operating income	(3,063		)	36,958			12,583			—			46,478
Interest expense (income), net	5,136			5,116			(129		)	—			10,123
Other expense (income), net	(2		)	78			175			—			251
Income before income taxes	(8,197		)	31,764			12,537			—			36,104
Income tax expense	(3,158		)	3,458			7,045			—			7,345
Net income attributable to j2 Global, Inc. common shareholders	$	(5,039	)	$	28,306		$	5,492		$	—		$	28,759
Condensed Comprehensive Income Statement [Table Text Block]	'
	j2 Global, Inc.
	Condensed Consolidated Statements of Comprehensive Income
	(Unaudited, in thousands except share and per share data)
	Three Months Ended
	30-Sep-14
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Net income	$	(5,039	)	$	28,306		$	5,492		$	—		$	28,759
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment, net of tax expense (benefit)	—			2,300			(9,277		)	—			(6,977		)
	Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	64			(3,068		)	(2		)	—			(3,006		)
	Other comprehensive income (loss), net of tax	64			(768		)	(9,279		)	—			(9,983		)
	Comprehensive income attributable to j2 Global, Inc.	$	(4,975	)	$	27,538		$	(3,787	)	$	—		$	18,776
	j2 Global, Inc.
	Condensed Consolidated Statements of Comprehensive Income
	(Unaudited, in thousands except share and per share data)
	Nine Months Ended
	30-Sep-14
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Net income	$	(5,710	)	$	52,072		$	46,211		$	—		$	92,573
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment, net of tax expense (benefit)	—			1,644			(6,450		)	—			(4,806		)
	Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	64			(2,834		)	9			—			(2,761		)
	Other comprehensive income (loss), net of tax	64			(1,190		)	(6,441		)	—			(7,567		)
	Comprehensive income attributable to j2 Global, Inc.	$	(5,646	)	$	50,882		$	39,770		$	—		$	85,006
	j2 Global, Inc.
	Condensed Consolidated Statements of Comprehensive Income
	(Unaudited, in thousands)
	Three Months Ended
	30-Sep-13
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Net income	$	—		$	20,313		$	7,314		$	—		$	27,627
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment, net of tax expense (benefit)	—			(586		)	2,176			—			1,590
	Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			4,247			12			—			4,259
	Other comprehensive income (loss), net of tax	—			3,661			2,188			—			5,849
	Comprehensive income	—			23,974			9,502			—			33,476
	Net loss attributable to noncontrolling interest	—			—			—			(179		)	(179		)
	Foreign currency translation adjustment attributable to noncontrolling interest, net of tax expense (benefit)	—			—			(13		)	—			(13		)
	Comprehensive income attributable to j2 Global, Inc.	$	—		$	23,974		$	9,515		$	179		$	33,668
	j2 Global, Inc.
	Condensed Consolidated Statements of Comprehensive Income
	(Unaudited, in thousands)
	Nine Months Ended
	30-Sep-13
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Net income	$	—		$	42,685		$	43,680		$	—		$	86,365
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment, net of tax expense (benefit)	—			(159		)	(367		)	—			(526		)
	Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			5,767			3,493			—			9,260
	Other comprehensive income (loss), net of tax	—			5,608			3,126			—			8,734
	Comprehensive income	—			48,293			46,806			—			95,099
	Net loss attributable to noncontrolling interest	—			—			—			(403		)	(403		)
	Foreign currency translation adjustment attributable to noncontrolling interest, net of tax expense (benefit)	—			—			(35		)	—			(35		)
	Comprehensive income attributable to j2 Global, Inc.	$	—		$	48,293		$	46,841		$	403		$	95,537
Condensed Cash Flow Statement [Table Text Block]	'
	j2 Global, Inc.
	Condensed Consolidated Statement of Cash Flows
	(Unaudited, in thousands)
	Nine Months Ended
	30-Sep-14
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Cash flows from operating activities:
	Net income	$	(5,710	)	$	52,072		$	46,211		$	—		$	92,573
	Adjustments to reconcile net earnings to net cash provided by operating activities:
	Depreciation and amortization	—			4,950			38,357			—			43,307
	Amortization of discount or premium of investments	142			677			164			—			983
	Amortization of financing costs and discounts	2,266			562			—			—			2,828
	Share-based compensation	2,191			4,514			(167		)	—			6,538
	Excess tax benefits from share-based compensation	(1,925		)	(4,802		)	(1		)	—			(6,728		)
	Provision for doubtful accounts	—			1,395			1,883			—			3,278
	Deferred income taxes	4,614			(2,657		)	(4,911		)	—			(2,954		)
	(Gain) loss on sale of available-for-sale investments	(2		)	(18		)	(49		)	—			(69		)
	Decrease (increase) in:
	Accounts receivable	—			(1,894		)	3,161			—			1,267
	Prepaid expenses and other current assets	(1,075		)	(2,197		)	(852		)	—			(4,124		)
	Other assets	(896		)	(83		)	851			—			(128		)
	(Decrease) increase in:
	Accounts payable and accrued expenses	9,915			(4,119		)	(8,745		)	—			(2,949		)
	Income taxes payable	1,734			2,822			3,009			—			7,565
	Deferred revenue	—			(942		)	127			—			(815		)
	Liability for uncertain tax positions	—			(8,069		)	(2		)	—			(8,071		)
	Other	—			(108		)	(272		)	—			(380		)
	Net cash provided by operating activities	11,254			42,103			78,764			—			132,121
	Cash flows from investing activities:
	Maturity of certificates of deposit	—			8,210			6,310			—			14,520
	Purchase of certificates of deposit	—			—			—			—			—
	Sales of available-for-sale investments	2,005			46,863			11,588			—			60,456
	Purchase of available-for-sale investments	(58,591		)	(54,393		)	1			—			(112,983		)
	Purchases of property and equipment	—			(925		)	(6,830		)	—			(7,755		)
	Proceeds from sale of assets	—			—			608			—			608
	Acquisition of businesses, net of cash received	—			—			(118,238		)	—			(118,238		)
	Purchases of intangible assets	—			(2,871		)	(1,935		)	—			(4,806		)
	Investment in subsidiaries	—			(23,822		)	—			23,822			—
	Net cash used in investing activities	(56,586		)	(26,938		)	(108,496		)	23,822			(168,198		)
	Cash flows from financing activities:
	Issuance of long-term debt	402,500			—			—			—			402,500
	Debt issuance costs	(12,069		)	—			542			—			(11,527		)
	Repurchases of common stock and restricted stock	(739		)	(4,733		)	(1		)	—			(5,473		)
	Issuance of common stock under employee stock purchase plan	76			123			—			—			199
	Exercise of stock options	1,193			5,248			—			—			6,441
	Dividends paid	(13,267		)	(25,302		)	22			—			(38,547		)
	Excess tax benefits from share-based compensation	1,925			4,803			—			—			6,728
	Deferred payments for acquisitions	—			—			(14,316		)	—			(14,316		)
	Other	—			(54		)	(711		)	—			(765		)
	Intercompany	(20,620		)	(14,861		)	59,303			(23,822		)	—
	Net cash provided by financing activities	358,999			(34,776		)	44,839			(23,822		)	345,240
	Effect of exchange rate changes on cash and cash equivalents	—			4			(1,971		)	—			(1,967		)
	Net change in cash and cash equivalents	313,667			(19,607		)	13,136			—			307,196
	Cash and cash equivalents at beginning of period	—			34,406			173,395			—			207,801
	Cash and cash equivalents at end of period	$	313,667		$	14,799		$	186,531		$	—		$	514,997
	j2 Global, Inc.
	Condensed Consolidated Statement of Cash Flows
	(Unaudited, in thousands)
	Nine Months Ended
	30-Sep-13
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Cash flows from operating activities:
	Net income	$	—		$	42,685		$	43,680		$	—		$	86,365
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	—			6,659			21,765			—			28,424
Amortization of discount or premium of investments	—			948			375			—			1,323
Amortization of financing costs and discounts	—			456			—			—			456
Share-based compensation	—			7,108			—			—			7,108
Excess tax benefits from share-based compensation	—			(3,171		)	—			—			(3,171		)
Provision for doubtful accounts	—			1,016			1,549			—			2,565
Deferred income taxes	—			451			21			—			472
Loss on sale of available-for-sale investment	—			—			103			—			103
Decrease (increase) in:
Accounts receivable	—			(1,514		)	(5,981		)	—			(7,495		)
Prepaid expenses and other current assets	—			1,227			(282		)	—			945
Other assets	—			(7		)	189			—			182
(Decrease) increase in:
Accounts payable and accrued expenses	—			(9,583		)	13,618			—			4,035
Income taxes payable	—			(1,235		)	(2,051		)	—			(3,286		)
Deferred revenue	—			14,331			(1,282		)	—			13,049
Liability for uncertain tax positions	—			3,865			2			—			3,867
Other	—			(44		)	(18		)	—			(62		)
Net cash provided by operating activities	—			63,192			71,688			—			134,880
Cash flows from investing activities:
Maturity of certificates of deposit	—			30,270			12,345			—			42,615
Purchase of certificates of deposit	—			(16,375		)	(5,696		)	—			(22,071		)
Sales of available-for-sale investments	—			72,384			10,505			—			82,889
Purchase of available-for-sale investments	—			(119,049		)	(20,906		)	—			(139,955		)
Purchases of property and equipment	—			(4,134		)	(6,982		)	—			(11,116		)
Proceeds from sale of assets	—			1			—			—			1
Acquisition of businesses, net of cash received	—			(2,305		)	(79,261		)	—			(81,566		)
Purchases of intangible assets	—			(1,828		)	(956		)	—			(2,784		)
Investment in subsidiaries	—			(12,498		)	—			12,498			—
Other	—			3,281			(3,281		)	—			—
Net cash used in investing activities	—			(50,253		)	(94,232		)	12,498			(131,987		)
Cash flows from financing activities:
Debt issuance costs	—			(47		)	—			—			(47		)
Repurchases of common stock and restricted stock	—			(4,514		)	1			—			(4,513		)
Issuance of common stock under employee stock purchase plan	—			161			—			—			161
Exercise of stock options	—			13,515			—			—			13,515
Dividends paid	—			(33,267		)	—			—			(33,267		)
Excess tax benefits from share-based compensation	—			3,171			—			—			3,171
Other	—			—			(171		)	—			(171		)
Intercompany	—			(18,120		)	30,618			(12,498		)	—
Net cash used in financing activities	—			(39,101		)	30,448			(12,498		)	(21,151		)
Effect of exchange rate changes on cash and cash equivalents	—			(23		)	(1,218		)	—			(1,241		)
Net change in cash and cash equivalents	—			(26,185		)	6,686			—			(19,499		)
Cash and cash equivalents at beginning of period	—			76,712			141,968			—			218,680
Cash and cash equivalents at end of period	$	—		$	50,527		$	148,654		$	—		$	199,181

Basis_Of_Presentation_Details

Basis Of Presentation (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue	$153,018	$127,788	$431,886	$382,766
Net income attributable to j2 Global, Inc. common shareholders	$28,759	$27,806	$92,573	$86,768
Basic earnings per share	$0.60	$0.60	$1.94	$1.88
Diluted earnings per share	$0.60	$0.59	$1.93	$1.85

Business_Acquisition_Details

Business Acquisition (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Goodwill, Acquired During Period	$79,600,000	'
Goodwill	533,403,000	457,422,000
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount	20,900,000	'
Business Acquisition Contributed Total Revenue	32,000,000	'
Total consideration of transaction, net of cash acquired	176,300,000	'
Business Combination, Consideration Transferred, Liabilities Incurred	$34,900,000	'

Business_Acquisition_Business_

Business Acquisition Business Acquisition (Allocation of Aggregate Purchase Price) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Business Acquisition [Line Items]	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	$11,291	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	8,686	'
Business Combination, Purchase Price Allocation Current Noncurrent Assets Prepaid Expense and Other Assets	3,339	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent	1,877	'
Business Combination, Purchase Price Allocation, Goodwill Amount	533,403	457,422
Goodwill, Acquired During Period	79,600	'
Developed Technology Rights [Member]	'	'
Business Acquisition [Line Items]	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	2,474	'
Trade Names [Member]	'	'
Business Acquisition [Line Items]	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	2,387	'
Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	65,153	'
Other Intangible Assets [Member]	'	'
Business Acquisition [Line Items]	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$1,477	'

Business_Acquisition_Business_1

Business Acquisition Business Acquisitions (Supplementary Information On Unaudited Pro Forma Financial Results Of Acquisition) (Details) (2014 Business Acquisitions [Member], USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
2014 Business Acquisitions [Member]	'	'
Business Acquisition, Pro Forma Revenue	$474,749	$440,030
Business Acquisition, Pro Forma Net Income (Loss)	$96,031	$89,043
Business Acquisition, Pro Forma Earnings Per Share, Basic	$2.01	$1.93
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$2	$1.90

Investments_Schedule_Of_Debt_S

Investments (Schedule Of Debt Securities By Contractual Maturity Date) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investments [Abstract]	'	'
Due within 1 year	$81,410	$46,339
Due within more than 1 year but less than 5 years	58,955	44,865
Due within more than 5 years but less than 10 years	0	0
Due 10 years or after	2,459	2,486
Total	$142,824	$93,690

Investments_Schedule_Of_Availa

Investments (Schedule Of Available-For-Sale And Trading Securities) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investments [Abstract]	'	'
Available-for-sale Securities	$168,833	$123,737
Total	$168,833	$123,737

Investments_Summary_Of_Gross_U

Investments (Summary Of Gross Unrealized Gains And Losses And Fair Values) (Details) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	$163,340	$114,179
Available-for-sale Securities, Gross Unrealized Gains	5,819	9,716
Available-for-sale Securities, Gross Unrealized Losses	-326	-158
Available-for-sale Securities	168,833	123,737
Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	20,610	20,610
Available-for-sale Securities, Gross Unrealized Gains	5,631	9,558
Available-for-sale Securities, Gross Unrealized Losses	-232	-121
Available-for-sale Securities	26,009	30,047
Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	142,730	93,569
Available-for-sale Securities, Gross Unrealized Gains	188	158
Available-for-sale Securities, Gross Unrealized Losses	-94	-37
Available-for-sale Securities	$142,824	$93,690

Investments_Investments_Narrat

Investments Investments (Narrative) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Investments [Abstract]	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$78.80	$37.30
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$0.20	$2

Fair_Value_Measurements_Schedu

Fair Value Measurements (Schedule Of Fair Values Of Financial Instruments Measured On Recurring Basis) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Total assets	$561,680	$262,144
Money Market Funds [Member]	'	'
Cash	328,786	101,232
Bank Time Deposits [Member]	'	'
Cash	52,057	22,773
Commercial Paper [Member]	'	'
Cash	12,004	'
Certificates of Deposit [Member]	'	'
Investments	'	14,402
Equity Securities [Member]	'	'
Investments	26,009	30,047
Debt Securities Issued By The U.S Treasury And Other U.S Government Corporations And Agencies [Member]	'	'
Investments	42,387	23,702
Debt Securities Issued By States Of The United States And Political Subdivisions Of The States [Member]	'	'
Investments	2,119	3,296
Debt Securities Issued By Foreign Governments [Member]	'	'
Investments	2,033	'
Corporate Debt Securities [Member]	'	'
Investments	96,285	66,692
Level 1 [Member]	'	'
Total assets	354,795	262,144
Level 1 [Member] | Money Market Funds [Member]	'	'
Cash	328,786	101,232
Level 1 [Member] | Bank Time Deposits [Member]	'	'
Cash	0	22,773
Level 1 [Member] | Commercial Paper [Member]	'	'
Cash	0	'
Level 1 [Member] | Certificates of Deposit [Member]	'	'
Investments	'	14,402
Level 1 [Member] | Equity Securities [Member]	'	'
Investments	26,009	30,047
Level 1 [Member] | Debt Securities Issued By The U.S Treasury And Other U.S Government Corporations And Agencies [Member]	'	'
Investments	0	23,702
Level 1 [Member] | Debt Securities Issued By States Of The United States And Political Subdivisions Of The States [Member]	'	'
Investments	0	3,296
Level 1 [Member] | Debt Securities Issued By Foreign Governments [Member]	'	'
Investments	0	'
Level 1 [Member] | Corporate Debt Securities [Member]	'	'
Investments	0	66,692
Level 2 [Member]	'	'
Total assets	206,885	0
Level 2 [Member] | Money Market Funds [Member]	'	'
Cash	0	0
Level 2 [Member] | Bank Time Deposits [Member]	'	'
Cash	52,057	0
Level 2 [Member] | Commercial Paper [Member]	'	'
Cash	12,004	'
Level 2 [Member] | Certificates of Deposit [Member]	'	'
Investments	'	0
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	42,387	0
Level 2 [Member] | Debt Securities Issued By States Of The United States And Political Subdivisions Of The States [Member]	'	'
Investments	2,119	0
Level 2 [Member] | Debt Securities Issued By Foreign Governments [Member]	'	'
Investments	2,033	'
Level 2 [Member] | Corporate Debt Securities [Member]	'	'
Investments	96,285	0
Level 3 [Member]	'	'
Total assets	0	0
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
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_V

Fair Value Measurements Fair Value Measurements (Narrative) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'	'
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	$206,900,000	'
Long-term Debt	591,464,000	245,670,000
Long-term Debt, Fair Value	$678,300,000	$283,300,000

Goodwill_And_Intangible_Assets2

Goodwill And Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Goodwill	$533,403,000	'	$533,403,000	'	$457,422,000
Amortization expense	10,700,000	7,500,000	32,200,000	21,600,000	'
Estimated future amortization expense in year 2014	44,300,000	'	44,300,000	'	'
Estimated future amortization expense in year 2015	45,600,000	'	45,600,000	'	'
Estimated future amortization expense in year 2016	40,000,000	'	40,000,000	'	'
Estimated future amortization expense in year 2017	33,100,000	'	33,100,000	'	'
Estimated future amortization expense in year 2018	23,800,000	'	23,800,000	'	'
Estimated future amortization expense thereafter	76,100,000	'	76,100,000	'	'
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	385,300,000	'	385,300,000	'	'
Digital Media Segment [Member]	'	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Goodwill	$148,100,000	'	$148,100,000	'	'

Goodwill_And_Intangible_Assets3

Goodwill And Intangible Assets (Changes In Carrying Amounts Of Goodwill And Other Intangible Assets) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Balance as of January 1, 2014	$457,422
Goodwill, Acquired During Period	79,600
Purchase Accounting Adjustments	-975
Foreign Exchange Translation	-2,644
Balance as of September 30, 2014	$533,403

Goodwill_And_Intangible_Assets4

Goodwill And Intangible Assets (Indefinite Intangible Assets) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
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 $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Historical Cost	$353,913	$282,868
Accumulated Amortization	-123,220	-92,146
Net	230,693	190,722
Trade Names [Member]	'	'
Historical Cost	69,067	66,911
Accumulated Amortization	-12,253	-11,182
Net	56,814	55,729
Weighted-Average Amortization Period, years	'16 years 7 months 6 days	'17 years
Patents And Patent Licenses [Member]	'	'
Historical Cost	62,836	58,446
Accumulated Amortization	-35,944	-29,916
Net	26,892	28,530
Weighted-Average Amortization Period, years	'7 years 9 months 18 days	'8 years 1 month 6 days
Customer Relationships [Member]	'	'
Historical Cost	201,827	139,362
Accumulated Amortization	-57,429	-38,382
Net	144,398	100,980
Weighted-Average Amortization Period, years	'8 years 6 months	'8 years 1 month 6 days
Other Purchased Intangibles [Member]	'	'
Historical Cost	20,183	18,149
Accumulated Amortization	-17,594	-12,666
Net	$2,589	$5,483
Weighted-Average Amortization Period, years	'5 years 1 month 6 days	'5 years

Long_Term_Debt_Details

Long Term Debt (Details) (USD $)	9 Months Ended			9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2014	Jun. 10, 2014	Dec. 31, 2013	Sep. 30, 2014	Jul. 26, 2012	Sep. 30, 2014	Sep. 30, 2014	Jun. 10, 2014
				Senior Notes [Member]	Senior Notes [Member]	Convertible Debt Securities [Member]	Convertible Debt Securities [Member]	Convertible Debt Securities [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'
Debt Instrument, Issuance Date	'	'	'	26-Jul-12	'	'	10-Jun-14	'
Debt Instrument, Face Amount	'	'	'	$250,000,000	'	$402,500,000	$402,500,000	'
Debt Instrument, Interest Rate, Stated Percentage	'	'	'	8.00%	'	3.25%	3.25%	'
Debt Instrument, Maturity Date	'	'	'	1-Aug-20	'	'	15-Jun-29	'
Proceeds from Debt, Net of Issuance Costs	'	'	'	245,000,000	'	'	391,400,000	'
Debt Instrument, Unamortized Discount	'	'	'	3,900,000	5,000,000	57,100,000	57,100,000	59,000,000
Debt Instrument, Convertible, Remaining Discount Amortization Period	'	'	'	'	'	'	'6 years 9 months	'
Debt Issuance Cost	'	'	'	'	'	'	11,700,000	'
Unamortized Debt Issuance Expense	'	'	'	1,100,000	'	9,700,000	9,700,000	'
Interest Expense, Debt	'	'	'	'	'	5,300,000	'	'
Debt Instrument, Frequency of Periodic Payment	'	'	'	'semi-annually	'	'	'semiannually	'
Debt Instrument, Date of First Required Payment	'	'	'	1-Feb-13	'	'	15-Dec-14	'
Debt Instrument, Convertible, Carrying Amount of Equity Component	'	37,700,000	'	'	'	'	'	'
Debt Instrument, Call Date, Earliest	'	'	'	1-Aug-16	'	'	'	'
Long-term Debt	591,464,000	'	245,670,000	246,055,000	'	345,409,000	345,409,000	'
Long-term Debt, Current Maturities	0	'	'	'	'	'	'	'
Total long-term debt, less current portion	591,464,000	'	'	'	'	'	'	'
Long-term Debt, Fair Value	678,300,000	'	283,300,000	273,300,000	'	405,000,000	405,000,000	'
Interest Paid	$20,000,000	'	'	'	'	'	'	'

Income_Taxes_Details

Income Taxes (Details) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Dec. 31, 2008

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

California Franchise Tax Board [Member]

California Franchise Tax Board [Member]

California Franchise Tax Board [Member]

Internal Revenue Service (IRS) [Member]

Internal Revenue Service (IRS) [Member]

Internal Revenue Service (IRS) [Member]

Canada Revenue Agency [Member]

Canada Revenue Agency [Member]

Illinois Department of Revenue [Member]

Illinois Department of Revenue [Member]

New York City Department of Finance [Member]

New York City Department of Finance [Member]

New York City Department of Finance [Member]

Income Taxes [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

U.S. federal statutory rate

'

35.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Effective income tax rate

20.30%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income before income taxes, domestic operations

'

$70.50

$56

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income before income taxes, foreign operations

'

41.9

54.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Liabilities for uncertain income tax positions

35.8

35.8

'

43.9

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash paid for income taxes

'

23.6

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Prepaid tax payments

$9.80

$9.80

'

$11.30

'

'

'

'

'

'

'

'

'

'

'

'

'

Income Tax Examination, Year under Examination

'

'

'

'

'2011

'2010

'2009

'2011

'2010

'2009

'2011

'2010

'2009

'2008

'2011

'2010

'2009

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	0 Months Ended				3 Months Ended	9 Months Ended
	Oct. 30, 2014	Aug. 05, 2014	7-May-14	Feb. 12, 2014	Sep. 30, 2014	Sep. 30, 2014
						2012 Repurchase Program [Member]
Class of Stock [Line Items]	'	'	'	'	'	'
Maximum number of shares authorized to be repurchased	'	'	'	'	'	5,000,000
Stock Repurchased	'	'	'	'	'	0
Dividend amount to be paid, per common share	$0.28	$0.28	$0.27	$0.26	'	'
Dividend, declaration date	30-Oct-14	5-Aug-14	7-May-14	11-Feb-14	'	'
Dividend, date to be paid	4-Dec-14	2-Sep-14	3-Jun-14	10-Mar-14	'	'
Dividend, date of record	17-Nov-14	18-Aug-14	19-May-14	24-Feb-14	'	'
Shares Paid for Tax Withholding for Share Based Compensation	'	'	'	'	13,349	'

Stock_Options_And_Employee_Sto2

Stock Options And Employee Stock Purchase Plan (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Allocated Share-based Compensation Expense	$2,191,000	$2,425,000	$6,538,000	$7,108,000	'
Number of options outstanding	735,951	'	735,951	'	1,175,657
Number of options granted	'	'	0	'	'
Cash received upon the issuance of common stock	'	'	199,000	161,000	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	'	'	14,500,000	11,600,000	'
Stock Options [Member]	'	'	'	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	1,000,000	'	1,000,000	'	2,000,000
Restricted Stock And Restricted Stock Unit (RSU) [Member]	'	'	'	'	'
Allocated Share-based Compensation Expense	1,900,000	1,800,000	5,500,000	5,000,000	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	22,600,000	'	22,600,000	'	20,200,000
Restricted Stock [Member]	'	'	'	'	'
Shares, Granted	'	'	176,864	'	'
Weighted-Average Grant-Date Fair Value, Granted	'	'	$44.65	'	'
Number of stocks outstanding	858,155	'	858,155	'	1,178,371
Restricted Stock Units (RSUs) [Member]	'	'	'	'	'
Shares, Granted	'	'	16,737	'	'
Number of stocks outstanding	95,204	'	95,204	'	109,725
1997 Stock Option Plan [Member]	'	'	'	'	'
Additional shares authorized for issuance	'	'	840,000	'	'
Maximum issuance of common stock	12,000,000	'	12,000,000	'	'
1997 Stock Option Plan [Member] | Stock Options [Member]	'	'	'	'	'
Number of options outstanding	224,708	'	224,708	'	'
1997 Stock Option Plan [Member] | Restricted Stock [Member]	'	'	'	'	'
Number of stocks outstanding	0	'	0	'	'
2007 Stock Plan [Member]	'	'	'	'	'
Number of options outstanding	606,447	'	606,447	'	'
Number of stocks outstanding	95,204	'	95,204	'	'
Maximum issuance of common stock	4,500,000	'	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%	'	15.00%	'	'
Number of shares purchased under the plan	'	'	4,463	4,416	'
Cash received upon the issuance of common stock	'	'	$199,000	$161,000	'
Number of shares available for issuance	1,635,736	'	1,635,736	'	'
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 $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Dec. 31, 2013
			Stock Options [Member]	Stock Options [Member]
Number of Shares, Outstanding Beginning of Period	1,175,657	'	'	'
Number of options granted	0	'	'	'
Number of Shares, Exercised	-424,706	'	'	'
Number of Shares, Canceled	-15,000	'	'	'
Number of Shares, Outstanding Ending of Period	735,951	'	'	'
Number of Shares, Exercisable	623,739	'	'	'
Number of Shares, Vested and expected to vest	721,497	'	'	'
Weighted-Average Exercise Price, Outstanding Beginning of Period	$21.21	'	'	'
Weighted-Average Exercise Price, Granted	$0	'	'	'
Weighted-Average Exercise Price, Exercised	$15.59	'	'	'
Weighted-Average Exercise Price, Canceled	$31.07	'	'	'
Weighted-Average Exercise Price, Outstanding Ending of Period	$24.25	'	'	'
Weighted-Average Exercise Price, Exercisable	$23.72	'	'	'
Weighted-Average Exercise Price, Vested and expected to vest	$24.19	'	'	'
Weighted-Average Remaining Contractual Term, Outstanding (in years)	'4 years 1 month 17 days	'	'	'
Weighted-Average Remaining Contractual Term, Exercisable (in years)	'3 years 8 months 5 days	'	'	'
Weighted-Average Remaining Contractual Term, Vested and expected to vest (in years)	'4 years 0 months 29 days	'	'	'
Aggregate Intrinsic Value, Outstanding	$18,476,543	'	'	'
Aggregate Intrinsic Value, Exercisable	15,991,979	'	'	'
Aggregate Intrinsic Value, Vested and expected to vest	18,163,534	'	'	'
Aggregate intrinsic values of options exercised	14,500,000	11,600,000	'	'
Unrecognized compensation cost related to non-vested awards granted	'	'	$1,000,000	$2,000,000
Weighted-average period to recognize compensation cost (in years)	'	'	'1 year 7 months 21 days	'

Stock_Options_And_Employee_Sto4

Stock Options And Employee Stock Purchase Plan (Assumptions To Estimate Fair Value Of Stock Options) (Details)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'
Estimated forfeiture rate	12.22%	15.72%

Stock_Options_And_Employee_Sto5

Stock Options And Employee Stock Purchase Plan (Restricted Stock) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Compensation cost recognized	$2,191,000	$2,425,000	$6,538,000	$7,108,000	'
Allocated Share-based Compensation Expense	2,191,000	2,425,000	6,538,000	7,108,000	'
Restricted Stock And Restricted Stock Unit (RSU) [Member]	'	'	'	'	'
Compensation cost recognized	1,900,000	1,800,000	5,500,000	5,000,000	'
Allocated Share-based Compensation Expense	1,900,000	1,800,000	5,500,000	5,000,000	'
Unrecognized compensation cost related to non-vested awards granted	22,600,000	'	22,600,000	'	20,200,000
Restricted Stock [Member]	'	'	'	'	'
Nonvested at January 1, 2014	'	'	1,178,371	'	'
Shares, Granted	'	'	176,864	'	'
Shares, Vested	'	'	-452,010	'	'
Shares, Canceled	'	'	-45,070	'	'
Nonvested at September 30, 2014	858,155	'	858,155	'	'
Weighted-Average Grant-Date Fair Value, Nonvested at January 1, 2014	'	'	$18.17	'	'
Weighted-Average Grant-Date Fair Value, Granted	'	'	$44.65	'	'
Weighted-Average Grant-Date Fair Value, Vested	'	'	$17.66	'	'
Weighted-Average Grant-Date Fair Value, Canceled	'	'	$35.55	'	'
Weighted-Average Grant-Date Fair Value, Nonvested at June 30, 2014	$22.98	'	$22.98	'	'
Weighted-average period to recognize compensation cost (in years)	'	'	'3 years 1 month 17 days	'	'
Restricted Stock Units (RSUs) [Member]	'	'	'	'	'
Nonvested at January 1, 2014	'	'	109,725	'	'
Shares, Granted	'	'	16,737	'	'
Shares, Vested	'	'	-16,258	'	'
Shares, Canceled	'	'	-15,000	'	'
Nonvested at September 30, 2014	95,204	'	95,204	'	'
Share Based Compensation Equity Awards Other Than Options Expected To Vest Shares	'	'	74,330	'	'
Weighted-average period to recognize compensation cost (in years)	'	'	'	'3 years 4 months 2 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 27 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 22 days	'	'
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Intrinsic Value	3,668,909	'	3,668,909	'	'
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding, Aggregate Intrinsic Value	$4,699,269	'	$4,699,269	'	'

Stock_Options_And_Employee_Sto6

Stock Options And Employee Stock Purchase Plan (Allocation Of Share-Based Compensation Expense) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Allocated Share-based Compensation Expense	$2,191	$2,425	$6,538	$7,108
Cost Of Revenues [Member]	'	'	'	'
Allocated Share-based Compensation Expense	82	162	263	581
Sales And Marketing [Member]	'	'	'	'
Allocated Share-based Compensation Expense	443	465	1,360	1,315
Research, Development And Engineering [Member]	'	'	'	'
Allocated Share-based Compensation Expense	175	103	537	311
General And Administrative [Member]	'	'	'	'
Allocated Share-based Compensation Expense	$1,491	$1,695	$4,378	$4,901

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share Reconciliation [Abstract]	'	'	'	'
Net income attributable to j2 Global, Inc. common shareholders	$28,759	$27,806	$92,573	$86,768
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	538	416	1,964	1,455
Net earnings available to common shareholders	$28,221	$27,390	$90,609	$85,313
Weighted-average outstanding shares of common stock - basic	46,845,477	45,729,171	46,653,836	45,441,265
Dilutive effect of equity incentive plans	318,435	562,460	334,591	625,339
Weighted-average outstanding shares of common stock - diluted	47,163,912	46,291,631	46,988,427	46,066,604
Basic	$0.60	$0.60	$1.94	$1.88
Diluted	$0.60	$0.59	$1.93	$1.85
Share options excluded from the computation of diluted earnings per share	'	'	0	'

Geographic_Information_Details

Geographic Information (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Total revenues	$153,018	$127,788	$431,886	$382,766	'
United States	269,480	'	269,480	'	221,922
Total long-lived assets	269,480	'	269,480	'	221,922
UNITED STATES	'	'	'	'	'
Total revenues	101,381	90,447	289,656	270,444	'
United States	176,216	'	176,216	'	170,247
Total long-lived assets	176,216	'	176,216	'	170,247
CANADA	'	'	'	'	'
Total revenues	17,698	17,992	52,642	55,137	'
IRELAND	'	'	'	'	'
Total revenues	10,846	10,417	32,118	30,822	'
All Other Countries [Member]	'	'	'	'	'
Total revenues	23,093	8,932	57,470	26,363	'
United States	93,264	'	93,264	'	51,675
Total long-lived assets	$93,264	'	$93,264	'	$51,675

Segment_Information_Reportable

Segment Information Reportable Segment Information (Reconciliation of Total Segment Operating Income to Consolidated Operating Income) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]	'	'	'	'
Total revenues	$153,018	$127,788	$431,886	$382,766
Income (loss) from operations	46,478	39,308	132,900	124,902
Global Operating Costs	9,882	7,449	25,254	22,283
Business Cloud Services Segment [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total revenues	109,855	94,391	317,208	293,898
Direct Costs By Segment	60,841	48,504	176,609	143,075
Income (loss) from operations	49,014	45,886	140,599	150,823
Digital Media Segment [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total revenues	43,218	33,522	114,860	89,207
Direct Costs By Segment	35,872	32,652	97,305	92,845
Income (loss) from operations	7,346	871	17,555	-3,638
Intersegment Elimination [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total revenues	-55	-125	-182	-339
Operating Segments [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Income (loss) from operations	$56,360	$46,757	$158,154	$147,185

Segment_Information_Reportable1

Segment Information Reportable Segment Information (Total Assets, Capital Expenditures, Depreciation And Amortization) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Segment Reporting, Other Significant Reconciling Item [Line Items]	'	'	'	'	'
Total assets	$1,640,004	'	$1,640,004	'	$1,153,789
Property, Plant and Equipment, Additions	'	'	7,755	11,116	'
Depreciation, Depletion and Amortization, Nonproduction	14,851	10,183	43,307	28,424	'
Business Cloud Services Segment [Member]	'	'	'	'	'
Segment Reporting, Other Significant Reconciling Item [Line Items]	'	'	'	'	'
Total assets	853,843	'	853,843	'	818,722
Property, Plant and Equipment, Additions	'	'	4,366	5,573	'
Depreciation, Depletion and Amortization, Nonproduction	9,413	6,248	27,471	17,609	'
Digital Media Segment [Member]	'	'	'	'	'
Segment Reporting, Other Significant Reconciling Item [Line Items]	'	'	'	'	'
Total assets	352,547	'	352,547	'	333,286
Property, Plant and Equipment, Additions	'	'	3,066	5,067	'
Depreciation, Depletion and Amortization, Nonproduction	5,250	3,767	15,273	10,335	'
Operating Segments [Member]	'	'	'	'	'
Segment Reporting, Other Significant Reconciling Item [Line Items]	'	'	'	'	'
Total assets	1,206,390	'	1,206,390	'	1,152,008
Property, Plant and Equipment, Additions	'	'	7,432	10,640	'
Depreciation, Depletion and Amortization, Nonproduction	14,663	10,015	42,744	27,944	'
Corporate [Member]	'	'	'	'	'
Segment Reporting, Other Significant Reconciling Item [Line Items]	'	'	'	'	'
Total assets	433,614	'	433,614	'	1,781
Property, Plant and Equipment, Additions	'	'	323	476	'
Depreciation, Depletion and Amortization, Nonproduction	$188	$168	$563	$480	'

Unrestricted_Subsidiaries_Unre

Unrestricted Subsidiaries Unrestricted Subsidiaries (Financial Position) (Details) (USD $)	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Cash and cash equivalents	$514,997	'	$207,801	$199,181	$218,680
Accounts receivable	75,016	'	67,245	'	'
Prepaid expenses and other current assets	24,817	'	20,064	'	'
Deferred income taxes	7,451	'	3,126	'	'
Total current assets	729,699	'	389,025	'	'
Property and equipment, net	38,787	'	31,200	'	'
Tradenames, net	84,193	'	83,108	'	'
Patent and patent licenses, net	26,892	'	28,530	'	'
Customer Relationships, Net	144,398	'	100,980	'	'
Goodwill	533,403	'	457,422	'	'
Other purchased intangibles, net	8,021	'	10,915	'	'
Deferred income taxes	0	'	1,845	'	'
Other assets	13,196	'	3,413	'	'
Total assets	1,640,004	'	1,153,789	'	'
Accounts payable and accrued expenses	70,781	'	69,570	'	'
Income taxes payable	1,187	'	1,569	'	'
Deferred revenue, current	57,399	'	36,326	'	'
Deferred Tax Liabilities, Net, Current	591	'	1,892	'	'
Total current liabilities	130,498	'	114,892	'	'
Deferred income taxes	61,710	'	35,833	'	'
Other long-term liabilities	6,033	'	1,458	'	'
Total liabilities	836,443	'	447,371	'	'
Commitments and contingencies	0	'	0	'	'
Common Stock, Value, Issued	469	'	461	'	'
Additional paid-in capital	270,857	'	216,872	'	'
Retained Earnings (Accumulated Deficit)	535,567	'	484,850	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-3,332	6,651	4,235	'	'
Stockholders' Equity Attributable to Parent	803,561	'	706,418	'	'
Total liabilities and stockholdersb equity	1,640,004	'	1,153,789	'	'
Unrestricted Subsidiaries [Member]	'	'	'	'	'
Cash and cash equivalents	28,093	'	'	'	'
Accounts receivable	47,081	'	'	'	'
Prepaid expenses and other current assets	3,570	'	'	'	'
Deferred income taxes	9,289	'	'	'	'
Total current assets	88,033	'	'	'	'
Property and equipment, net	12,737	'	'	'	'
Tradenames, net	50,156	'	'	'	'
Patent and patent licenses, net	'	25,904	'	'	'
Customer Relationships, Net	49,885	'	'	'	'
Goodwill	148,080	'	'	'	'
Other purchased intangibles, net	802	'	'	'	'
Deferred income taxes	1,280	'	'	'	'
Other assets	1,707	'	'	'	'
Total assets	378,584	'	'	'	'
Accounts payable and accrued expenses	36,700	'	'	'	'
Income taxes payable	249	'	'	'	'
Deferred revenue, current	4,044	'	'	'	'
Deferred Tax Liabilities, Net, Current	0	'	'	'	'
Total current liabilities	40,993	'	'	'	'
Deferred income taxes	25,238	'	'	'	'
Other long-term liabilities	1,541	'	'	'	'
Total liabilities	67,772	'	'	'	'
Additional paid-in capital	316,124	'	'	'	'
Retained Earnings (Accumulated Deficit)	-5,306	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-6	'	'	'	'
Stockholders' Equity Attributable to Parent	310,812	'	'	'	'
Total liabilities and stockholdersb equity	$378,584	'	'	'	'

Unrestricted_Subsidiaries_Unre1

Unrestricted Subsidiaries Unrestricted Subsidiaries (Results of Operations) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Total revenues	$153,018	$127,788	$431,886	$382,766
Cost of revenues	28,044	21,801	76,991	64,715
Gross Profit	124,974	105,987	354,895	318,051
Selling and Marketing Expense	37,047	34,787	105,335	99,638
Research and Development Expense	7,637	6,000	22,451	19,134
General and Administrative Expense	33,812	25,892	94,209	74,377
Operating Expenses	78,496	66,679	221,995	193,149
Income (loss) from operations	46,478	39,308	132,900	124,902
Interest expense (income), net	10,123	4,972	20,753	14,709
Other expense (income), net	251	-396	-254	-600
Income (loss) before income taxes	36,104	34,732	112,401	110,793
Income Tax Expense (Benefit)	7,345	7,105	19,828	24,428
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	28,759	27,627	92,573	86,365
Unrestricted Subsidiaries [Member]	'	'	'	'
Total revenues	43,618	33,522	115,801	89,207
Cost of revenues	5,299	4,398	13,596	12,682
Gross Profit	38,319	29,124	102,205	76,525
Selling and Marketing Expense	18,163	18,085	49,552	49,049
Research and Development Expense	1,565	943	3,792	4,401
General and Administrative Expense	13,527	9,225	35,320	26,713
Operating Expenses	33,255	28,253	88,664	80,163
Income (loss) from operations	5,064	871	13,541	-3,638
Interest expense (income), net	-3	2,633	-5	6,350
Other expense (income), net	518	278	100	85
Income (loss) before income taxes	4,549	-2,040	13,446	-10,073
Income Tax Expense (Benefit)	$4,015	$1,624	$8,250	($1,836)

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income Roll Forward (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) Roll Forward [Line Items]	'	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$3,295	'	$3,295	'	$6,301	$6,056
Unrealized gain on available-for-sale investments, net of tax (benefit)	-3,008	'	-2,746	'	'	'
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	-6,977	'	-4,806	'	'	'
Other Comprehensive Income Loss Arising During Period Total Net of Tax	-9,985	'	-7,552	'	'	'
Foreign currency translation adjustment, net of tax (benefit)	-6,977	1,590	-4,806	-526	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	'	'	4,235	'	6,651	'
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	-3,332	'	-3,332	'	6,651	'
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	2	'	-15	'	'	'
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax	0	'	0	'	'	'
Other Comprehensive Income Loss Reclassification Adjustments Total Net of Tax	2	'	-15	'	'	'
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	-3,006	4,259	-2,761	9,260	'	'
Other Comprehensive Income (Loss), Net of Tax	-9,983	5,849	-7,567	8,734	'	'
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	($6,627)	'	($6,627)	'	$350	($1,821)

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Reclassification out of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]	'	'	'	'
Other expense (income), net	$251	($396)	($254)	($600)
Income Tax Expense (Benefit)	7,345	7,105	19,828	24,428
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	2	'	-15	'
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0	'	0	'
Other Comprehensive Income Loss Reclassification Adjustments Total Net of Tax	2	'	-15	'
Accumulated Net Unrealized Investment Gain (Loss) [Member]	'	'	'	'
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]	'	'	'	'
Other expense (income), net	1	'	25	'
Income Tax Expense (Benefit)	$1	'	$10	'

Condensed_Consolidating_Financ2

Condensed Consolidating Financials Condensed Balance Sheet (Details) (USD $)	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Cash and cash equivalents	$514,997	'	$207,801	$199,181	$218,680
Short-term investments	107,418	'	90,789	'	'
Accounts receivable, net of allowances of $3,582 and $4,105, respectively	75,016	'	67,245	'	'
Prepaid expenses and other current assets	24,817	'	20,064	'	'
Deferred income taxes	7,451	'	3,126	'	'
Due from Affiliate, Current	0	'	0	'	'
Total current assets	729,699	'	389,025	'	'
Long-term investments	61,415	'	47,351	'	'
Property and equipment, net	38,787	'	31,200	'	'
Tradenames, net	84,193	'	83,108	'	'
Patent and patent licenses, net	26,892	'	28,530	'	'
Customer Relationships, Net	144,398	'	100,980	'	'
Goodwill	533,403	'	457,422	'	'
Other purchased intangibles, net	8,021	'	10,915	'	'
Investments in and Advances to Affiliates, Amount of Equity	0	'	0	'	'
Other assets	13,196	'	3,413	'	'
Deferred income taxes	0	'	1,845	'	'
Total assets	1,640,004	'	1,153,789	'	'
Accounts payable and accrued expenses	70,781	'	69,570	'	'
Income taxes payable	1,187	'	1,569	'	'
Deferred revenue, current	57,399	'	36,326	'	'
Liability for Uncertain Tax Positions, Current	0	'	5,535	'	'
Deferred Tax Liabilities, Net, Current	591	'	1,892	'	'
Other current liabilities	540	'	0	'	'
Due to Affiliate, Current	0	'	0	'	'
Total current liabilities	130,498	'	114,892	'	'
Long-term Debt	591,464	'	245,670	'	'
Liability for uncertain tax positions	35,793	'	38,329	'	'
Deferred income taxes	61,710	'	35,833	'	'
Deferred revenue, non-current	10,945	'	11,189	'	'
Other long-term liabilities	6,033	'	1,458	'	'
Total liabilities	836,443	'	447,371	'	'
Commitments and contingencies	0	'	0	'	'
Common Stock, Value, Issued	469	'	461	'	'
Additional paid-in capital	270,857	'	216,872	'	'
Retained Earnings (Accumulated Deficit)	535,567	'	484,850	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-3,332	6,651	4,235	'	'
Stockholders' Equity Attributable to Parent	803,561	'	706,418	'	'
Stockholders' Equity Attributable to Noncontrolling Interest	'	'	0	'	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	803,561	'	706,418	'	'
Total liabilities and stockholdersb equity	1,640,004	'	1,153,789	'	'
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	313,667	'	0	0	0
Short-term investments	62,647	'	0	'	'
Accounts receivable, net of allowances of $3,582 and $4,105, respectively	0	'	0	'	'
Prepaid expenses and other current assets	1,075	'	0	'	'
Deferred income taxes	0	'	0	'	'
Due from Affiliate, Current	0	'	0	'	'
Total current assets	377,389	'	0	'	'
Long-term investments	54,353	'	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	231,027	'	0	'	'
Other assets	9,684	'	0	'	'
Deferred income taxes	0	'	0	'	'
Total assets	672,453	'	0	'	'
Accounts payable and accrued expenses	7,486	'	0	'	'
Income taxes payable	0	'	0	'	'
Deferred revenue, current	0	'	0	'	'
Liability for Uncertain Tax Positions, Current	'	'	0	'	'
Deferred Tax Liabilities, Net, Current	856	'	0	'	'
Other current liabilities	0	'	'	'	'
Due to Affiliate, Current	42,256	'	0	'	'
Total current liabilities	50,598	'	0	'	'
Long-term Debt	345,409	'	0	'	'
Liability for uncertain tax positions	0	'	0	'	'
Deferred income taxes	24,332	'	0	'	'
Deferred revenue, non-current	0	'	0	'	'
Other long-term liabilities	0	'	0	'	'
Total liabilities	420,339	'	0	'	'
Common Stock, Value, Issued	469	'	0	'	'
Additional paid-in capital	270,857	'	0	'	'
Retained Earnings (Accumulated Deficit)	-19,276	'	0	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	64	'	0	'	'
Stockholders' Equity Attributable to Parent	252,114	'	0	'	'
Stockholders' Equity Attributable to Noncontrolling Interest	'	'	0	'	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	252,114	'	0	'	'
Total liabilities and stockholdersb equity	672,453	'	0	'	'
j2 Cloud Services, Inc. [Member]	'	'	'	'	'
Cash and cash equivalents	14,799	'	34,406	50,527	76,712
Short-term investments	39,767	'	67,848	'	'
Accounts receivable, net of allowances of $3,582 and $4,105, respectively	11,213	'	11,541	'	'
Prepaid expenses and other current assets	16,237	'	16,662	'	'
Deferred income taxes	0	'	0	'	'
Due from Affiliate, Current	81,095	'	4,433	'	'
Total current assets	163,111	'	134,890	'	'
Long-term investments	7,061	'	47,351	'	'
Property and equipment, net	8,349	'	11,232	'	'
Tradenames, net	10,273	'	12,119	'	'
Patent and patent licenses, net	921	'	15,107	'	'
Customer Relationships, Net	1,049	'	6,125	'	'
Goodwill	50,803	'	86,025	'	'
Other purchased intangibles, net	4,308	'	5,306	'	'
Investments in and Advances to Affiliates, Amount of Equity	442,726	'	357,057	'	'
Other assets	1,488	'	1,576	'	'
Deferred income taxes	6,309	'	202	'	'
Total assets	696,398	'	676,990	'	'
Accounts payable and accrued expenses	23,100	'	29,419	'	'
Income taxes payable	398	'	0	'	'
Deferred revenue, current	23,312	'	23,762	'	'
Liability for Uncertain Tax Positions, Current	'	'	5,532	'	'
Deferred Tax Liabilities, Net, Current	1,365	'	906	'	'
Other current liabilities	0	'	'	'	'
Due to Affiliate, Current	0	'	0	'	'
Total current liabilities	48,175	'	59,619	'	'
Long-term Debt	246,055	'	245,670	'	'
Liability for uncertain tax positions	35,793	'	38,329	'	'
Deferred income taxes	0	'	0	'	'
Deferred revenue, non-current	8,870	'	10,753	'	'
Other long-term liabilities	881	'	989	'	'
Total liabilities	339,774	'	355,360	'	'
Common Stock, Value, Issued	0	'	461	'	'
Additional paid-in capital	231,027	'	216,871	'	'
Retained Earnings (Accumulated Deficit)	120,214	'	97,754	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	5,383	'	6,544	'	'
Stockholders' Equity Attributable to Parent	356,624	'	321,630	'	'
Stockholders' Equity Attributable to Noncontrolling Interest	'	'	0	'	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	356,624	'	321,630	'	'
Total liabilities and stockholdersb equity	696,398	'	676,990	'	'
Non-Guarantor Subsidiaries [Member]	'	'	'	'	'
Cash and cash equivalents	186,531	'	173,395	148,654	141,968
Short-term investments	5,004	'	22,941	'	'
Accounts receivable, net of allowances of $3,582 and $4,105, respectively	63,803	'	55,704	'	'
Prepaid expenses and other current assets	7,505	'	3,402	'	'
Deferred income taxes	9,081	'	3,126	'	'
Due from Affiliate, Current	0	'	0	'	'
Total current assets	271,924	'	258,568	'	'
Long-term investments	1	'	0	'	'
Property and equipment, net	30,438	'	19,968	'	'
Tradenames, net	73,920	'	70,989	'	'
Patent and patent licenses, net	25,971	'	13,423	'	'
Customer Relationships, Net	143,349	'	94,855	'	'
Goodwill	482,600	'	371,397	'	'
Other purchased intangibles, net	3,713	'	5,609	'	'
Investments in and Advances to Affiliates, Amount of Equity	8,716	'	0	'	'
Other assets	2,024	'	1,837	'	'
Deferred income taxes	3,178	'	1,643	'	'
Total assets	1,045,834	'	838,289	'	'
Accounts payable and accrued expenses	40,195	'	40,151	'	'
Income taxes payable	789	'	1,569	'	'
Deferred revenue, current	34,087	'	12,564	'	'
Liability for Uncertain Tax Positions, Current	'	'	3	'	'
Deferred Tax Liabilities, Net, Current	0	'	986	'	'
Other current liabilities	540	'	'	'	'
Due to Affiliate, Current	38,839	'	4,433	'	'
Total current liabilities	114,450	'	59,706	'	'
Long-term Debt	0	'	0	'	'
Liability for uncertain tax positions	0	'	0	'	'
Deferred income taxes	46,865	'	35,833	'	'
Deferred revenue, non-current	2,075	'	436	'	'
Other long-term liabilities	5,152	'	469	'	'
Total liabilities	168,542	'	96,444	'	'
Common Stock, Value, Issued	0	'	34	'	'
Additional paid-in capital	421,401	'	326,984	'	'
Retained Earnings (Accumulated Deficit)	464,670	'	417,136	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-8,779	'	-2,309	'	'
Stockholders' Equity Attributable to Parent	877,292	'	741,845	'	'
Stockholders' Equity Attributable to Noncontrolling Interest	'	'	0	'	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	877,292	'	741,845	'	'
Total liabilities and stockholdersb equity	1,045,834	'	838,289	'	'
Consolidation, Eliminations [Member]	'	'	'	'	'
Cash and cash equivalents	0	'	0	0	0
Short-term investments	0	'	0	'	'
Accounts receivable, net of allowances of $3,582 and $4,105, respectively	0	'	0	'	'
Prepaid expenses and other current assets	0	'	0	'	'
Deferred income taxes	-1,630	'	0	'	'
Due from Affiliate, Current	-81,095	'	-4,433	'	'
Total current assets	-82,725	'	-4,433	'	'
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	-682,469	'	-357,057	'	'
Other assets	0	'	0	'	'
Deferred income taxes	-9,487	'	0	'	'
Total assets	-774,681	'	-361,490	'	'
Accounts payable and accrued expenses	0	'	0	'	'
Income taxes payable	0	'	0	'	'
Deferred revenue, current	0	'	0	'	'
Liability for Uncertain Tax Positions, Current	'	'	0	'	'
Deferred Tax Liabilities, Net, Current	-1,630	'	0	'	'
Other current liabilities	0	'	'	'	'
Due to Affiliate, Current	-81,095	'	-4,433	'	'
Total current liabilities	-82,725	'	-4,433	'	'
Long-term Debt	0	'	0	'	'
Liability for uncertain tax positions	0	'	0	'	'
Deferred income taxes	-9,487	'	0	'	'
Deferred revenue, non-current	0	'	0	'	'
Other long-term liabilities	0	'	0	'	'
Total liabilities	-92,212	'	-4,433	'	'
Common Stock, Value, Issued	0	'	-34	'	'
Additional paid-in capital	-652,428	'	-326,983	'	'
Retained Earnings (Accumulated Deficit)	-30,041	'	-30,040	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	0	'	0	'	'
Stockholders' Equity Attributable to Parent	-682,469	'	-357,057	'	'
Stockholders' Equity Attributable to Noncontrolling Interest	'	'	0	'	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	-682,469	'	-357,057	'	'
Total liabilities and stockholdersb equity	($774,681)	'	($361,490)	'	'

Condensed_Consolidating_Financ3

Condensed Consolidating Financials Condensed Income Statement (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Total revenues	$153,018	$127,788	$431,886	$382,766
Cost of revenues	28,044	21,801	76,991	64,715
Gross Profit	124,974	105,987	354,895	318,051
Selling and Marketing Expense	37,047	34,787	105,335	99,638
Research and Development Expense	7,637	6,000	22,451	19,134
General and Administrative Expense	33,812	25,892	94,209	74,377
Operating Expenses	78,496	66,679	221,995	193,149
Income (loss) from operations	46,478	39,308	132,900	124,902
Interest expense (income), net	10,123	4,972	20,753	14,709
Other expense (income), net	251	-396	-254	-600
Income (loss) before income taxes	36,104	34,732	112,401	110,793
Income Tax Expense (Benefit)	7,345	7,105	19,828	24,428
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	28,759	27,627	92,573	86,365
Net Income (Loss) Attributable to Parent	28,759	27,806	92,573	86,768
Net Income (Loss) Attributable to Noncontrolling Interest	0	-179	0	-403
j2 Global, Inc. [Member]	'	'	'	'
Total revenues	0	0	0	0
Cost of revenues	0	0	0	0
Gross Profit	0	0	0	0
Selling and Marketing Expense	0	0	0	0
Research and Development Expense	0	0	0	0
General and Administrative Expense	3,063	0	3,463	0
Operating Expenses	3,063	0	3,463	0
Income (loss) from operations	-3,063	0	-3,463	0
Interest expense (income), net	5,136	0	5,786	0
Other expense (income), net	-2	0	-2	0
Income (loss) before income taxes	-8,197	0	-9,247	0
Income Tax Expense (Benefit)	-3,158	0	-3,537	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	-5,039	0	-5,710	0
Net Income (Loss) Attributable to Parent	'	0	'	0
Net Income (Loss) Attributable to Noncontrolling Interest	'	0	'	0
j2 Cloud Services, Inc. [Member]	'	'	'	'
Total revenues	52,960	70,126	169,467	199,696
Cost of revenues	-3,275	21,378	35,729	63,286
Gross Profit	56,235	48,748	133,738	136,410
Selling and Marketing Expense	9,168	10,577	27,148	31,849
Research and Development Expense	3,320	3,323	10,411	9,375
General and Administrative Expense	6,789	9,238	24,004	27,693
Operating Expenses	19,277	23,138	61,563	68,917
Income (loss) from operations	36,958	25,610	72,175	67,493
Interest expense (income), net	5,116	2,263	15,314	7,496
Other expense (income), net	78	-67	6	-166
Income (loss) before income taxes	31,764	23,414	56,855	60,163
Income Tax Expense (Benefit)	3,458	3,101	4,783	17,478
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	28,306	20,313	52,072	42,685
Net Income (Loss) Attributable to Parent	'	20,313	'	42,685
Net Income (Loss) Attributable to Noncontrolling Interest	'	0	'	0
Non-Guarantor Subsidiaries [Member]	'	'	'	'
Total revenues	90,854	71,865	293,530	228,681
Cost of revenues	22,060	14,501	72,191	46,701
Gross Profit	68,794	57,364	221,339	181,980
Selling and Marketing Expense	27,934	24,335	78,369	68,128
Research and Development Expense	4,317	2,677	12,040	9,759
General and Administrative Expense	23,960	16,654	66,742	46,684
Operating Expenses	56,211	43,666	157,151	124,571
Income (loss) from operations	12,583	13,698	64,188	57,409
Interest expense (income), net	-129	2,709	-347	7,213
Other expense (income), net	175	-329	-258	-434
Income (loss) before income taxes	12,537	11,318	64,793	50,630
Income Tax Expense (Benefit)	7,045	4,004	18,582	6,950
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	5,492	7,314	46,211	43,680
Net Income (Loss) Attributable to Parent	'	7,314	'	43,680
Net Income (Loss) Attributable to Noncontrolling Interest	'	0	'	0
Consolidation, Eliminations [Member]	'	'	'	'
Total revenues	9,204	-14,203	-31,111	-45,611
Cost of revenues	9,259	-14,078	-30,929	-45,272
Gross Profit	-55	-125	-182	-339
Selling and Marketing Expense	-55	-125	-182	-339
Research and Development Expense	0	0	0	0
General and Administrative Expense	0	0	0	0
Operating Expenses	-55	-125	-182	-339
Income (loss) from operations	0	0	0	0
Interest expense (income), net	0	0	0	0
Other expense (income), net	0	0	0	0
Income (loss) before income taxes	0	0	0	0
Income Tax Expense (Benefit)	0	0	0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	0	0	0	0
Net Income (Loss) Attributable to Parent	'	179	'	403
Net Income (Loss) Attributable to Noncontrolling Interest	'	($179)	'	($403)

Condensed_Consolidating_Financ4

Condensed Consolidating Financials Condensed Comprehensive Income Statement (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other Comprehensive (Income) Loss, Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	$0	($13)	$0	($35)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	28,759	27,627	92,573	86,365
Net Income (Loss) Attributable to Noncontrolling Interest	0	-179	0	-403
Foreign currency translation adjustment, net of tax (benefit)	-6,977	1,590	-4,806	-526
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	-3,006	4,259	-2,761	9,260
Other Comprehensive Income (Loss), Net of Tax	-9,983	5,849	-7,567	8,734
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	18,776	33,476	85,006	95,099
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	18,776	33,668	85,006	95,537
j2 Global, Inc. [Member]	'	'	'	'
Other Comprehensive (Income) Loss, Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	'	0	'	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	-5,039	0	-5,710	0
Net Income (Loss) Attributable to Noncontrolling Interest	'	0	'	0
Foreign currency translation adjustment, net of tax (benefit)	0	0	0	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	64	0	64	0
Other Comprehensive Income (Loss), Net of Tax	64	0	64	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	'	0	'	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	-4,975	0	-5,646	0
j2 Cloud Services, Inc. [Member]	'	'	'	'
Other Comprehensive (Income) Loss, Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	'	0	'	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	28,306	20,313	52,072	42,685
Net Income (Loss) Attributable to Noncontrolling Interest	'	0	'	0
Foreign currency translation adjustment, net of tax (benefit)	2,300	-586	1,644	-159
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	-3,068	4,247	-2,834	5,767
Other Comprehensive Income (Loss), Net of Tax	-768	3,661	-1,190	5,608
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	'	23,974	'	48,293
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	27,538	23,974	50,882	48,293
Non-Guarantor Subsidiaries [Member]	'	'	'	'
Other Comprehensive (Income) Loss, Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	'	-13	'	-35
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	5,492	7,314	46,211	43,680
Net Income (Loss) Attributable to Noncontrolling Interest	'	0	'	0
Foreign currency translation adjustment, net of tax (benefit)	-9,277	2,176	-6,450	-367
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	-2	12	9	3,493
Other Comprehensive Income (Loss), Net of Tax	-9,279	2,188	-6,441	3,126
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	'	9,502	'	46,806
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	-3,787	9,515	39,770	46,841
Consolidation, Eliminations [Member]	'	'	'	'
Other Comprehensive (Income) Loss, Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	'	0	'	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	0	0	0	0
Net Income (Loss) Attributable to Noncontrolling Interest	'	-179	'	-403
Foreign currency translation adjustment, net of tax (benefit)	0	0	0	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	'	0	'	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$0	$179	$0	$403

Condensed_Consolidating_Financ5

Condensed Consolidating Financials Condensed Statement of Cash Flows (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$92,573,000	$86,365,000
Depreciation and amortization	43,307,000	28,424,000
Accretion (Amortization) of Discounts and Premiums, Investments	983,000	1,323,000
Amortization of financing costs and discounts	2,828,000	456,000
Share-based Compensation	6,538,000	7,108,000
Excess Tax Benefit from Share-based Compensation, Operating Activities	-6,728,000	-3,171,000
Provision for doubtful accounts	3,278,000	2,565,000
Deferred income taxes	-2,954,000	472,000
(Gain) loss on sale of available-for-sale investments	-69,000	103,000
Increase (Decrease) in Accounts Receivable	1,267,000	-7,495,000
Increase (Decrease) in Prepaid Expense and Other Assets	-4,124,000	945,000
Increase (Decrease) in Other Operating Assets	-128,000	182,000
Accounts payable and accrued expenses	-2,949,000	4,035,000
Income taxes payable	7,565,000	-3,286,000
Deferred revenue	-815,000	13,049,000
Liability for uncertain tax positions	-8,071,000	3,867,000
Other	-380,000	-62,000
Net Cash Provided by (Used in) Operating Activities	132,121,000	134,880,000
Maturity of certificates of deposit	14,520,000	42,615,000
Payments to Acquire Other Investments	0	-22,071,000
Sales of available-for-sale investments	60,456,000	82,889,000
Payments to Acquire Available-for-sale Securities	-112,983,000	-139,955,000
Payments to Acquire Property, Plant, and Equipment	-7,755,000	-11,116,000
Proceeds from sale of assets	608,000	1,000
Payments to Acquire Businesses, Net of Cash Acquired	-118,238,000	-81,566,000
Payments to Acquire Intangible Assets	-4,806,000	-2,784,000
Payments to Acquire Interest in Subsidiaries and Affiliates	0	0
Payments for (Proceeds from) Other Investing Activities	'	0
Net Cash Provided by (Used in) Investing Activities	-168,198,000	-131,987,000
Proceeds from Issuance of Long-term Debt	402,500,000	0
Debt issuance costs	-11,527,000	-47,000
Payments for Repurchase of Common Stock	-5,473,000	-4,513,000
Issuance of common stock under employee stock purchase plan	199,000	161,000
Exercise of stock options	6,441,000	13,515,000
Payments of Dividends	-38,547,000	-33,267,000
Excess tax benefits from share-based compensation	6,728,000	3,171,000
Deferred payments for acquisitions	-14,316,000	0
Proceeds from (Payments for) Other Financing Activities	-765,000	-171,000
Payments of Distributions to Affiliates	0	0
Net Cash Provided by (Used in) Financing Activities	345,240,000	-21,151,000
Effect of exchange rate changes on cash and cash equivalents	-1,967,000	-1,241,000
Cash and Cash Equivalents, Period Increase (Decrease)	307,196,000	-19,499,000
Cash and cash equivalents	514,997,000	'
j2 Global, Inc. [Member]	'	'
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	-5,710,000	0
Depreciation and amortization	0	0
Accretion (Amortization) of Discounts and Premiums, Investments	142,000	0
Amortization of financing costs and discounts	2,266,000	0
Share-based Compensation	2,191,000	0
Excess Tax Benefit from Share-based Compensation, Operating Activities	-1,925,000	0
Provision for doubtful accounts	0	0
Deferred income taxes	4,614,000	0
(Gain) loss on sale of available-for-sale investments	-2,000	'
Increase (Decrease) in Accounts Receivable	0	0
Increase (Decrease) in Prepaid Expense and Other Assets	-1,075,000	0
Increase (Decrease) in Other Operating Assets	-896,000	0
Accounts payable and accrued expenses	9,915,000	0
Income taxes payable	1,734,000	0
Deferred revenue	0	0
Liability for uncertain tax positions	0	0
Other	0	0
Net Cash Provided by (Used in) Operating Activities	11,254,000	0
Maturity of certificates of deposit	0	0
Payments to Acquire Other Investments	0	0
Sales of available-for-sale investments	2,005,000	0
Payments to Acquire Available-for-sale Securities	-58,591,000	0
Payments to Acquire Property, Plant, and Equipment	0	0
Proceeds from sale of assets	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
Payments for (Proceeds from) Other Investing Activities	'	0
Net Cash Provided by (Used in) Investing Activities	-56,586,000	0
Proceeds from Issuance of Long-term Debt	402,500,000	'
Debt issuance costs	-12,069,000	0
Payments for Repurchase of Common Stock	-739,000	0
Issuance of common stock under employee stock purchase plan	76,000	0
Exercise of stock options	1,193,000	0
Payments of Dividends	-13,267,000	0
Excess tax benefits from share-based compensation	1,925,000	0
Deferred payments for acquisitions	0	'
Proceeds from (Payments for) Other Financing Activities	0	0
Payments of Distributions to Affiliates	-20,620,000	0
Net Cash Provided by (Used in) Financing Activities	358,999,000	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	313,667,000	0
Cash and cash equivalents	313,667,000	'
j2 Cloud Services, Inc. [Member]	'	'
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	52,072,000	42,685,000
Depreciation and amortization	4,950,000	6,659,000
Accretion (Amortization) of Discounts and Premiums, Investments	677,000	948,000
Amortization of financing costs and discounts	562,000	456,000
Share-based Compensation	4,514,000	7,108,000
Excess Tax Benefit from Share-based Compensation, Operating Activities	-4,802,000	-3,171,000
Provision for doubtful accounts	1,395,000	1,016,000
Deferred income taxes	-2,657,000	451,000
(Gain) loss on sale of available-for-sale investments	-18,000	'
Increase (Decrease) in Accounts Receivable	-1,894,000	-1,514,000
Increase (Decrease) in Prepaid Expense and Other Assets	-2,197,000	1,227,000
Increase (Decrease) in Other Operating Assets	-83,000	-7,000
Accounts payable and accrued expenses	-4,119,000	-9,583,000
Income taxes payable	2,822,000	-1,235,000
Deferred revenue	-942,000	14,331,000
Liability for uncertain tax positions	-8,069,000	3,865,000
Other	-108,000	-44,000
Net Cash Provided by (Used in) Operating Activities	42,103,000	63,192,000
Maturity of certificates of deposit	8,210,000	30,270,000
Payments to Acquire Other Investments	0	-16,375,000
Sales of available-for-sale investments	46,863,000	72,384,000
Payments to Acquire Available-for-sale Securities	-54,393,000	-119,049,000
Payments to Acquire Property, Plant, and Equipment	-925,000	-4,134,000
Proceeds from sale of assets	0	1,000
Payments to Acquire Businesses, Net of Cash Acquired	0	-2,305,000
Payments to Acquire Intangible Assets	-2,871,000	-1,828,000
Payments to Acquire Interest in Subsidiaries and Affiliates	-23,822,000	-12,498,000
Payments for (Proceeds from) Other Investing Activities	'	3,281,000
Net Cash Provided by (Used in) Investing Activities	-26,938,000	-50,253,000
Proceeds from Issuance of Long-term Debt	0	'
Debt issuance costs	0	-47,000
Payments for Repurchase of Common Stock	-4,733,000	-4,514,000
Issuance of common stock under employee stock purchase plan	123,000	161,000
Exercise of stock options	5,248,000	13,515,000
Payments of Dividends	-25,302,000	-33,267,000
Excess tax benefits from share-based compensation	4,803,000	3,171,000
Deferred payments for acquisitions	0	'
Proceeds from (Payments for) Other Financing Activities	-54,000	0
Payments of Distributions to Affiliates	-14,861,000	-18,120,000
Net Cash Provided by (Used in) Financing Activities	-34,776,000	-39,101,000
Effect of exchange rate changes on cash and cash equivalents	4,000	-23,000
Cash and Cash Equivalents, Period Increase (Decrease)	-19,607,000	-26,185,000
Cash and cash equivalents	14,799,000	'
Non-Guarantor Subsidiaries [Member]	'	'
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	46,211,000	43,680,000
Depreciation and amortization	38,357,000	21,765,000
Accretion (Amortization) of Discounts and Premiums, Investments	164,000	375,000
Amortization of financing costs and discounts	0	0
Share-based Compensation	-167,000	0
Excess Tax Benefit from Share-based Compensation, Operating Activities	-1,000	0
Provision for doubtful accounts	1,883,000	1,549,000
Deferred income taxes	-4,911,000	21,000
(Gain) loss on sale of available-for-sale investments	-49,000	'
Increase (Decrease) in Accounts Receivable	3,161,000	-5,981,000
Increase (Decrease) in Prepaid Expense and Other Assets	-852,000	-282,000
Increase (Decrease) in Other Operating Assets	851,000	189,000
Accounts payable and accrued expenses	-8,745,000	13,618,000
Income taxes payable	3,009,000	-2,051,000
Deferred revenue	127,000	-1,282,000
Liability for uncertain tax positions	-2,000	2,000
Other	-272,000	-18,000
Net Cash Provided by (Used in) Operating Activities	78,764,000	71,688,000
Maturity of certificates of deposit	6,310,000	12,345,000
Payments to Acquire Other Investments	0	-5,696,000
Sales of available-for-sale investments	11,588,000	10,505,000
Payments to Acquire Available-for-sale Securities	1,000	-20,906,000
Payments to Acquire Property, Plant, and Equipment	-6,830,000	-6,982,000
Proceeds from sale of assets	608,000	0
Payments to Acquire Businesses, Net of Cash Acquired	-118,238,000	-79,261,000
Payments to Acquire Intangible Assets	-1,935,000	-956,000
Payments to Acquire Interest in Subsidiaries and Affiliates	0	0
Payments for (Proceeds from) Other Investing Activities	'	-3,281,000
Net Cash Provided by (Used in) Investing Activities	-108,496,000	-94,232,000
Proceeds from Issuance of Long-term Debt	0	'
Debt issuance costs	542,000	0
Payments for Repurchase of Common Stock	-1,000	1,000
Issuance of common stock under employee stock purchase plan	0	0
Exercise of stock options	0	0
Payments of Dividends	22,000	0
Excess tax benefits from share-based compensation	0	0
Deferred payments for acquisitions	-14,316,000	'
Proceeds from (Payments for) Other Financing Activities	-711,000	-171,000
Payments of Distributions to Affiliates	59,303,000	30,618,000
Net Cash Provided by (Used in) Financing Activities	44,839,000	30,448,000
Effect of exchange rate changes on cash and cash equivalents	-1,971,000	-1,218,000
Cash and Cash Equivalents, Period Increase (Decrease)	13,136,000	6,686,000
Cash and cash equivalents	186,531,000	'
Consolidation, Eliminations [Member]	'	'
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	0	0
Depreciation and amortization	0	0
Accretion (Amortization) of Discounts and Premiums, Investments	0	0
Amortization of financing costs and discounts	0	0
Share-based Compensation	0	0
Excess Tax Benefit from Share-based Compensation, Operating Activities	0	0
Provision for doubtful accounts	0	0
Deferred income taxes	0	0
(Gain) loss on sale of available-for-sale investments	0	'
Increase (Decrease) in Accounts Receivable	0	0
Increase (Decrease) in Prepaid Expense and Other Assets	0	0
Increase (Decrease) in Other Operating Assets	0	0
Accounts payable and accrued expenses	0	0
Income taxes payable	0	0
Deferred revenue	0	0
Liability for uncertain tax positions	0	0
Other	0	0
Net Cash Provided by (Used in) Operating Activities	0	0
Maturity of certificates of deposit	0	0
Payments to Acquire Other Investments	0	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
Proceeds from sale of assets	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	23,822,000	12,498,000
Payments for (Proceeds from) Other Investing Activities	'	0
Net Cash Provided by (Used in) Investing Activities	23,822,000	12,498,000
Proceeds from Issuance of Long-term Debt	0	'
Debt issuance costs	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	'
Proceeds from (Payments for) Other Financing Activities	0	0
Payments of Distributions to Affiliates	-23,822,000	-12,498,000
Net Cash Provided by (Used in) Financing Activities	-23,822,000	-12,498,000
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	'

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	0 Months Ended
	Oct. 30, 2014	Aug. 05, 2014	7-May-14	Feb. 12, 2014
Subsequent Events [Abstract]	'	'	'	'
Dividends declared date	30-Oct-14	5-Aug-14	7-May-14	11-Feb-14
Dividend amount to be paid, per common share	$0.28	$0.28	$0.27	$0.26
Date dividend is payable	4-Dec-14	2-Sep-14	3-Jun-14	10-Mar-14
Date shareholders must be on record for dividend	17-Nov-14	18-Aug-14	19-May-14	24-Feb-14