Ziff Davis (ZD) 10-K 2 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document (USD $)	12 Months Ended
	Dec. 31, 2014	Feb. 20, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Entity Registrant Name	J2 GLOBAL, INC.
Entity Central Index Key	1084048
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		48,239,238
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$1,201,977,991

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$433,663,000	$207,801,000
Short-term investments	96,206,000	90,789,000
Accounts receivable, net of allowances of $3,685 and $4,105, respectively	91,699,000	67,245,000
Prepaid expenses and other current assets	22,602,000	20,064,000
Deferred income taxes	2,013,000	3,126,000
Total current assets	646,183,000	389,025,000
Long-term investments	60,508,000	47,351,000
Property and equipment, net	38,217,000	31,200,000
Tradenames, net	105,551,000	83,108,000
Patent and patent licenses, net	24,927,000	28,530,000
Customer relationships, net	163,766,000	100,980,000
Goodwill	635,675,000	457,422,000
Other purchased intangibles, net	17,556,000	10,915,000
Deferred income taxes	0	1,845,000
Other assets	12,819,000	3,413,000
Total assets	1,705,202,000	1,153,789,000
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	95,310,000	69,570,000
Income taxes payable	0	1,569,000
Deferred revenue	63,457,000	36,326,000
Capital Lease Obligations, Current	258,000	0
Liability for uncertain tax positions	0	5,535,000
Deferred income taxes	342,000	1,892,000
Total current liabilities	159,367,000	114,892,000
Total long-term debt, less current portion	593,350,000
Long-term Debt	593,350,000	245,670,000
Capital Lease Obligations, Noncurrent	141,000	0
Liability for uncertain tax positions	37,551,000	38,329,000
Deferred income taxes	61,960,000	35,833,000
Deferred Revenue, Noncurrent	10,182,000	11,189,000
Other long-term liabilities	22,416,000	1,458,000
Total liabilities	884,967,000	447,371,000
Commitments and contingencies	0	0
Preferred stock, $0.01 par value	5,064,000
Common stock, $0.01 par value. Authorized 95,000,000 at December 31, 2014 and 2013; total issued and outstanding 48,223,563 and 46,105,076 shares at December 31, 2014 and 2013, respectively.	474,000	461,000
Additional paid-in capital	273,304,000	216,872,000
Retained earnings	553,584,000	484,850,000
Accumulated other comprehensive loss	-7,127,000	4,235,000
Stockholders' equity attributable to j2 Global, Inc.	820,235,000	706,418,000
Stockholders' Equity Attributable to Noncontrolling Interest	0	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	820,235,000	706,418,000
Total liabilities and stockholders' equity	1,705,202,000	1,153,789,000
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

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) Statement (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Allowance for Doubtful Accounts Receivable, Current	$3,685	$4,105
Common Stock, Par or Stated Value Per Share	$0.01	$0.01
Common Stock, Shares Authorized	95,000,000	95,000,000
Common Stock, Shares, Issued	47,409,514	46,105,076
Common Stock, Shares, Outstanding	47,409,514	46,105,076
Preferred Stock, Par or Stated Value Per Share	$0.01	$0.01
Treasury Stock, Shares	0	0
Series A Preferred Stock [Member]
Preferred Stock, Shares Authorized	6,000	6,000
Preferred Stock, Shares Issued	0	5,064
Preferred Stock, Shares Outstanding	0	5,064
Series B Preferred Stock [Member]
Preferred Stock, Shares Authorized	20,000	20,000
Preferred Stock, Shares Issued	0	4,155
Preferred Stock, Shares Outstanding	0	4,155

Consolidated_Statements_Of_Inc

Consolidated Statements Of Income (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Revenues	$599,030	$520,801	$371,396
Cost of revenues (including share-based compensation of $345, $756 and $844 in 2014, 2013 and 2012, respectively)	105,989	86,893	67,013
Gross profit	493,041	433,908	304,383
Operating expenses:
Sales and marketing (including share-based compensation of $1,944, $1,855 and $1,543 in 2014, 2013 and 2012, respectively)	141,967	131,317	62,825
Research, development and engineering (including share-based compensation of $721, $434 and $459 in 2014, 2013 and 2012, respectively)	30,680	25,485	18,624
General and administrative (including share-based compensation of $5,898, $6,675, $6,286 in 2014, 2013 and 2012, respectively)	134,188	101,683	60,772
Total operating expenses	306,835	258,485	142,221
Operating earnings	186,206	175,423	162,162
Interest expense (income), net	31,204	21,254	7,650
Other expense (income), net	-165	11,472	-410
Income before income taxes	155,167	142,697	154,922
Income tax expense	29,840	35,175	33,259
Net earnings attributable to j2 Global, Inc. common shareholders	124,336	107,522	121,580
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	125,327	107,522	121,663
Net Income (Loss) Attributable to Noncontrolling Interest	0	0	83
Preferred Stock Redemption Premium	($991)	$0	$0
Net earnings per common share:
Basic	$2.60	$2.31	$2.63
Diluted	$2.58	$2.28	$2.61
Weighted average shares outstanding:
Basic	46,778,015	45,548,767	45,459,712
Diluted	47,106,538	46,140,019	45,781,658
Cash dividends paid per common share	$1.10	$0.98	$0.87

Recovered_Sheet1

Consolidated Statements of Income (Parenthetical) Statement (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allocated Share-based Compensation Expense	$8,908	$9,720	$9,132
Cost of Sales [Member]
Allocated Share-based Compensation Expense	345	756	844
Selling and Marketing Expense [Member]
Allocated Share-based Compensation Expense	1,944	1,855	1,543
Research and Development Expense [Member]
Allocated Share-based Compensation Expense	721	434	459
General and Administrative Expense [Member]
Allocated Share-based Compensation Expense	$5,898	$6,675	$6,286

Consolidated_Statement_Of_Comp

Consolidated Statement Of Comprehensive Income (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$32,754	$28,759	$35,049	$28,765	$20,754	$27,806	$36,040	$22,922	$125,327	$107,522	$121,663
Foreign currency translation adjustment, net of tax (benefit) of zero, ($122) and $196 for the year ended 2014, 2013 and 2012, respectively									-14,694	78	1,435
Unrealized gain on available-for-sale investments, net of tax (benefit) of $2,757, $2,447 and $646 for the year ended 2014, 2013 and 2012, respectively									3,332	4,245	1,954
Other Comprehensive Income, net of tax									-11,362	4,323	3,389
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									113,965	111,845	125,052
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	83
Comprehensive income attributable to j2 Global, Inc.									$113,965	$111,845	$124,969

Recovered_Sheet2

Consolidated Statement of Comprehensive Income (Parenthetical) Statement (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$0	($122)	$196
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	$2,757	$2,447	$646

Consolidated_Statement_Of_Cash

Consolidated Statement Of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$125,327	$107,522	$121,663
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	62,953	39,788	22,164
Amortization of discount or premium of investments	-1,334	-1,796	-1,603
Amortization of financing costs and discounts	5,045	613	249
Share-based compensation	8,908	9,720	9,132
Excess tax benefits from share-based compensation	5,512	2,695	961
Provision for doubtful accounts	4,702	3,135	4,289
Deferred income taxes	-10,033	250	1,150
Loss on disposal of fixed assets	0	8	54
(Gain) loss on available-for-sale investments	-90	66	-266
Loss on extinguishment of debt and related interest expense	0	14,437	0
Decrease (increase) in:
Accounts receivable	11,078	9,588	5,417
Prepaid expenses and other current assets	3,212	-149	2,028
Other assets	42	-168	243
(Decrease) increase in:
Accounts payable and accrued expenses	-5,447	9,126	5,138
Income taxes payable	10,797	667	4,139
Deferred revenue	-711	12,368	1,612
Liability for uncertain tax positions	-6,313	6,186	7,601
Other	603	-392	32
Net cash provided by operating activities	177,231	193,324	169,911
Cash flows from investing activities:
Maturity of certificates of deposit	14,520	42,615	8,000
Purchase of certificates of deposit	-65	-22,071	-34,673
Sales of available-for-sale investments	110,363	140,126	138,709
Purchase of available-for-sale investments	-138,452	-168,901	-151,989
Purchases of property and equipment	-11,829	-18,627	-5,061
Proceeds from sale of assets	608	1	156
Acquisition of businesses, net of cash received	-245,278	-126,341	-198,341
Purchases of intangible assets	-5,336	-14,200	-6,295
Net cash used in investing activities	-275,469	-167,398	-249,494
Cash flows from financing activities:
Issuance of long-term debt	402,500	0	245,000
Debt issuance costs	-11,991	-47	-1,384
Repurchases of common stock and restricted stock	-5,663	-4,587	-60,282
Issuance of common stock under employee stock purchase plan	265	213	157
Exercise of stock options	6,621	13,604	5,646
Proceeds from noncontrolling interests	0	0	8,557
Dividends paid	-52,269	-45,134	-40,263
Excess tax benefits from share-based compensation	5,512	2,695	961
PaymentsOfDeferredConsiderationRelatedToAcquisition	-16,512	0	0
Proceeds from (Payments for) Other Financing Activities	-933	-2,437	0
Net cash (used in) provided by financing activities	327,530	-35,693	158,392
Effect of exchange rate changes on cash and cash equivalents	-3,430	-1,112	512
Net change in cash and cash equivalents	225,862	-10,879	79,321
Cash and cash equivalents	433,663	207,801	218,680
Cash and cash equivalents at end of period	$433,663	$207,801	$218,680

Consolidated_Statements_Of_Sto

Consolidated Statements Of Stockholders' Equity Statement (USD $)	3 Months Ended		12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stockholders' equity attributable to j2 Global, Inc.	$820,235	$706,418	$820,235	$706,418		$554,375
Stockholders' Equity Attributable to Noncontrolling Interest	0	0	0	0		0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	820,235	706,418	820,235	706,418		554,375
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	32,754	20,754	125,327	107,522	121,663
Net earnings attributable to j2 Global, Inc. common shareholders	31,763	20,754	124,336	107,522	121,580
Net Income (Loss) Attributable to Noncontrolling Interest			0	0	83
Comprehensive income attributable to j2 Global, Inc.			113,965	111,845	124,969
Preferred Stock, Accretion of Redemption Discount			0	0	-183
Stock Repurchased					2,100,000
Preferred Stock Redemption Premium			991	0	0
Additional paid-in capital	273,304	216,872	273,304	216,872
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests				100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			-433,008	-569,204	-357,234
Common Stock [Member]
Shares, Outstanding	47,409,514	46,105,076	47,409,514	46,105,076		55,389,636
Stockholders' equity attributable to j2 Global, Inc.	474	461	474	461		554
Stock Issued During Period, Shares, New Issues				234,025
Stock Issued During Period, Value, New Issues				2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			433,008	569,204	357,234
Stock Issued During Period, Value, Stock Options Exercised			4	6	4
Stock Issued During Period, Shares, Employee Stock Purchase Plans			5,735	5,402	5,797
Stock Issued During Period, Value, Employee Stock Purchase Plan			0	0	0
Stock Issued During Period, Shares, Restricted Stock Award, Gross			565,713	308,082	204,052
Stock Issued During Period, Value, Restricted Stock Award, Gross			6	3	2
Common Shares Repurchased And Retired During Period Shares			-113,256	-29,950	-10,806,648
Common Shares Repurchased And Retired During Period Value			-1	0	-108
Stock Repurchased and Retired During Period, Shares				-75,878	-55,880
Stock Repurchased and Retired During Period, Value				-1	-1
Series A Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues				5,064
Stock Issued During Period, Value, New Issues				0
Stock Repurchased			-5,064
Adjustments to Additional Paid in Capital, Other			-4,774
Additional Paid in Capital, Preferred Stock		4,774		4,774
Series B Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues				4,155
Stock Issued During Period, Value, New Issues				0
Stock Repurchased			-4,155
Adjustments to Additional Paid in Capital, Other			-6,575
Additional Paid in Capital, Preferred Stock		6,575		6,575
Additional Paid-in Capital [Member]
Stockholders' equity attributable to j2 Global, Inc.	273,304	216,872	273,304	216,872		197,374
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests				22,900
Stock Issued During Period, Value, Stock Options Exercised			6,617	13,598
Stock Issued During Period, Value, Employee Stock Purchase Plan			265	213
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt			36,478
Stock Issued During Period, Value, Restricted Stock Award, Gross			-6	-3
Common Shares Repurchased And Retired During Period Value			-2,245	-684
Stock Repurchased and Retired During Period, Value				-1,506
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			8,824	9,585
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			5,512	3,227
Treasury Stock [Member]
Shares, Outstanding	0	0	0	0		-8,680,568
Stockholders' equity attributable to j2 Global, Inc.	0	0	0	0		-112,671
Common Shares Repurchased And Retired During Period Shares					8,680,568
Common Shares Repurchased And Retired During Period Value					112,671
Retained Earnings [Member]
Stockholders' equity attributable to j2 Global, Inc.	553,584	484,850	553,584	484,850		472,595
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			125,327
Net earnings attributable to j2 Global, Inc. common shareholders				107,522	121,580
Dividends, Common Stock, Cash			-52,269	-45,135
Preferred Stock Redemption Premium			-991
Common Shares Repurchased And Retired During Period Value			-3,417	-2,395	-129,171
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			84	68
Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' equity attributable to j2 Global, Inc.	-7,127	4,235	-7,127	4,235		-3,477
Comprehensive income attributable to j2 Global, Inc.			-11,362	4,323	3,389
Extinguishment of Series A Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues			235,665
Stock Issued During Period, Value, New Issues			2
Exchange of Series B Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues			177,573
Stock Issued During Period, Value, New Issues			$2

The_Company

The Company	12 Months Ended
	Dec. 31, 2014
The Company [Abstract]
Nature of Operations [Text Block]	The Company
	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 specializes in the technology and gaming markets, reaching in-market buyers and influencers in both the consumer and business-to-business space.

Basis_Of_Presentation

Basis Of Presentation	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies [Text Block]	Basis of Presentation and Summary of Significant Accounting Policies
	(a)	Principles of Consolidation
	The accompanying consolidated financial statements include the accounts of j2 Global and its direct and indirect wholly-owned and less-than-wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
	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.
	(b)	Use of Estimates
	The preparation of consolidated financial statements in accordance with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements, including judgments about investment classifications, and the reported amounts of net revenue and expenses during the reporting period. We believe that our most significant estimates are those related to valuation and impairment of marketable securities, valuation of assets acquired and liabilities assumed in connection with business combinations, long-lived and intangible asset impairment, contingent consideration, income taxes and contingencies and allowance for doubtful accounts. On an ongoing basis, management evaluates its estimates based on historical experience and on various other factors that the Company believes to be reasonable under the circumstances. Actual results could materially differ from those estimates.
	(c)	Allowances for Doubtful Accounts
	j2 Global reserves for receivables it may not be able to collect. These reserves for the Company's Business Cloud Services are typically driven by the volume of credit card declines and past due invoices and are based on historical experience as well as an evaluation of current market conditions. These reserves for the Company's Digital Media segment are typically driven by past due invoices and are based on historical experience. On an ongoing basis, management evaluates the adequacy of these reserves.
	(d)	Revenue Recognition
	Business Cloud Services
	The Company's Business Cloud Services revenues substantially consist of monthly recurring subscription and usage-based fees, which are primarily paid in advance by credit card. In accordance with GAAP, the Company recognizes revenue when persuasive evidence of an arrangement exists, services have been provided, the sales price is fixed and determinable and collection is probable. The Company defers the portions of monthly, quarterly, semi-annually and annually recurring subscription and usage-based fees collected in advance and recognizes them in the period earned. Additionally, the Company defers and recognizes subscriber activation fees and related direct incremental costs over a subscriber's estimated useful life.
	j2 Global's Business Cloud Services also include patent license revenues generated under license agreements that provide for the payment of contractually determined fully paid-up or royalty-bearing license fees to j2 Global in exchange for the grant of non-exclusive, retroactive and future licenses to our intellectual property, including patented technology. Patent revenues may also consist of revenues generated from the sale of patents. Patent license revenues are recognized when earned over the term of the license agreements. With regard to fully paid-up license arrangements, the Company recognizes as revenue in the period the license agreement is executed the portion of the payment attributable to past use of the intellectual property and amortizes the remaining portion of such payments on a straight-line basis, or pro-rata revenue basis, as appropriate over the life of the licensed patent(s). With regard to royalty-bearing license arrangements, the Company recognizes revenues of license fees earned during the applicable period. With regard to patent sales, the Company recognizes as revenue in the period of the sale the amount of the purchase price over the carrying value of the patent(s) sold.
	The Business Cloud Services business also generates revenues by licensing certain technology to third parties. These licensing revenues are recognized when earned in accordance with the terms of the underlying agreement. Generally, revenue is recognized as the third party uses the licensed technology over the period.
	Digital Media
	The Company's Digital Media revenues primarily consist of revenues generated from the sale of advertising campaigns that are targeted to the Company's proprietary websites and to those websites operated by third parties that are part of the Digital Media business's advertising network. Revenues for these advertising campaigns are recognized as earned either when an ad is placed for viewing by a visitor to the appropriate web page or when the visitor "clicks through" on the ad, depending upon the terms with the individual advertiser.
	Revenues for Digital Media business-to-business operations consist of lead-generation campaigns for IT vendors and are recognized as earned when the Company delivers the qualified leads to the customer.
	j2 Global also generates Digital Media revenues through the license of certain assets to clients, for the clients' use in their own promotional materials or otherwise. Such assets may include logos, editorial reviews, or other copyrighted material. Revenues under such license agreements are recognized when the assets are delivered to the client. Also, Digital Media revenues are generated through the license of certain speed testing technology which is recognized when delivered to the client through providing data services primarily to Internet Service Providers ("ISPs") and wireless carriers which is recognized as earned over the term of the access period. The Digital Media business also generates other types of revenues, including business listing fees, subscriptions to online publications, and from other sources. Such other revenues are recognized as earned.
	(e)	Fair Value Measurements
	j2 Global complies with the provisions of Financial Accounting Standards Board (“FASB”) ASC Topic No. 820, Fair Value Measurements and Disclosures (“ASC 820”), in measuring fair value and in disclosing fair value measurements. ASC 820 provides a framework for measuring fair value and expands the disclosures required for fair value measurements of financial and non-financial assets and liabilities.
	As of December 31, 2014, the carrying value of cash and cash equivalents, short-term investments, accounts receivable, interest receivable, accounts payable, accrued expenses, interest payable, customer deposits and long-term debt are reflected in the financial statements at cost. With the exception of long-term debt, cost approximates fair value due to the short-term nature of such instruments. The fair value of the Company's outstanding debt was determined using the quoted market prices of debt instruments with similar terms and maturities, if available. As of the same dates, the carrying value of other long-term liabilities approximated fair value as the related interest rates approximate rates currently available to j2 Global.
	(f)	Cash and Cash Equivalents
	j2 Global considers cash equivalents to be only those investments that are highly liquid, readily convertible to cash and with maturities of three months or less at the purchase date.
	(g)	Investments
	j2 Global accounts for its investments in debt and equity securities in accordance with FASB ASC Topic No. 320, Investments - Debt and Equity Securities (“ASC 320”). Debt investments are typically comprised of corporate and governmental debt securities. Equity securities recorded as available-for-sale represent strategic equity investments. j2 Global determines the appropriate classification of its investments at the time of acquisition and evaluates such determination at each balance sheet date. Held-to-maturity securities are those investments which the Company has the ability and intent to hold until maturity and are recorded at amortized cost. Available-for-sale securities are those investments j2 Global does not intend to hold to maturity and can be sold. Available-for-sale securities are carried at fair value with unrealized gains and losses included in other comprehensive income. Trading securities are carried at fair value, with unrealized gains and losses included in investment income. All securities are accounted for on a specific identification basis.
	(h)	Debt Issuance Costs and Debt Discount
	j2 Global capitalizes costs incurred with borrowing and issuance of debt securities and records debt discounts as a reduction to the debt amount. j2 Global capitalized third-party costs incurred in connection with its sale of senior unsecured notes within long-term other assets and recorded the original purchase discount as a reduction to such notes (see Note 8 - 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.
	(i)	Derivative Instruments
	j2 Global currently holds an embedded derivative instrument related to contingent interest in connection with its 3.25% Convertible Notes issued on June 10, 2014. This embedded derivative instrument is carried at fair value with changes recorded to interest expense (see Note 5 - Fair Value Measurements).
	(j)	Concentration of Credit Risk
	All of the Company’s cash, cash equivalents and marketable securities are invested at major financial institutions primarily within the United States, United Kingdom and Ireland. 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 December 31, 2014, the Company’s cash and cash equivalents were maintained in accounts that are insured up to the limit determined by the applicable governmental agency. The Company's deposits held in qualifying financial institutions in Ireland are fully insured through March 28, 2018 to the extent on deposit prior to March 28, 2013. With respect to the Company's deposits with financial institutions in other jurisdictions, the insured amount held in other institutions is immaterial in comparison to the total amount of the Company’s cash and cash equivalents held by these institutions which is not insured. These institutions are primarily in the United States and United Kingdom, however, the Company has accounts within several other countries including Australia, Austria, China, France, Germany, Italy, Japan, New Zealand, the Netherlands and Poland.
	(k)	Foreign Currency
	Some of j2 Global's foreign subsidiaries use the local currency of their respective countries as their functional currency. Assets and liabilities are translated at exchange rates prevailing at the balance sheet dates. Revenues, costs and expenses are translated into U.S. Dollars at average exchange rates for the period. Gains and losses resulting from translation are recorded as a component of accumulated other comprehensive income/(loss). Net translation gain/(loss) were $(14.7) million, $0.1 million and $1.4 million for the years ended December 31, 2014, 2013 and 2012, respectively. Realized gains and losses from foreign currency transactions are recognized within other expense (income), net. Net transaction gain/(loss) was $(0.1) million, $0.4 million and $(0.1) million for the years ended December 31, 2014, 2013 and 2012, respectively.
	(l)	Property and Equipment
	Property and equipment are stated at cost. Equipment under capital leases is stated at the present value of the minimum lease payments. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives of property and equipment range from one to 10 years. Fixtures, which are comprised primarily of leasehold improvements and equipment under capital leases, are amortized on a straight-line basis over their estimated useful lives or for leasehold improvements, the related lease term, if less. The Company has capitalized certain internal use software and website development costs which are included in property and equipment. The estimated useful life of costs capitalized is evaluated for each specific project and ranges from 1 to 5 years.
	(m)	Long-Lived Assets
	j2 Global accounts for long-lived assets, which include property and equipment and identifiable intangible assets with finite useful lives (subject to amortization), in accordance with the provisions of FASB ASC Topic No. 360, Property, Plant, and Equipment (“ASC 360”), which requires that long-lived assets be reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability is measured by comparing the carrying amount of an asset to the expected undiscounted future net cash flows generated by the asset. If it is determined that the asset may not be recoverable, and if the carrying amount of an asset exceeds its estimated fair value, an impairment charge is recognized to the extent of the difference.
	j2 Global assessed whether events or changes in circumstances have occurred that potentially indicate the carrying amount of long-lived assets may not be recoverable. No impairment was recorded in fiscal year 2014, 2013 and 2012.
	(n)	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. Intangible assets subject to amortization are amortized over the period of estimated economic benefit ranging from 1 to 20 years. In accordance with FASB ASC Topic No. 350, Intangibles - Goodwill and Other (“ASC 350”), goodwill and other intangible assets with indefinite lives are not amortized but tested annually for impairment or more frequently if j2 Global believes indicators of impairment exist. In connection with the annual impairment test for goodwill, the Company has the option to perform a qualitative assessment in determining whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the Company determines that it was more likely than not that the fair value of the reporting unit is less than its carrying amount, then it performs the impairment test upon goodwill. The impairment test involves a two-step process. The first step involves comparing the fair values of the applicable reporting units with their aggregate carrying values, including goodwill. The Company generally determines the fair value of its reporting units using the income approach methodology of valuation. If the carrying value of a reporting unit exceeds the reporting unit's fair value, j2 Global performs the second step of the test to determine the amount of impairment loss. The second step involves measuring the impairment by comparing the implied fair values of the affected reporting unit's goodwill and intangible assets with the respective carrying values. . In connection with the annual impairment test for indefinite-lived intangible assets, we have the option to perform a qualitative assessment in determining whether it is more likely than not that the fair value is less than its carrying amount, then we perform the impairment test upon indefinite-lived intangible assets. The impairment testing for indefinite-lived intangible assets consists of comparing the carrying values to the fair values and an impairment loss is recorded if the carrying value exceeds the fair value. j2 Global completed the required impairment review at the end of 2014, 2013 and 2012 and concluded that there were no impairments. Consequently, no impairment charges were recorded.
	(o)	Contingent Consideration
	j2 Global measures the contingent earn-out liabilities at fair value on a recurring basis using significant unobservable inputs classified within Level 3 of the fair value hierarchy (see Note 5 - Fair Value Measurements). The Company may use various valuation techniques depending on the terms and conditions of the contingent consideration including a Monte-Carlo simulation. This simulation uses probability distribution for each significant input to produce hundreds or thousands of possible outcomes and the results are analyzed to determine probabilities of different outcomes occurring. Significant increases or decreases to these inputs in isolation would result in a significantly higher or lower liability with a higher liability capped by the contractual maximum of the contingent earn-out obligation. Ultimately, the liability will be equivalent to the amount paid, and the difference between the fair value estimate and amount paid will be recorded in earnings. The amount paid that is less than or equal to the liability on the acquisition date is reflected as cash used in financing activities in our consolidated statements of cash flows. Any amount paid in excess of the liability on the acquisition date is reflected as cash used in operating activities.
	j2 Global reviews and re-assess the estimated fair value of contingent consideration on a quarterly basis, and the updated fair value could differ materially from the initial estimates. Changes in the estimated fair value of our contingent earn-out liabilities related to the time component of the present value calculation are reported in interest expense. Adjustments to the estimated fair value related to changes in all other unobservable inputs are reported in operating income.
	(p)	Income Taxes
	j2 Global's income is subject to taxation in both the U.S. and numerous foreign jurisdictions. Significant judgment is required in evaluating the Company's tax positions and determining its provision for income taxes. During the ordinary course of business, there are many transactions and calculations for which the ultimate tax determination is uncertain. j2 Global establishes reserves for tax-related uncertainties based on estimates of whether, and the extent to which, additional taxes will be due. These reserves for tax contingencies are established when the Company believes that certain positions might be challenged despite the Company's belief that its tax return positions are fully supportable. j2 Global adjusts these reserves in light of changing facts and circumstances, such as the outcome of a tax audit or lapse of a statute of limitations. The provision for income taxes includes the impact of reserve provisions and changes to reserves that are considered appropriate.
	j2 Global accounts for income taxes in accordance with FASB ASC Topic No. 740, Income Taxes (“ASC 740”), which requires that deferred tax assets and liabilities be recognized using enacted tax rates for the effect of temporary differences between the book and tax basis of recorded assets and liabilities. ASC 740 also requires that deferred tax assets be reduced by a valuation allowance if it is more likely than not that some or all of the net deferred tax assets will not be realized. The valuation allowance is reviewed quarterly based upon the facts and circumstances known at the time. In assessing this valuation allowance, j2 Global reviews historical and future expected operating results and other factors, including its recent cumulative earnings experience, expectations of future taxable income by taxing jurisdiction and the carryforward periods available for tax reporting purposes, to determine whether it is more likely than not that deferred tax assets are realizable.
	ASC 740 provides guidance on the minimum threshold that an uncertain income tax benefit is required to meet before it can be recognized in the financial statements and applies to all income tax positions taken by a company. ASC 740 contains a two-step approach to recognizing and measuring uncertain income tax positions. 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. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon settlement. If it is not more likely than not that the benefit will be sustained on its technical merits, no benefit will be recorded. Uncertain income tax positions that relate only to timing of when an item is included on a tax return are considered to have met the recognition threshold. j2 Global recognized accrued interest and penalties related to uncertain income tax positions in income tax expense on its consolidated statement of income.
	(q)	Share-Based Compensation
	j2 Global accounts for share-based awards in accordance with the provisions of FASB ASC Topic No. 718, Compensation - Stock Compensation (“ASC 718”). Accordingly, j2 Global measures share-based compensation expense at the grant date, based on the fair value of the award, and recognizes the expense over the employee's requisite service period using the straight-line method. The measurement of share-based compensation expense is based on several criteria, including but not limited to the valuation model used and associated input factors, such as expected term of the award, stock price volatility, risk free interest rate, dividend rate and award cancellation rate. These inputs are subjective and are determined using management's judgment. If differences arise between the assumptions used in determining share-based compensation expense and the actual factors, which become known over time, j2 Global may change the input factors used in determining future share-based compensation expense. Any such changes could materially impact the Company's results of operations in the period in which the changes are made and in periods thereafter. The Company estimates the expected term based upon the historical exercise behavior of our employees.
	j2 Global accounts for option grants to non-employees in accordance with FASB ASC Topic No. 505, Equity, whereby the fair value of such options is determined using the Black-Scholes option pricing model at the earlier of the date at which the non-employee's performance is complete or a performance commitment is reached.
	(r)	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 payment 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.
	(s)	Research, Development and Engineering
	Research, development and engineering costs are expensed as incurred. Costs for software development incurred subsequent to establishing technological feasibility, in the form of a working model, are capitalized and amortized over their estimated useful lives. To date, software development costs incurred after technological feasibility has been established have not been material.
	(t)	Segment Reporting
	FASB ASC Topic No. 280, Segment Reporting (“ASC 280”), establishes standards for the way that public business enterprises report information about operating segments in annual consolidated financial statements and requires that those enterprises report selected information about operating segments in interim financial reports. ASC 280 also establishes standards for related disclosures about products and services, geographic areas and major customers. As a result of the acquisition of Ziff Davis, Inc. as described in Note 3 - Business Acquisitions, the Company operates as two segments: (1) Business Cloud Services and (2) Digital Media.
	(u)	Advertising Costs
	Advertising costs are expensed as incurred. Advertising costs for the year ended December 31, 2014, 2013 and 2012 was $60.5 million, $55.4 million and $48.1 million, respectively.
	(v)	Sales Taxes
	The Company may collect sales taxes from certain customers which are remitted to governmental authorities as required and are excluded from revenues.
	(w)	Recent Accounting Pronouncements
	In July 2013, the FASB issued 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.
In November 2014, the FASB issued ASU No. 2014-16, Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share is More Akin to Debt or to Equity, which clarifies how current guidance should be interpreted in evaluating the economic characteristics and risks of a host contract in a hybrid financial instrument that is issued in the form of a share. Specifically, the amendments clarify that an entity should consider all relevant terms and features, including the embedded derivative feature being evaluated for bifurcation, in evaluating the nature of the host contract. The assessment of the substance of the relevant terms and features should incorporate a consideration of: (1) the characteristics of the terms and features themselves; (2) the circumstances under which the hybrid financial instrument was issued or acquired; and (3) the potential outcomes of the hybrid financial instrument, as well as the likelihood of those potential outcomes. The amendments in this ASU apply to all entities that are issuers of, or investors in, hybrid financial instruments that are issued in the form of a share. The amendments in this ASU are effective for annual reporting periods beginning after December 15, 2015, including interim periods within that reporting period. Early adoption is permitted. The Company is currently evaluating the impact of adoption on our financial statements and related disclosures.
In November 2014, the FASB issued ASU No. 2014-17, Business Combinations (Topic 805): Pushdown Accounting. The amendments in this ASU provide guidance on whether and at what threshold an acquired entity that is a business or nonprofit activity may elect to apply pushdown accounting in its separate financial statements upon a change-in control event in which an acquirer obtains control of the acquired entity. The amendments in this ASU are effective on November 18, 2014. After the effective date, an acquired entity can make an election to apply the guidance to future change-in control events or to its most recent change-in control event. However, if the financial statements for the period in which the most recent change-in control event occurred already have been issued or made available to be issued, the application of this guidance would be a change in accounting principle. The adoption of this standard is not expected to have a material impact on our financial statements.
Reclassifications
Certain prior year reported amounts have been reclassified to conform with the 2014 presentation.

Business_Acquisition

Business Acquisition	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Business Acquisition	Business Acquisitions
	The Company uses acquisitions as a strategy to grow its customer base by increasing its presence in new and existing markets, expand and diversify its service offerings, enhance its technology and acquire skilled personnel.
	The Company has completed the following acquisitions during the year ending December 31, 2014, paying the purchase price in cash for each transaction: (a) all of the shares of City Numbers, a Birmingham, UK-based worldwide provider of inbound local, national and international toll free phone numbers in over 80 countries; (b) all of the shares and certain assets of Securstore, an Iceland-based provider of cloud backup and recovery services for corporate and enterprise networks; (c) all of the shares of Livedrive®, a UK-based provider of online backup with added file sync features for professionals and individuals; (d) certain assets of Faxmate, a Brisbane-based provider of Internet fax; (e) all of the shares of Critical Software Ltd., a UK-based Email Security and Management company operating under the brand name iCriticalTM; (f) all of the shares of The Online Backup Company, a Scandinavian-based provider of cloud backup, disaster recovery and file sharing solutions for corporate and enterprise networks; (g) all of the shares and certain assets of eMedia Communications LLC, a provider of research to IT buyers and leads to IT vendors; (h) asset purchase of Contactology, Inc., a North Carolina-based provider of email marketing services; (i) certain assets of Back Up My Info!, a NY-based company focusing primarily on backup supporting small to mid-sized businesses in a variety of industries around the world; (j) certain assets of Web24, a Melbourne, Australia- based company which offers domain name, web hosting, dedicated or shared servers and related services primarily to small and mid-sized businesses in Australia and elsewhere; (k) all of the units of Excel Micro, a Philadelphia-based cloud email security and archiving solutions; (l) all of the units of Scene LLC (“Ookla”), a Washington-based leading provider of broadband and mobile speed testing; (m) all of the shares of NCSG Holding AB (“Stay Secure”), a Swedish-based provider of e-mail and web security services; (n) all of the shares of Comendo A/S, a Danish-based provider of e-mail security; (p) certain assets of TestudoData LLC, a Nevada-based provider of e-mail security; and (q) certain other immaterial acquisitions of fax, online data backup and application businesses.
	The consolidated statement of income, since the date of each acquisition, and balance sheet, as of December 31, 2014, reflect the results of operations of all 2014 acquisitions. For the year ended December 31, 2014, these acquisitions contributed $51.9 million to the Company's revenues. Net income contributed by these acquisitions was not separately identifiable due to j2 Global's integration activities. Total consideration for these transactions was $300.2 million, net of cash acquired and assumed liabilities and subject to certain post-closing adjustments.
	The following table summarizes the allocation of the purchase consideration for these acquisitions (in thousands):
	Assets and Liabilities	Valuation
	Accounts receivable	$	18,024
	Property and equipment		10,022
	Other assets		5,500
	Deferred tax asset		419
	Software		9,836
	Trade name		28,192
	Customer relationship		98,498
	Other intangibles		2,121
	Goodwill		184,837
	Deferred revenue		(29,182	)
	Deferred tax liability		(12,328	)
	Other accrued liabilities		(14,338	)
	Capital lease		(1,361	)
	Total	$	300,240
	In connection with the acquisition of Ookla, acquired on December 1, 2014, contingent consideration of up to an aggregate of $40.0 million may be payable upon achieving certain future income thresholds and was determined to have a fair value of $15 million which was recorded as an other long-term liability on the consolidated balance sheet at December 31, 2014. The fair value of the contingent consideration was determined using options-based valuation approaches based on various inputs, including discount rates, volatility and market risk which are not readily observable in the market, representing a Level 3 measurement within the fair value hierarchy (see Note 5 - Fair Value Measurements). As of December 31, 2014, the Company has holdbacks of $45.3 million (including the contingent consideration related to Ookla) in connection with acquisitions recorded as current and long-term liabilities in the consolidated balance sheet. These holdbacks represent amounts to ensure that certain representations and warranties provided by the sellers are effective.
	During 2014, the purchase price accounting has been finalized for the following acquisitions: (i) City Numbers, (ii) SecurStore, (iii) Faxmate and (iv) other immaterial fax, online data backup and application businesses. The initial accounting for all other 2014 acquisitions are 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. During the year ended December 31, 2014, the Company recorded final adjustments to the initial working capital related to prior period acquisitions, which resulted in a decrease to goodwill in the amount of $(1.0) million Actual amounts recorded upon finalization of the purchase accounting may differ materially from the information presented in this Annual Report on Form 10-K.
	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 year ended December 31, 2014 is $184.8 million, of which $89.4 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):
		Year ended
		December 31,			December 31,
		2014			2013
		(unaudited)			(unaudited)
	Revenues	$	672,701		$	626,906
	Net income attributable to j2 Global, Inc. common shareholders	$	119,773		$	132,480
	EPS - Basic	$	2.51		$	2.85
	EPS - Diluted	$	2.49		$	2.81
	2013
	The Company acquired the following companies during fiscal 2013, in each case for cash: (a) IGN Entertainment, Inc. ("IGN"), an online publisher of video games, entertainment and men's lifestyle content; (b) MetroFax, Inc., a provider of online faxing services and advanced features; (c) Backup Connect BV, an online backup provider based in the Netherlands; (d) NetShelter, the largest community of technology publishers dedicated to consumer electronics, computing and mobile communications; (e) Email Protection Agency Limited, a UK-based provider of email security, email management and network security services; (f) TechBargains.com, the leading deal aggregation website for electronic products; and (g) certain other immaterial share and asset acquisitions in the Business Cloud Services segment.
	The consolidated statement of income, since the date of each acquisition, and balance sheet, as of December 31, 2013, reflect the results of operations of all 2013 acquisitions. For the year ended December 31, 2013, these acquisitions contributed $98.1 million to the Company's revenues. Net income contributed by these acquisitions was not separately identifiable due to j2 Global's integration activities. Total consideration for these transactions was $147.7 million, net of cash acquired and assumed liabilities of $15.7 million and subject to certain post-closing adjustments.
	The following table summarizes the allocation of the purchase consideration as follows (in thousands):
	Assets and Liabilities	Valuation
	Accounts receivable	$	24,658
	Property and equipment		3,274
	Other assets		2,703
	Deferred tax asset		2,058
	Software		3,031
	Content		2,460
	Trade name		18,581
	Customer relationship		40,275
	Advertiser Relationship		11,770
	Other intangibles		168
	Goodwill		54,472
	Deferred revenue		(2,543	)
	Other accrued liabilities		(13,162	)
	Total	$	147,745
	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 year ended December 31, 2013 is $54.5 million, of which $36.6 million is expected to be deductible for income tax purposes.
	Pro Forma Financial Information for 2013 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 period presented. These pro forma results exclude any savings or synergies that would have resulted from these business acquisitions had they occurred on January 1 for the year ended December 31, 2012 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 2013 acquisitions as if each acquisition had occurred on January 1, 2012 (in thousands, except per share amounts):
		Year ended
		December 31,			December 31,
		2013			2012
		(unaudited)			(unaudited)
	Revenues	$	545,952		$	470,190
	Net income attributable to j2 Global, Inc. common shareholders	$	108,600		$	122,187
	EPS - Basic	$	2.34		$	2.64
EPS - Diluted	$	2.31		$	2.62
2012
Ziff Davis
The Company acquired substantially all of the outstanding capital stock of Ziff Davis on November 9, 2012 for a cash purchase price of approximately $171.7 million, net of cash acquired and assumed liabilities of $28.8 million and subject to certain post-closing adjustments.
The consolidated statement of income, since the date of the acquisition, and balance sheet as of December 31, 2012 reflect the results of operations of Ziff Davis. For the year ended December 31, 2012, Ziff Davis contributed $9.7 million to the Company's revenues and $1.6 million to its net income.
The following table summarizes the allocation of the purchase consideration (including the portion allocable to the minority interest) as follows (in thousands):
Assets and Liabilities	Valuation
Accounts receivable	$	14,450
Property and equipment		842
Software		4,780
Other assets		1,283
Deferred tax asset		1,139
Trade name		37,730
Customer relationship		5,380
Advertiser relationship		14,500
Licensing relationships		4,910
Other intangibles		2,540
Goodwill		112,882
Deferred revenue		(2,188	)
Other accrued liabilities		(4,767	)
Deferred tax liability		(21,829	)
Total	$	171,652
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 the acquisition of Ziff Davis during the year ended December 31, 2012 is $112.9 million, of which $12.9 million is expected to be deductible for income tax purposes.
Other 2012 Acquisitions
The consolidated statement of income, since the date of the applicable acquisitions, and balance sheet as of December 31, 2012 reflect the results of operations of all six 2012 acquisitions, including Ziff Davis as noted above. For the year ended December 31, 2012, the five acquisitions other than Ziff Davis (the "other acquisitions") contributed $16.9 million to the Company's revenues. Net income contributed by the other acquisitions was not separately identifiable due to j2 Global's integration activities.  Total consideration for the other acquisitions was $32.9 million, net of cash acquired. The financial impact to j2 Global for each of the other acquisitions, individually and in the aggregate, is immaterial as of the date of each acquisition.
Pro Forma Financial Information for 2012 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 period presented. These pro forma results exclude any savings or synergies that would have resulted from these business acquisitions had they occurred on January 1 for the year ended December 31, 2011 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 2012 acquisitions as if each acquisition had occurred on January 1, 2011 (in thousands, except per share amounts):
	Year ended
	December 31,			December 31,
	2012			2011
	(unaudited)			(unaudited)
Revenues	$	417,250		$	385,974
Net income attributable to j2 Global, Inc. common shareholders	$	120,210		$	114,889
EPS - Basic	$	2.6		$	2.47
EPS - Diluted	$	2.58		$	2.44

Investments

Investments	12 Months Ended
	Dec. 31, 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):
		December 31,		December 31, 2013
		2014
	Due within 1 year	$	59,896	$	46,339
	Due within more than 1 year but less than 5 years	60,178		44,865
	Due within more than 5 years but less than 10 years	—		—
	Due 10 years or after	330		2,486
	Total	$	120,404	$	93,690
	The following table summarizes the Company’s investments (in thousands):
		December 31,		December 31, 2013
		2014
	Available-for-sale	$	156,649	$	123,737
	Certificates of deposit	65		14,403
	Total	$	156,714	$	138,140
	The following table summarizes the gross unrealized gains and losses and fair values for investments classified as available for sale as of December 31, 2014 and December 31, 2013 aggregated by major security type (in thousands):
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			Losses
	December 31, 2014
	Corporate debt securities	$	91,456	$	147		$	(136	)	$	91,467
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	26,848		9			(13		)	26,844
	Debt securities issued by states of the United States and political subdivisions of the states	2,088		5			—			2,093
	Equity securities	20,611		15,634			—			36,245
	Total	$	141,003	$	15,795		$	(149	)	$	156,649
	December 31, 2013
	Corporate debt securities	$	66,587	$	134		$	(29	)	$	66,692
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	23,689		20			(7		)	23,702
	Debt securities issued by states of the United States and political subdivisions of the states	3,293		4			(1		)	3,296
	Equity securities	20,610		9,558			(121		)	30,047
	Total	$	114,179	$	9,716		$	(158	)	$	123,737
	At December 31, 2014 and 2013, 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 December 31, 2014. At December 31, 2014, equity securities were recorded as available-for-sale and primarily represent a strategic investment in Carbonite, Inc. On August 31, 2012, j2 Global submitted a preliminary non-binding proposal to acquire all outstanding shares for cash consideration of $10.50 per fully diluted share, representing a substantial premium to the market trading price of the shares on such date. On December 24, 2014, j2 Global initiated a cash tender offer to acquire all of the outstanding shares of Carbonite for cash consideration of $15.00 per share, subject to the terms and conditions. On March 2, 2015, the Company effectively rescinded its tender offer and entered into a confidentiality agreement with Carbonite Inc. At December 31, 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. Short-term investments include restricted balances which the Company may not liquidate until maturity, generally within 12 months. Restricted balances included in short-term investments were $0.1 million at December 31, 2014. For the years ended December 31, 2014, 2013 and 2012, the Company recorded realized gains (losses) from the sale of investments of approximately $0.1 million, $(0.1) million and $0.3 million, respectively.
	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, while such losses related to held-to-maturity securities are not recorded, as these investments are carried at their amortized cost.
	Regardless of the classification of the securities as available-for-sale or held-to-maturity, 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 and held-to-maturity securities that management has no intent to sell and believes that it more-likely-than-not that it will not be required to sell prior to recovery, only the credit loss component of the impairment is recognized in earnings, while the rest of the fair value impairment is recognized in other comprehensive income. The credit loss component recognized in earnings is identified as the amount of principal cash flows not expected to be received over the remaining term of the security.
	The following tables present gross unrealized losses and fair values for those investments that were in an unrealized loss position as of December 31, 2014 and December 31, 2013, aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in thousands):
		As of December 31, 2014
		Less than 12 Months					12 Months or Greater						Total
		Fair Value		Unrealized Loss			Fair Value			Unrealized Loss			Fair Value		Unrealized Loss
	Corporate debt securities	$	57,898	$	(131	)	$	1,260		$	(5	)	$	59,158	$	(136	)
	Debt securities issued by states of the United States and political subdivisions of the states	15,072		(13		)	—			—			15,072		(13		)
	Total	$	72,970	$	(144	)	$	1,260		$	(5	)	$	74,230	$	(149	)
		As of December 31, 2013
		Less than 12 Months					12 Months or Greater						Total
		Fair Value		Unrealized Loss			Fair Value			Unrealized Loss			Fair Value		Unrealized Loss
	Corporate debt securities	$	9,944	$	(4	)	$	1,263		$	(3	)	$	11,207	$	(7	)
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	109		(1		)	—			—			109		(1		)
	Debt securities issued by states of the United States and political subdivisions of the states	26,445		(28		)	777			(2		)	27,222		(30		)
Equity securities	832		(120		)	—			—			832		(120		)
Total	$	37,330	$	(153	)	$	2,040		$	(5	)	$	39,370	$	(158	)
During the years ended December 31, 2014 and December 31, 2013, we did not recognize any other-than-temporary impairment losses.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Fair Value Measurements
	j2 Global complies with the provisions of ASC 820, which defines fair value, provides a framework for measuring fair value and expands the disclosures required for fair value measurements of financial and non-financial assets and liabilities. ASC 820 clarifies that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. As a basis for considering such assumptions, ASC 820 establishes a three-tier value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value:
		§	Level 1 – Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.
		§	Level 2 – Include other inputs that are directly or indirectly observable in the marketplace.
		§	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 8 - 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 aforementioned information is available, the fair value of these securities are 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 Level 2 inputs. In addition, the Company may pay contingent interest on the Convertible Notes which is accounted for as a derivative with fair value adjustments being recorded to interest expense. This derivative is fair valued using a binomial lattice convertible bond pricing model using historical and implied market information, which are Level 2 inputs. The total carrying value of long-term debt was $593.4 million and $245.7 million, and the corresponding fair value was approximately $711.1 million and $283.3 million, at December 31, 2014 and December 31, 2013, respectively.
	The Company classifies its contingent consideration liability in connection with the acquisition of Ookla (see Note 3 - Business Acquisitions) within Level 3 because factors used to develop the estimated fair value are unobservable inputs, such as volatility and market risks, and are not supported by market activity. The fair value of the contingent consideration liability was determined using option based approaches. This methodology was utilized because the distribution of payments is not symmetric and amounts are only payable upon certain EBITDA thresholds being reached. Such valuation approach included a Monte-Carlo simulation for the contingency since the financial metric driving the payments is path dependent. Significant increases or decreases in either of the inputs noted above in isolation would result in a significantly lower or higher fair value measurement.
	The following tables present the fair values of the Company’s financial assets or liabilities that are measured at fair value on a recurring basis (in thousands):
	December 31, 2014	Level 1		Level 2		Level 3		Fair Value
	Assets:
	Cash equivalents:
	Money market and other funds	$	212,645	$	—	$	—	$	212,645
	Time deposits	—		51,807		—		51,807
	Certificates of Deposit	—		65		—		65
	Equity securities	36,245		—		—		36,245
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	—		26,844		—		26,844
	Debt securities issued by states of the United States and political subdivisions of the states	—		2,093		—		2,093
	Corporate debt securities	—		91,467		—		91,467
	Total assets measured at fair value	$	248,890	$	172,276	$	—	$	421,166
	Liabilities:
	Contingent consideration	$	—	$	—	$	15,000	$	15,000
	Contingent interest derivative	—		742		—		742
	Total liabilities measured at fair value	$	—	$	742	$	15,000	$	15,742
	December 31, 2013	Level 1		Level 2		Level 3		Fair Value
	Assets:
	Cash equivalents:
	Money market and other funds	$	101,231	$	—	$	—	$	101,231
	Time deposits	22,773		—		—		22,773
	Certificates of Deposit	14,403		—		—		14,403
	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 United States and political subdivisions of the states	3,296		—		—		3,296
	Corporate debt securities	66,692		—		—		66,692
	Total assets measured at fair value	$	262,144	$	—	$	—	$	262,144
	At the end of each reporting period, management reviews the inputs to measure the fair value measurements of financial and non-financial assets and liabilities to determine when transfers between levels are deemed to have occurred. On September 30, 2014, management reevaluated the inputs of its Level 1 assets used in determining fair value 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.
	The following tables presents a reconciliation of the Company’s Level 3 financial assets or liabilities that are measured at fair value on a recurring basis (in thousands):
		Level 3		Affected line item in the Statement of Income
	Balance as of December 31, 2013	$	—
	Contingent consideration	15,000		Not Applicable
	Total (gains) losses reported in earnings	—
	Transfers into or out of Level 3	—
	Balance as of December 31, 2014	$	15,000
	The following tables presents a reconciliation of the Company’s derivative instruments (in thousands):
		Amount		Affected line item in the Statement of Income
	Derivative Liabilities:
	Level 2:
	Balance as of December 31, 2013	$	—
	Contingent interest	372
	Total (gains) losses reported in earnings	370		Interest expense (income), net
	Balance as of December 31, 2014	$	742
	Losses associated with other-than-temporary impairments are recorded as a component of other income (expenses). Gains and losses not associated with other-than-temporary impairments are recorded as a component of other comprehensive income.

Property_And_Equipment

Property And Equipment	12 Months Ended
	Dec. 31, 2014
Property And Equipment [Abstract]
Property, Plant and Equipment Disclosure [Text Block]	Property and Equipment
	Property and equipment, stated at cost, at December 31, 2014 and 2013 consisted of the following (in thousands):
		2014			2013
	Computers and related equipment	$	100,537		$	79,576
	Furniture and equipment	1,763			1,405
	Leasehold improvements	9,098			5,718
		111,398			86,699
	Less: Accumulated depreciation and amortization	(73,181		)	(55,499		)
	Total property and equipment, net	$	38,217		$	31,200
	Depreciation and amortization expense was $15.5 million, $9.6 million and $6.2 million for the year ended December 31, 2014, 2013 and 2012, respectively.
	Total disposals of long-lived assets for the year ended December 31, 2014, 2013 and 2012 was $0.6 million, $0.9 million and $0.9 million, respectively.

Goodwill_And_Intangible_Assets

Goodwill And Intangible Assets	12 Months Ended
	Dec. 31, 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. Identifiable intangible assets are comprised of purchased customer relationships, trademarks and trade names, developed technologies and other intangible assets. 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. 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 year ended December 31, 2014 and 2013 are as follows (in thousands):
		Business Cloud Services				Digital Media				Consolidated
	Balance as of January 1, 2013	$	294,943			$	112,882			$	407,825
	Goodwill acquired	21,551				32,921				54,472
	Purchase Accounting Adjustments	(259		)		(5,065		)		(5,324		)
	Foreign exchange translation	447				2				449
	Balance as of December 31, 2013	$	316,682			$	140,740			$	457,422
	Goodwill acquired	79,536				105,301				184,837
	Purchase accounting adjustments	(706		)		(329		)		(1,035		)
	Foreign exchange translation	(5,449		)		(100		)		(5,549		)
	Balance as of December 31, 2014	$	390,063			$	245,612			$	635,675
	The Company's goodwill balance was $635.7 million as of December 31, 2014, of which $390.1 million and $245.6 million were recorded in the Business Cloud Services and Digital Media segments, respectively. The Company's goodwill balance was $457.4 million as of December 31, 2013, of which $316.7 million and $140.7 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 years business acquisitions. See Note 3 - Business Acquisitions - for a discussion related to purchase accounting adjustments.
	Intangible assets are summarized as of December 31, 2014 and 2013 as follows (in thousands):
	Intangible Assets with Indefinite Lives:
		2014				2013
	Trade names	$	27,379			$	27,379
	Other	5,432				5,432
	Total	$	32,811			$	32,811
	In accordance with ASC 350, the Company performed the annual impairment test for goodwill for fiscal year 2014 using a qualitative assessment primarily taking into consideration macroeconomic, industry and market conditions, overall financial performance and any other relevant company-specific events. The Company performed the annual impairment test for intangible assets with indefinite lives for fiscal 2014 using a quantitative assessment primarily taking into consideration a discounted cash flow analysis of the relief of royalty payments. j2 Global concluded that there were no impairments in 2014, 2013 and 2012.
	Intangible Assets Subject to Amortization:
	As of December 31, 2014, intangible assets subject to amortization relate primarily to the following (in thousands):
		Weighted-Average		Historical				Accumulated				Net
		Amortization		Cost				Amortization
		Period
	Trade names	14.5 years		$	94,770			$	16,598			$	78,172
	Patent and patent licenses	9.0 years		62,940				38,013				24,927
	Customer relationships	9.3 years		230,424				66,658				163,766
	Other purchased intangibles	4.3 years		28,360				16,236				12,124
	Total			$	416,494			$	137,505			$	278,989
	As of December 31, 2013, intangible assets subject to amortization relate primarily to the following (in thousands):
		Weighted-Average		Historical				Accumulated				Net
		Amortization		Cost				Amortization
		Period
	Trade names	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
	Expected amortization expense for intangible assets subject to amortization at December 31, 2014 are as follows (in thousands):
	Fiscal Year:
	2015	$	56,349
	2016	50,380
	2017	42,081
	2018	28,940
	2019	22,137
	Thereafter	79,102
	Total expected amortization expense	$	278,989
	Amortization expense was $47.4 million, $30.2 million and $16.0 million for the years ended December 31, 2014, 2013 and 2012, respectively.

Long_Term_Debt

Long Term Debt	12 Months Ended
	Dec. 31, 2014
Long-term Debt, Unclassified [Abstract]
Debt Disclosure [Text Block]	Long-Term Debt
	8.0% Senior Notes
	On July 26, 2012, the Company's subsidiaries, issued in a private offering exempt from the registration requirements of the Securities Act of 1933, as amended, $250 million aggregate principal amount of 8.0% senior unsecured notes (the “Senior Notes”) due August 1, 2020. j2 Cloud Services, Inc. received proceeds of $245 million in cash, net of initial purchaser's discounts and commissions of $5 million. As of December 31, 2014, the unamortized discount on Senior Notes was approximately $3.8 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 December 31, 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. 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 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 the j2 Cloud Services, Inc. subsidiaries as of December 31, 2014, because, as of such date, all of j2 Cloud Services existing domestic restricted subsidiaries are deemed insignificant subsidiaries (as that term is defined in the indenture). 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 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. is obligations under the Senior Notes. In connection with the formation of j2 Global, Inc. as a holding company in 2014, j2 Global, Inc. unconditionally guaranteed, on an unsecured basis, the obligations of j2 Cloud Services, Inc. under the Senior Notes and the indenture governing the Senior Notes.
	The indenture governing the Senior Notes contain certain restrictive and other covenants applicable to j2 Cloud Services, Inc. and subsidiaries designated as restricted subsidiaries including, but not limited to, limitations on debt and disqualified or preferred stock, restricted payments, liens, sale and leaseback transactions, dividends and other payment restrictions, asset sales and transactions with affiliates. Restricted payments are applicable only if j2 Cloud Services, Inc. and subsidiaries designated as restricted subsidiaries has a pro forma leverage ratio of greater than 1.75 to 1.0. In addition, if such leverage ratio is in excess of 1.75 to 1.0, restricted payments are permitted up to $50 million. As of December 31, 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.
	As of December 31, 2014, the estimated fair value of the Senior Notes was approximately $262.4 million and was based on the quoted market prices of debt instruments with similar terms, credit rating and maturities of the Senior Notes as of December 31, 2014.
	3.25% Convertible Notes
	On June 10, 2014, j2 Global issued $402.5 million aggregate principal amount of 3.25% convertible senior notes due June 15, 2029 (the “Convertible Notes”). j2 Global received proceeds of $391.4 million in cash, net of underwriters' discounts and commissions. The net proceeds were available for general corporate purposes, 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 with the six-month interest period commencing on June 15, 2021, the Company must pay contingent interest on the Convertible Notes during any six-month interest period if the trading price per $1,000 principal amount of the Convertible Notes for each of the five trading days immediately preceding the first day of such interest period equals or exceeds $1,300. Any contingent interest payable on the Convertible Notes will be in addition to the regular interest payable on the Convertible Notes.
	Holders may surrender their Convertible Notes for conversion at any time prior to the close of business on the business day immediately preceding the maturity date only if one or more of the following conditions is satisfied: (i) during any calendar quarter commencing after the calendar quarter ending on September 30, 2014 (and only during such calendar quarter), if the closing sale price of j2 Global common stock for at least 20 trading days in the period of 30 consecutive trading days ending on the last trading day of the calendar quarter immediately preceding the calendar quarter in which the conversion occurs is more than 130% of the applicable conversion price of the Convertible Notes on each such trading day; (ii) during the five consecutive business day period following any ten consecutive trading day period in which the trading price for the Convertible Notes for each such trading day was less than 98% of the product of (a) the closing sale price of j2 Global common stock on each such trading day and (b) the applicable conversion rate on each such trading day; (iii) if j2 Global calls any or all of the Convertible Notes for redemption, at any time prior to the close of business on the business day prior to the redemption date; (iv) upon the occurrence of specified corporate events; or (v) during either the period beginning on, and including, March 15, 2021 and ending on, but excluding, June 20, 2021 or the period beginning on, and including, March 15, 2029 and ending on, but excluding, the maturity date. j2 Global will settle conversions of Convertible Notes by paying or delivering, as the case may be, cash, shares of j2 Global common stock or a combination thereof at j2 Global's election. The Company currently intends to satisfy its conversion obligation by paying and delivering a combination of cash and shares of the Company's common stock, where cash will be used to settle each $1,000 of principal and the remainder, if any, will be settled via shares of the Company's common stock.
	The initial conversion rate is 14.4159 shares of j2 Global common stock for each $1,000 principal amount of Convertible Notes, which represents an initial conversion price of approximately $69.37 per share of j2 Global common stock. The conversion rate is subject to adjustment for certain events as set forth in the indenture governing the Convertible Notes, but will not be adjusted for accrued interest. In addition, following certain corporate events that occur on or prior to June 20, 2021, j2 Global will increase the conversion rate for a holder that elects to convert its Convertible Notes in connection with such a corporate event.
	j2 Global may not redeem the Convertible Notes prior to June 20, 2021. On or after June 20, 2021, j2 Global may redeem for cash all or part of the Convertible Notes at a redemption price equal to 100% of the principal amount of the Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the Convertible Notes.
	Holders have the right to require j2 Global to repurchase for cash all or part of their Convertible Notes on each of June 15, 2021 and June 15, 2024 at a repurchase price equal to 100% of the principal amount of the Convertible Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the relevant repurchase date. In addition, if a fundamental change, as defined in the indenture governing the Convertible Notes, occurs prior to the maturity date, holders may require j2 Global to repurchase for cash all or part of their Convertible Notes at a repurchase price equal to 100% of the principal amount of the Convertible Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date.
	The Convertible Notes are the Company's general senior unsecured obligations and rank: (i) senior in right of payment to any of the Company's future indebtedness that is expressly subordinated in right of payment to the Convertible Notes; (ii) equal in right of payment to the Company's existing and future unsecured indebtedness that is not so subordinated, including in respect of j2 Global's guarantee of the obligations of our subsidiary, j2 Cloud Services, Inc., with respect to its outstanding Senior Notes; (iii) effectively junior in right of payment to any of the Company's secured indebtedness to the extent of the value of the assets securing such indebtedness; and (iv) structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company's subsidiaries.
	Accounting for the Convertible Notes
	In accordance with ASC 470-20, Debt with Conversion and Other Options, convertible debt that can be settled for cash is required to be separated into the liability and equity component at issuance, with each component assigned a value. The value assigned to the liability component is the estimated fair value, as of the issuance date, of similar debt without the conversion feature. The difference between the cash proceeds and estimated fair value of the liability component, representing the value of the conversion premium assigned to the equity component, is recorded as a debt discount on the issuance date. This debt discount is amortized to interest expense using the effective interest method over the period from the issuance date through the first stated repurchase date on June 15, 2021.
	j2 Global estimated the borrowing rates of similar debt without the conversion feature at origination to be 5.79% for the Convertible Notes and determined the debt discount to be $59.0 million. As a result, a conversion premium after tax of $37.7 million was recorded in additional paid-in capital. As of December 31, 2014, the carrying value of the Convertible Notes was $347.2 million, which consisted of $402.5 million outstanding principal amount net of $55.3 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 December 31, 2014, the remaining period over which the unamortized debt discount will be amortized is 6.5 years.
	In connection with the issuance of the Convertible Notes, the Company incurred $11.7 million of deferred issuance costs, which primarily consisted of the underwriters' discount and legal and other professional service fees. Of the total deferred issuance costs incurred, $10.0 million of such deferred issuance costs 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 December 31, 2014 was $9.3 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 year ended December 31, 2014, the Company recognized interest expense of $11.7 million related to the Convertible Notes, comprised of $7.0 million for the contractual coupon interest, $3.7 million related to the amortization of debt discount, $0.6 million related to the amortization of deferred debt issuance costs and fair value adjustments of contingent interest of $0.4 million.
	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 December 31, 2014, the estimated fair value of the Convertible Notes was approximately $448.7 million.
	Long-term debt as of December 31, 2014 consists of the following (in thousands):
	Senior Notes	$	246,187
	Convertible Notes	347,163
	Total long-term debt	$	593,350
	Less: Current portion	—
	Total long-term debt, less current portion	$	593,350
	At December 31, 2014, future principal payments for debt were as follows (in thousands):
	Year Ended December 31,
	2015	$	—
	2016	—
	2017	—
	2018	—
	2019	—
	Thereafter	652,500
		$	652,500
	Interest expense was $32.5 million, $22.3 million and $9.0 million for the year ended December 31, 2014, 2013 and 2012, respectively.

Mandatorily_Redeemable_Financi

Mandatorily Redeemable Financial Instrument (Notes)	12 Months Ended
	Dec. 31, 2014
Mandatorily Redeemable Financial Instrument [Abstract]
Mandatorily Redeemable Financial Instrument [Text Block]	Mandatorily Redeemable Financial Instrument
	On November 9, 2012, the Company acquired substantially all of the issued and outstanding capital stock of Ziff Davis, Inc. ("Ziff Davis"). In connection with the acquisition, the issued and outstanding capital stock was exchanged for shares of Series A Cumulative Participating Preferred Stock ("Series A Stock") of Ziff Davis. Ziff Davis is accounted for as a consolidated subsidiary as of the date of acquisition. Certain minority interest holders received an ownership in Series A Stock which was accounted for as a non-controlling interest. On December 31, 2013, in connection with a reorganization of Ziff Davis, Inc. to Ziff Davis, LLC (the "Reorganization"), the Company acquired all of the minority interest holders' equity interests, including their Series A Stock.
	The Series A Stock bore a 15% annual cumulative dividend, compounded quarterly, whether or not earned or declared and whether or not there are funds legally available for payment of dividends. The Series A Stock was subject to mandatory repayment or redemption on November 9, 2017, which Ziff Davis could repay or redeem the Series A at its option prior to the mandatory repayment or redemption date. The repayment amount represented $1,000 for each share of Series A Stock and all accrued but unpaid dividends, subject to certain reduction when repaid. The redemption amount represented $1,000 for each share of Series A Stock and all accrued but unpaid dividends plus the fair market value of a notional number of shares of Ziff Davis common stock on a basis of 485 5/7 common shares per share of Series A Stock.
	The Series A Stock met the definition of a mandatorily redeemable financial instrument which requires liability classification and remeasurement at each reporting period on the consolidated subsidiaries financial statements. As the fair value of the Series A Stock was less than the mandatory redemption amount at issuance, periodic accretions using the interest method were made so that the carrying amount equaled the redemption amount on the mandatory redemption date.
	In connection with the Reorganization, the Company issued to the minority holders shares of j2 common stock, j2 Series A Preferred Stock and j2 Series B Preferred Stock equal to the fair market value of the minority holders' Series A Stock (see Note 12 - Stockholders' Equity). As a result of the Reorganization, the Series A Stock was extinguished, resulting in loss on extinguishment of debt and related interest expense of $14.4 million within the consolidated statement of income, in accordance with ASC 480, Distinguishing Liabilities from Equity.

Commitments_And_Contingencies

Commitments And Contingencies	12 Months Ended
	Dec. 31, 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 motion 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 covenant 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 covenant not to sue. On March 21, 2014, the Northern District of California ordered granted summary judgment dismissing IGC’s breach of contract claims in both actions and on May 5, 2014, denied IGC's motion for reconsideration. On June 27, 2014, the Northern District of California transferred the cases to the Central District of California (Nos. 2:14-cv-5128 and 2:14-cv-5139). On January 15, 2015, the Central District of California denied IGC’s request for entries of final judgment on the breach of contract claims, which would have allowed IGC to immediately appeal the grant of summary judgment. On January 23, 2015, the j2 Global affiliates filed amended counterclaims adding the ’980 Patent to the first action (No. 2:14-cv-5128) so that the Central District of California could administratively close the second action (No. 2:14-cv-5139). IGC filed additional counterclaims of its own on February 11, 2015. In addition to the counterclaims previously asserted, IGC added a counterclaim for breach of the implied covenant of good faith and fair dealing and a request for a declaration that IGC has an express license to the ’066 Patent. Discovery is ongoing.
	On January 17, 2013, the Commissioner of the Massachusetts Department of Revenue (“Commissioner”) issued a notice of assessment to a j2 Global affiliate for sales and use tax for the period of July 1, 2003 through December 31, 2011. On 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). Huster filed an amended complaint on February 11, 2015, which she corrected on February 12, 2015. The amended complaint added claims of fraudulent concealment, breach of fiduciary duty, unjust enrichment, breach of contract, breach of a private duty, conversion, and breach of the implied covenant of good faith and fair dealing. The j2 Global affiliates have not yet responded.
	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 (No. 14-1611). 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 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 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.
	Credit Agreement
	On January 5, 2009, the Company entered into a Credit Agreement with Union Bank, N.A. in order to further enhance its liquidity in the event of potential acquisitions or other corporate purposes (the "Credit Agreement"). The Credit Agreement was amended on August 16, 2010, July 13, 2012, November 9, 2012 and November 19, 2013. The July 13, 2012 amendment was entered into in connection with the issuance of senior unsecured notes as discussed in Note 8 - Long-Term Debt - and extended the Revolving Credit Commitment Termination Date (as defined in the Credit Agreement) to November 14, 2013. The November 9, 2012 amendment was entered into in connection with the acquisition of Ziff Davis, Inc. as discussed in Note 3 - Business Acquisitions. The November 19, 2013 amendment extended the revolving credit commitment termination date to November 14, 2016 and amended certain definitions and covenants. On November 26, 2014, the Company and Union Bank, N.A. mutually agreed to terminate the Credit Agreement dated January 5, 2009, by and between the Company and Union Bank. The Credit Agreement provided for a $40.0 million revolving line of credit which had never been drawn upon.
	Operating Leases
	j2 Global leases certain facilities and equipment under non-cancelable operating leases which expire at various dates through 2024. Office and equipment leases are typically for terms of three to five years and generally provide renewal options for terms up to an additional five years. In most cases, the Company expects leases that expire will be renewed or replaced by other leases with similar terms. Future minimum lease payments at December 31, 2014 under non-cancelable operating leases (with initial or remaining lease terms in excess of one year) are as follows (in thousands):
		Lease Payments
	Fiscal Year:
	2015	$	9,025
	2016	7,737
	2017	5,412
	2018	4,734
	2019	3,251
	Thereafter	1,161
	Total minimum lease payments	$	31,320
	Rental expense for the years ended December 31, 2014, 2013 and 2012 was $9.7 million, $7.7 million and $3.2 million, respectively.
	Sublease
	Total sublease income for the year ended December 31, 2014 was $0.1 million. Total estimated aggregate sublease income to be received in the future is $2.4 million.
	Capital Leases
	As of December 31, 2014 and 2013, assets held under capital leases are as follows:
		2014			2013
	Capital leases	$	805		$	—
	Less: Accumulated depreciation	(440		)	—
	Total capital leases, net	$	365		$	—
	Future minimum payments at December 31, 2014 under all capital leases (with initial or remaining lease terms in excess of one year) are as follows (in thousands):
		Future Payments
	Fiscal Year:
	2015	$	314
	2016	77
	2017	8
	2018	—
	2019	—
	Thereafter	—
	Total minimum lease payments	$	399
	Depreciation expense under capital leases for the years ended December 31, 2014, 2013 and 2012 was $0.4 million, zero and zero, respectively.
	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 (subsequently extended through October 1, 2015), does not prohibit federal, state or local authorities from collecting taxes on our income or from collecting taxes that are due under existing tax rules.
	The Company is currently under audit for indirect taxes in several states and municipalities. The Company currently has no reserves established for these matters, as the Company has determined that the liability is not probable and estimable. However, it is reasonably possible that such a liability could be incurred, which would result in additional expense, which could materially impact our financial results.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The provision for income tax consisted of the following (in thousands):
		Years Ended December 31,
		2014				2013				2012
	Current:
	Federal	$	22,074			$	22,834			$	20,759
	State	3,822				2,676				(289		)
	Foreign	13,977				9,415				11,639
	Total current	39,873				34,925				32,109
	Deferred:
	Federal	(958		)		3,678				2,427
	State	(5,019		)		(235		)		314
	Foreign	(4,056		)		(3,193		)		(1,591		)
	Total deferred	(10,033		)		250				1,150
	Total provision	$	29,840			$	35,175			$	33,259
	A reconciliation of the statutory federal income tax rate with j2 Global's effective income tax rate is as follows:
		Years Ended December 31,
		2014		2013			2012
	Statutory tax rate	35	%		35	%		35	%
	State income taxes, net	0.6			0.3			0.5
	Foreign rate differential	(13.8	)		(17.9	)		(17.4	)
	Reserve for uncertain tax positions	(2.2	)		4.3			4.9
	Valuation allowance	2.6			1.9			3.2
	IRC Section 199 deductions	(0.5	)		(0.5	)		(3.4	)
	Other	(2.5	)		1.6			(1.3	)
	Effective tax rates	19.2	%		24.7	%		21.5	%
	The Company's effective rate for each year is normally lower than the 35% U.S. federal statutory plus applicable state income tax rates primarily due to earnings of j2 Global's subsidiaries outside of the U.S. in jurisdictions where the effective tax rate is lower than in the U.S.
	Deferred tax assets and liabilities result from differences between the financial statement carrying amounts and the tax bases of existing assets and liabilities. Temporary differences and carryforwards which give rise to deferred tax assets and liabilities are as follows (in thousands):
		Years Ended December 31,
		2014				2013
	Deferred tax assets:
	Net operating loss carryforwards	$	13,774			$	9,596
	Tax credit carryforwards	14,091				9,233
	Accrued expenses	7,114				1,196
	Allowance for bad debt	1,132				1,423
	Share-based compensation expense	3,632				4,917
	Basis difference in fixed assets	—				1,266
	Impairment of investments	76				161
	Gain on sale of intangible assets	—				123
	Deferred revenue	250				812
	State taxes	2,333				1,451
	Other	789				—
		43,191				30,178
	Less:  valuation allowance	(11,358		)		(8,493		)
	Total deferred tax assets	$	31,833			$	21,685
	Deferred tax liabilities:
	Basis difference in fixed assets	$	(5,883	)		$	—
	Basis difference in intangible assets	(51,566		)		(47,711		)
	Prepaid insurance	(420		)		(369		)
	Convertible debt	(26,272		)		—
	Other	(7,981		)		(6,359		)
	Total deferred tax liabilities	(92,122		)		(54,439		)
	Net deferred tax liabilities	$	(60,289	)		$	(32,754	)
	The Company had approximately $31.8 million and $21.7 million in deferred tax assets as of December 31, 2014 and 2013, respectively, related primarily to tax credit carryforwards, net operating loss carryforwards and accrued expenses treated differently between its financial statements and its tax returns. Based on the weight of available evidence, the Company assesses whether it is more likely than not that some portion or all of a deferred tax asset will not be realized. If necessary, j2 Global records a valuation allowance sufficient to reduce the deferred tax asset to the amount that is more likely that not to be realized. The deferred tax assets should be realized through future operating results and the reversal of temporary differences.
	As of December 31, 2014, the Company had federal net operating loss carryforwards (“NOLs”) of $20.5 million, after considering substantial restrictions on the utilization of these NOLs due to “ownership changes”, as defined in the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”). j2 Global currently estimates that all of the above-mentioned federal NOLs will be available for use before their expiration. These NOLs expire through the year 2031. As of December 31, 2014 and 2013, the Company has foreign tax credits of $11.1 million and $7.8 million, respectively. The Company has provided a valuation allowance on the foreign tax credits of $11.1 million and $7.7 million, respectively, as the weight of available evidence does not support full utilization of these credits. The foreign tax credits expire through the year 2024. In addition, as of December 31, 2014 and 2013, the Company had state research and development tax credits of $2.0 million and $0.9 million, respectively, which last indefinitely. As of December 31, 2014 and 2013, the Company had state enterprise zone tax credits of $0.9 million and $0.5 million, respectively. The state enterprise zone credits expire through the year 2024. j2 Global estimates that all of the state enterprise zone credits will be available for use before their expiration.
	Certain tax payments are prepaid during the year and included within prepaid expenses and other current assets on the consolidated balance sheet. The Company's prepaid tax payments were $5.8 million and $11.3 million at December 31, 2014 and 2013, respectively.
	Uncertain Income Tax Positions
	Tax positions are evaluated in a two-step process. The Company first determines whether it is more likely than not that a tax position will be sustained upon examination. If a tax position meets the more-likely-than-not recognition threshold, it is then measured to determine the amount of benefit to recognize in the financial statements. The tax position is measured as the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. The Company classifies gross interest and penalties and unrecognized tax benefits that are not expected to result in payment or receipt of cash within one year as non-current liabilities in the consolidated balance sheets.
	As of December 31, 2014, the total amount of unrecognized tax benefits was $34.6 million, of which $32.7 million, if recognized, would affect the Company’s effective tax rate. As of December 31, 2013, the total amount of gross unrecognized tax benefits was $40.9 million, of which $40.9 million, if recognized, would affect the Company’s effective tax rate. As of December 31, 2012, the total amount of unrecognized tax benefits was $35.4 million, of which $35.4 million, if recognized would affect the Company's effective tax rate.
	The aggregate changes in the balance of gross unrecognized tax benefits, which excludes interest and penalties, for 2014, 2013 and 2012, is as follows (in thousands):
		Years Ended December 31,
		2014				2013				2012
	Beginning balance	$	40,888			$	35,421			$	28,366
	Increases related to tax positions during a prior year	919				58				1,022
Decreases related to tax positions taken during a prior year	(9,808		)		(1,519		)		(557		)
Increases related to tax positions taken in the current year	3,765				6,928				6,590
Decreases related to expiration of statute of limitations	(1,129		)		—				—
Ending balance	$	34,635			$	40,888			$	35,421
The Company includes interest and penalties related to unrecognized tax benefits within the provision for income taxes. As of December 31, 2014, 2013 and 2012, the total amount of interest and penalties accrued was $2.9 million, $3.0 million and $2.3 million, respectively, which is classified as non-current liabilities in the consolidated balance sheets. In connection with tax matters, the Company recognized interest and penalty (benefit) expense in 2014, 2013 and 2012 of $(0.1) million, $0.7 million and $0.5 million, respectively.
Uncertain income tax positions are reasonably possible to significantly change during the next 12 months as a result of completion of income tax audits and expiration of statutes of limitations. At this point it is not possible to provide an estimate of the amount, if any, of significant changes in reserves for uncertain income tax positions as a result of the completion of income tax audits that are reasonably possible to occur in the next 12 months. In addition, the Company cannot currently estimate the amount of, if any, uncertain income tax positions which will be released in the next 12 months as a result of expiration of statutes of limitations due to ongoing audits. As a result of ongoing federal, state and foreign income tax audits (discussed below), it is reasonably possible that our entire reserve for uncertain income tax positions for the periods under audit will be released. It is also reasonably possible that the Company's reserves will be inadequate to cover the entire amount of any such income tax liability.
The Company has not provided U.S. income taxes and foreign withholding taxes on the undistributed earnings of foreign subsidiaries as of December 31, 2014 because it intends to permanently reinvest such earnings outside the U.S. If these foreign earnings were to be repatriated in the future, the related U.S. tax liability may be reduced by any foreign income taxes previously paid on these earnings and would generate foreign tax credits that would reduce the federal tax liability. As of December 31, 2014, the cumulative amount of earnings upon which U.S. income taxes have not been provided is approximately $436.6 million. Determination of the amount of unrecognized deferred tax liability related to these earnings is not practicable. Income before income taxes included income from domestic operations of $79.4 million, $61.0 million and $54.2 million for the year ended December 31, 2014, 2013 and 2012, respectively, and income from foreign operations of $75.8 million, $81.7 million and $100.7 million for the year ended December 31, 2014, 2013 and 2012, respectively.
Income Tax Audits:
The Company is under income tax audit by the U.S. Internal Revenue Service (“IRS”) for tax years 2009 through 2011. The Company has appealed the IRS tax examiner’s decision regarding transfer pricing for tax years 2009 and 2010 to the IRS appeals office, and that process remains on-going.
j2 Global is currently under income tax audit by the California Franchise Tax Board 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 Reserve Agency for tax years 2010 and 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	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity
	j2 Preferred Stock
	In connection with the December 31, 2013 reorganization of Ziff Davis, Inc. ("ZD Inc.") into Ziff Davis, LLC ("ZD LLC") and the Company's acquisition of all of the minority holders' equity interests in ZD Inc., the Company issued j2 Series A Preferred Stock ("j2 Series A Stock") and j2 Series B Preferred Stock ("j2 Series B Stock").
	j2 Series A Stock
	Each share of j2 Series A Stock has a stated value of $1,000 and the aggregate stated value of all shares of Series A Stock is $5,064,000. The j2 Series A Stock is not convertible into any other securities. In the event ZD LLC pays any dividends or distributions to the Company in respect of the Company’s membership interests in ZD LLC (subject to certain exceptions in respect of senior interests), holders of the j2 Series A Stock will be entitled to receive a dividend in the aggregate with respect to all j2 Series A Stock equal to 2.4449% of such ZD LLC dividend (but only to the extent such dividend and all other dividends paid in respect of the series A preferred stock does not exceed a compounded annual rate of 15% on the stated value of the j2 Series A Stock).
	The j2 Series A Stock has a liquidation preference over the j2 Series B Stock and a liquidation preference over j2 common stock in an amount up to, with respect to all shares of j2 Series A Stock, 2.4449% of the assets of ZD LLC and its subsidiaries legally available for distribution to the Company, after reduction in respect of certain senior interests (the "series A minority portion"), but in no event in an amount that exceeds the stated value of the j2 Series A Stock increased at a compounded annual rate of 15% (the "series A cap") and in no event in an amount that exceeds the lesser of the Company’s assets available for distribution and 2.4449% of the assets of ZD LLC and its subsidiaries legally available for distribution to the Company.
	On or after January 2, 2019, the j2 Series A Stock will be mandatorily redeemable by the Company upon the occurrence of certain contingent liquidity events such as a sale, initial public offering or spin-off transactions involving ZD, LLC. Any or all of the j2 Series A Stock is subject to redemption by the Company at its option at any time. If the redemption occurs in connection with certain sale, initial public offering or spin-off transactions involving ZD LLC, the redemption price will be equal to an allocable portion of the enterprise value of ZD, LLC implied by such transaction with respect to the series A minority portion and based on certain factors to be determined by the Company’s Board of Directors in its sole good faith judgment, but in no event in an amount that would exceed the series A cap. If not in connection with such a transaction, the redemption price will be the series A cap.
	j2 Series B Stock
	The j2 Series B Stock is not convertible into any other securities.  In the event ZD LLC pays any dividends or distributions to the Company in respect of the Company’s membership interests in ZD LLC (subject to certain exceptions in respect of senior interests and the j2 Series A Stock), holders of the j2 series B preferred stock will be entitled to receive a dividend in the aggregate with respect to all j2 Series B Stock equal to 9.5579% of such ZD LLC dividend.
	The j2 Series B Stock will have a liquidation preference junior to the liquidation preference of the j2 Series A Stock and a liquidation preference over the j2 common stock in an amount up to, with respect to all shares of j2 Series B Stock, 9.5579% of the assets of ZD LLC and its subsidiaries legally available for distribution to the Company, after reduction in respect of the j2 Series A Stock and certain other senior interests (the "series B minority portion"), but in no event in an amount that exceeds the lesser of the Company’s assets available for distribution and 9.5579% of the assets of ZD LLC and its subsidiaries legally available for distribution to the Company.
	On or after January 2, 2019, the j2 Series B Stock will be mandatorily redeemable by the Company upon the occurrence of certain contingent liquidity events such as a sale, initial public offering or spin-off transactions involving ZD LLC. Any or all of the j2 Series B Stock is subject to redemption by the Company at its option at any time. If the redemption occurs in connection with certain sale, initial public offering or spin-off transactions involving ZD LLC, the redemption price will be equal to an allocable portion of the enterprise value of ZD LLC implied by such transaction with respect to the series B minority portion and based on certain factors to be determined by the Board of Directors of the Company in its sole good faith judgment. Otherwise, the redemption price will be equal to the fair market value of such share as determined by the Company’s Board of Directors in its sole good faith judgment.
	Preferred Stock Exchange
	In November 2014, the Company provided holders of j2 Series A Stock and j2 Series B Stock an exchange right in which shares may be exchanged for j2 common stock. The exchange right associated with the shares of j2 Series A Stock were immediately exercisable at an exchange ratio of 20.4319 shares of j2 common stock per share of j2 Series A Stock (the "Series A Exchange Ratio"). Both holders of the j2 Series A Stock exercised this exchange right which resulted in the issuance of 235,665 shares of j2 common stock. The exchange right associated with the vested shares of the j2 Series B Stock is exercisable during specified exchange periods at an exchange ratio of 31.8094 shares of j2 common stock per share of j2 Series B Stock (the "Series B Exchange Ratio"). Holders of vested j2 Series B Stock exercised this exchange right which resulted in the issuance of 177,573 shares of j2 common stock during fiscal year 2014.
	In connection with the exercise of the exchange right and the resulting extinguishment of the Series A, the Company recorded the difference between the carrying value of the Series A and the fair value of the j2 common stock exchanged within retained earnings as a preferred stock dividend. In connection with the exercise of the exchange right associated with Series B, the Company recognized incremental fair value in the amount of $6.3 million and recorded additional share-based compensation in the amount of $0.2 million for the year ended December 31, 2014. The remaining amount of unrecognized incremental fair value will be recognized over the remaining service period.
	The Series B Exchange Ratio is adjusted in the event of a subdivision of the outstanding j2 common stock or j2 Series B Stock, a declaration of a dividend payable in shares of j2 common stock or j2 Series B Stock, a declaration of a dividend payable in a form other than shares in an amount that has a material effect on the value of shares of j2 common stock or j2 Series B Stock, a combination or consolidation of the outstanding j2 common stock or j2 Series B Stock into a lesser number of shares of j2 common stock or j2 Series B Stock, respectively, specified changes in control , a recapitalization, a reclassification, or a similar occurrence, the Company shall adjust the Series B Exchange Ratio as it deems appropriate in its sole discretion.
	Non-Controlling Interest
	Non-controlling interests represents equity interests in consolidated subsidiaries that are not attributable, either directly or indirectly, to j2 Global (i.e., minority interests). Non-controlling interests includes prior to the Reorganization described above in Note 9 - Mandatorily Redeemable Financial Instrument, the minority equity holders' proportionate share of the equity of Ziff Davis, Inc.
	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 on the consolidated statements of stockholders' equity. 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 to non-controlling interests is deducted from net income in the consolidated statements of income to determine net income attributable to the Company's common shareholders.
	In connection with the Reorganization described above in Note 9 - Mandatorily Redeemable Financial Instrument, the Company acquired all of the minority holders' equity interests in ZD, Inc. As a result, on December 31, 2013, ZD LLC became a wholly-owned subsidiary of j2 Global, Inc. and the non-controlling interest was no longer outstanding.
	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 j2 Global common stock through February 20, 2013 (see Note 22 - Subsequent Events - for a discussion regarding the extension of the share repurchase program through February 19, 2016). On February 15, 2012, the Company entered into a Rule 10b5-1 trading plan with a broker to facilitate the repurchase program. No shares were repurchased under the share repurchase program for the year ended December 31, 2014 and 2013. Cumulatively at December 31, 2014, 2.1 million shares were repurchased at an aggregate cost of $58.6 million (including an immaterial amount of commission fees).
	Periodically, participants in j2 Global’s stock plans surrender to the Company shares of j2 Global stock to pay the exercise price or to satisfy tax withholding obligations arising upon the exercise of stock options or the vesting of restricted stock. During the year ended December 31, 2014, the Company purchased 113,256 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
	On February 10, 2015, the Company's Board of Directors approved a quarterly cash dividend of $0.2925 per share of common stock payable on March 9, 2015 to all stockholders of record as of the close of business on February 23, 2015 (see Note 22 - Subsequent Events). Future dividends will be subject to Board approval.
	Treasury Stock
	On August 14, 2012, the Company retired all treasury stock (which resulted from prior stock repurchases) on its balance sheet. Accordingly, such treasury stock is zero as of December 31, 2014 and 2013.

Stock_Options_And_Employee_Sto

Stock Options And Employee Stock Purchase Plan	12 Months Ended
	Dec. 31, 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, 2007 Stock Plan and 2001 Employee Stock Purchase Plan (each is described below).
	(a)	Second Amended and Restated 1997 Stock Option Plan and 2007 Stock Plan
	In November 1997, j2 Global's Board of Directors adopted the j2 Global Communications, Inc. 1997 Stock Option Plan, which was twice amended and restated (the “1997 Plan”). The 1997 Plan terminated in 2007, although stock options and restricted stock issued under the 1997 Plan continue to be governed by it. 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.
	In October 2007, j2 Global's Board of Directors adopted the j2 Global, Inc. 2007 Stock Plan (the “2007 Plan”). The 2007 Plan provides for the granting of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock, restricted stock units and other share-based awards. The number of authorized shares of common stock that may be used for 2007 Plan purposes is 4,500,000. 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.
	At December 31, 2014, 2013 and 2012, options to purchase 618,437, 845,198 and 1,132,365 shares of common stock were exercisable under and outside of the 2007 Plan and the 1997 Plan combined, at weighted average exercise prices of $23.77,$20.35 and $21.94, respectively. Stock options generally expire after 10 years and vest over a 5-year period.
	All stock option grants are approved by “outside directors” within the meaning of Internal Revenue Code Section 162(m).
	Stock Options
	Stock option activity for the years ended December 31, 2014, 2013 and 2012 is summarized as follows:
		Number of Shares		Weighted-Average				Weighted-Average Remaining Contractual Life (In Years)		Aggregate
				Exercise Price						Intrinsic
										Value
	Options outstanding at December 31, 2011	2,087,695		$	20.99
	Granted	67,000		27.26
	Exercised	(357,234	)	15.81
	Canceled	(32,000	)	31.34
	Options outstanding at December 31, 2012	1,765,461		$	22.08
	Granted	—		—
	Exercised	(569,204	)	23.9
	Canceled	(20,600	)	21.79
	Options outstanding at December 31, 2013	1,175,657		$	21.08
	Granted	—		—
	Exercised	(433,008	)	15.7
	Canceled	(17,000	)	29.85
	Options outstanding at December 31, 2014	725,649		$	24.29			3.9		$27,362,157
	Exercisable at December 31, 2014	618,437		$	23.77			3.4		$23,642,294
	Vested and expected to vest at December 31, 2014	714,319		$	24.24			3.8		$26,975,686
	The per share weighted-average grant-date fair value of options granted during the year 2012 was $7.92.
	The total intrinsic values of options exercised during the years ended December 31, 2014, 2013 and 2012 were $14.6 million, $11.9 million and $4.5 million, respectively. The total fair value of options vested during the years ended December 31, 2014, 2013 and 2012 was $2.3 million, $3.1 million and $4.7 million, respectively.
	Cash received from options exercised under all share-based payment arrangements for the years ended December 31, 2014, 2013 and 2012 was $6.6 million, $13.6 million and $5.6 million, respectively. The actual tax benefit realized for the tax deductions from option exercises under the share-based payment arrangements totaled $5.2 million, $3.9 million and $1.6 million, respectively, for the years ended December 31, 2014, 2013 and 2012.
	The following table summarizes information concerning outstanding and exercisable options as of December 31, 2014:
			Options Outstanding								Exercisable Options
	Range of		Number Outstanding December 31, 2014		Weighted		Weighted				Number	Weighted
	Exercise Prices				Average		Average				Exercisable	Average
					Remaining		Exercise				December 31,	Exercise
					Contractual		Price				2014	Price
					Life
	$17.19		49,283		4.18 years		$	17.19			49,283	$	17.19
	18.77		128,200		0.67 years		18.77				128,200	18.77
	20.91		77,448		3.34 years		20.91				77,448	20.91
	21.67 - 21.88		74,420		4.21 years		31.69				74,420	21.69
	22.92		98,716		5.35 years		22.92				76,780	22.92
	23.11 - 28.52		75,382		4.95 years		26.87				44,382	27.06
	29.34		90,700		6.36 years		29.34				54,424	29.34
	29.53		22,000		7.17 years		29.53				7,000	29.53
	31.07		7,500		6.82 years		31.07				4,500	31.07
	32.45		102,000		2.59 years		32.45				102,000	32.45
	$17.19 - $32.45		725,649		3.88 years		$	24.29			618,437	$	23.77
	As discussed in Note 12 - Stockholders' Equity, the Company provided holders of j2 Series B Stock an exchange right in which j2 Series B Stock may be exchanged for j2 common stock during specified exchange periods. The Company determined that such exchange right represents a grant under the 2007 Plan for the year ended December 31, 2014, and accordingly, reduced the awards available under the 2007 Plan. At December 31, 2014, there were 163,309 additional shares underlying options, shares of restricted stock and other share-based awards available for grant under the 2007 Plan, and no additional shares available for grant under or outside of the 1997 Plan.
	As of December 31, 2014, there was $0.8 million of total unrecognized compensation expense related to nonvested share-based compensation options granted under the 2007 Plan and the 1997 Plan. That expense is expected to be recognized ratably over a weighted average period of 1.42 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 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 12.3%, 14.4% and 14.6% as of December 31, 2014, 2013 and 2012, respectively.
	The weighted-average fair values of stock options granted have been estimated utilizing the following assumptions:
		Year Ended December 31,
		2012
	Risk-free interest rate	1.10%
	Expected term (in years)	5.7
	Dividend yield	3.20%
	Expected volatility	41.60%
	Share-Based Compensation Expense
	The following table represents share-based compensation expense included in cost of revenues and operating expenses in the consolidated statements of income for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Year Ended December 31,
		2014			2013				2012
	Cost of revenues	$	345		$	756			$	844
Operating expenses:
Sales and marketing	1,944			1,855				1,543
Research, development and engineering	721			434				459
General and administrative	5,898			6,675				6,286
	$	8,908		$	9,720			$	9,132
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 granted 265,601, 729,137 and 390,210 shares of restricted stock and restricted units during the years ended December 31, 2014, 2013 and 2012, respectively, and recognized $7.4 million, $7.1 million and $5.2 million, respectively of related compensation expense. As of December 31, 2014, the Company had unrecognized share-based compensation cost of $24.1 million associated with these awards. This cost is expected to be recognized over a weighted-average period of 3.0 years for awards and 3.5 years for units. The total fair value of restricted stock and restricted stock units vested during the years ended December 31, 2014, 2013 and 2012 was $8.5 million, $6.4 million and $4.3 million, respectively. The actual tax benefit realized for the tax deductions from the vesting of restricted stock awards and units totaled $5.0 million, $1.4 million and $0.3 million, respectively, for the years ended December 31, 2014, 2013 and 2012. In accordance with ASC 718, share-based compensation is recognized on dividends paid related to nonvested restricted stock not expected to vest, which amounted to approximately $0.1 million for the year ended December 31, 2014.
Restricted stock award activity for the years ended December 31, 2014 and 2013 is set forth below:
	Shares		Weighted-Average
			Grant-Date
			Fair Value
Nonvested at January 1, 2013	828,475		$	23.08
Granted	690,762		13.57
Vested	(296,966	)	21.46
Canceled	(43,900	)	24.46
Nonvested at December 31, 2013	1,178,371		$	17.86
Granted	226,864		45.66
Vested	(546,115	)	15.63
Canceled	(45,070	)	35.55
Nonvested at December 31, 2014	814,050		$	26.57
Restricted stock unit activity for the years ended December 31, 2014 and 2013 is set forth below:
	Number of		Weighted-Average		Aggregate
	Shares		Remaining		Intrinsic
			Contractual		Value
			Life (in Years)
Outstanding at January 1, 2013	115,466
Granted	38,375
Vested	(11,116	)
Canceled	(33,000	)
Outstanding at December 31, 2013	109,725
Granted	38,737
Vested	(19,598	)
Canceled	(25,940	)
Outstanding at December 31, 2014	102,924		2.1		$	6,381,288
Vested and expected to vest at December 31, 2014	79,445		1.9		$	4,925,584
Ziff Davis, Inc. Equity Incentive Plan
In November 2012, Ziff Davis, Inc. ("ZD, Inc.") established the Ziff Davis, Inc. 2012 Equity Incentive Plan (the "Ziff Davis Plan"), providing incentives to selected directors, officers, employees and consultants. The Ziff Davis Plan provides for the granting of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock, restricted stock units and other share-based awards. The number of authorized shares of common stock that may be used for the Ziff Davis Plan purposes is 15,000,000. In addition, certain stockholders have put rights under certain circumstances in which the stockholder may elect to cause ZD, Inc. to purchase any or all of the shares of common stock (to the extent vested pursuant to the terms of the Ziff Davis Plan) and preferred stock owned by such stockholder. ZD, Inc. also has the option to call under certain circumstances the common stock issued pursuant to the Ziff Davis Plan (to the extent vested pursuant to the terms of the Ziff Davis Plan) and shares of preferred stock. Management has determined that the circumstances in which the put right held by the stockholder is exercisable are within the control of the Company. Accordingly, management determined that liability classification is not required.
ZD, Inc. granted 13,035,000 shares of restricted stock during the year ended December 31, 2013 to its senior staff pursuant to the Ziff Davis Plan, which shares vest evenly over a 5 year period. Based upon the terms of the Ziff Davis Series A Stock discussed in Note 9 - Mandatorily Redeemable Financial Instrument, the Company determined at the relevant grant date that the fair value of the ZD, Inc. restricted stock was zero. Accordingly, no compensation expense was recorded for the ZD, Inc. restricted stock for the year ended December 31, 2013.
In connection with the December 31, 2013 reorganization of ZD, Inc. into Ziff Davis, LLC, the Company acquired all of the minority holders' equity interests in ZD, Inc. As a result, on December 31, 2013, Ziff Davis LLC became a wholly-owned subsidiary of j2 Global, Inc. No further securities are issuable under the Ziff Davis Plan.
Employee Stock Purchase Plan
In May of 2001, j2 Global established the j2 Global, Inc. 2001 Employee Stock Purchase Plan, as amended (the “Purchase Plan”), which provides for the issuance of a maximum of 2,000,000 shares of 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. During 2014, 2013 and 2012, 5,735, 5,402 and 5,797 shares, respectively were purchased under the Purchase Plan at price ranging from $51.38 to $43.08 per share during 2014. As of December 31, 2014, 1,634,464 shares were available under the Purchase Plan for future issuance.

Defined_Contribution_401k_Savi

Defined Contribution 401(k) Savings Plan	12 Months Ended
	Dec. 31, 2014
Defined Contribution 401(k) Savings Plan [Abstract]
Pension and Other Postretirement Benefits Disclosure [Text Block]	Defined Contribution 401(k) Savings Plan
	j2 Global has two significant 401(k) Savings Plans covering the employees of j2 Global, Inc. and its consolidated subsidiary Ziff Davis, Inc. Eligible employees may contribute through payroll deductions. The Company may make annual contributions to the j2 Global 401(k) Savings Plan at the discretion of j2 Global's Board of Directors and employees within the Ziff Davis, Inc. 401(k) Savings Plan receive 50% of the first 4% of eligible compensation with a maximum of 2% of salary. For the years ended December 31, 2014 and 2013, the Company accrued $0.2 million and $0.1 million, respectively, for contributions to the 401(k) Savings Plans.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 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):
		Year Ended December 31,
		2014			2013			2012
	Numerator for basic and diluted net income per common share:
	Net income attributable to j2 Global, Inc. common shareholders	$	124,336		$	107,522		$	121,580
	Net income available to participating securities (a)	(2,590		)	(2,105		)	(2,075		)
	Net income available to j2 Global, Inc. common shareholders	121,746			105,417			119,505
	Denominator:
	Weighted-average outstanding shares of common stock	46,778,015			45,548,767			45,459,712
	Dilutive effect of:
	Equity incentive plans	328,523			591,252			321,946
	Common stock and common stock equivalents	47,106,538			46,140,019			45,781,658
	Net income per share:
	Basic	$	2.6		$	2.31		$	2.63
	Diluted	$	2.58		$	2.28		$	2.61
	(a)	Represents unvested share-based payment awards that contain certain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid).
	For the years ended December 31, 2014, 2013 and 2012, there were zero, zero and 527,319 options outstanding, respectively, which were excluded from the computation of diluted earnings per share because the exercise prices were greater than the average market price of the common shares.

Geographic_Information

Geographic Information	12 Months Ended
	Dec. 31, 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 2 - Basis of Presentation and Summary of Significant Policies.
	Information on reportable segments and reconciliation to consolidated income from operations is as follows (in thousands):
		Years Ended December 31,
		2014			2013			2012
	Revenue by segment:
	Business Cloud Services	$	431,475		$	390,104		$	361,684
	Digital Media	167,814			131,146			9,712
	Elimination of inter-segment revenues	(259		)	(449		)	—
	Total revenue	599,030			520,801			371,396
	Direct costs by segment(1):
	Business Cloud Services	241,592			191,169			174,324
	Digital Media	137,321			124,413			6,823
	Direct costs by segment(1):	378,913			315,582			181,147
	Business Cloud Services operating income	189,883			198,935			187,360
	Digital Media operating income	30,493			6,733			2,889
	Segment operating income	220,376			205,668			190,249
	Global operating costs(2)	34,170			30,245			28,087
	Income from operations	$	186,206		$	175,423		$	162,162
	(1) Direct costs for each segment include cost of revenue and other operating expenses that are directly attributable to the segment such as employee compensation expense, local sales and marketing expenses, engineering and operations, 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.
		2014			2013
	Assets:
	Business Cloud Services	$	883,587		$	818,722
	Digital Media	378,381			333,286
	Total assets from reportable segments	1,261,968			1,152,008
	Corporate	443,234			1,781
	Total assets	$	1,705,202		$	1,153,789
		2014			2013			2012
	Capital expenditures:
	Business Cloud Services	$	6,639		$	10,979		$	4,240
	Digital Media	4,920			6,635			380
	Total from reportable segments	$	11,559		$	17,614		$	4,620
	Corporate	270			1,013			441
	Total capital expenditures	$	11,829		$	18,627		$	5,061
	Depreciation and amortization:
	Business Cloud Services	$	39,699		$	24,148		$	20,473
	Digital Media	22,483			14,963			1,167
	Total from reportable segments	62,182			39,111			21,640
	Corporate	771			677			512
	Total depreciation and amortization	$	62,953		$	39,788		$	22,152
	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).
		Year Ended December 31,
		2014			2013			2012
	Revenues:
	United States	$	403,279		$	369,507		$	233,585
	Canada	70,434			73,130			79,656
	Ireland	42,979			41,398			41,248
	All other countries	82,338			36,766			16,907
	Total	$	599,030		$	520,801		$	371,396
		December 31,			December 31,
		2014			2013
	Long-lived assets:
	United States	$	216,099		$	170,247
	All other countries	101,107			51,675
	Total	$	317,206		$	221,922

Condensed_Consolidating_Financ

Condensed Consolidating Financials (Notes)	12 Months Ended
	Dec. 31, 2014
Condensed Consolidating Financials [Abstract]
Condensed Financial Statements [Text Block]	Consolidating Financial Statements
	In connection with the June 2014 Convertible Note issuance, j2 Global, Inc. entered into a supplemental indenture related to the Senior Notes pursuant to which it fully and unconditionally guaranteed, on an unsecured basis, the full and punctual payment of the Senior Notes issued by its wholly owned subsidiary, j2 Cloud Services, Inc. j2 Cloud Services, Inc. is subject to restrictions on dividends in its existing indenture with respect to the Senior Notes. 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. AND SUBSIDIARIES
	CONSOLIDATED BALANCE SHEET
	31-Dec-14
	(In thousands except share and per share data)
	BALANCE SHEET	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	ASSETS
	Cash and cash equivalents	226,790			36,810			170,063			—			433,663
	Short-term investments	47,880			48,261			65			—			96,206
	Accounts receivable, net	—			11,167			80,532			—			91,699
	Prepaid expenses and other current assets	776			12,689			9,137			—			22,602
	Deferred income taxes	1,271			—			742			—			2,013
	Intercompany receivable	110,000			74,938			1,428			(186,366		)	—
	Total current assets	386,717			183,865			261,967			(186,366		)	646,183
	Long-term investments	55,452			5,056			—			—			60,508
	Property and equipment, net	—			8,011			30,206			—			38,217
	Trade names, net	—			10,231			95,320			—			105,551
	Patent and patent licenses, net	—			886			24,041			—			24,927
	Customer relationships, net	—			2,206			161,560			—			163,766
	Goodwill	—			52,131			583,544			—			635,675
	Other purchased intangibles, net	—			4,276			13,280			—			17,556
	Investment in subsidiaries	826,289			900,681			8,716			(1,735,686		)	—
	Other assets	9,328			1,368			2,123			—			12,819
	Total assets	$	1,277,786		$	1,168,711		$	1,180,757		$	(1,922,052	)	$	1,705,202
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	2,834			28,414			64,062			—			95,310
	Deferred revenue	—			23,091			40,366			—			63,457
	Deferred income taxes	—			—			342			—			342
	Capital lease, current	—			—			258			—			258
	Intercompany payable	76,366			—			110,000			(186,366		)	—
	Total current liabilities	79,200			51,505			215,028			(186,366		)	159,367
	Long-term debt	347,163			246,187			—			—			593,350
	Capital lease, non-current	—			—			141			—			141
	Liability for uncertain tax positions	—			37,551			—			—			37,551
	Deferred income taxes	21,728			(1,837		)	42,069			—			61,960
	Deferred revenue, non-current	—			8,187			1,995			—			10,182
	Other long-term liabilities	744			829			20,843			—			22,416
	Total liabilities	448,835			342,422			280,076			(186,366		)	884,967
	Common stock, $0.01 par value	474			—			—			—			474
	Additional paid-in capital	273,304			232,340			421,676			(654,016		)	273,304
	Retained earnings	555,158			584,591			495,505			(1,081,670		)	553,584
	Accumulated other comprehensive income (loss)	15			9,358			(16,500		)	—			(7,127		)
	Total stockholders’ equity	828,951			826,289			900,681			(1,735,686		)	820,235
	Total liabilities and stockholders’ equity	$	1,277,786		$	1,168,711		$	1,180,757		$	(1,922,052	)	$	1,705,202
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED BALANCE SHEET
	31-Dec-13
	(In thousands except share and per share data)
	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	—			741,843			—			(741,843		)	—
Deferred income taxes	—			202			1,643			—			1,845
Other assets	—			1,578			1,835			—			3,413
Total assets	$	—		$	1,061,778		$	838,287		$	(746,276	)	$	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	—			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, non-current	—			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	—			216,872			326,983			(326,983		)	216,872
Retained earnings	—			482,540			417,136			(414,826		)	484,850
Accumulated other comprehensive loss	—			6,545			(2,310		)	—			4,235
Total stockholders’ equity	—			706,418			741,843			(741,843		)	706,418
Total liabilities and stockholders’ equity	$	—		$	1,061,778		$	838,287		$	(746,276	)	$	1,153,789
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF INCOME
Year Ended December 31, 2014
(In thousands, except share and per share data)
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	227,860		$	412,217		$	(41,047	)	$	599,030
Cost of revenues	—			51,391			95,386			(40,788		)	105,989
Gross profit	—			176,469			316,831			(259		)	493,041
Operating expenses:
Sales and marketing	—			36,414			105,812			(259		)	141,967
Research, development and engineering	—			14,055			16,625			—			30,680
General and administrative	6,401			30,300			97,487			—			134,188
Total operating expenses	6,401			80,769			219,924			(259		)	306,835
Income from operations	(6,401		)	95,700			96,907			—			186,206
Equity earnings in Subsidiaries	135,838			77,051			—			(212,889		)	—
Interest expense (income), net	10,442			20,478			284			—			31,204
Other expense (income), net	(23		)	141			(283		)	—			(165		)
Income before income taxes	119,018			152,132			96,906			(212,889		)	155,167
Income tax expense	(6,309		)	16,294			19,855			—			29,840
Net income	125,327			135,838			77,051			(212,889		)	125,327
Less net loss attributable to noncontrolling interest	—			—			—			—			—
Less extinguishment of Series A preferred stock	(991		)	—			—			—			(991		)
Net income attributable to j2 Global, Inc. common shareholders	$	124,336		$	135,838		$	77,051		$	(212,889	)	$	124,336
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF INCOME
Year Ended December 31, 2013
(In thousands, except share and per share data)
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	255,413		$	369,079		$	(103,691	)	$	520,801
Cost of revenues	—			84,655			105,480			(103,242		)	86,893
Gross profit	—			170,758			263,599			(449		)	433,908
Operating expenses:
Sales and marketing	—			41,555			90,211			(449		)	131,317
Research, development and engineering	—			12,977			12,508			—			25,485
General and administrative	—			37,634			64,049			—			101,683
Total operating expenses	—			92,166			166,768			(449		)	258,485
Income from operations	—			78,592			96,831			—			175,423
Equity earnings in Subsidiaries	—			61,551			—			(61,551		)	—
Interest expense (income), net	—			9,292			11,962			—			21,254
Other expense (income), net	—			(369		)	11,841			—			11,472
Income before income taxes	—			131,220			73,028			(61,551		)	142,697
Income tax expense	—			23,698			11,477			—			35,175
Net income	—			107,522			61,551			(61,551		)	107,522
Less net loss attributable to noncontrolling interest	—			—			—			—			—
Net income attributable to j2 Global, Inc. common shareholders	$	—		$	107,522		$	61,551		$	(61,551	)	$	107,522
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF INCOME
Year Ended December 31, 2012
(In thousands, except share and per share data)
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	222,203		$	206,045		$	(56,852	)	$	371,396
Cost of revenues	—			85,826			38,039			(56,852		)	67,013
Gross profit	—			136,377			168,006			—			304,383
Operating expenses:
Sales and marketing	—			35,677			27,148			—			62,825
Research, development and engineering	—			11,878			6,746			—			18,624
General and administrative	—			35,558			25,214			—			60,772
Total operating expenses	—			83,113			59,108			—			142,221
Income from operations	—			53,264			108,898			—			162,162
Equity earnings in Subsidiaries	—			91,539			—			(91,539		)	—
Interest expense (income), net	—			3,911			3,739			—			7,650
Other expense (income), net	—			(168		)	(242		)	—			(410		)
Income before income taxes	—			141,060			105,401			(91,539		)	154,922
Income tax expense	—			19,480			13,779			—			33,259
Net income	—			121,580			91,622			(91,539		)	121,663
Less net loss attributable to noncontrolling interest	—			—			83			—			83
Net income attributable to j2 Global, Inc. common shareholders	$	—		$	121,580		$	91,539		$	(91,539	)	$	121,580
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Year Ended December 31, 2014
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	125,327		$	135,838		$	77,051		$	(212,889	)	$	125,327
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			(478		)	(14,216		)	—			(14,694		)
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	15			3,307			10			—			3,332
Other comprehensive income (loss), net of tax	15			2,829			(14,206		)	—			(11,362		)
Comprehensive income (loss)	$	125,342		$	138,667		$	62,845		$	(212,889	)	$	113,965
Net loss attributable to noncontrolling interest	—			—			—			—			—
Comprehensive income attributable to j2 Global, Inc.	$	125,342		$	138,667		$	62,845		$	(212,889	)	$	113,965
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Year Ended December 31, 2013
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	—		$	107,522		$	61,551		$	(61,551	)	$	107,522
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			(43		)	121			—			78
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			4,249			(4		)	—			4,245
Other comprehensive income, net of tax	—			4,206			117			—			4,323
Comprehensive income	$	—		$	111,728		$	61,668		$	(61,551	)	$	111,845
Net loss attributable to noncontrolling interest	—			—			—			—			—
Comprehensive income attributable to j2 Global, Inc.	$	—		$	111,728		$	61,668		$	(61,551	)	$	111,845
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Year Ended December 31, 2012
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	—		$	121,580		$	91,622		$	(91,539	)	$	121,663
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			521			914			—			1,435
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			1,960			(6		)	—			1,954
Other comprehensive income, net of tax	—			2,481			908			—			3,389
Comprehensive income	—			124,061			92,530			(91,539		)	125,052
Net loss attributable to noncontrolling interest	—			—			83			—			83
Comprehensive income attributable to j2 Global, Inc.	$	—		$	124,061		$	92,447		$	(91,539	)	$	124,969
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CASH FLOWS
Year Ended December 31, 2014
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Cash flows from operating activities:
Net income	$	125,327		$	135,838		$	77,051		$	(212,889	)	$	125,327
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	—			6,047			56,906			—			62,953
Accretion and amortization of discount and premium of investments	392			722			220			—			1,334
Amortization of financing costs and discounts	4,297			748			—			—			5,045
Share-based compensation	2,353			5,325			1,230			—			8,908
Excess tax benefits from share-based compensation	(86		)	(4,803		)	(623		)	—			(5,512		)
Provision for doubtful accounts	—			2,114			2,588			—			4,702
Equity earnings in subsidiaries	(135,838		)	(77,051		)	—			212,889			—
Deferred income taxes	(1,392		)	(5,767		)	(2,874		)	—			(10,033		)
(Gain) Loss on disposal of fixed assets	—			—			—			—			—
(Gain) loss on available-for-sale investment	26			(58		)	(58		)				(90		)
Changes in assets and liabilities, net of effects of business combinations:
Decrease (increase) in:
Accounts receivable	—			(2,490		)	(8,588		)	—			(11,078		)
Prepaid expenses and other current assets	(776		)	(8,757		)	6,321			—			(3,212		)
Other assets	—			—			(42		)	—			(42		)
Increase (decrease) in:
Accounts payable and accrued expenses	2,835			(1,173		)	(7,109		)	—			(5,447		)
Income taxes payable	2,055			17,384			(8,642		)	—			10,797
Deferred revenue	—			(2,067		)	1,356			—			(711		)
Liability for uncertain tax positions	—			(6,311		)	(2		)	—			(6,313		)
Other long-term liabilities	742			(157		)	18			—			603
Net cash (used in) provided by operating activities	(65		)	59,544			117,752			—			177,231
Cash flows from investing activities:
Maturity of certificates of deposit	—			8,210			6,310			—			14,520
Purchase of certificates of deposit	—			—			(65		)	—			(65		)
Sales of available-for-sale investments	40,211			53,563			16,589			—			110,363
Purchase of available-for-sale investments	(81,061		)	(57,391		)	—			—			(138,452		)
Purchases of property and equipment	—			(2,866		)	(8,963		)	—			(11,829		)
Proceeds from sale of assets	—			608			—			—			608
Acquisition of businesses, net of cash received	—			(2,083		)	(243,195		)	—			(245,278		)
Purchases of intangible assets	—			(2,949		)	(2,387		)	—			(5,336		)
Investment in subsidiaries	—			(23,821		)	—			23,821			—
Net cash (used in) provided by investing activities	(40,850		)	(26,729		)	(231,711		)	23,821			(275,469		)
Cash flows from financing activities:
Issuance of long-term debt	402,500			—			—			—			402,500
Debt issuance cost	(11,991		)	—			—			—			(11,991		)
Repurchases of common and restricted stock	(930		)	(4,733		)	—			—			(5,663		)
Issuance of common stock under employee stock purchase plan	142			123			—			—			265
Exercise of stock options	1,374			5,193			54			—			6,621
Mandatorily redeemable preferred stock	—			—			—			—			—
Dividends paid	(26,967		)	(25,302		)	—			—			(52,269		)
Excess tax benefits from share-based compensation	86			4,803			623			—			5,512
Deferred payments for acquisitions	—			—			(16,512		)	—			(16,512		)
Other	—			—			(933		)	—			(933		)
Intercompany	(96,509		)	(10,495		)	130,825			(23,821		)	—
Net cash (used in) provided by financing activities	267,705			(30,411		)	114,057			(23,821		)	327,530
Effect of exchange rate changes on cash and cash equivalents	—			—			(3,430		)	—			(3,430		)
Net change in cash and cash equivalents	226,790			2,404			(3,332		)	—			225,862
Cash and cash equivalents at beginning of period	—			34,406			173,395			—			207,801
Cash and cash equivalents at end of period	$	226,790		$	36,810		$	170,063		$	—		$	433,663
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CASH FLOWS
Year Ended December 31, 2013
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Cash flows from operating activities:
Net income	$	—		$	107,522		$	61,551		$	(61,551	)	$	107,522
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	—			9,201			30,587			—			39,788
Accretion and amortization of discount and premium of investments	—			1,273			523			—			1,796
Amortization of financing costs and discounts	—			613			—			—			613
Share-based compensation	—			9,720			—			—			9,720
Excess tax benefits from share-based compensation	—			(2,695		)	—			—			(2,695		)
Provision for doubtful accounts	—			1,219			1,916			—			3,135
Equity earnings in subsidiaries	—			(61,551		)	—			61,551			—
Deferred income taxes	—			(495		)	745			—			250
(Gain) Loss on disposal of fixed assets	—			—			8			—			8
(Gain) loss on available-for-sale investment	—			(51		)	117						66
Loss on extinguishment of debt and related interest expense	—			—			14,437			—			14,437
Changes in assets and liabilities, net of effects of business combinations:
Decrease (increase) in:
Accounts receivable	—			(1,656		)	(7,932		)	—			(9,588		)
Prepaid expenses and other current assets	—			784			(635		)	—			149
Other assets	—			(57		)	225			—			168
Increase (decrease) in:
Accounts payable and accrued expenses	—			(124		)	9,250			—			9,126
Income taxes payable	—			(923		)	1,590			—			667
Deferred revenue	—			13,415			(1,047		)	—			12,368
Liability for uncertain tax positions	—			6,184			2			—			6,186
Other long-term liabilities	—			(88		)	(304		)	—			(392		)
Net cash provided by operating activities	—			82,291			111,033			—			193,324
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	—			124,745			15,381			—			140,126
Purchase of available-for-sale investments	—			(149,748		)	(19,153		)	—			(168,901		)
Purchases of property and equipment	—			(6,223		)	(12,404		)	—			(18,627		)
Proceeds from sale of assets	—			1			—			—			1
Acquisition of businesses, net of cash received	—			(4,043		)	(122,298		)	—			(126,341		)
Purchases of intangible assets	—			(3,034		)	(11,166		)	—			(14,200		)
Investment in subsidiaries	—			(14,920		)	—			14,920			—
Other	—			3,281			(3,281		)	—			—
Net cash (used in) provided by investing activities	—			(36,046		)	(146,272		)	14,920			(167,398		)
Cash flows from financing activities:
Issuance of long-term debt	—			—			—			—			—
Debt issuance costs	—			(47		)	—			—			(47		)
Repurchases of common stock and restricted stock	—			(4,587		)	—			—			(4,587		)
Issuance of common stock under employee stock purchase plan	—			213			—			—			213
Exercise of stock options	—			13,604			—			—			13,604
Mandatorily redeemable preferred stock	—			—			—						—
Dividends paid	—			(45,134		)	—			—			(45,134		)
Excess tax benefits from share-based compensation	—			2,695			—			—			2,695
Deferred payments for acquisitions	—			—			—			—			—
Other	—			—			(2,437		)	—			(2,437		)
Intercompany	—			(55,295		)	70,215			(14,920		)	—
Net cash (used in) provided by financing activities	—			(88,551		)	67,778			(14,920		)	(35,693		)
Effect of exchange rate changes on cash and cash equivalents	—			—			(1,112		)	—			(1,112		)
Net change in cash and cash equivalents	—			(42,306		)	31,427			—			(10,879		)
Cash and cash equivalents at beginning of period	—			76,712			141,968			—			218,680
Cash and cash equivalents at end of period	$	—		$	34,406		$	173,395		$	—		$	207,801
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CASH FLOWS
Year Ended December 31, 2012
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Cash flows from operating activities:
Net income	$	—		$	121,580		$	91,622		$	(91,539	)	$	121,663
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	—			8,590			13,574			—			22,164
Accretion and amortization of discount and premium of investments	—			1,461			142			—			1,603
Amortization of financing costs and discounts	—			249			—			—			249
Share-based compensation	—			9,132			—			—			9,132
Excess tax benefits from share-based compensation	—			(961		)	—			—			(961		)
Provision for doubtful accounts	—			293			3,996			—			4,289
Equity earnings in subsidiaries	—			(91,539		)	—			91,539			—
Deferred income taxes	—			4,839			(3,689		)	—			1,150
(Gain) Loss on disposal of fixed assets	—			54			—			—			54
(Gain) loss on available-for-sale investment	—			(266		)	—						(266		)
Loss on extinguishment of debt and related interest expense	—			—			—			—			—
Changes in assets and liabilities, net of effects of business combinations:
Decrease (increase) in:
Accounts receivable	—			(822		)	(4,595		)	—			(5,417		)
Prepaid expenses and other current assets	—			(1,265		)	(763		)	—			(2,028		)
Other assets	—			123			(366		)				(243		)
Increase (decrease) in:
Accounts payable and accrued expenses	—			10,599			(5,461		)	—			5,138
Income taxes payable	—			2,193			1,946			—			4,139
Deferred revenue	—			878			734			—			1,612
Liability for uncertain tax positions	—			7,601			—			—			7,601
Other long-term liabilities	—			99			(67		)	—			32
Net cash provided by operating activities	—			72,838			97,073			—			169,911
Cash flows from investing activities:
Maturity of certificates of deposit	—			8,000			—			—			8,000
Purchase of certificates of deposit	—			(22,106		)	(12,567		)	—			(34,673		)
Sales of available-for-sale investments	—			138,709			—			—			138,709
Purchase of available-for-sale investments	—			(139,087		)	(12,902		)	—			(151,989		)
Purchases of property and equipment	—			(2,677		)	(2,384		)	—			(5,061		)
Proceeds from sale of assets	—			136			20			—			156
Acquisition of businesses, net of cash received	—			(1,811		)	(196,530		)	—			(198,341		)
Purchases of intangible assets	—			(4,433		)	(1,862		)	—			(6,295		)
Investment in subsidiaries	—			(171,562		)	—			171,562			—
Other	—			—			—			—			—
Net cash (used in) provided by investing activities	—			(194,831		)	(226,225		)	171,562			(249,494		)
Cash flows from financing activities:
Issuance of long-term debt	—			245,000			—			—			245,000
Debt issuance cost	—			(1,384		)	—			—			(1,384		)
Repurchases of common and restricted stock	—			(60,282		)	—			—			(60,282		)
Issuance of common stock under employee stock purchase plan	—			157			—			—			157
Exercise of stock options	—			5,646			—						5,646
Mandatorily redeemable preferred stock	—			—			8,557			—			8,557
Dividends paid	—			(40,263		)	—			—			(40,263		)
Excess tax benefits from share-based compensation	—			961			—			—			961
Deferred payments for acquisitions	—			—			—			—			—
Other	—			—			—			—			—
Intercompany	—			3,746			167,816			(171,562		)	—
Net cash (used in) provided by financing activities	—			153,581			176,373			(171,562		)	158,392
Effect of exchange rate changes on cash and cash equivalents	—			—			512			—			512
Net change in cash and cash equivalents	—			31,588			47,733			—			79,321
Cash and cash equivalents at beginning of period	—			45,124			94,235			—			139,359
Cash and cash equivalents at end of period	$	—		$	76,712		$	141,968		$	—		$	218,680

Supplemental_Cash_Flows_Inform

Supplemental Cash Flows Information	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flows Information [Abstract]
Cash Flow, Supplemental Disclosures [Text Block]	Supplemental Cash Flows Information
	Cash paid for interest during the years ended December 31, 2014, 2013 and 2012 was $26.6 million, $21.1 million and $0.4 million, respectively, substantially all of which related to interest on outstanding debt, foreign taxes and interest on settled acquisition holdback.
	Cash paid for income taxes net of refunds received was $49.5 million, $28.3 million and $20.4 million during the years ended December 31, 2014, 2013 and 2012, respectively.
	The Company acquired property and equipment for $0.6 million, $0.9 million and $0.6 million during the years ended December 31, 2014, 2013 and 2012, respectively, which had not been yet paid at the end of each such year.
	During the years ended December 31, 2014, 2013 and 2012, j2 Global recorded the tax benefit from the exercise of stock options and restricted stock as a reduction of its income tax liability of $10.2 million, $7.1 million and $3.3 million, respectively.
	Included in the purchase prices of the acquisitions closed during the years ended December 31, 2014, 2013 and 2012 were contingent holdbacks of $45.3 million, $7.0 million and $2.5 million, respectively. These are recorded as current accrued expenses or other long-term liabilities with a maturity equal to the expected holdback release date.
	In connection with the December 31, 2013 reorganization of Ziff Davis, Inc. into Ziff Davis, LLC, the Company acquired, in a non-cash transaction, all of the minority holders' equity interests in ZD, Inc., which included shares of Ziff Davis, Inc. Series A Preferred Stock and Ziff Davis, Inc. common stock. In this transaction, the Company issued the minority holders an aggregate fair market value of j2 common stock, j2 Series A Preferred Stock and j2 Series B Preferred Stock equal to the fair market value of the minority holders' shares in ZD, Inc. (see Note 12 - Stockholders' Equity). As a result of this reorganization, on December 31, 2013, the Ziff Davis Series A Preferred Stock and Ziff Davis common stock was extinguished, resulting in loss on extinguishment of debt and related interest expense of $14.4 million within the consolidated statement of income, in accordance with ASC 480, Distinguishing Liabilities from Equity.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income (Notes)	12 Months Ended
	Dec. 31, 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 years ended December 31, 2014 and 2013 (in thousands):
		Unrealized Gains (Losses) on Investments				Foreign Currency Translation				Total
	Balance as of January 1, 2013	$	1,811			$	(1,899	)		$	(88	)
	Other comprehensive income (loss) before reclassifications	4,236				(10		)		4,226
	Amounts reclassified from accumulated other comprehensive income	9				88				97
	Net increase in other comprehensive income	4,245				78				4,323
	Balance as of December 31, 2013	$	6,056			$	(1,821	)		$	4,235
	Other comprehensive income (loss) before reclassifications	3,346				(14,694		)		(11,348		)
	Amounts reclassified from accumulated other comprehensive income	(14		)		—				(14		)
	Net increase (decrease) in other comprehensive income	3,332				(14,694		)		(11,362		)
	Balance as of December 31, 2014	$	9,388			$	(16,515	)		$	(7,127	)
	The following table provides details about reclassifications out of accumulated other comprehensive income for the years ended December 31, 2014 and 2013 (in thousands):
	Details about Accumulated Other Comprehensive Income Components		Amount Reclassified from Accumulated Other Comprehensive Income								Affected Line Item in the Statement of Income
			Year Ended December 31, 2013				Year Ended December 31, 2014
	Cumulative translation adjustment		$	116			$	—			Other expense (income), net
			116				—				Total, before income taxes
			(28		)		—				Income tax expense (benefit)
			$	88			$	—			Total, net of tax
	Unrealized gain (loss) on available-for-sale investments		$	14			$	(23	)		Other expense (income), net
			14				(23		)		Total, before income taxes
			(5		)		9				Income tax expense (benefit)
			9				(14		)		Total, net of tax
	Total reclassifications for the period		$	97			$	(14	)		Total, net of tax

Quarterly_Results

Quarterly Results	12 Months Ended
	Dec. 31, 2014
Quarterly Results [Abstract]
Quarterly Financial Information [Text Block]	Quarterly Results (unaudited)
	The following tables contain selected unaudited statement of income information for each quarter of 2014 and 2013 (in thousands, except share and per share data). j2 Global believes that the following information reflects all normal recurring adjustments necessary for a fair presentation of the information for the periods presented. The operating results for any quarter are not necessarily indicative of results for any future period.
		Year Ended December 31, 2014
		Fourth		Third		Second		First
		Quarter		Quarter		Quarter		Quarter
	Revenues	$	167,144	$	153,018	$	144,744	$	134,124
	Gross profit		138,145		124,974		119,186		110,736
	Net income		32,754		28,759		35,049		28,765
	Net income attributable to j2 Global, Inc. common shareholders		31,763		28,759		35,049		28,765
	Net income per common share:
	Basic	$	0.66	$	0.6	$	0.73	$	0.61
	Diluted	$	0.66	$	0.6	$	0.73	$	0.6
	Weighted average shares outstanding
	Basic		47,146,503		46,845,477		46,745,596		46,365,158
	Diluted		47,468,841		47,163,912		47,067,767		46,765,732
		Year Ended December 31, 2013
		Fourth		Third		Second		First
		Quarter		Quarter		Quarter		Quarter
	Revenues	$	138,035	$	127,788	$	141,361	$	113,617
	Gross profit		115,857		105,987		118,682		93,382
	Net income		20,754		27,806		36,040		22,922
	Net income attributable to j2 Global, Inc. common shareholders		20,754		27,806		36,040		22,922
	Net income per common share:
	Basic	$	0.45	$	0.6	$	0.78	$	0.5
	Diluted	$	0.44	$	0.59	$	0.77	$	0.49
	Weighted average shares outstanding
	Basic		45,867,769		45,729,171		45,428,230		45,160,140
	Diluted		46,382,363		46,291,631		46,018,245		45,668,167

Unrestricted_Subsidiaries_Note

Unrestricted Subsidiaries (Notes)	12 Months Ended
	Dec. 31, 2014
Unrestricted Subsidiaries [Abstract]
Unrestricted Subsidiaries [Text Block]	Unrestricted Subsidiaries (unaudited)
	As of December 31, 2013, 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 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 consolidated financial position of the Unrestricted Subsidiaries as of December 31, 2014 is as follows (in thousands):
		December 31, 2014
	ASSETS
	Cash and cash equivalents	$	27,944
	Accounts receivable	57,005
	Prepaid expenses and other current assets	2,986
	Deferred income taxes	5,292
	Total current assets	93,227
	Property and equipment, net	12,834
	Trade names, net	70,310
	Patent and patent licenses, net	24,007
	Customer relationships, net	55,925
	Goodwill	245,613
	Other purchased intangibles, net	8,901
	Deferred income taxes	—
	Other assets	1,706
	Total assets	$	512,523
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	$	40,296
	Income taxes payable	316
	Deferred revenue	5,277
	Total current liabilities	45,889
	Long-term debt	110,000
	Deferred income taxes	17,397
	Other long-term liabilities	16,243
	Mandatorily redeemable financial instrument	—
	Total liabilities	189,529
	Additional paid-in capital	317,932
	Retained earnings	6,051
	Accumulated other comprehensive loss	(989		)
	Total stockholders’ equity	322,994
	Total equity	322,994
	Total liabilities and stockholders’ equity	$	512,523
	The consolidated results of operations of the Unrestricted Subsidiaries for the year ended December 31, 2014 is as follows (in thousands):
		Year Ended December 31,
		2014
	Revenues	$	169,065
	Cost of revenues	19,028
	Gross profit	150,037
	Operating expenses:
	Sales and marketing	68,057
	Research, development and engineering	5,485
	General and administrative	52,768
	Total operating expenses	126,310
	Income from operations	23,727
	Other income (expenses):
	Interest expense (income), net	821
	Other expense (income), net	347
	Income before income taxes	22,559
	Income tax (benefit) expense	4,883
	Net income	17,676
	Less net income attributable to noncontrolling interest	—
	Net income attributable to common stockholders	$	17,676

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events
	On February 10, 2015, the Company's Board of Directors approved a quarterly cash dividend of $0.2925 per share of common stock payable on March 9, 2015 to all stockholders of record as of the close of business on February 23, 2015. In addition, the Company's Board of Directors extended the Company's share repurchase program set to expire February 20, 2015 to February 19, 2016. Finally, on February 10, 2015, the Company's Board of Directors appointed Jon Miller as a director, effective immediately.
	On February 11, 2015, in a cash transaction, the Company acquired Firstway Digital Limited, an Ireland global provider of digital fax services.
	On February 13, 2015, in a cash transaction, the Company acquired certain assets of inHouseIT, Inc. (d/b/a Nuvotera), a California based provider of email security services.
	On February 19, 2015, in a cash transaction, the Company acquired certain assets of EmailDirect, a California-based provider of email marketing services.

Basis_Of_Presentation_Policy

Basis Of Presentation (Policy)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Business Combinations Policy [Policy Text Block]
	(o)	Contingent Consideration
	j2 Global measures the contingent earn-out liabilities at fair value on a recurring basis using significant unobservable inputs classified within Level 3 of the fair value hierarchy (see Note 5 - Fair Value Measurements). The Company may use various valuation techniques depending on the terms and conditions of the contingent consideration including a Monte-Carlo simulation. This simulation uses probability distribution for each significant input to produce hundreds or thousands of possible outcomes and the results are analyzed to determine probabilities of different outcomes occurring. Significant increases or decreases to these inputs in isolation would result in a significantly higher or lower liability with a higher liability capped by the contractual maximum of the contingent earn-out obligation. Ultimately, the liability will be equivalent to the amount paid, and the difference between the fair value estimate and amount paid will be recorded in earnings. The amount paid that is less than or equal to the liability on the acquisition date is reflected as cash used in financing activities in our consolidated statements of cash flows. Any amount paid in excess of the liability on the acquisition date is reflected as cash used in operating activities.
	j2 Global reviews and re-assess the estimated fair value of contingent consideration on a quarterly basis, and the updated fair value could differ materially from the initial estimates. Changes in the estimated fair value of our contingent earn-out liabilities related to the time component of the present value calculation are reported in interest expense. Adjustments to the estimated fair value related to changes in all other unobservable inputs are reported in operating income.
Consolidation, Policy [Policy Text Block]
	(a)	Principles of Consolidation
	The accompanying consolidated financial statements include the accounts of j2 Global and its direct and indirect wholly-owned and less-than-wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
	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.
Use Of Estimates
	(b)	Use of Estimates
	The preparation of consolidated financial statements in accordance with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements, including judgments about investment classifications, and the reported amounts of net revenue and expenses during the reporting period. We believe that our most significant estimates are those related to valuation and impairment of marketable securities, valuation of assets acquired and liabilities assumed in connection with business combinations, long-lived and intangible asset impairment, contingent consideration, income taxes and contingencies and allowance for doubtful accounts. On an ongoing basis, management evaluates its estimates based on historical experience and on various other factors that the Company believes to be reasonable under the circumstances. Actual results could materially differ from those estimates.
Allowances For Doubtful Accounts
	(c)	Allowances for Doubtful Accounts
	j2 Global reserves for receivables it may not be able to collect. These reserves for the Company's Business Cloud Services are typically driven by the volume of credit card declines and past due invoices and are based on historical experience as well as an evaluation of current market conditions. These reserves for the Company's Digital Media segment are typically driven by past due invoices and are based on historical experience. On an ongoing basis, management evaluates the adequacy of these reserves.
Revenue Recognition
	(d)	Revenue Recognition
	Business Cloud Services
	The Company's Business Cloud Services revenues substantially consist of monthly recurring subscription and usage-based fees, which are primarily paid in advance by credit card. In accordance with GAAP, the Company recognizes revenue when persuasive evidence of an arrangement exists, services have been provided, the sales price is fixed and determinable and collection is probable. The Company defers the portions of monthly, quarterly, semi-annually and annually recurring subscription and usage-based fees collected in advance and recognizes them in the period earned. Additionally, the Company defers and recognizes subscriber activation fees and related direct incremental costs over a subscriber's estimated useful life.
	j2 Global's Business Cloud Services also include patent license revenues generated under license agreements that provide for the payment of contractually determined fully paid-up or royalty-bearing license fees to j2 Global in exchange for the grant of non-exclusive, retroactive and future licenses to our intellectual property, including patented technology. Patent revenues may also consist of revenues generated from the sale of patents. Patent license revenues are recognized when earned over the term of the license agreements. With regard to fully paid-up license arrangements, the Company recognizes as revenue in the period the license agreement is executed the portion of the payment attributable to past use of the intellectual property and amortizes the remaining portion of such payments on a straight-line basis, or pro-rata revenue basis, as appropriate over the life of the licensed patent(s). With regard to royalty-bearing license arrangements, the Company recognizes revenues of license fees earned during the applicable period. With regard to patent sales, the Company recognizes as revenue in the period of the sale the amount of the purchase price over the carrying value of the patent(s) sold.
	The Business Cloud Services business also generates revenues by licensing certain technology to third parties. These licensing revenues are recognized when earned in accordance with the terms of the underlying agreement. Generally, revenue is recognized as the third party uses the licensed technology over the period.
	Digital Media
	The Company's Digital Media revenues primarily consist of revenues generated from the sale of advertising campaigns that are targeted to the Company's proprietary websites and to those websites operated by third parties that are part of the Digital Media business's advertising network. Revenues for these advertising campaigns are recognized as earned either when an ad is placed for viewing by a visitor to the appropriate web page or when the visitor "clicks through" on the ad, depending upon the terms with the individual advertiser.
	Revenues for Digital Media business-to-business operations consist of lead-generation campaigns for IT vendors and are recognized as earned when the Company delivers the qualified leads to the customer.
	j2 Global also generates Digital Media revenues through the license of certain assets to clients, for the clients' use in their own promotional materials or otherwise. Such assets may include logos, editorial reviews, or other copyrighted material. Revenues under such license agreements are recognized when the assets are delivered to the client. Also, Digital Media revenues are generated through the license of certain speed testing technology which is recognized when delivered to the client through providing data services primarily to Internet Service Providers ("ISPs") and wireless carriers which is recognized as earned over the term of the access period. The Digital Media business also generates other types of revenues, including business listing fees, subscriptions to online publications, and from other sources. Such other revenues are recognized as earned.
Fair Value Measurements
	(e)	Fair Value Measurements
	j2 Global complies with the provisions of Financial Accounting Standards Board (“FASB”) ASC Topic No. 820, Fair Value Measurements and Disclosures (“ASC 820”), in measuring fair value and in disclosing fair value measurements. ASC 820 provides a framework for measuring fair value and expands the disclosures required for fair value measurements of financial and non-financial assets and liabilities.
	As of December 31, 2014, the carrying value of cash and cash equivalents, short-term investments, accounts receivable, interest receivable, accounts payable, accrued expenses, interest payable, customer deposits and long-term debt are reflected in the financial statements at cost. With the exception of long-term debt, cost approximates fair value due to the short-term nature of such instruments. The fair value of the Company's outstanding debt was determined using the quoted market prices of debt instruments with similar terms and maturities, if available. As of the same dates, the carrying value of other long-term liabilities approximated fair value as the related interest rates approximate rates currently available to j2 Global.
Cash and Cash Equivalents, Policy [Policy Text Block]
	(f)	Cash and Cash Equivalents
	j2 Global considers cash equivalents to be only those investments that are highly liquid, readily convertible to cash and with maturities of three months or less at the purchase date.
Investment, Policy [Policy Text Block]
	(g)	Investments
	j2 Global accounts for its investments in debt and equity securities in accordance with FASB ASC Topic No. 320, Investments - Debt and Equity Securities (“ASC 320”). Debt investments are typically comprised of corporate and governmental debt securities. Equity securities recorded as available-for-sale represent strategic equity investments. j2 Global determines the appropriate classification of its investments at the time of acquisition and evaluates such determination at each balance sheet date. Held-to-maturity securities are those investments which the Company has the ability and intent to hold until maturity and are recorded at amortized cost. Available-for-sale securities are those investments j2 Global does not intend to hold to maturity and can be sold. Available-for-sale securities are carried at fair value with unrealized gains and losses included in other comprehensive income. Trading securities are carried at fair value, with unrealized gains and losses included in investment income. All securities are accounted for on a specific identification basis.
Debt, Policy [Policy Text Block]
	(h)	Debt Issuance Costs and Debt Discount
	j2 Global capitalizes costs incurred with borrowing and issuance of debt securities and records debt discounts as a reduction to the debt amount. j2 Global capitalized third-party costs incurred in connection with its sale of senior unsecured notes within long-term other assets and recorded the original purchase discount as a reduction to such notes (see Note 8 - 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.
Derivatives, Policy [Policy Text Block]
	(i)	Derivative Instruments
	j2 Global currently holds an embedded derivative instrument related to contingent interest in connection with its 3.25% Convertible Notes issued on June 10, 2014. This embedded derivative instrument is carried at fair value with changes recorded to interest expense (see Note 5 - Fair Value Measurements).
Concentration Of Credit Risk
	(j)	Concentration of Credit Risk
	All of the Company’s cash, cash equivalents and marketable securities are invested at major financial institutions primarily within the United States, United Kingdom and Ireland. 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 December 31, 2014, the Company’s cash and cash equivalents were maintained in accounts that are insured up to the limit determined by the applicable governmental agency. The Company's deposits held in qualifying financial institutions in Ireland are fully insured through March 28, 2018 to the extent on deposit prior to March 28, 2013. With respect to the Company's deposits with financial institutions in other jurisdictions, the insured amount held in other institutions is immaterial in comparison to the total amount of the Company’s cash and cash equivalents held by these institutions which is not insured. These institutions are primarily in the United States and United Kingdom, however, the Company has accounts within several other countries including Australia, Austria, China, France, Germany, Italy, Japan, New Zealand, the Netherlands and Poland.
Foreign Currency Transactions and Translations Policy [Policy Text Block]
	(k)	Foreign Currency
	Some of j2 Global's foreign subsidiaries use the local currency of their respective countries as their functional currency. Assets and liabilities are translated at exchange rates prevailing at the balance sheet dates. Revenues, costs and expenses are translated into U.S. Dollars at average exchange rates for the period. Gains and losses resulting from translation are recorded as a component of accumulated other comprehensive income/(loss). Net translation gain/(loss) were $(14.7) million, $0.1 million and $1.4 million for the years ended December 31, 2014, 2013 and 2012, respectively. Realized gains and losses from foreign currency transactions are recognized within other expense (income), net. Net transaction gain/(loss) was $(0.1) million, $0.4 million and $(0.1) million for the years ended December 31, 2014, 2013 and 2012, respectively.
Property, Plant and Equipment, Policy [Policy Text Block]
	(l)	Property and Equipment
	Property and equipment are stated at cost. Equipment under capital leases is stated at the present value of the minimum lease payments. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives of property and equipment range from one to 10 years. Fixtures, which are comprised primarily of leasehold improvements and equipment under capital leases, are amortized on a straight-line basis over their estimated useful lives or for leasehold improvements, the related lease term, if less. The Company has capitalized certain internal use software and website development costs which are included in property and equipment. The estimated useful life of costs capitalized is evaluated for each specific project and ranges from 1 to 5 years.
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
	(m)	Long-Lived Assets
	j2 Global accounts for long-lived assets, which include property and equipment and identifiable intangible assets with finite useful lives (subject to amortization), in accordance with the provisions of FASB ASC Topic No. 360, Property, Plant, and Equipment (“ASC 360”), which requires that long-lived assets be reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability is measured by comparing the carrying amount of an asset to the expected undiscounted future net cash flows generated by the asset. If it is determined that the asset may not be recoverable, and if the carrying amount of an asset exceeds its estimated fair value, an impairment charge is recognized to the extent of the difference.
	j2 Global assessed whether events or changes in circumstances have occurred that potentially indicate the carrying amount of long-lived assets may not be recoverable. No impairment was recorded in fiscal year 2014, 2013 and 2012.
Goodwill and Intangible Assets, Policy [Policy Text Block]
	(n)	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. Intangible assets subject to amortization are amortized over the period of estimated economic benefit ranging from 1 to 20 years. In accordance with FASB ASC Topic No. 350, Intangibles - Goodwill and Other (“ASC 350”), goodwill and other intangible assets with indefinite lives are not amortized but tested annually for impairment or more frequently if j2 Global believes indicators of impairment exist. In connection with the annual impairment test for goodwill, the Company has the option to perform a qualitative assessment in determining whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the Company determines that it was more likely than not that the fair value of the reporting unit is less than its carrying amount, then it performs the impairment test upon goodwill. The impairment test involves a two-step process. The first step involves comparing the fair values of the applicable reporting units with their aggregate carrying values, including goodwill. The Company generally determines the fair value of its reporting units using the income approach methodology of valuation. If the carrying value of a reporting unit exceeds the reporting unit's fair value, j2 Global performs the second step of the test to determine the amount of impairment loss. The second step involves measuring the impairment by comparing the implied fair values of the affected reporting unit's goodwill and intangible assets with the respective carrying values. . In connection with the annual impairment test for indefinite-lived intangible assets, we have the option to perform a qualitative assessment in determining whether it is more likely than not that the fair value is less than its carrying amount, then we perform the impairment test upon indefinite-lived intangible assets. The impairment testing for indefinite-lived intangible assets consists of comparing the carrying values to the fair values and an impairment loss is recorded if the carrying value exceeds the fair value. j2 Global completed the required impairment review at the end of 2014, 2013 and 2012 and concluded that there were no impairments. Consequently, no impairment charges were recorded.
Income Taxes
	(p)	Income Taxes
	j2 Global's income is subject to taxation in both the U.S. and numerous foreign jurisdictions. Significant judgment is required in evaluating the Company's tax positions and determining its provision for income taxes. During the ordinary course of business, there are many transactions and calculations for which the ultimate tax determination is uncertain. j2 Global establishes reserves for tax-related uncertainties based on estimates of whether, and the extent to which, additional taxes will be due. These reserves for tax contingencies are established when the Company believes that certain positions might be challenged despite the Company's belief that its tax return positions are fully supportable. j2 Global adjusts these reserves in light of changing facts and circumstances, such as the outcome of a tax audit or lapse of a statute of limitations. The provision for income taxes includes the impact of reserve provisions and changes to reserves that are considered appropriate.
	j2 Global accounts for income taxes in accordance with FASB ASC Topic No. 740, Income Taxes (“ASC 740”), which requires that deferred tax assets and liabilities be recognized using enacted tax rates for the effect of temporary differences between the book and tax basis of recorded assets and liabilities. ASC 740 also requires that deferred tax assets be reduced by a valuation allowance if it is more likely than not that some or all of the net deferred tax assets will not be realized. The valuation allowance is reviewed quarterly based upon the facts and circumstances known at the time. In assessing this valuation allowance, j2 Global reviews historical and future expected operating results and other factors, including its recent cumulative earnings experience, expectations of future taxable income by taxing jurisdiction and the carryforward periods available for tax reporting purposes, to determine whether it is more likely than not that deferred tax assets are realizable.
	ASC 740 provides guidance on the minimum threshold that an uncertain income tax benefit is required to meet before it can be recognized in the financial statements and applies to all income tax positions taken by a company. ASC 740 contains a two-step approach to recognizing and measuring uncertain income tax positions. 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. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon settlement. If it is not more likely than not that the benefit will be sustained on its technical merits, no benefit will be recorded. Uncertain income tax positions that relate only to timing of when an item is included on a tax return are considered to have met the recognition threshold. j2 Global recognized accrued interest and penalties related to uncertain income tax positions in income tax expense on its consolidated statement of income.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]
	(q)	Share-Based Compensation
	j2 Global accounts for share-based awards in accordance with the provisions of FASB ASC Topic No. 718, Compensation - Stock Compensation (“ASC 718”). Accordingly, j2 Global measures share-based compensation expense at the grant date, based on the fair value of the award, and recognizes the expense over the employee's requisite service period using the straight-line method. The measurement of share-based compensation expense is based on several criteria, including but not limited to the valuation model used and associated input factors, such as expected term of the award, stock price volatility, risk free interest rate, dividend rate and award cancellation rate. These inputs are subjective and are determined using management's judgment. If differences arise between the assumptions used in determining share-based compensation expense and the actual factors, which become known over time, j2 Global may change the input factors used in determining future share-based compensation expense. Any such changes could materially impact the Company's results of operations in the period in which the changes are made and in periods thereafter. The Company estimates the expected term based upon the historical exercise behavior of our employees.
	j2 Global accounts for option grants to non-employees in accordance with FASB ASC Topic No. 505, Equity, whereby the fair value of such options is determined using the Black-Scholes option pricing model at the earlier of the date at which the non-employee's performance is complete or a performance commitment is reached.
Earnings Per Share, Policy [Policy Text Block]
	(r)	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 payment 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.
Research and Development Expense, Policy [Policy Text Block]
	(s)	Research, Development and Engineering
	Research, development and engineering costs are expensed as incurred. Costs for software development incurred subsequent to establishing technological feasibility, in the form of a working model, are capitalized and amortized over their estimated useful lives. To date, software development costs incurred after technological feasibility has been established have not been material.
Segment Reporting, Policy [Policy Text Block]
	(t)	Segment Reporting
	FASB ASC Topic No. 280, Segment Reporting (“ASC 280”), establishes standards for the way that public business enterprises report information about operating segments in annual consolidated financial statements and requires that those enterprises report selected information about operating segments in interim financial reports. ASC 280 also establishes standards for related disclosures about products and services, geographic areas and major customers. As a result of the acquisition of Ziff Davis, Inc. as described in Note 3 - Business Acquisitions, the Company operates as two segments: (1) Business Cloud Services and (2) Digital Media.
Advertising Costs, Policy [Policy Text Block]
	(u)	Advertising Costs
	Advertising costs are expensed as incurred. Advertising costs for the year ended December 31, 2014, 2013 and 2012 was $60.5 million, $55.4 million and $48.1 million, respectively.
Revenue Recognition, Excise and Sales Taxes
	(v)	Sales Taxes
	The Company may collect sales taxes from certain customers which are remitted to governmental authorities as required and are excluded from revenues.
New Accounting Pronouncements, Policy [Policy Text Block]
	(w)	Recent Accounting Pronouncements
	In July 2013, the FASB issued 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.
	In November 2014, the FASB issued ASU No. 2014-16, Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share is More Akin to Debt or to Equity, which clarifies how current guidance should be interpreted in evaluating the economic characteristics and risks of a host contract in a hybrid financial instrument that is issued in the form of a share. Specifically, the amendments clarify that an entity should consider all relevant terms and features, including the embedded derivative feature being evaluated for bifurcation, in evaluating the nature of the host contract. The assessment of the substance of the relevant terms and features should incorporate a consideration of: (1) the characteristics of the terms and features themselves; (2) the circumstances under which the hybrid financial instrument was issued or acquired; and (3) the potential outcomes of the hybrid financial instrument, as well as the likelihood of those potential outcomes. The amendments in this ASU apply to all entities that are issuers of, or investors in, hybrid financial instruments that are issued in the form of a share. The amendments in this ASU are effective for annual reporting periods beginning after December 15, 2015, including interim periods within that reporting period. Early adoption is permitted. The Company is currently evaluating the impact of adoption on our financial statements and related disclosures.
	In November 2014, the FASB issued ASU No. 2014-17, Business Combinations (Topic 805): Pushdown Accounting. The amendments in this ASU provide guidance on whether and at what threshold an acquired entity that is a business or nonprofit activity may elect to apply pushdown accounting in its separate financial statements upon a change-in control event in which an acquirer obtains control of the acquired entity. The amendments in this ASU are effective on November 18, 2014. After the effective date, an acquired entity can make an election to apply the guidance to future change-in control events or to its most recent change-in control event. However, if the financial statements for the period in which the most recent change-in control event occurred already have been issued or made available to be issued, the application of this guidance would be a change in accounting principle. The adoption of this standard is not expected to have a material impact on our financial statements.
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)	12 Months Ended
	Dec. 31, 2014						Dec. 31, 2013						Dec. 31, 2012
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The following table summarizes the allocation of the purchase consideration for these acquisitions (in thousands):						The following table summarizes the allocation of the purchase consideration as follows (in thousands):
	Assets and Liabilities	Valuation					Assets and Liabilities	Valuation
	Accounts receivable	$	18,024				Accounts receivable	$	24,658
	Property and equipment		10,022				Property and equipment		3,274
	Other assets		5,500				Other assets		2,703
	Deferred tax asset		419				Deferred tax asset		2,058
	Software		9,836				Software		3,031
	Trade name		28,192				Content		2,460
	Customer relationship		98,498				Trade name		18,581
	Other intangibles		2,121				Customer relationship		40,275
	Goodwill		184,837				Advertiser Relationship		11,770
	Deferred revenue		(29,182	)			Other intangibles		168
	Deferred tax liability		(12,328	)
	Other accrued liabilities		(14,338	)			Goodwill		54,472
	Capital lease		(1,361	)
	Total	$	300,240				Deferred revenue		(2,543	)
							Other accrued liabilities		(13,162	)
							Total	$	147,745
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):						The supplemental information on an unaudited pro forma financial basis presents the combined results of j2 Global and its 2013 acquisitions as if each acquisition had occurred on January 1, 2012 (in thousands, except per share amounts):						The supplemental information on an unaudited pro forma financial basis presents the combined results of j2 Global and its 2012 acquisitions as if each acquisition had occurred on January 1, 2011 (in thousands, except per share amounts):
		Year ended						Year ended						Year ended
		December 31,			December 31,			December 31,			December 31,			December 31,			December 31,
		2014			2013			2013			2012			2012			2011
		(unaudited)			(unaudited)			(unaudited)			(unaudited)			(unaudited)			(unaudited)
	Revenues	$	672,701		$	626,906	Revenues	$	545,952		$	470,190	Revenues	$	417,250		$	385,974
	Net income attributable to j2 Global, Inc. common shareholders	$	119,773		$	132,480	Net income attributable to j2 Global, Inc. common shareholders	$	108,600		$	122,187	Net income attributable to j2 Global, Inc. common shareholders	$	120,210		$	114,889
	EPS - Basic	$	2.51		$	2.85	EPS - Basic	$	2.34		$	2.64	EPS - Basic	$	2.6		$	2.47
	EPS - Diluted	$	2.49		$	2.81	EPS - Diluted	$	2.31		$	2.62	EPS - Diluted	$	2.58		$	2.44
Ziff Davis, Inc [Member]
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]													The following table summarizes the allocation of the purchase consideration (including the portion allocable to the minority interest) as follows (in thousands):
													Assets and Liabilities	Valuation
													Accounts receivable	$	14,450
													Property and equipment		842
													Software		4,780
													Other assets		1,283
													Deferred tax asset		1,139
													Trade name		37,730
													Customer relationship		5,380
													Advertiser relationship		14,500
													Licensing relationships		4,910
													Other intangibles		2,540
													Goodwill		112,882
													Deferred revenue		(2,188	)
													Other accrued liabilities		(4,767	)
													Deferred tax liability		(21,829	)
													Total	$	171,652

Investments_Tables

Investments (Tables)	12 Months Ended
	Dec. 31, 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):
		December 31,		December 31, 2013
		2014
	Due within 1 year	$	59,896	$	46,339
	Due within more than 1 year but less than 5 years	60,178		44,865
	Due within more than 5 years but less than 10 years	—		—
	Due 10 years or after	330		2,486
	Total	$	120,404	$	93,690
Schedule Of Available-For-Sale And Trading Securities	The following table summarizes the Company’s investments (in thousands):
		December 31,		December 31, 2013
		2014
	Available-for-sale	$	156,649	$	123,737
	Certificates of deposit	65		14,403
	Total	$	156,714	$	138,140
Summary Of Gross Unrealized Gains And Losses And Fair Values	The following table summarizes the gross unrealized gains and losses and fair values for investments classified as available for sale as of December 31, 2014 and December 31, 2013 aggregated by major security type (in thousands):
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			Losses
	December 31, 2014
	Corporate debt securities	$	91,456	$	147		$	(136	)	$	91,467
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	26,848		9			(13		)	26,844
	Debt securities issued by states of the United States and political subdivisions of the states	2,088		5			—			2,093
	Equity securities	20,611		15,634			—			36,245
	Total	$	141,003	$	15,795		$	(149	)	$	156,649
	December 31, 2013
	Corporate debt securities	$	66,587	$	134		$	(29	)	$	66,692
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	23,689		20			(7		)	23,702
	Debt securities issued by states of the United States and political subdivisions of the states	3,293		4			(1		)	3,296
	Equity securities	20,610		9,558			(121		)	30,047
	Total	$	114,179	$	9,716		$	(158	)	$	123,737
Schedule of Unrealized Loss on Investments [Table Text Block]	The following tables present gross unrealized losses and fair values for those investments that were in an unrealized loss position as of December 31, 2014 and December 31, 2013, aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in thousands):
		As of December 31, 2014
		Less than 12 Months					12 Months or Greater						Total
		Fair Value		Unrealized Loss			Fair Value			Unrealized Loss			Fair Value		Unrealized Loss
	Corporate debt securities	$	57,898	$	(131	)	$	1,260		$	(5	)	$	59,158	$	(136	)
	Debt securities issued by states of the United States and political subdivisions of the states	15,072		(13		)	—			—			15,072		(13		)
	Total	$	72,970	$	(144	)	$	1,260		$	(5	)	$	74,230	$	(149	)
		As of December 31, 2013
		Less than 12 Months					12 Months or Greater						Total
		Fair Value		Unrealized Loss			Fair Value			Unrealized Loss			Fair Value		Unrealized Loss
	Corporate debt securities	$	9,944	$	(4	)	$	1,263		$	(3	)	$	11,207	$	(7	)
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	109		(1		)	—			—			109		(1		)
	Debt securities issued by states of the United States and political subdivisions of the states	26,445		(28		)	777			(2		)	27,222		(30		)
	Equity securities	832		(120		)	—			—			832		(120		)
	Total	$	37,330	$	(153	)	$	2,040		$	(5	)	$	39,370	$	(158	)

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 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 assets or liabilities that are measured at fair value on a recurring basis (in thousands):
	December 31, 2014	Level 1		Level 2		Level 3		Fair Value
	Assets:
	Cash equivalents:
	Money market and other funds	$	212,645	$	—	$	—	$	212,645
	Time deposits	—		51,807		—		51,807
	Certificates of Deposit	—		65		—		65
	Equity securities	36,245		—		—		36,245
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	—		26,844		—		26,844
	Debt securities issued by states of the United States and political subdivisions of the states	—		2,093		—		2,093
	Corporate debt securities	—		91,467		—		91,467
	Total assets measured at fair value	$	248,890	$	172,276	$	—	$	421,166
	Liabilities:
	Contingent consideration	$	—	$	—	$	15,000	$	15,000
	Contingent interest derivative	—		742		—		742
	Total liabilities measured at fair value	$	—	$	742	$	15,000	$	15,742
	December 31, 2013	Level 1		Level 2		Level 3		Fair Value
	Assets:
	Cash equivalents:
	Money market and other funds	$	101,231	$	—	$	—	$	101,231
	Time deposits	22,773		—		—		22,773
	Certificates of Deposit	14,403		—		—		14,403
	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 United States and political subdivisions of the states	3,296		—		—		3,296
	Corporate debt securities	66,692		—		—		66,692
	Total assets measured at fair value	$	262,144	$	—	$	—	$	262,144
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	The following tables presents a reconciliation of the Company’s Level 3 financial assets or liabilities that are measured at fair value on a recurring basis (in thousands):
		Level 3		Affected line item in the Statement of Income
	Balance as of December 31, 2013	$	—
	Contingent consideration	15,000		Not Applicable
	Total (gains) losses reported in earnings	—
	Transfers into or out of Level 3	—
	Balance as of December 31, 2014	$	15,000
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	The following tables presents a reconciliation of the Company’s derivative instruments (in thousands):
		Amount		Affected line item in the Statement of Income
	Derivative Liabilities:
	Level 2:
	Balance as of December 31, 2013	$	—
	Contingent interest	372
	Total (gains) losses reported in earnings	370		Interest expense (income), net
	Balance as of December 31, 2014	$	742

Property_And_Equipment_Tables

Property And Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property And Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]	Property and equipment, stated at cost, at December 31, 2014 and 2013 consisted of the following (in thousands):
		2014			2013
	Computers and related equipment	$	100,537		$	79,576
	Furniture and equipment	1,763			1,405
	Leasehold improvements	9,098			5,718
		111,398			86,699
	Less: Accumulated depreciation and amortization	(73,181		)	(55,499		)
	Total property and equipment, net	$	38,217		$	31,200

Goodwill_And_Intangible_Assets1

Goodwill And Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014													Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Changes In Carrying Amounts Of Goodwill	The changes in carrying amounts of goodwill for the year ended December 31, 2014 and 2013 are as follows (in thousands):
		Business Cloud Services				Digital Media				Consolidated
	Balance as of January 1, 2013	$	294,943			$	112,882			$	407,825
	Goodwill acquired	21,551				32,921				54,472
	Purchase Accounting Adjustments	(259		)		(5,065		)		(5,324		)
	Foreign exchange translation	447				2				449
	Balance as of December 31, 2013	$	316,682			$	140,740			$	457,422
	Goodwill acquired	79,536				105,301				184,837
	Purchase accounting adjustments	(706		)		(329		)		(1,035		)
	Foreign exchange translation	(5,449		)		(100		)		(5,549		)
	Balance as of December 31, 2014	$	390,063			$	245,612			$	635,675
Schedule Of Intangible Assets With Indefinite Lives	Intangible Assets with Indefinite Lives:
		2014				2013
	Trade names	$	27,379			$	27,379
	Other	5,432				5,432
	Total	$	32,811			$	32,811
Finite-Lived Intangible Assets By Major Class	As of December 31, 2014, intangible assets subject to amortization relate primarily to the following (in thousands):													As of December 31, 2013, intangible assets subject to amortization relate primarily to the following (in thousands):
															Weighted-Average	Historical		Accumulated		Net
		Weighted-Average		Historical				Accumulated				Net			Amortization	Cost		Amortization
		Amortization		Cost				Amortization							Period
		Period												Trade names	17.0 years	$	66,911	$	11,182	$	55,729
	Trade names	14.5 years		$	94,770			$	16,598			$	78,172
														Patent and patent licenses	8.1 years	58,446		29,916		28,530
	Patent and patent licenses	9.0 years		62,940				38,013				24,927
														Customer relationships	8.1 years	139,362		38,382		100,980
	Customer relationships	9.3 years		230,424				66,658				163,766
														Other purchased intangibles	5.0 years	18,149		12,666		5,483
	Other purchased intangibles	4.3 years		28,360				16,236				12,124
														Total		$	282,868	$	92,146	$	190,722
	Total			$	416,494			$	137,505			$	278,989
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Expected amortization expense for intangible assets subject to amortization at December 31, 2014 are as follows (in thousands):
	Fiscal Year:
	2015	$	56,349
	2016	50,380
	2017	42,081
	2018	28,940
	2019	22,137
	Thereafter	79,102
	Total expected amortization expense	$	278,989

Long_Term_Debt_Tables

Long Term Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Long-term Debt, Unclassified [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	Long-term debt as of December 31, 2014 consists of the following (in thousands):
	Senior Notes	$	246,187
	Convertible Notes	347,163
	Total long-term debt	$	593,350
	Less: Current portion	—
	Total long-term debt, less current portion	$	593,350
Schedule of Maturities of Long-term Debt [Table Text Block]	At December 31, 2014, future principal payments for debt were as follows (in thousands):
	Year Ended December 31,
	2015	$	—
	2016	—
	2017	—
	2018	—
	2019	—
	Thereafter	652,500
		$	652,500

Commitments_And_Contingencies_

Commitments And Contingencies Commitments And Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies [Abstract]
Schedule of Capital Leased Assets [Table Text Block]	Capital Leases
	As of December 31, 2014 and 2013, assets held under capital leases are as follows:
		2014			2013
	Capital leases	$	805		$	—
	Less: Accumulated depreciation	(440		)	—
	Total capital leases, net	$	365		$	—
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	j2 Global leases certain facilities and equipment under non-cancelable operating leases which expire at various dates through 2024. Office and equipment leases are typically for terms of three to five years and generally provide renewal options for terms up to an additional five years. In most cases, the Company expects leases that expire will be renewed or replaced by other leases with similar terms. Future minimum lease payments at December 31, 2014 under non-cancelable operating leases (with initial or remaining lease terms in excess of one year) are as follows (in thousands):
		Lease Payments
	Fiscal Year:
	2015	$	9,025
	2016	7,737
	2017	5,412
	2018	4,734
	2019	3,251
	Thereafter	1,161
	Total minimum lease payments	$	31,320
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]	Future minimum payments at December 31, 2014 under all capital leases (with initial or remaining lease terms in excess of one year) are as follows (in thousands):
		Future Payments
	Fiscal Year:
	2015	$	314
	2016	77
	2017	8
	2018	—
	2019	—
	Thereafter	—
	Total minimum lease payments	$	399

Income_Taxes_Income_Taxes_Tabl

Income Taxes Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Taxes [Abstract]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	The provision for income tax consisted of the following (in thousands):
		Years Ended December 31,
		2014				2013				2012
	Current:
	Federal	$	22,074			$	22,834			$	20,759
	State	3,822				2,676				(289		)
	Foreign	13,977				9,415				11,639
	Total current	39,873				34,925				32,109
	Deferred:
	Federal	(958		)		3,678				2,427
	State	(5,019		)		(235		)		314
	Foreign	(4,056		)		(3,193		)		(1,591		)
	Total deferred	(10,033		)		250				1,150
	Total provision	$	29,840			$	35,175			$	33,259
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	A reconciliation of the statutory federal income tax rate with j2 Global's effective income tax rate is as follows:
		Years Ended December 31,
		2014		2013			2012
	Statutory tax rate	35	%		35	%		35	%
	State income taxes, net	0.6			0.3			0.5
	Foreign rate differential	(13.8	)		(17.9	)		(17.4	)
	Reserve for uncertain tax positions	(2.2	)		4.3			4.9
	Valuation allowance	2.6			1.9			3.2
	IRC Section 199 deductions	(0.5	)		(0.5	)		(3.4	)
	Other	(2.5	)		1.6			(1.3	)
	Effective tax rates	19.2	%		24.7	%		21.5	%
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	Deferred tax assets and liabilities result from differences between the financial statement carrying amounts and the tax bases of existing assets and liabilities. Temporary differences and carryforwards which give rise to deferred tax assets and liabilities are as follows (in thousands):
		Years Ended December 31,
		2014				2013
	Deferred tax assets:
	Net operating loss carryforwards	$	13,774			$	9,596
	Tax credit carryforwards	14,091				9,233
	Accrued expenses	7,114				1,196
	Allowance for bad debt	1,132				1,423
	Share-based compensation expense	3,632				4,917
	Basis difference in fixed assets	—				1,266
	Impairment of investments	76				161
	Gain on sale of intangible assets	—				123
	Deferred revenue	250				812
	State taxes	2,333				1,451
	Other	789				—
		43,191				30,178
	Less:  valuation allowance	(11,358		)		(8,493		)
	Total deferred tax assets	$	31,833			$	21,685
	Deferred tax liabilities:
	Basis difference in fixed assets	$	(5,883	)		$	—
	Basis difference in intangible assets	(51,566		)		(47,711		)
	Prepaid insurance	(420		)		(369		)
	Convertible debt	(26,272		)		—
	Other	(7,981		)		(6,359		)
	Total deferred tax liabilities	(92,122		)		(54,439		)
	Net deferred tax liabilities	$	(60,289	)		$	(32,754	)
Summary of Income Tax Contingencies [Table Text Block]	The aggregate changes in the balance of gross unrecognized tax benefits, which excludes interest and penalties, for 2014, 2013 and 2012, is as follows (in thousands):
		Years Ended December 31,
		2014				2013				2012
	Beginning balance	$	40,888			$	35,421			$	28,366
	Increases related to tax positions during a prior year	919				58				1,022
	Decreases related to tax positions taken during a prior year	(9,808		)		(1,519		)		(557		)
	Increases related to tax positions taken in the current year	3,765				6,928				6,590
	Decreases related to expiration of statute of limitations	(1,129		)		—				—
	Ending balance	$	34,635			$	40,888			$	35,421

Stockholders_Equity_Dividends_

Stockholders' Equity Dividends Declared (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Dividends Declared [Table Text Block]	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

Stock_Options_And_Employee_Sto1

Stock Options And Employee Stock Purchase Plan (Tables)	12 Months Ended
	Dec. 31, 2014
Stock Options Activity	Stock option activity for the years ended December 31, 2014, 2013 and 2012 is summarized as follows:
		Number of Shares		Weighted-Average				Weighted-Average Remaining Contractual Life (In Years)		Aggregate
				Exercise Price						Intrinsic
										Value
	Options outstanding at December 31, 2011	2,087,695		$	20.99
	Granted	67,000		27.26
	Exercised	(357,234	)	15.81
	Canceled	(32,000	)	31.34
	Options outstanding at December 31, 2012	1,765,461		$	22.08
	Granted	—		—
	Exercised	(569,204	)	23.9
	Canceled	(20,600	)	21.79
	Options outstanding at December 31, 2013	1,175,657		$	21.08
	Granted	—		—
	Exercised	(433,008	)	15.7
	Canceled	(17,000	)	29.85
	Options outstanding at December 31, 2014	725,649		$	24.29			3.9		$27,362,157
	Exercisable at December 31, 2014	618,437		$	23.77			3.4		$23,642,294
	Vested and expected to vest at December 31, 2014	714,319		$	24.24			3.8		$26,975,686
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	The following table summarizes information concerning outstanding and exercisable options as of December 31, 2014:
			Options Outstanding								Exercisable Options
	Range of		Number Outstanding December 31, 2014		Weighted		Weighted				Number	Weighted
	Exercise Prices				Average		Average				Exercisable	Average
					Remaining		Exercise				December 31,	Exercise
					Contractual		Price				2014	Price
					Life
	$17.19		49,283		4.18 years		$	17.19			49,283	$	17.19
	18.77		128,200		0.67 years		18.77				128,200	18.77
	20.91		77,448		3.34 years		20.91				77,448	20.91
	21.67 - 21.88		74,420		4.21 years		31.69				74,420	21.69
	22.92		98,716		5.35 years		22.92				76,780	22.92
	23.11 - 28.52		75,382		4.95 years		26.87				44,382	27.06
	29.34		90,700		6.36 years		29.34				54,424	29.34
	29.53		22,000		7.17 years		29.53				7,000	29.53
	31.07		7,500		6.82 years		31.07				4,500	31.07
	32.45		102,000		2.59 years		32.45				102,000	32.45
	$17.19 - $32.45		725,649		3.88 years		$	24.29			618,437	$	23.77
Assumptions To Estimate Fair Value Of Stock Options	The weighted-average fair values of stock options granted have been estimated utilizing the following assumptions:
		Year Ended December 31,
		2012
	Risk-free interest rate	1.10%
	Expected term (in years)	5.7
	Dividend yield	3.20%
	Expected volatility	41.60%
Allocation Of Share-Based Compensation Expense	The following table represents share-based compensation expense included in cost of revenues and operating expenses in the consolidated statements of income for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Year Ended December 31,
		2014			2013				2012
	Cost of revenues	$	345		$	756			$	844
	Operating expenses:
	Sales and marketing	1,944			1,855				1,543
	Research, development and engineering	721			434				459
	General and administrative	5,898			6,675				6,286
		$	8,908		$	9,720			$	9,132
Restricted Stock [Member]
Restricted Stock And Restricted Stock Unit Award Activity	Restricted stock award activity for the years ended December 31, 2014 and 2013 is set forth below:
		Shares		Weighted-Average
				Grant-Date
				Fair Value
	Nonvested at January 1, 2013	828,475		$	23.08
	Granted	690,762		13.57
	Vested	(296,966	)	21.46
	Canceled	(43,900	)	24.46
	Nonvested at December 31, 2013	1,178,371		$	17.86
	Granted	226,864		45.66
	Vested	(546,115	)	15.63
	Canceled	(45,070	)	35.55
	Nonvested at December 31, 2014	814,050		$	26.57
Restricted Stock Units (RSUs) [Member]
Restricted Stock And Restricted Stock Unit Award Activity	Restricted stock unit activity for the years ended December 31, 2014 and 2013 is set forth below:
		Number of		Weighted-Average		Aggregate
		Shares		Remaining		Intrinsic
				Contractual		Value
				Life (in Years)
	Outstanding at January 1, 2013	115,466
	Granted	38,375
	Vested	(11,116	)
	Canceled	(33,000	)
	Outstanding at December 31, 2013	109,725
	Granted	38,737
	Vested	(19,598	)
	Canceled	(25,940	)
	Outstanding at December 31, 2014	102,924		2.1		$	6,381,288
	Vested and expected to vest at December 31, 2014	79,445		1.9		$	4,925,584

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 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):
		Year Ended December 31,
		2014			2013			2012
	Numerator for basic and diluted net income per common share:
	Net income attributable to j2 Global, Inc. common shareholders	$	124,336		$	107,522		$	121,580
	Net income available to participating securities (a)	(2,590		)	(2,105		)	(2,075		)
	Net income available to j2 Global, Inc. common shareholders	121,746			105,417			119,505
	Denominator:
	Weighted-average outstanding shares of common stock	46,778,015			45,548,767			45,459,712
	Dilutive effect of:
	Equity incentive plans	328,523			591,252			321,946
	Common stock and common stock equivalents	47,106,538			46,140,019			45,781,658
	Net income per share:
	Basic	$	2.6		$	2.31		$	2.63
	Diluted	$	2.58		$	2.28		$	2.61
	(a)	Represents unvested share-based payment awards that contain certain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid).

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting Information [Line Items]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	Information on reportable segments and reconciliation to consolidated income from operations is as follows (in thousands):
		Years Ended December 31,
		2014			2013			2012
	Revenue by segment:
	Business Cloud Services	$	431,475		$	390,104		$	361,684
	Digital Media	167,814			131,146			9,712
	Elimination of inter-segment revenues	(259		)	(449		)	—
	Total revenue	599,030			520,801			371,396
	Direct costs by segment(1):
	Business Cloud Services	241,592			191,169			174,324
	Digital Media	137,321			124,413			6,823
	Direct costs by segment(1):	378,913			315,582			181,147
	Business Cloud Services operating income	189,883			198,935			187,360
	Digital Media operating income	30,493			6,733			2,889
	Segment operating income	220,376			205,668			190,249
	Global operating costs(2)	34,170			30,245			28,087
	Income from operations	$	186,206		$	175,423		$	162,162
	(1) Direct costs for each segment include cost of revenue and other operating expenses that are directly attributable to the segment such as employee compensation expense, local sales and marketing expenses, engineering and operations, 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.
Schedule of Segment Reporting Information, by Segment [Table Text Block]
		2014			2013
	Assets:
	Business Cloud Services	$	883,587		$	818,722
	Digital Media	378,381			333,286
	Total assets from reportable segments	1,261,968			1,152,008
	Corporate	443,234			1,781
	Total assets	$	1,705,202		$	1,153,789
		2014			2013			2012
	Capital expenditures:
	Business Cloud Services	$	6,639		$	10,979		$	4,240
	Digital Media	4,920			6,635			380
	Total from reportable segments	$	11,559		$	17,614		$	4,620
	Corporate	270			1,013			441
	Total capital expenditures	$	11,829		$	18,627		$	5,061
	Depreciation and amortization:
	Business Cloud Services	$	39,699		$	24,148		$	20,473
	Digital Media	22,483			14,963			1,167
	Total from reportable segments	62,182			39,111			21,640
	Corporate	771			677			512
	Total depreciation and amortization	$	62,953		$	39,788		$	22,152
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).
		Year Ended December 31,
		2014			2013			2012
	Revenues:
	United States	$	403,279		$	369,507		$	233,585
	Canada	70,434			73,130			79,656
	Ireland	42,979			41,398			41,248
	All other countries	82,338			36,766			16,907
	Total	$	599,030		$	520,801		$	371,396
		December 31,			December 31,
		2014			2013
	Long-lived assets:
	United States	$	216,099		$	170,247
	All other countries	101,107			51,675
	Total	$	317,206		$	221,922

Condensed_Consolidating_Financ1

Condensed Consolidating Financials (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Consolidating Financials [Abstract]
Condensed Financial Statements [Text Block]	Consolidating Financial Statements
	In connection with the June 2014 Convertible Note issuance, j2 Global, Inc. entered into a supplemental indenture related to the Senior Notes pursuant to which it fully and unconditionally guaranteed, on an unsecured basis, the full and punctual payment of the Senior Notes issued by its wholly owned subsidiary, j2 Cloud Services, Inc. j2 Cloud Services, Inc. is subject to restrictions on dividends in its existing indenture with respect to the Senior Notes. 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. AND SUBSIDIARIES
	CONSOLIDATED BALANCE SHEET
	31-Dec-14
	(In thousands except share and per share data)
	BALANCE SHEET	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	ASSETS
	Cash and cash equivalents	226,790			36,810			170,063			—			433,663
	Short-term investments	47,880			48,261			65			—			96,206
	Accounts receivable, net	—			11,167			80,532			—			91,699
	Prepaid expenses and other current assets	776			12,689			9,137			—			22,602
	Deferred income taxes	1,271			—			742			—			2,013
	Intercompany receivable	110,000			74,938			1,428			(186,366		)	—
	Total current assets	386,717			183,865			261,967			(186,366		)	646,183
	Long-term investments	55,452			5,056			—			—			60,508
	Property and equipment, net	—			8,011			30,206			—			38,217
	Trade names, net	—			10,231			95,320			—			105,551
	Patent and patent licenses, net	—			886			24,041			—			24,927
	Customer relationships, net	—			2,206			161,560			—			163,766
	Goodwill	—			52,131			583,544			—			635,675
	Other purchased intangibles, net	—			4,276			13,280			—			17,556
	Investment in subsidiaries	826,289			900,681			8,716			(1,735,686		)	—
	Other assets	9,328			1,368			2,123			—			12,819
	Total assets	$	1,277,786		$	1,168,711		$	1,180,757		$	(1,922,052	)	$	1,705,202
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	2,834			28,414			64,062			—			95,310
	Deferred revenue	—			23,091			40,366			—			63,457
	Deferred income taxes	—			—			342			—			342
	Capital lease, current	—			—			258			—			258
	Intercompany payable	76,366			—			110,000			(186,366		)	—
	Total current liabilities	79,200			51,505			215,028			(186,366		)	159,367
	Long-term debt	347,163			246,187			—			—			593,350
	Capital lease, non-current	—			—			141			—			141
	Liability for uncertain tax positions	—			37,551			—			—			37,551
	Deferred income taxes	21,728			(1,837		)	42,069			—			61,960
	Deferred revenue, non-current	—			8,187			1,995			—			10,182
	Other long-term liabilities	744			829			20,843			—			22,416
	Total liabilities	448,835			342,422			280,076			(186,366		)	884,967
	Common stock, $0.01 par value	474			—			—			—			474
	Additional paid-in capital	273,304			232,340			421,676			(654,016		)	273,304
	Retained earnings	555,158			584,591			495,505			(1,081,670		)	553,584
	Accumulated other comprehensive income (loss)	15			9,358			(16,500		)	—			(7,127		)
	Total stockholders’ equity	828,951			826,289			900,681			(1,735,686		)	820,235
	Total liabilities and stockholders’ equity	$	1,277,786		$	1,168,711		$	1,180,757		$	(1,922,052	)	$	1,705,202
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED BALANCE SHEET
	31-Dec-13
	(In thousands except share and per share data)
	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	—			741,843			—			(741,843		)	—
Deferred income taxes	—			202			1,643			—			1,845
Other assets	—			1,578			1,835			—			3,413
Total assets	$	—		$	1,061,778		$	838,287		$	(746,276	)	$	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	—			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, non-current	—			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	—			216,872			326,983			(326,983		)	216,872
Retained earnings	—			482,540			417,136			(414,826		)	484,850
Accumulated other comprehensive loss	—			6,545			(2,310		)	—			4,235
Total stockholders’ equity	—			706,418			741,843			(741,843		)	706,418
Total liabilities and stockholders’ equity	$	—		$	1,061,778		$	838,287		$	(746,276	)	$	1,153,789
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF INCOME
Year Ended December 31, 2014
(In thousands, except share and per share data)
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	227,860		$	412,217		$	(41,047	)	$	599,030
Cost of revenues	—			51,391			95,386			(40,788		)	105,989
Gross profit	—			176,469			316,831			(259		)	493,041
Operating expenses:
Sales and marketing	—			36,414			105,812			(259		)	141,967
Research, development and engineering	—			14,055			16,625			—			30,680
General and administrative	6,401			30,300			97,487			—			134,188
Total operating expenses	6,401			80,769			219,924			(259		)	306,835
Income from operations	(6,401		)	95,700			96,907			—			186,206
Equity earnings in Subsidiaries	135,838			77,051			—			(212,889		)	—
Interest expense (income), net	10,442			20,478			284			—			31,204
Other expense (income), net	(23		)	141			(283		)	—			(165		)
Income before income taxes	119,018			152,132			96,906			(212,889		)	155,167
Income tax expense	(6,309		)	16,294			19,855			—			29,840
Net income	125,327			135,838			77,051			(212,889		)	125,327
Less net loss attributable to noncontrolling interest	—			—			—			—			—
Less extinguishment of Series A preferred stock	(991		)	—			—			—			(991		)
Net income attributable to j2 Global, Inc. common shareholders	$	124,336		$	135,838		$	77,051		$	(212,889	)	$	124,336
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF INCOME
Year Ended December 31, 2013
(In thousands, except share and per share data)
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	255,413		$	369,079		$	(103,691	)	$	520,801
Cost of revenues	—			84,655			105,480			(103,242		)	86,893
Gross profit	—			170,758			263,599			(449		)	433,908
Operating expenses:
Sales and marketing	—			41,555			90,211			(449		)	131,317
Research, development and engineering	—			12,977			12,508			—			25,485
General and administrative	—			37,634			64,049			—			101,683
Total operating expenses	—			92,166			166,768			(449		)	258,485
Income from operations	—			78,592			96,831			—			175,423
Equity earnings in Subsidiaries	—			61,551			—			(61,551		)	—
Interest expense (income), net	—			9,292			11,962			—			21,254
Other expense (income), net	—			(369		)	11,841			—			11,472
Income before income taxes	—			131,220			73,028			(61,551		)	142,697
Income tax expense	—			23,698			11,477			—			35,175
Net income	—			107,522			61,551			(61,551		)	107,522
Less net loss attributable to noncontrolling interest	—			—			—			—			—
Net income attributable to j2 Global, Inc. common shareholders	$	—		$	107,522		$	61,551		$	(61,551	)	$	107,522
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF INCOME
Year Ended December 31, 2012
(In thousands, except share and per share data)
	j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Revenues:
Total revenues	$	—		$	222,203		$	206,045		$	(56,852	)	$	371,396
Cost of revenues	—			85,826			38,039			(56,852		)	67,013
Gross profit	—			136,377			168,006			—			304,383
Operating expenses:
Sales and marketing	—			35,677			27,148			—			62,825
Research, development and engineering	—			11,878			6,746			—			18,624
General and administrative	—			35,558			25,214			—			60,772
Total operating expenses	—			83,113			59,108			—			142,221
Income from operations	—			53,264			108,898			—			162,162
Equity earnings in Subsidiaries	—			91,539			—			(91,539		)	—
Interest expense (income), net	—			3,911			3,739			—			7,650
Other expense (income), net	—			(168		)	(242		)	—			(410		)
Income before income taxes	—			141,060			105,401			(91,539		)	154,922
Income tax expense	—			19,480			13,779			—			33,259
Net income	—			121,580			91,622			(91,539		)	121,663
Less net loss attributable to noncontrolling interest	—			—			83			—			83
Net income attributable to j2 Global, Inc. common shareholders	$	—		$	121,580		$	91,539		$	(91,539	)	$	121,580
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Year Ended December 31, 2014
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	125,327		$	135,838		$	77,051		$	(212,889	)	$	125,327
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			(478		)	(14,216		)	—			(14,694		)
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	15			3,307			10			—			3,332
Other comprehensive income (loss), net of tax	15			2,829			(14,206		)	—			(11,362		)
Comprehensive income (loss)	$	125,342		$	138,667		$	62,845		$	(212,889	)	$	113,965
Net loss attributable to noncontrolling interest	—			—			—			—			—
Comprehensive income attributable to j2 Global, Inc.	$	125,342		$	138,667		$	62,845		$	(212,889	)	$	113,965
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Year Ended December 31, 2013
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	—		$	107,522		$	61,551		$	(61,551	)	$	107,522
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			(43		)	121			—			78
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			4,249			(4		)	—			4,245
Other comprehensive income, net of tax	—			4,206			117			—			4,323
Comprehensive income	$	—		$	111,728		$	61,668		$	(61,551	)	$	111,845
Net loss attributable to noncontrolling interest	—			—			—			—			—
Comprehensive income attributable to j2 Global, Inc.	$	—		$	111,728		$	61,668		$	(61,551	)	$	111,845
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Year Ended December 31, 2012
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Net income	$	—		$	121,580		$	91,622		$	(91,539	)	$	121,663
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax expense (benefit)	—			521			914			—			1,435
Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			1,960			(6		)	—			1,954
Other comprehensive income, net of tax	—			2,481			908			—			3,389
Comprehensive income	—			124,061			92,530			(91,539		)	125,052
Net loss attributable to noncontrolling interest	—			—			83			—			83
Comprehensive income attributable to j2 Global, Inc.	$	—		$	124,061		$	92,447		$	(91,539	)	$	124,969
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CASH FLOWS
Year Ended December 31, 2014
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Cash flows from operating activities:
Net income	$	125,327		$	135,838		$	77,051		$	(212,889	)	$	125,327
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	—			6,047			56,906			—			62,953
Accretion and amortization of discount and premium of investments	392			722			220			—			1,334
Amortization of financing costs and discounts	4,297			748			—			—			5,045
Share-based compensation	2,353			5,325			1,230			—			8,908
Excess tax benefits from share-based compensation	(86		)	(4,803		)	(623		)	—			(5,512		)
Provision for doubtful accounts	—			2,114			2,588			—			4,702
Equity earnings in subsidiaries	(135,838		)	(77,051		)	—			212,889			—
Deferred income taxes	(1,392		)	(5,767		)	(2,874		)	—			(10,033		)
(Gain) Loss on disposal of fixed assets	—			—			—			—			—
(Gain) loss on available-for-sale investment	26			(58		)	(58		)				(90		)
Changes in assets and liabilities, net of effects of business combinations:
Decrease (increase) in:
Accounts receivable	—			(2,490		)	(8,588		)	—			(11,078		)
Prepaid expenses and other current assets	(776		)	(8,757		)	6,321			—			(3,212		)
Other assets	—			—			(42		)	—			(42		)
Increase (decrease) in:
Accounts payable and accrued expenses	2,835			(1,173		)	(7,109		)	—			(5,447		)
Income taxes payable	2,055			17,384			(8,642		)	—			10,797
Deferred revenue	—			(2,067		)	1,356			—			(711		)
Liability for uncertain tax positions	—			(6,311		)	(2		)	—			(6,313		)
Other long-term liabilities	742			(157		)	18			—			603
Net cash (used in) provided by operating activities	(65		)	59,544			117,752			—			177,231
Cash flows from investing activities:
Maturity of certificates of deposit	—			8,210			6,310			—			14,520
Purchase of certificates of deposit	—			—			(65		)	—			(65		)
Sales of available-for-sale investments	40,211			53,563			16,589			—			110,363
Purchase of available-for-sale investments	(81,061		)	(57,391		)	—			—			(138,452		)
Purchases of property and equipment	—			(2,866		)	(8,963		)	—			(11,829		)
Proceeds from sale of assets	—			608			—			—			608
Acquisition of businesses, net of cash received	—			(2,083		)	(243,195		)	—			(245,278		)
Purchases of intangible assets	—			(2,949		)	(2,387		)	—			(5,336		)
Investment in subsidiaries	—			(23,821		)	—			23,821			—
Net cash (used in) provided by investing activities	(40,850		)	(26,729		)	(231,711		)	23,821			(275,469		)
Cash flows from financing activities:
Issuance of long-term debt	402,500			—			—			—			402,500
Debt issuance cost	(11,991		)	—			—			—			(11,991		)
Repurchases of common and restricted stock	(930		)	(4,733		)	—			—			(5,663		)
Issuance of common stock under employee stock purchase plan	142			123			—			—			265
Exercise of stock options	1,374			5,193			54			—			6,621
Mandatorily redeemable preferred stock	—			—			—			—			—
Dividends paid	(26,967		)	(25,302		)	—			—			(52,269		)
Excess tax benefits from share-based compensation	86			4,803			623			—			5,512
Deferred payments for acquisitions	—			—			(16,512		)	—			(16,512		)
Other	—			—			(933		)	—			(933		)
Intercompany	(96,509		)	(10,495		)	130,825			(23,821		)	—
Net cash (used in) provided by financing activities	267,705			(30,411		)	114,057			(23,821		)	327,530
Effect of exchange rate changes on cash and cash equivalents	—			—			(3,430		)	—			(3,430		)
Net change in cash and cash equivalents	226,790			2,404			(3,332		)	—			225,862
Cash and cash equivalents at beginning of period	—			34,406			173,395			—			207,801
Cash and cash equivalents at end of period	$	226,790		$	36,810		$	170,063		$	—		$	433,663
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CASH FLOWS
Year Ended December 31, 2013
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Cash flows from operating activities:
Net income	$	—		$	107,522		$	61,551		$	(61,551	)	$	107,522
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	—			9,201			30,587			—			39,788
Accretion and amortization of discount and premium of investments	—			1,273			523			—			1,796
Amortization of financing costs and discounts	—			613			—			—			613
Share-based compensation	—			9,720			—			—			9,720
Excess tax benefits from share-based compensation	—			(2,695		)	—			—			(2,695		)
Provision for doubtful accounts	—			1,219			1,916			—			3,135
Equity earnings in subsidiaries	—			(61,551		)	—			61,551			—
Deferred income taxes	—			(495		)	745			—			250
(Gain) Loss on disposal of fixed assets	—			—			8			—			8
(Gain) loss on available-for-sale investment	—			(51		)	117						66
Loss on extinguishment of debt and related interest expense	—			—			14,437			—			14,437
Changes in assets and liabilities, net of effects of business combinations:
Decrease (increase) in:
Accounts receivable	—			(1,656		)	(7,932		)	—			(9,588		)
Prepaid expenses and other current assets	—			784			(635		)	—			149
Other assets	—			(57		)	225			—			168
Increase (decrease) in:
Accounts payable and accrued expenses	—			(124		)	9,250			—			9,126
Income taxes payable	—			(923		)	1,590			—			667
Deferred revenue	—			13,415			(1,047		)	—			12,368
Liability for uncertain tax positions	—			6,184			2			—			6,186
Other long-term liabilities	—			(88		)	(304		)	—			(392		)
Net cash provided by operating activities	—			82,291			111,033			—			193,324
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	—			124,745			15,381			—			140,126
Purchase of available-for-sale investments	—			(149,748		)	(19,153		)	—			(168,901		)
Purchases of property and equipment	—			(6,223		)	(12,404		)	—			(18,627		)
Proceeds from sale of assets	—			1			—			—			1
Acquisition of businesses, net of cash received	—			(4,043		)	(122,298		)	—			(126,341		)
Purchases of intangible assets	—			(3,034		)	(11,166		)	—			(14,200		)
Investment in subsidiaries	—			(14,920		)	—			14,920			—
Other	—			3,281			(3,281		)	—			—
Net cash (used in) provided by investing activities	—			(36,046		)	(146,272		)	14,920			(167,398		)
Cash flows from financing activities:
Issuance of long-term debt	—			—			—			—			—
Debt issuance costs	—			(47		)	—			—			(47		)
Repurchases of common stock and restricted stock	—			(4,587		)	—			—			(4,587		)
Issuance of common stock under employee stock purchase plan	—			213			—			—			213
Exercise of stock options	—			13,604			—			—			13,604
Mandatorily redeemable preferred stock	—			—			—						—
Dividends paid	—			(45,134		)	—			—			(45,134		)
Excess tax benefits from share-based compensation	—			2,695			—			—			2,695
Deferred payments for acquisitions	—			—			—			—			—
Other	—			—			(2,437		)	—			(2,437		)
Intercompany	—			(55,295		)	70,215			(14,920		)	—
Net cash (used in) provided by financing activities	—			(88,551		)	67,778			(14,920		)	(35,693		)
Effect of exchange rate changes on cash and cash equivalents	—			—			(1,112		)	—			(1,112		)
Net change in cash and cash equivalents	—			(42,306		)	31,427			—			(10,879		)
Cash and cash equivalents at beginning of period	—			76,712			141,968			—			218,680
Cash and cash equivalents at end of period	$	—		$	34,406		$	173,395		$	—		$	207,801
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CASH FLOWS
Year Ended December 31, 2012
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Cash flows from operating activities:
Net income	$	—		$	121,580		$	91,622		$	(91,539	)	$	121,663
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	—			8,590			13,574			—			22,164
Accretion and amortization of discount and premium of investments	—			1,461			142			—			1,603
Amortization of financing costs and discounts	—			249			—			—			249
Share-based compensation	—			9,132			—			—			9,132
Excess tax benefits from share-based compensation	—			(961		)	—			—			(961		)
Provision for doubtful accounts	—			293			3,996			—			4,289
Equity earnings in subsidiaries	—			(91,539		)	—			91,539			—
Deferred income taxes	—			4,839			(3,689		)	—			1,150
(Gain) Loss on disposal of fixed assets	—			54			—			—			54
(Gain) loss on available-for-sale investment	—			(266		)	—						(266		)
Loss on extinguishment of debt and related interest expense	—			—			—			—			—
Changes in assets and liabilities, net of effects of business combinations:
Decrease (increase) in:
Accounts receivable	—			(822		)	(4,595		)	—			(5,417		)
Prepaid expenses and other current assets	—			(1,265		)	(763		)	—			(2,028		)
Other assets	—			123			(366		)				(243		)
Increase (decrease) in:
Accounts payable and accrued expenses	—			10,599			(5,461		)	—			5,138
Income taxes payable	—			2,193			1,946			—			4,139
Deferred revenue	—			878			734			—			1,612
Liability for uncertain tax positions	—			7,601			—			—			7,601
Other long-term liabilities	—			99			(67		)	—			32
Net cash provided by operating activities	—			72,838			97,073			—			169,911
Cash flows from investing activities:
Maturity of certificates of deposit	—			8,000			—			—			8,000
Purchase of certificates of deposit	—			(22,106		)	(12,567		)	—			(34,673		)
Sales of available-for-sale investments	—			138,709			—			—			138,709
Purchase of available-for-sale investments	—			(139,087		)	(12,902		)	—			(151,989		)
Purchases of property and equipment	—			(2,677		)	(2,384		)	—			(5,061		)
Proceeds from sale of assets	—			136			20			—			156
Acquisition of businesses, net of cash received	—			(1,811		)	(196,530		)	—			(198,341		)
Purchases of intangible assets	—			(4,433		)	(1,862		)	—			(6,295		)
Investment in subsidiaries	—			(171,562		)	—			171,562			—
Other	—			—			—			—			—
Net cash (used in) provided by investing activities	—			(194,831		)	(226,225		)	171,562			(249,494		)
Cash flows from financing activities:
Issuance of long-term debt	—			245,000			—			—			245,000
Debt issuance cost	—			(1,384		)	—			—			(1,384		)
Repurchases of common and restricted stock	—			(60,282		)	—			—			(60,282		)
Issuance of common stock under employee stock purchase plan	—			157			—			—			157
Exercise of stock options	—			5,646			—						5,646
Mandatorily redeemable preferred stock	—			—			8,557			—			8,557
Dividends paid	—			(40,263		)	—			—			(40,263		)
Excess tax benefits from share-based compensation	—			961			—			—			961
Deferred payments for acquisitions	—			—			—			—			—
Other	—			—			—			—			—
Intercompany	—			3,746			167,816			(171,562		)	—
Net cash (used in) provided by financing activities	—			153,581			176,373			(171,562		)	158,392
Effect of exchange rate changes on cash and cash equivalents	—			—			512			—			512
Net change in cash and cash equivalents	—			31,588			47,733			—			79,321
Cash and cash equivalents at beginning of period	—			45,124			94,235			—			139,359
Cash and cash equivalents at end of period	$	—		$	76,712		$	141,968		$	—		$	218,680
Condensed Balance Sheet [Table Text Block]	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED BALANCE SHEET
	31-Dec-14
	(In thousands except share and per share data)
	BALANCE SHEET	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	ASSETS
	Cash and cash equivalents	226,790			36,810			170,063			—			433,663
	Short-term investments	47,880			48,261			65			—			96,206
	Accounts receivable, net	—			11,167			80,532			—			91,699
	Prepaid expenses and other current assets	776			12,689			9,137			—			22,602
	Deferred income taxes	1,271			—			742			—			2,013
	Intercompany receivable	110,000			74,938			1,428			(186,366		)	—
	Total current assets	386,717			183,865			261,967			(186,366		)	646,183
	Long-term investments	55,452			5,056			—			—			60,508
	Property and equipment, net	—			8,011			30,206			—			38,217
	Trade names, net	—			10,231			95,320			—			105,551
	Patent and patent licenses, net	—			886			24,041			—			24,927
	Customer relationships, net	—			2,206			161,560			—			163,766
	Goodwill	—			52,131			583,544			—			635,675
	Other purchased intangibles, net	—			4,276			13,280			—			17,556
	Investment in subsidiaries	826,289			900,681			8,716			(1,735,686		)	—
	Other assets	9,328			1,368			2,123			—			12,819
	Total assets	$	1,277,786		$	1,168,711		$	1,180,757		$	(1,922,052	)	$	1,705,202
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	2,834			28,414			64,062			—			95,310
	Deferred revenue	—			23,091			40,366			—			63,457
	Deferred income taxes	—			—			342			—			342
	Capital lease, current	—			—			258			—			258
	Intercompany payable	76,366			—			110,000			(186,366		)	—
	Total current liabilities	79,200			51,505			215,028			(186,366		)	159,367
	Long-term debt	347,163			246,187			—			—			593,350
	Capital lease, non-current	—			—			141			—			141
	Liability for uncertain tax positions	—			37,551			—			—			37,551
	Deferred income taxes	21,728			(1,837		)	42,069			—			61,960
	Deferred revenue, non-current	—			8,187			1,995			—			10,182
	Other long-term liabilities	744			829			20,843			—			22,416
	Total liabilities	448,835			342,422			280,076			(186,366		)	884,967
	Common stock, $0.01 par value	474			—			—			—			474
	Additional paid-in capital	273,304			232,340			421,676			(654,016		)	273,304
	Retained earnings	555,158			584,591			495,505			(1,081,670		)	553,584
	Accumulated other comprehensive income (loss)	15			9,358			(16,500		)	—			(7,127		)
	Total stockholders’ equity	828,951			826,289			900,681			(1,735,686		)	820,235
	Total liabilities and stockholders’ equity	$	1,277,786		$	1,168,711		$	1,180,757		$	(1,922,052	)	$	1,705,202
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED BALANCE SHEET
	31-Dec-13
	(In thousands except share and per share data)
	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	—			741,843			—			(741,843		)	—
Deferred income taxes	—			202			1,643			—			1,845
Other assets	—			1,578			1,835			—			3,413
Total assets	$	—		$	1,061,778		$	838,287		$	(746,276	)	$	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	—			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, non-current	—			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	—			216,872			326,983			(326,983		)	216,872
Retained earnings	—			482,540			417,136			(414,826		)	484,850
Accumulated other comprehensive loss	—			6,545			(2,310		)	—			4,235
Total stockholders’ equity	—			706,418			741,843			(741,843		)	706,418
Total liabilities and stockholders’ equity	$	—		$	1,061,778		$	838,287		$	(746,276	)	$	1,153,789
Condensed Income Statement [Table Text Block]	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED STATEMENT OF INCOME
	Year Ended December 31, 2014
	(In thousands, except share and per share data)
		j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Revenues:
	Total revenues	$	—		$	227,860		$	412,217		$	(41,047	)	$	599,030
	Cost of revenues	—			51,391			95,386			(40,788		)	105,989
	Gross profit	—			176,469			316,831			(259		)	493,041
	Operating expenses:
	Sales and marketing	—			36,414			105,812			(259		)	141,967
	Research, development and engineering	—			14,055			16,625			—			30,680
	General and administrative	6,401			30,300			97,487			—			134,188
	Total operating expenses	6,401			80,769			219,924			(259		)	306,835
	Income from operations	(6,401		)	95,700			96,907			—			186,206
	Equity earnings in Subsidiaries	135,838			77,051			—			(212,889		)	—
	Interest expense (income), net	10,442			20,478			284			—			31,204
	Other expense (income), net	(23		)	141			(283		)	—			(165		)
	Income before income taxes	119,018			152,132			96,906			(212,889		)	155,167
	Income tax expense	(6,309		)	16,294			19,855			—			29,840
	Net income	125,327			135,838			77,051			(212,889		)	125,327
	Less net loss attributable to noncontrolling interest	—			—			—			—			—
	Less extinguishment of Series A preferred stock	(991		)	—			—			—			(991		)
	Net income attributable to j2 Global, Inc. common shareholders	$	124,336		$	135,838		$	77,051		$	(212,889	)	$	124,336
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED STATEMENT OF INCOME
	Year Ended December 31, 2013
	(In thousands, except share and per share data)
		j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Revenues:
	Total revenues	$	—		$	255,413		$	369,079		$	(103,691	)	$	520,801
	Cost of revenues	—			84,655			105,480			(103,242		)	86,893
	Gross profit	—			170,758			263,599			(449		)	433,908
	Operating expenses:
	Sales and marketing	—			41,555			90,211			(449		)	131,317
	Research, development and engineering	—			12,977			12,508			—			25,485
	General and administrative	—			37,634			64,049			—			101,683
	Total operating expenses	—			92,166			166,768			(449		)	258,485
	Income from operations	—			78,592			96,831			—			175,423
	Equity earnings in Subsidiaries	—			61,551			—			(61,551		)	—
	Interest expense (income), net	—			9,292			11,962			—			21,254
	Other expense (income), net	—			(369		)	11,841			—			11,472
	Income before income taxes	—			131,220			73,028			(61,551		)	142,697
	Income tax expense	—			23,698			11,477			—			35,175
	Net income	—			107,522			61,551			(61,551		)	107,522
	Less net loss attributable to noncontrolling interest	—			—			—			—			—
	Net income attributable to j2 Global, Inc. common shareholders	$	—		$	107,522		$	61,551		$	(61,551	)	$	107,522
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED STATEMENT OF INCOME
	Year Ended December 31, 2012
	(In thousands, except share and per share data)
		j2 Global, Inc.			j2 Cloud Services, Inc			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Revenues:
	Total revenues	$	—		$	222,203		$	206,045		$	(56,852	)	$	371,396
	Cost of revenues	—			85,826			38,039			(56,852		)	67,013
	Gross profit	—			136,377			168,006			—			304,383
	Operating expenses:
	Sales and marketing	—			35,677			27,148			—			62,825
	Research, development and engineering	—			11,878			6,746			—			18,624
	General and administrative	—			35,558			25,214			—			60,772
	Total operating expenses	—			83,113			59,108			—			142,221
	Income from operations	—			53,264			108,898			—			162,162
	Equity earnings in Subsidiaries	—			91,539			—			(91,539		)	—
	Interest expense (income), net	—			3,911			3,739			—			7,650
Other expense (income), net	—			(168		)	(242		)	—			(410		)
Income before income taxes	—			141,060			105,401			(91,539		)	154,922
Income tax expense	—			19,480			13,779			—			33,259
Net income	—			121,580			91,622			(91,539		)	121,663
Less net loss attributable to noncontrolling interest	—			—			83			—			83
Net income attributable to j2 Global, Inc. common shareholders	$	—		$	121,580		$	91,539		$	(91,539	)	$	121,580
Condensed Comprehensive Income Statement [Table Text Block]	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
	Year Ended December 31, 2014
	(In thousands)
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Net income	$	125,327		$	135,838		$	77,051		$	(212,889	)	$	125,327
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment, net of tax expense (benefit)	—			(478		)	(14,216		)	—			(14,694		)
	Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	15			3,307			10			—			3,332
	Other comprehensive income (loss), net of tax	15			2,829			(14,206		)	—			(11,362		)
	Comprehensive income (loss)	$	125,342		$	138,667		$	62,845		$	(212,889	)	$	113,965
	Net loss attributable to noncontrolling interest	—			—			—			—			—
	Comprehensive income attributable to j2 Global, Inc.	$	125,342		$	138,667		$	62,845		$	(212,889	)	$	113,965
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
	Year Ended December 31, 2013
	(In thousands)
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Net income	$	—		$	107,522		$	61,551		$	(61,551	)	$	107,522
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment, net of tax expense (benefit)	—			(43		)	121			—			78
	Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			4,249			(4		)	—			4,245
	Other comprehensive income, net of tax	—			4,206			117			—			4,323
	Comprehensive income	$	—		$	111,728		$	61,668		$	(61,551	)	$	111,845
	Net loss attributable to noncontrolling interest	—			—			—			—			—
	Comprehensive income attributable to j2 Global, Inc.	$	—		$	111,728		$	61,668		$	(61,551	)	$	111,845
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
	Year Ended December 31, 2012
	(In thousands)
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Net income	$	—		$	121,580		$	91,622		$	(91,539	)	$	121,663
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment, net of tax expense (benefit)	—			521			914			—			1,435
	Unrealized gain (loss) on available-for-sale investments, net of tax expense (benefit)	—			1,960			(6		)	—			1,954
	Other comprehensive income, net of tax	—			2,481			908			—			3,389
	Comprehensive income	—			124,061			92,530			(91,539		)	125,052
	Net loss attributable to noncontrolling interest	—			—			83			—			83
	Comprehensive income attributable to j2 Global, Inc.	$	—		$	124,061		$	92,447		$	(91,539	)	$	124,969
Condensed Cash Flow Statement [Table Text Block]	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED STATEMENT OF CASH FLOWS
	Year Ended December 31, 2014
	(In thousands)
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Cash flows from operating activities:
	Net income	$	125,327		$	135,838		$	77,051		$	(212,889	)	$	125,327
	Adjustments to reconcile net earnings to net cash provided by operating activities:
	Depreciation and amortization	—			6,047			56,906			—			62,953
	Accretion and amortization of discount and premium of investments	392			722			220			—			1,334
	Amortization of financing costs and discounts	4,297			748			—			—			5,045
	Share-based compensation	2,353			5,325			1,230			—			8,908
	Excess tax benefits from share-based compensation	(86		)	(4,803		)	(623		)	—			(5,512		)
	Provision for doubtful accounts	—			2,114			2,588			—			4,702
	Equity earnings in subsidiaries	(135,838		)	(77,051		)	—			212,889			—
	Deferred income taxes	(1,392		)	(5,767		)	(2,874		)	—			(10,033		)
	(Gain) Loss on disposal of fixed assets	—			—			—			—			—
	(Gain) loss on available-for-sale investment	26			(58		)	(58		)				(90		)
	Changes in assets and liabilities, net of effects of business combinations:
	Decrease (increase) in:
	Accounts receivable	—			(2,490		)	(8,588		)	—			(11,078		)
	Prepaid expenses and other current assets	(776		)	(8,757		)	6,321			—			(3,212		)
	Other assets	—			—			(42		)	—			(42		)
	Increase (decrease) in:
	Accounts payable and accrued expenses	2,835			(1,173		)	(7,109		)	—			(5,447		)
	Income taxes payable	2,055			17,384			(8,642		)	—			10,797
	Deferred revenue	—			(2,067		)	1,356			—			(711		)
	Liability for uncertain tax positions	—			(6,311		)	(2		)	—			(6,313		)
	Other long-term liabilities	742			(157		)	18			—			603
	Net cash (used in) provided by operating activities	(65		)	59,544			117,752			—			177,231
	Cash flows from investing activities:
	Maturity of certificates of deposit	—			8,210			6,310			—			14,520
	Purchase of certificates of deposit	—			—			(65		)	—			(65		)
	Sales of available-for-sale investments	40,211			53,563			16,589			—			110,363
	Purchase of available-for-sale investments	(81,061		)	(57,391		)	—			—			(138,452		)
	Purchases of property and equipment	—			(2,866		)	(8,963		)	—			(11,829		)
	Proceeds from sale of assets	—			608			—			—			608
	Acquisition of businesses, net of cash received	—			(2,083		)	(243,195		)	—			(245,278		)
	Purchases of intangible assets	—			(2,949		)	(2,387		)	—			(5,336		)
	Investment in subsidiaries	—			(23,821		)	—			23,821			—
	Net cash (used in) provided by investing activities	(40,850		)	(26,729		)	(231,711		)	23,821			(275,469		)
	Cash flows from financing activities:
	Issuance of long-term debt	402,500			—			—			—			402,500
	Debt issuance cost	(11,991		)	—			—			—			(11,991		)
	Repurchases of common and restricted stock	(930		)	(4,733		)	—			—			(5,663		)
	Issuance of common stock under employee stock purchase plan	142			123			—			—			265
	Exercise of stock options	1,374			5,193			54			—			6,621
	Mandatorily redeemable preferred stock	—			—			—			—			—
	Dividends paid	(26,967		)	(25,302		)	—			—			(52,269		)
	Excess tax benefits from share-based compensation	86			4,803			623			—			5,512
	Deferred payments for acquisitions	—			—			(16,512		)	—			(16,512		)
	Other	—			—			(933		)	—			(933		)
	Intercompany	(96,509		)	(10,495		)	130,825			(23,821		)	—
	Net cash (used in) provided by financing activities	267,705			(30,411		)	114,057			(23,821		)	327,530
	Effect of exchange rate changes on cash and cash equivalents	—			—			(3,430		)	—			(3,430		)
	Net change in cash and cash equivalents	226,790			2,404			(3,332		)	—			225,862
	Cash and cash equivalents at beginning of period	—			34,406			173,395			—			207,801
	Cash and cash equivalents at end of period	$	226,790		$	36,810		$	170,063		$	—		$	433,663
	j2 GLOBAL, INC. AND SUBSIDIARIES
	CONSOLIDATED STATEMENT OF CASH FLOWS
	Year Ended December 31, 2013
	(In thousands)
		j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
	Cash flows from operating activities:
Net income	$	—		$	107,522		$	61,551		$	(61,551	)	$	107,522
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	—			9,201			30,587			—			39,788
Accretion and amortization of discount and premium of investments	—			1,273			523			—			1,796
Amortization of financing costs and discounts	—			613			—			—			613
Share-based compensation	—			9,720			—			—			9,720
Excess tax benefits from share-based compensation	—			(2,695		)	—			—			(2,695		)
Provision for doubtful accounts	—			1,219			1,916			—			3,135
Equity earnings in subsidiaries	—			(61,551		)	—			61,551			—
Deferred income taxes	—			(495		)	745			—			250
(Gain) Loss on disposal of fixed assets	—			—			8			—			8
(Gain) loss on available-for-sale investment	—			(51		)	117						66
Loss on extinguishment of debt and related interest expense	—			—			14,437			—			14,437
Changes in assets and liabilities, net of effects of business combinations:
Decrease (increase) in:
Accounts receivable	—			(1,656		)	(7,932		)	—			(9,588		)
Prepaid expenses and other current assets	—			784			(635		)	—			149
Other assets	—			(57		)	225			—			168
Increase (decrease) in:
Accounts payable and accrued expenses	—			(124		)	9,250			—			9,126
Income taxes payable	—			(923		)	1,590			—			667
Deferred revenue	—			13,415			(1,047		)	—			12,368
Liability for uncertain tax positions	—			6,184			2			—			6,186
Other long-term liabilities	—			(88		)	(304		)	—			(392		)
Net cash provided by operating activities	—			82,291			111,033			—			193,324
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	—			124,745			15,381			—			140,126
Purchase of available-for-sale investments	—			(149,748		)	(19,153		)	—			(168,901		)
Purchases of property and equipment	—			(6,223		)	(12,404		)	—			(18,627		)
Proceeds from sale of assets	—			1			—			—			1
Acquisition of businesses, net of cash received	—			(4,043		)	(122,298		)	—			(126,341		)
Purchases of intangible assets	—			(3,034		)	(11,166		)	—			(14,200		)
Investment in subsidiaries	—			(14,920		)	—			14,920			—
Other	—			3,281			(3,281		)	—			—
Net cash (used in) provided by investing activities	—			(36,046		)	(146,272		)	14,920			(167,398		)
Cash flows from financing activities:
Issuance of long-term debt	—			—			—			—			—
Debt issuance costs	—			(47		)	—			—			(47		)
Repurchases of common stock and restricted stock	—			(4,587		)	—			—			(4,587		)
Issuance of common stock under employee stock purchase plan	—			213			—			—			213
Exercise of stock options	—			13,604			—			—			13,604
Mandatorily redeemable preferred stock	—			—			—						—
Dividends paid	—			(45,134		)	—			—			(45,134		)
Excess tax benefits from share-based compensation	—			2,695			—			—			2,695
Deferred payments for acquisitions	—			—			—			—			—
Other	—			—			(2,437		)	—			(2,437		)
Intercompany	—			(55,295		)	70,215			(14,920		)	—
Net cash (used in) provided by financing activities	—			(88,551		)	67,778			(14,920		)	(35,693		)
Effect of exchange rate changes on cash and cash equivalents	—			—			(1,112		)	—			(1,112		)
Net change in cash and cash equivalents	—			(42,306		)	31,427			—			(10,879		)
Cash and cash equivalents at beginning of period	—			76,712			141,968			—			218,680
Cash and cash equivalents at end of period	$	—		$	34,406		$	173,395		$	—		$	207,801
j2 GLOBAL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CASH FLOWS
Year Ended December 31, 2012
(In thousands)
	j2 Global, Inc.			j2 Cloud Services, Inc.			Non-guarantor Subsidiaries			Consolidating Adjustments			j2 Global Consolidated
Cash flows from operating activities:
Net income	$	—		$	121,580		$	91,622		$	(91,539	)	$	121,663
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	—			8,590			13,574			—			22,164
Accretion and amortization of discount and premium of investments	—			1,461			142			—			1,603
Amortization of financing costs and discounts	—			249			—			—			249
Share-based compensation	—			9,132			—			—			9,132
Excess tax benefits from share-based compensation	—			(961		)	—			—			(961		)
Provision for doubtful accounts	—			293			3,996			—			4,289
Equity earnings in subsidiaries	—			(91,539		)	—			91,539			—
Deferred income taxes	—			4,839			(3,689		)	—			1,150
(Gain) Loss on disposal of fixed assets	—			54			—			—			54
(Gain) loss on available-for-sale investment	—			(266		)	—						(266		)
Loss on extinguishment of debt and related interest expense	—			—			—			—			—
Changes in assets and liabilities, net of effects of business combinations:
Decrease (increase) in:
Accounts receivable	—			(822		)	(4,595		)	—			(5,417		)
Prepaid expenses and other current assets	—			(1,265		)	(763		)	—			(2,028		)
Other assets	—			123			(366		)				(243		)
Increase (decrease) in:
Accounts payable and accrued expenses	—			10,599			(5,461		)	—			5,138
Income taxes payable	—			2,193			1,946			—			4,139
Deferred revenue	—			878			734			—			1,612
Liability for uncertain tax positions	—			7,601			—			—			7,601
Other long-term liabilities	—			99			(67		)	—			32
Net cash provided by operating activities	—			72,838			97,073			—			169,911
Cash flows from investing activities:
Maturity of certificates of deposit	—			8,000			—			—			8,000
Purchase of certificates of deposit	—			(22,106		)	(12,567		)	—			(34,673		)
Sales of available-for-sale investments	—			138,709			—			—			138,709
Purchase of available-for-sale investments	—			(139,087		)	(12,902		)	—			(151,989		)
Purchases of property and equipment	—			(2,677		)	(2,384		)	—			(5,061		)
Proceeds from sale of assets	—			136			20			—			156
Acquisition of businesses, net of cash received	—			(1,811		)	(196,530		)	—			(198,341		)
Purchases of intangible assets	—			(4,433		)	(1,862		)	—			(6,295		)
Investment in subsidiaries	—			(171,562		)	—			171,562			—
Other	—			—			—			—			—
Net cash (used in) provided by investing activities	—			(194,831		)	(226,225		)	171,562			(249,494		)
Cash flows from financing activities:
Issuance of long-term debt	—			245,000			—			—			245,000
Debt issuance cost	—			(1,384		)	—			—			(1,384		)
Repurchases of common and restricted stock	—			(60,282		)	—			—			(60,282		)
Issuance of common stock under employee stock purchase plan	—			157			—			—			157
Exercise of stock options	—			5,646			—						5,646
Mandatorily redeemable preferred stock	—			—			8,557			—			8,557
Dividends paid	—			(40,263		)	—			—			(40,263		)
Excess tax benefits from share-based compensation	—			961			—			—			961
Deferred payments for acquisitions	—			—			—			—			—
Other	—			—			—			—			—
Intercompany	—			3,746			167,816			(171,562		)	—
Net cash (used in) provided by financing activities	—			153,581			176,373			(171,562		)	158,392
Effect of exchange rate changes on cash and cash equivalents	—			—			512			—			512
Net change in cash and cash equivalents	—			31,588			47,733			—			79,321
Cash and cash equivalents at beginning of period	—			45,124			94,235			—			139,359
Cash and cash equivalents at end of period	$	—		$	76,712		$	141,968		$	—		$	218,680

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2014								Dec. 31, 2013
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 years ended December 31, 2014 and 2013 (in thousands):
										Unrealized Gains (Losses) on Investments			Foreign Currency Translation			Total
									Balance as of January 1, 2013	$	1,811		$	(1,899	)	$	(88	)
									Other comprehensive income (loss) before reclassifications	4,236			(10		)	4,226
									Amounts reclassified from accumulated other comprehensive income	9			88			97
									Net increase in other comprehensive income	4,245			78			4,323
									Balance as of December 31, 2013	$	6,056		$	(1,821	)	$	4,235
									Other comprehensive income (loss) before reclassifications	3,346			(14,694		)	(11,348		)
									Amounts reclassified from accumulated other comprehensive income	(14		)	—			(14		)
									Net increase (decrease) in other comprehensive income	3,332			(14,694		)	(11,362		)
									Balance as of December 31, 2014	$	9,388		$	(16,515	)	$	(7,127	)
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 years ended December 31, 2014 and 2013 (in thousands):
	Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from Accumulated Other Comprehensive Income						Affected Line Item in the Statement of Income
		Year Ended December 31, 2013			Year Ended December 31, 2014
	Cumulative translation adjustment	$	116		$	—		Other expense (income), net
		116			—			Total, before income taxes
		(28		)	—			Income tax expense (benefit)
		$	88		$	—		Total, net of tax
	Unrealized gain (loss) on available-for-sale investments	$	14		$	(23	)	Other expense (income), net
		14			(23		)	Total, before income taxes
		(5		)	9			Income tax expense (benefit)
		9			(14		)	Total, net of tax
	Total reclassifications for the period	$	97		$	(14	)	Total, net of tax

Quarterly_Results_Tables

Quarterly Results (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Results [Abstract]
Schedule of Quarterly Financial Information [Table Text Block]
		Year Ended December 31, 2014
		Fourth		Third		Second		First
		Quarter		Quarter		Quarter		Quarter
	Revenues	$	167,144	$	153,018	$	144,744	$	134,124
	Gross profit		138,145		124,974		119,186		110,736
	Net income		32,754		28,759		35,049		28,765
	Net income attributable to j2 Global, Inc. common shareholders		31,763		28,759		35,049		28,765
	Net income per common share:
	Basic	$	0.66	$	0.6	$	0.73	$	0.61
	Diluted	$	0.66	$	0.6	$	0.73	$	0.6
	Weighted average shares outstanding
	Basic		47,146,503		46,845,477		46,745,596		46,365,158
	Diluted		47,468,841		47,163,912		47,067,767		46,765,732
		Year Ended December 31, 2013
		Fourth		Third		Second		First
		Quarter		Quarter		Quarter		Quarter
	Revenues	$	138,035	$	127,788	$	141,361	$	113,617
	Gross profit		115,857		105,987		118,682		93,382
	Net income		20,754		27,806		36,040		22,922
	Net income attributable to j2 Global, Inc. common shareholders		20,754		27,806		36,040		22,922
	Net income per common share:
	Basic	$	0.45	$	0.6	$	0.78	$	0.5
	Diluted	$	0.44	$	0.59	$	0.77	$	0.49
	Weighted average shares outstanding
	Basic		45,867,769		45,729,171		45,428,230		45,160,140
	Diluted		46,382,363		46,291,631		46,018,245		45,668,167

Unrestricted_Subsidiaries_Tabl

Unrestricted Subsidiaries (Tables)	12 Months Ended
	Dec. 31, 2014
Unrestricted Subsidiaries [Abstract]
Schedule of Unrestricted Subsidiaries Financial Information [Table Text Block]	The consolidated financial position of the Unrestricted Subsidiaries as of December 31, 2014 is as follows (in thousands):
		December 31, 2014
	ASSETS
	Cash and cash equivalents	$	27,944
	Accounts receivable	57,005
	Prepaid expenses and other current assets	2,986
	Deferred income taxes	5,292
	Total current assets	93,227
	Property and equipment, net	12,834
	Trade names, net	70,310
	Patent and patent licenses, net	24,007
	Customer relationships, net	55,925
	Goodwill	245,613
	Other purchased intangibles, net	8,901
	Deferred income taxes	—
	Other assets	1,706
	Total assets	$	512,523
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Accounts payable and accrued expenses	$	40,296
	Income taxes payable	316
	Deferred revenue	5,277
	Total current liabilities	45,889
	Long-term debt	110,000
	Deferred income taxes	17,397
	Other long-term liabilities	16,243
	Mandatorily redeemable financial instrument	—
	Total liabilities	189,529
	Additional paid-in capital	317,932
	Retained earnings	6,051
	Accumulated other comprehensive loss	(989		)
	Total stockholders’ equity	322,994
	Total equity	322,994
	Total liabilities and stockholders’ equity	$	512,523
	The consolidated results of operations of the Unrestricted Subsidiaries for the year ended December 31, 2014 is as follows (in thousands):
		Year Ended December 31,
		2014
	Revenues	$	169,065
	Cost of revenues	19,028
	Gross profit	150,037
	Operating expenses:
	Sales and marketing	68,057
	Research, development and engineering	5,485
	General and administrative	52,768
	Total operating expenses	126,310
	Income from operations	23,727
	Other income (expenses):
	Interest expense (income), net	821
	Other expense (income), net	347
	Income before income taxes	22,559
	Income tax (benefit) expense	4,883
	Net income	17,676
	Less net income attributable to noncontrolling interest	—
	Net income attributable to common stockholders	$	17,676

Basis_Of_Presentation_Details

Basis Of Presentation (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax									($14,694,000)	$78,000	$1,435,000
Advertising Expense									60,500,000	55,400,000	48,100,000
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	-16,515,000				-1,821,000				-16,515,000	-1,821,000	-1,899,000
Revenues									599,030,000	520,801,000	371,396,000
Net earnings	31,763,000	28,759,000	35,049,000	28,765,000	20,754,000	27,806,000	36,040,000	22,922,000	124,336,000	107,522,000	121,580,000
Basic earnings per share	$0.66	$0.60	$0.73	$0.61	$0.45	$0.60	$0.78	$0.50	$2.60	$2.31	$2.63
Diluted earnings per share	$0.66	$0.60	$0.73	$0.60	$0.44	$0.59	$0.77	$0.49	$2.58	$2.28	$2.61
Foreign Currency Transaction Gain (Loss), Realized									($100,000)	$400,000	($100,000)
Minimum [Member]
Identifiable intangible assets minimum useful life (years)									1 year
Property, Plant and Equipment, Useful Life									1 year
Maximum [Member]
Identifiable intangible assets minimum useful life (years)									20 years
Property, Plant and Equipment, Useful Life									5 years

Business_Acquisition_Business_

Business Acquisition Business Acquisition (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Combination, Contingent Consideration, Liability	$45,300,000	$7,000,000	$2,500,000
Goodwill, Purchase Accounting Adjustments	-1,035,000
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount	89,400,000	36,600,000
Business Combination, Consideration Transferred, Liabilities Incurred		15,700,000
Deferred income taxes	-10,033,000	250,000	1,150,000
Goodwill, Acquired During Period	184,837,000	54,472,000
Business Acquisition Contributed Total Revenue	51,900,000	98,100,000
Business Combination, Consideration Transferred	300,240,000	147,745,000
Ookla [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	40,000,000
Business Combination, Contingent Consideration, Liability	15,000,000
Other Acquisitions [Member]
Business Acquisition Contributed Total Revenue			16,900,000
Business Combination, Consideration Transferred			32,900,000
Ziff Davis, Inc [Member]
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount			12,900,000
Business Combination, Consideration Transferred, Liabilities Incurred			28,800,000
Goodwill, Acquired During Period			112,882,000
Business Acquisition Contributed Total Revenue			9,700,000
Business Acquisition Contributed Net Income			1,600,000
Business Combination, Consideration Transferred			$171,652,000

Business_Acquisition_Business_1

Business Acquisition Business Acquisitions (Allocation Of Aggregate Purchase Price) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment	$10,022,000	$3,274,000
Business Acquisition Purchase Price Allocation Current Noncurrent Assets Prepaid Expense and Other Assets	5,500,000	2,703,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent	419,000	2,058,000
Goodwill, Acquired During Period	184,837,000	54,472,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	-29,182,000	-2,543,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	-14,338,000	-13,162,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Capital Lease Obligation	-1,361,000
Business Combination, Consideration Transferred	300,240,000	147,745,000
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount	89,400,000	36,600,000
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables	18,024,000	24,658,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	-12,328,000
Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	9,836,000	3,031,000
Media Content [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		2,460,000
Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	28,192,000	18,581,000
Customer Contracts [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	98,498,000	40,275,000
Advertiser Relationship [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		11,770,000
Other Intangible Assets [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	2,121,000	168,000
Ziff Davis, Inc [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment			842,000
Business Acquisition Purchase Price Allocation Current Noncurrent Assets Prepaid Expense and Other Assets			1,283,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent			1,139,000
Goodwill, Acquired During Period			112,882,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue			-2,188,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other			-4,767,000
Business Combination, Consideration Transferred			171,652,000
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount			12,900,000
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables			14,450,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent			-21,829,000
Ziff Davis, Inc [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			4,780,000
Ziff Davis, Inc [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			37,730,000
Ziff Davis, Inc [Member] | Customer Contracts [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			5,380,000
Ziff Davis, Inc [Member] | Advertiser Relationship [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			14,500,000
Ziff Davis, Inc [Member] | Licensing Relationship [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			4,910,000
Ziff Davis, Inc [Member] | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$2,540,000

Business_Acquisition_Business_2

Business Acquisition Business Acquisitions (Supplementary Information On Unaudited Pro Forma Financial Results Of Acquisition) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2014
2012 Business Acquisitions [Member]
Business Acquisition, Pro Forma Revenue	$417,250	$385,974
Business Acquisition, Pro Forma Net Income (Loss)	120,210	114,889
Business Acquisition, Pro Forma Earnings Per Share, Basic	$2.60	$2.47
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$2.58	$2.44
2013 Business Acquisitions [Member]
Business Acquisition, Pro Forma Revenue	470,190		545,952
Business Acquisition, Pro Forma Net Income (Loss)	122,187		108,600
Business Acquisition, Pro Forma Earnings Per Share, Basic	$2.64		$2.34
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$2.62		$2.31
2014 Business Acquisitions [Member]
Business Acquisition, Pro Forma Revenue			626,906	672,701
Business Acquisition, Pro Forma Net Income (Loss)			$132,480	$119,773
Business Acquisition, Pro Forma Earnings Per Share, Basic			$2.85	$2.51
Business Acquisition, Pro Forma Earnings Per Share, Diluted			$2.81	$2.49

Investments_Investments_Narrat

Investments Investments (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investments [Abstract]
Gain on Sale of Investments	$100,000	($100,000)	$300,000
Restricted Investments, Current	100,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	72,970,000	37,330,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$1,260,000	$2,040,000

Investments_Schedule_Of_Debt_S

Investments (Schedule Of Debt Securities By Contractual Maturity Date) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investments [Abstract]
Due within 1 year	$59,896	$46,339
Due within more than 1 year but less than 5 years	60,178	44,865
Due within more than 5 years but less than 10 years	0	0
Due 10 years or after	330	2,486
Total	$120,404	$93,690

Investments_Schedule_Of_Availa

Investments (Schedule Of Available-For-Sale And Trading Securities) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investments [Abstract]
Available-for-sale Securities	$156,649	$123,737
Certificates of Deposit, at Carrying Value	65	14,403
Investments	$156,714	$138,140

Investments_Summary_Of_Gross_U

Investments (Summary Of Gross Unrealized Gains And Losses And Fair Values) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$141,003	$114,179
Available-for-sale Securities, Gross Unrealized Gains	15,795	9,716
Available-for-sale Securities, Gross Unrealized Losses	-149	-158
Available-for-sale Securities	156,649	123,737
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	91,456	66,587
Available-for-sale Securities, Gross Unrealized Gains	147	134
Available-for-sale Securities, Gross Unrealized Losses	-136	-29
Available-for-sale Securities	91,467	66,692
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	26,848	23,689
Available-for-sale Securities, Gross Unrealized Gains	9	20
Available-for-sale Securities, Gross Unrealized Losses	-13	-7
Available-for-sale Securities	26,844	23,702
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	2,088	3,293
Available-for-sale Securities, Gross Unrealized Gains	5	4
Available-for-sale Securities, Gross Unrealized Losses	0	-1
Available-for-sale Securities	2,093	3,296
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	20,611	20,610
Available-for-sale Securities, Gross Unrealized Gains	15,634	9,558
Available-for-sale Securities, Gross Unrealized Losses	0	-121
Available-for-sale Securities	$36,245	$30,047

Investments_Investments_Summar

Investments Investments (Summary of Unrealized Loss by 12 month Period) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investments Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$72,970	$37,330
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-144	-153
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,260	2,040
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-5	-5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	74,230	39,370
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-149	-158
Corporate Debt Securities [Member]
Investments Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	57,898	9,944
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-131	-4
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,260	1,263
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-5	-3
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	59,158	11,207
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-136	-7
US Treasury and Government [Member]
Investments Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		109
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		-1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		109
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		-1
US States and Political Subdivisions Debt Securities [Member]
Investments Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	15,072	26,445
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-13	-28
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	777
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	-2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	15,072	27,222
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-13	-30
Equity Securities [Member]
Investments Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		832
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		-120
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		832
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		($120)

Fair_Value_Measurements_Fair_V

Fair Value Measurements Fair Value Measurements (Narrative) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Fair Value Disclosures [Abstract]
Long-term Debt	$593,350,000	$245,670,000
Long-term Debt, Fair Value	$711,100,000	$283,300,000

Fair_Value_Measurements_Schedu

Fair Value Measurements (Schedule Of Fair Values Of Financial Instruments Measured On Recurring Basis) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Total assets	$421,166	$262,144
Business Combination, Contingent Consideration, Liability	45,300	7,000	2,500
Derivative Liability, Fair Value, Gross Liability	742
Financial Liabilities Fair Value Disclosure	15,742
Money Market Funds [Member]
Cash	212,645	101,231
Bank Time Deposits [Member]
Cash	51,807	22,773
Certificates of Deposit [Member]
Investments	65	14,403
Equity Securities [Member]
Investments	36,245	30,047
US Treasury and Government [Member]
Investments	26,844	23,702
US States and Political Subdivisions Debt Securities [Member]
Investments	2,093	3,296
Corporate Debt Securities [Member]
Investments	91,467	66,692
Level 1 [Member]
Total assets	248,890	262,144
Business Combination, Contingent Consideration, Liability	0
Derivative Liability, Fair Value, Gross Liability	0
Financial Liabilities Fair Value Disclosure	0
Level 1 [Member] | Money Market Funds [Member]
Cash	212,645	101,231
Level 1 [Member] | Bank Time Deposits [Member]
Cash	0	22,773
Level 1 [Member] | Certificates of Deposit [Member]
Investments	0	14,403
Level 1 [Member] | Equity Securities [Member]
Investments	36,245	30,047
Level 1 [Member] | US Treasury and Government [Member]
Investments	0	23,702
Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member]
Investments	0	3,296
Level 1 [Member] | Corporate Debt Securities [Member]
Investments	0	66,692
Level 2 [Member]
Total assets	172,276	0
Business Combination, Contingent Consideration, Liability	0
Derivative Liability, Fair Value, Gross Liability	742
Financial Liabilities Fair Value Disclosure	742
Level 2 [Member] | Money Market Funds [Member]
Cash	0	0
Level 2 [Member] | Bank Time Deposits [Member]
Cash	51,807	0
Level 2 [Member] | Certificates of Deposit [Member]
Investments	65	0
Level 2 [Member] | Equity Securities [Member]
Investments	0	0
Level 2 [Member] | US Treasury and Government [Member]
Investments	26,844	0
Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Investments	2,093	0
Level 2 [Member] | Corporate Debt Securities [Member]
Investments	91,467	0
Level 3 [Member]
Total assets	0	0
Business Combination, Contingent Consideration, Liability	15,000
Derivative Liability, Fair Value, Gross Liability	0
Financial Liabilities Fair Value Disclosure	15,000
Level 3 [Member] | Money Market Funds [Member]
Cash	0	0
Level 3 [Member] | Bank Time Deposits [Member]
Cash	0	0
Level 3 [Member] | Certificates of Deposit [Member]
Investments	0	0
Level 3 [Member] | Equity Securities [Member]
Investments	0	0
Level 3 [Member] | US Treasury and Government [Member]
Investments	0	0
Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member]
Investments	0	0
Level 3 [Member] | Corporate Debt Securities [Member]
Investments	0	0
Ookla [Member]
Business Combination, Contingent Consideration, Liability	$15,000

Property_And_Equipment_Propert

Property And Equipment Property And Equipment (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property And Equipment [Abstract]
Depreciation	$15.50	$9.60	$6.20
Property, Plant and Equipment, Disposals	$0.60	$0.90	$0.90

Property_And_Equipment_Propert1

Property And Equipment Property And Equipment (Property And Equipment) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$111,398	$86,699
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	-73,181	-55,499
Property and equipment, net	38,217	31,200
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	100,537	79,576
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,763	1,405
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$9,098	$5,718

Goodwill_And_Intangible_Assets2

Goodwill And Intangible Assets (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Goodwill	$635,675,000	$457,422,000
Amortization expense	47,400,000	30,200,000	16,000,000
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	390,063,000	316,682,000	294,943,000
Digital Media Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	$245,612,000	$140,740,000	$112,882,000

Goodwill_And_Intangible_Assets3

Goodwill And Intangible Assets (Changes In Carrying Amounts Of Goodwill And Other Intangible Assets) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
Balance at beginning period	$457,422,000
Goodwill, Acquired During Period	184,837,000	54,472,000
Goodwill, Purchase Accounting Adjustments	-1,035,000
Foreign Exchange Translation	-5,549,000
Balance at ending period	635,675,000	457,422,000
Business Cloud Services Segment [Member]
Goodwill [Line Items]
Balance at beginning period	316,682,000	294,943,000
Goodwill, Acquired During Period	79,536,000	21,551,000
Goodwill, Purchase Accounting Adjustments	-706,000		-259,000
Foreign Exchange Translation	-5,449,000	447,000
Balance at ending period	390,063,000	316,682,000	294,943,000
Digital Media Segment [Member]
Goodwill [Line Items]
Balance at beginning period	140,740,000	112,882,000
Goodwill, Acquired During Period	105,301,000	32,921,000
Goodwill, Purchase Accounting Adjustments	-329,000		-5,065,000
Foreign Exchange Translation	-100,000	2,000
Balance at ending period	$245,612,000	$140,740,000	$112,882,000

Goodwill_And_Intangible_Assets4

Goodwill And Intangible Assets (Indefinite Intangible Assets) (Details) (USD $)	Dec. 31, 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 $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Historical Cost	$416,494	$282,868
Accumulated Amortization	-137,505	-92,146
Net	278,989	190,722
Trade Names [Member]
Historical Cost	94,770	66,911
Accumulated Amortization	-16,598	-11,182
Net	78,172	55,729
Weighted-Average Amortization Period, years	14 years 6 months	17 years
Patents And Patent Licenses [Member]
Historical Cost	62,940	58,446
Accumulated Amortization	-38,013	-29,916
Net	24,927	28,530
Weighted-Average Amortization Period, years	9 years	8 years 1 month 6 days
Customer Contracts [Member]
Historical Cost	230,424	139,362
Accumulated Amortization	-66,658	-38,382
Net	163,766	100,980
Weighted-Average Amortization Period, years	9 years 3 months 18 days	8 years 1 month 6 days
Other Purchased Intangibles [Member]
Historical Cost	28,360	18,149
Accumulated Amortization	-16,236	-12,666
Net	$12,124	$5,483
Weighted-Average Amortization Period, years	4 years 3 months 18 days	5 years

Goodwill_And_Intangible_Assets6

Goodwill And Intangible Assets Goodwill And Intangible Assets (Intangible Assets Subject To Amortization) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Estimated future amortization expense in year 2015	$56,349
Estimated future amortization expense in year 2016	50,380
Estimated future amortization expense in year 2017	42,081
Estimated future amortization expense in year 2018	28,940
Estimated future amortization expense in year 2019	22,137
Estimated future amortization expense thereafter	79,102
Finite-Lived Intangible Assets, Net	278,989	190,722
Patents And Patent Licenses [Member]
Finite-Lived Intangible Assets, Net	$24,927	$28,530

Long_Term_Debt_Details

Long Term Debt (Details) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Jul. 26, 2012	Jun. 10, 2014
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$653,000,000			$653,000,000
Debt Instrument, Unamortized Discount					5,000,000
Interest Expense	32,500,000	22,300,000	9,000,000
Long-term Debt	593,350,000	245,670,000		593,350,000
Long-term Debt, Current Maturities	0			0
Total long-term debt, less current portion	593,350,000			593,350,000
Long-term Debt, Fair Value	711,100,000	283,300,000		711,100,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	26-Jul-12
Debt Instrument, Face Amount	250,000,000			250,000,000
Debt Instrument, Interest Rate, Stated Percentage	8.00%			8.00%
Debt Instrument, Maturity Date	1-Aug-20
Proceeds from Debt, Net of Issuance Costs	245,000,000
Debt Instrument, Unamortized Discount	3,800,000			3,800,000
Unamortized Debt Issuance Expense	1,100,000			1,100,000
Debt Instrument, Frequency of Periodic Payment				semi-annually
Debt Instrument, Call Date, Earliest	1-Aug-16
Debt Instrument, Covenant Description	The indenture governing the Senior Notes contain certain restrictive and other covenants applicable to j2 Cloud Services, Inc. and subsidiaries designated as restricted subsidiaries including, but not limited to, limitations on debt and disqualified or preferred stock, restricted payments, liens, sale and leaseback transactions, dividends and other payment restrictions, asset sales and transactions with affiliates.
Long-term Debt	246,187,000			246,187,000
Long-term Debt, Fair Value	262,400,000			262,400,000
Convertible Debt Securities [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	10-Jun-14
Debt Instrument, Face Amount	403,000,000			403,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.25%			3.25%
Debt Instrument, Maturity Date	15-Jun-29
Proceeds from Debt, Net of Issuance Costs	391,000,000
Debt Instrument, Unamortized Discount	55,300,000			55,300,000		59,000,000
Debt Instrument, Convertible, Remaining Discount Amortization Period	6 years 6 months
Debt Issuance Cost	11,700,000
Unamortized Debt Issuance Expense	9,300,000			9,300,000
Debt Instrument, Frequency of Periodic Payment				semiannually
Debt Instrument, Convertible, Carrying Amount of Equity Component						37,700,000
Long-term Debt	347,200,000			347,200,000
Long-term Debt, Fair Value	448,700,000			448,700,000
Interest Expense, Debt	$11,700,000

Long_Term_Debt_Long_Term_Debt_

Long Term Debt Long Term Debt (Schedule Of Maturities Of Long-term Debt) (Details) (USD $)	Dec. 31, 2014
Long-term Debt, Unclassified [Abstract]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$0
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	0
Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	652,500,000
Long-term Debt	$653,000,000

Mandatorily_Redeemable_Financi1

Mandatorily Redeemable Financial Instrument (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Mandatorily Redeemable Financial Instrument [Abstract]
Loss on extinguishment of debt and related interest expense	$0	$14,437	$0

Commitments_And_Contingencies_1

Commitments And Contingencies Commitments And Contingencies (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Capital Leases, Income Statement, Amortization Expense	$0.40	$0	$0
Operating Leases, Rent Expense, Net	9.7	7.7	3.2
Operating Leases, Rent Expense, Sublease Rentals	0.1
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals	$2.40

Commitments_And_Contingencies_2

Commitments And Contingencies Commitment And Contingencies (Capital Lease Summary) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Commitments and Contingencies [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	$314
Capital Leased Assets, Gross	805	0
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	-440	0
Capital Leases, Balance Sheet, Assets by Major Class, Net	365	0
Capital Leases, Future Minimum Payments Due in Two Years	77
Capital Leases, Future Minimum Payments Due in Three Years	8
Capital Leases, Future Minimum Payments Due in Four Years	0
Capital Leases, Future Minimum Payments Due in Five Years	0
Capital Leases, Future Minimum Payments Due Thereafter	0
Capital Leases, Future Minimum Payments Due	$399

Commitments_And_Contingencies_3

Commitments And Contingencies Commitments And Contingencies (Summary Of Future Minimum Lease Payments Under Non-Cancelable Operating Leases) (Details) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Commitments and Contingencies [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$9,025
Operating Leases, Future Minimum Payments, Due in Two Years	7,737
Operating Leases, Future Minimum Payments, Due in Three Years	5,412
Operating Leases, Future Minimum Payments, Due in Four Years	4,734
Operating Leases, Future Minimum Payments, Due in Five Years	3,251
Operating Leases, Future Minimum Payments, Due Thereafter	1,161
Operating Leases, Future Minimum Payments Due	$31,320

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Income Taxes [Line Items]
Deferred Tax Assets, Net of Valuation Allowance	$31,833,000	$21,685,000
Deferred Tax Assets, Valuation Allowance	-11,358,000	-8,493,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	11,100,000	7,800,000
Deferred Tax Assets, Tax Credit Carryforwards, Research	2,000,000	1,000,000
Liability for Uncertain Tax Positions, Current	0	5,535,000
U.S. federal statutory rate	35.00%	35.00%	35.00%
Effective income tax rate	19.20%	24.70%	21.50%
Income before income taxes, domestic operations	79,400,000	61,000,000	54,200,000
Income before income taxes, foreign operations	75,800,000	81,700,000	100,700,000
Liabilities for uncertain income tax positions	34,635,000	40,888,000	35,421,000	28,366,000
Cash paid for income taxes	49,500,000	28,300,000	20,400,000
Prepaid tax payments	5,800,000	11,300,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	2,900,000	3,000,000	2,300,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	-100,000	700,000	500,000
Undistributed Earnings of Foreign Subsidiaries	436,600,000
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	3,765,000	6,928,000	6,590,000
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	-9,808,000	-1,519,000	-557,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	32,700,000	40,900,000	35,400,000
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Valuation Allowance	11,100,000	7,700,000
California Franchise Tax Board [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination				2011	2010	2009
Internal Revenue Service (IRS) [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards	20,500,000
Operating Loss Carryforwards, Expiration Dates	31-Dec-31
Income Tax Examination, Year under Examination				2011	2010	2009
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards, Expiration Dates	31-Dec-24
Tax Credit Carryforward, Amount	$900,000	$500,000
Canada Revenue Agency [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination				2011	2010
Illinois Department of Revenue [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination						2009	2008
New York City Department of Finance [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination				2011	2010	2009

Income_Taxes_Income_Taxes_Comp

Income Taxes Income Taxes (Components Of Income Tax) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Current Federal Tax Expense (Benefit)	$22,074	$22,834	$20,759
Current State and Local Tax Expense (Benefit)	3,822	2,676	-289
Current Foreign Tax Expense (Benefit)	13,977	9,415	11,639
Current Income Tax Expense (Benefit)	39,873	34,925	32,109
Deferred Federal Income Tax Expense (Benefit)	-958	3,678	2,427
Deferred State and Local Income Tax Expense (Benefit)	-5,019	-235	314
Deferred Foreign Income Tax Expense (Benefit)	-4,056	-3,193	-1,591
Deferred income taxes	-10,033	250	1,150
Income tax expense	$29,840	$35,175	$33,259

Income_Taxes_Income_Taxes_Reco

Income Taxes Income Taxes (Reconciliation Of Statutory Federal Income Tax Rate With Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
U.S. federal statutory rate	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes	0.60%	0.30%	0.50%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential	-13.80%	-17.90%	-17.00%
Effective Income Tax Rate Reconciliation, Tax Contingencies, Reserve	-2.20%	4.30%	4.90%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance	2.60%	1.90%	3.20%
Effective Income Tax Rate Reconciliation, Deductions, Qualified Production Activities	-0.50%	-0.50%	-3.00%
Effective Income Tax Rate Reconciliation, Other Adjustments	-2.50%	1.60%	-1.30%
Effective Income Tax Rate, Continuing Operations	19.20%	24.70%	21.50%

Income_Taxes_Income_Taxes_Defe

Income Taxes Income Taxes (Deferred Tax Assets And Liabilities) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Income Taxes [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards	$13,774	$9,596
Deferred Tax Assets, Tax Credit Carryforwards	14,091	9,233
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	7,114	1,196
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts	1,132	1,423
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	3,632	4,917
Deferred Tax Assets, Property, Plant and Equipment	0	1,266
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses	76	161
Deferred Tax Assets, Gain On Sale Of Intangible Assets	0	123
Deferred Tax Assets, Deferred Income	250	812
Deferred Tax Assets, State Taxes	2,333	1,451
Deferred Tax Assets, Other	789		0
Deferred Tax Assets, Gross	43,191	30,178
Deferred Tax Assets, Valuation Allowance	-11,358	-8,493
Deferred Tax Assets, Net of Valuation Allowance	31,833	21,685
Deferred Tax Liabilities, Property, Plant and Equipment	-5,883	0
Deferred Tax Liabilities, Intangible Assets	-51,566	-47,711
Deferred Tax Liabilities, Prepaid Insurance	-420	-369
Deferred Tax Liability, Convertible Debt	-26,272	0
Deferred Tax Liabilities, Foreign Other	-7,981	-6,359
Deferred Tax Liabilities, Net	-92,122	-54,439
Deferred Tax Assets, Net	($60,289)	($32,754)

Income_Taxes_Income_Taxes_Reco1

Income Taxes Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Unrecognized Tax Benefits	$34,635	$40,888	$35,421	$28,366
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	919	58	1,022
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	-9,808	-1,519	-557
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	3,765	6,928	6,590
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	($1,129)	$0	$0

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	0 Months Ended					12 Months Ended
	Feb. 10, 2015	Oct. 30, 2014	Aug. 05, 2014	7-May-14	Feb. 12, 2014	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2013
Class of Stock [Line Items]
Preferred Stock, Par or Stated Value Per Share						$0.01		$0.01
Preferred Stock, Value, Issued						$5,064,000
Stock Repurchased							2,100,000
Aggregate cost for repurchase of common stock							$58,600,000
Shares surrendered to pay exercise price or satisfy tax withholding obligations for stock options exercised/restricted stock						113,256
Dividend amount to be paid, per common share	$0.29	$0.28	$0.28	$0.27	$0.26
Dividend, declaration date	10-Feb-15	30-Oct-14	5-Aug-14	7-May-14	11-Feb-14
Dividend, date to be paid	9-Mar-15	4-Dec-14	2-Sep-14	3-Jun-14	10-Mar-14
Dividend, date of record	23-Feb-15	17-Nov-14	18-Aug-14	19-May-14	24-Feb-14
2012 Repurchase Program [Member]
Class of Stock [Line Items]
Maximum number of shares authorized to be repurchased						5,000,000

Stock_Options_And_Employee_Sto2

Stock Options And Employee Stock Purchase Plan (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Estimated forfeiture rate	12.31%	14.44%	14.58%
Allocated Share-based Compensation Expense	$8,908,000	$9,720,000	$9,132,000
Weighted-average grant date fair value of options granted			$7.92
Number of options outstanding	725,649	1,175,657	1,765,461	2,087,695
Number of options granted	0	0	67,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	14,600,000	11,900,000	4,500,000
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Vested In Period, Total Fair Value	2,300,000	3,100,000	4,700,000
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options	6,600,000	13,600,000	5,600,000
Number of Shares, Exercisable	618,437
Weighted-Average Exercise Price, Exercisable	$23.77
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	5,200,000	3,900,000	1,600,000
Weighted-Average Exercise Price, Granted	$0	$0	$27.26
Weighted-Average Remaining Contractual Term, Outstanding (in years)	3 years 10 months 17 days
Dividends, Share-based Compensation	84,370
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	3 years 10 months 17 days
Stock Options [Member]
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	800,000
Restricted Stock And Restricted Stock Unit (RSU) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value	8,500,000	6,400,000	4,300,000
Shares, Granted	265,601	729,137	390,210
Allocated Share-based Compensation Expense	7,400,000	7,100,000	5,200,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	24,100,000
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	$5,000,000	$1,400,000	$300,000
Employee Stock Purchase Plan [Member]
Market value of common stock on the date of grant for incentive stock options	95.00%
Maximum issuance of common stock	2,000,000
Maximum earnings withheld by the employees	15.00%
Number of shares purchased under the plan	5,735	5,402	5,797
Number of shares available for issuance	1,634,464
Restricted Stock [Member]
Shares, Granted	226,864	690,762
Number of stocks outstanding	814,050	1,178,371	828,475
Weighted-Average Grant-Date Fair Value, Granted	$45.66	$13.57
Restricted Stock Units (RSUs) [Member]
Shares, Granted	38,737	38,375
Number of stocks outstanding	102,924	109,725	115,466
Nineteen Hundred Ninety Seven Stock Oprtion Plan [Member]
Additional shares authorized for issuance	840,000
Maximum issuance of common stock	12,000,000
2007 Stock Plan [Member]
Maximum issuance of common stock	4,500,000
Number of shares available for issuance	163,309
Nineteen Ninety Seven Stock Option Plan And Two Thousand Seven Stock Plan [Member]
Expiration period of options granted (in years)	10
Number of Shares, Exercisable		845,198	1,132,365
Weighted-Average Exercise Price, Exercisable		$20.35	$21.94
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Ziff Davis, Inc. 2012 Equity Incentive Plan [Member]
Shares, Granted	13,035,000
Maximum issuance of common stock	15,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Weighted-Average Grant-Date Fair Value, Granted	$0
Minimum [Member] | Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased	$43.08
Minimum [Member] | 2007 Stock Plan [Member]
Market value of common stock on the date of grant for incentive stock options	85.00%
Maximum [Member] | Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased	$51.38

Stock_Options_And_Employee_Sto3

Stock Options And Employee Stock Purchase Plan (Stock Options) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Number of Shares, Outstanding Beginning of Period	1,175,657	1,765,461	2,087,695
Number of options granted	0	0	67,000
Number of Shares, Exercised	433,008	569,204	357,234
Number of Shares, Canceled	17,000	20,600	32,000
Number of Shares, Outstanding Ending of Period	725,649	1,175,657	1,765,461
Number of Shares, Exercisable	618,437
Number of Shares, Vested and expected to vest	714,319
Weighted-Average Exercise Price, Outstanding Beginning of Period	$21.08	$22.08	$20.99
Weighted-Average Exercise Price, Granted	$0	$0	$27.26
Weighted-Average Exercise Price, Exercised	$15.70	$23.90	$15.81
Weighted-Average Exercise Price, Canceled	$29.85	$21.79	$31.34
Weighted-Average Exercise Price, Outstanding Ending of Period	$24.29	$21.08	$22.08
Weighted-Average Exercise Price, Exercisable	$23.77
Weighted-Average Exercise Price, Vested and expected to vest	$24.24
Weighted-Average Remaining Contractual Term, Outstanding (in years)	3 years 10 months 17 days
Weighted-Average Remaining Contractual Term, Exercisable (in years)	3 years 5 months 9 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest (in years)	3 years 9 months 29 days
Aggregate Intrinsic Value, Outstanding	$27,362,157
Aggregate Intrinsic Value, Exercisable	23,642,294
Aggregate Intrinsic Value, Vested and expected to vest	26,975,686
Aggregate intrinsic values of options exercised	14,600,000	11,900,000	4,500,000
Stock Options [Member]
Unrecognized compensation cost related to non-vested awards granted	$800,000
Weighted-average period to recognize compensation cost (in years)	1 year 5 months 1 day

Stock_Options_And_Employee_Sto4

Stock Options And Employee Stock Purchase Plan Stock Options And Employee Stock Purchase Plan (Outstanding And Exercisable Options) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	725,649
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	3 years 10 months 17 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$24.29
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	618,437
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$23.77
Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	49,283
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	4 years 2 months 5 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$17.19
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	49,283
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$17.19
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range	$17.19
Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	128,200
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	8 months 1 day
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$18.77
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	128,200
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$18.77
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range	$18.77
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$0
Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	77,448
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	3 years 4 months 2 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$20.91
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	77,448
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$20.91
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$20.91
Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	74,420
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	4 years 2 months 16 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$31.69
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	74,420
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$21.69
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range	$21.67
Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	98,716
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	5 years 4 months 6 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$22.92
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	76,780
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$22.92
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range	$22.92
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$0
Range Six [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	75,382
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	4 years 11 months 12 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$26.87
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	44,382
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$27.06
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$23.11
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$28.52
Range Seven [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	90,700
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	6 years 4 months 10 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$29.34
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	54,424
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$29.34
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$29.34
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$0
Range Eight [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	22,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	7 years 2 months 1 day
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$29.53
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	7,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$29.53
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$29.53
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$0
Range Nine [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	7,500
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	6 years 9 months 26 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$31.07
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	4,500
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$31.07
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$31.07
Range Ten [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	102,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	2 years 7 months 2 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$32.45
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	102,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price	$32.45
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$32.45

Stock_Options_And_Employee_Sto5

Stock Options And Employee Stock Purchase Plan (Assumptions To Estimate Fair Value Of Stock Options) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Estimated forfeiture rate	12.31%	14.44%	14.58%
Risk-free interest rate			1.10%
Expected term (in years)			5 years 8 months 23 days
Dividend yield			3.20%
Expected volatility			41.60%

Stock_Options_And_Employee_Sto6

Stock Options And Employee Stock Purchase Plan (Allocation Of Share-Based Compensation Expense) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allocated Share-based Compensation Expense	$8,908	$9,720	$9,132
Cost Of Revenues [Member]
Allocated Share-based Compensation Expense	345	756	844
Sales And Marketing [Member]
Allocated Share-based Compensation Expense	1,944	1,855	1,543
Research, Development And Engineering [Member]
Allocated Share-based Compensation Expense	721	434	459
General And Administrative [Member]
Allocated Share-based Compensation Expense	$5,898	$6,675	$6,286

Stock_Options_And_Employee_Sto7

Stock Options And Employee Stock Purchase Plan (Restricted Stock) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation cost recognized	$8,908,000	$9,720,000	$9,132,000
Allocated Share-based Compensation Expense	8,908,000	9,720,000	9,132,000
Restricted Stock And Restricted Stock Unit (RSU) [Member]
Compensation cost recognized	7,400,000	7,100,000	5,200,000
Allocated Share-based Compensation Expense	7,400,000	7,100,000	5,200,000
Shares, Granted	265,601	729,137	390,210
Unrecognized compensation cost related to non-vested awards granted	24,100,000
Restricted Stock [Member]
Shares, Nonvested at January 1, 2014	1,178,371	828,475
Shares, Granted	226,864	690,762
Shares, Vested	-546,115	-296,966
Shares, Canceled	-45,070	-43,900
Shares, Nonvested at December 31, 2014	814,050	1,178,371
Weighted-Average Grant-Date Fair Value, Nonvested at January 1, 2014	$17.86	$23.08
Weighted-Average Grant-Date Fair Value, Granted	$45.66	$13.57
Weighted-Average Grant-Date Fair Value, Vested	$15.63	$21.46
Weighted-Average Grant-Date Fair Value, Canceled	$35.55	$24.46
Weighted-Average Grant-Date Fair Value, Nonvested at December 31, 2014	$26.57	$17.86
Weighted-average period to recognize compensation cost (in years)	3 years 0 months 15 days
Restricted Stock Units (RSUs) [Member]
Shares, Nonvested at January 1, 2014	109,725	115,466
Shares, Granted	38,737	38,375
Shares, Vested	-19,598	11,116
Shares, Canceled	-25,940	33,000
Shares, Nonvested at December 31, 2014	102,924	109,725
Share Based Compensation Equity Awards Other Than Options Expected To Vest Shares	79,445
Weighted-average period to recognize compensation cost (in years)	3 years 6 months 11 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	2 years 0 months 26 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 10 months 13 days
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Intrinsic Value	4,925,584
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding, Aggregate Intrinsic Value	$6,381,288

Defined_Contribution_401k_Savi1

Defined Contribution 401(k) Savings Plan (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Contribution 401(k) Savings Plan [Abstract]
Defined Contribution Plan, Cost Recognized	$0.20	$0.10

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share Reconciliation [Abstract]
Net earnings attributable to j2 Global, Inc. common shareholders	$31,763	$28,759	$35,049	$28,765	$20,754	$27,806	$36,040	$22,922	$124,336	$107,522	$121,580
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic									2,590	2,105	2,075
Net earnings available to common shareholders									$121,746	$105,417	$119,505
Basic	47,146,503	46,845,477	46,745,596	46,365,158	45,867,769	45,729,171	45,428,230	45,160,140	46,778,015	45,548,767	45,459,712
Dilutive effect of equity incentive plans									328,523	591,252	321,946
Diluted	47,468,841	47,163,912	47,067,767	46,765,732	46,382,363	46,291,631	46,018,245	45,668,167	47,106,538	46,140,019	45,781,658
Basic	$0.66	$0.60	$0.73	$0.61	$0.45	$0.60	$0.78	$0.50	$2.60	$2.31	$2.63
Diluted	$0.66	$0.60	$0.73	$0.60	$0.44	$0.59	$0.77	$0.49	$2.58	$2.28	$2.61
Share options excluded from the computation of diluted earnings per share									0	0	527,319

Segment_Information_Details

Segment Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues	$599,030	$520,801	$371,396
United States	317,206	221,922
Total long-lived assets	317,206	221,922
UNITED STATES
Revenues	403,279	369,507	233,585
United States	216,099	170,247
Total long-lived assets	216,099	170,247
CANADA
Revenues	70,434	73,130	79,656
IRELAND
Revenues	42,979	41,398	41,248
All Other Countries [Member]
Revenues	82,338	36,766	16,907
United States	101,107	51,675
Total long-lived assets	$101,107	$51,675

Segment_Information_Reportable

Segment Information Reportable Segment Information (Reconciliation of Total Segment Operating Income to Consolidated Operating Income) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$599,030	$520,801	$371,396
Direct Costs By Segment	378,913	315,582	181,147
Operating Income (Loss)	186,206	175,423	162,162
Global Operating Costs	34,170	30,245	28,087
Business Cloud Services Segment [Member]
Segment Reporting Information [Line Items]
Revenues	431,475	390,104	361,684
Direct Costs By Segment	241,592	191,169	174,324
Operating Income (Loss)	189,883	198,935	187,360
Digital Media Segment [Member]
Segment Reporting Information [Line Items]
Revenues	167,814	131,146	9,712
Direct Costs By Segment	137,321	124,413	6,823
Operating Income (Loss)	30,493	6,733	2,889
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	-259	-449	0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	$220,376	$205,668	$190,249

Segment_Information_Reportable1

Segment Information Reportable Segment Information (Total Assets, Capital Expenditures, Depreciation And Amortization) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting, Other Significant Reconciling Item [Line Items]
Assets	$1,705,202	$1,153,789
Payments to Acquire Property, Plant, and Equipment	11,829	18,627	5,061
Property, Plant and Equipment, Additions	11,829	18,627	5,061
Depreciation, Depletion and Amortization, Nonproduction	62,953	39,788	22,152
Business Cloud Services Segment [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Assets	883,587	818,722
Payments to Acquire Property, Plant, and Equipment	6,639	10,979	4,240
Depreciation, Depletion and Amortization, Nonproduction	39,699	24,148	20,473
Digital Media Segment [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Assets	378,381	333,286
Payments to Acquire Property, Plant, and Equipment	4,920	6,635	380
Depreciation, Depletion and Amortization, Nonproduction	22,483	14,963	1,167
Operating Segments [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Assets	1,261,968	1,152,008
Payments to Acquire Property, Plant, and Equipment	11,559	17,614	4,620
Depreciation, Depletion and Amortization, Nonproduction	62,182	39,111	21,640
Corporate [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Assets	443,234	1,781
Payments to Acquire Property, Plant, and Equipment	270	1,013	441
Depreciation, Depletion and Amortization, Nonproduction	$771	$677	$512

Condensed_Consolidating_Financ2

Condensed Consolidating Financials Condensed Consolidating Balance Sheet (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash and cash equivalents	$433,663,000	$207,801,000	$218,680,000	$139,359,000
Short-term investments	96,206,000	90,789,000
Accounts Receivable, Net	91,699,000	67,245,000
Prepaid expenses and other current assets	22,602,000	20,064,000
Deferred income taxes	2,013,000	3,126,000
Due from Affiliate, Current	0	0
Assets, Current	646,183,000	389,025,000
Long-term investments	60,508,000	47,351,000
Property and equipment, net	38,217,000	31,200,000
Tradenames, net	105,551,000	83,108,000
Patent and patent licenses, net	24,927,000	28,530,000
Customer Relationships, Net	163,766,000	100,980,000
Goodwill	635,675,000	457,422,000
Other purchased intangibles, net	17,556,000	10,915,000
Investments in and Advances to Affiliates, Amount of Equity	0	0
Deferred income taxes	0	1,845,000
Other assets	12,819,000	3,413,000
Assets	1,705,202,000	1,153,789,000
Accounts payable and accrued expenses	95,310,000	69,570,000
Income taxes payable	0	1,569,000
Deferred revenue	63,457,000	36,326,000
Liability for Uncertain Tax Positions, Current	0	5,535,000
Deferred Tax Liabilities, Net, Current	342,000	1,892,000
Capital Lease Obligations, Current	258,000	0
Due to Affiliate, Current	0	0
Liabilities, Current	159,367,000	114,892,000
Long-term Debt	593,350,000	245,670,000
Capital Lease Obligations, Noncurrent	141,000	0
Liability for uncertain tax positions	37,551,000	38,329,000
Deferred income taxes	61,960,000	35,833,000
Deferred Revenue, Noncurrent	10,182,000	11,189,000
Other long-term liabilities	22,416,000	1,458,000
Liabilities	884,967,000	447,371,000
Commitments and contingencies	0	0
Preferred Stock, Value, Issued	5,064,000
Common Stock, Value, Issued	474,000	461,000
Additional paid-in capital	273,304,000	216,872,000
Retained earnings	553,584,000	484,850,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	-7,127,000	4,235,000	-88,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	820,235,000	706,418,000		554,375,000
Liabilities and Equity	1,705,202,000	1,153,789,000
Stockholders' Equity Attributable to Noncontrolling Interest	0	0		0
j2 Global, Inc. [Member]
Cash and cash equivalents	226,790,000	0	0	0
Short-term investments	47,880,000	0
Accounts Receivable, Net	0	0
Prepaid expenses and other current assets	776,000	0
Deferred income taxes	1,271,000	0
Due from Affiliate, Current	110,000,000	0
Assets, Current	386,717,000	0
Long-term investments	55,452,000	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	826,289,000	0
Deferred income taxes		0
Other assets	9,328,000	0
Assets	1,277,786,000	0
Accounts payable and accrued expenses	2,834,000	0
Income taxes payable		0
Deferred revenue	0	0
Liability for Uncertain Tax Positions, Current		0
Deferred Tax Liabilities, Net, Current	0	0
Capital Lease Obligations, Current	0
Due to Affiliate, Current	76,366,000	0
Liabilities, Current	79,200,000	0
Long-term Debt	347,163,000	0
Capital Lease Obligations, Noncurrent	0
Liability for uncertain tax positions	0	0
Deferred income taxes	21,728,000	0
Deferred Revenue, Noncurrent	0	0
Other long-term liabilities	744,000	0
Liabilities	448,835,000	0
Common Stock, Value, Issued	474,000	0
Additional paid-in capital	273,304,000	0
Retained earnings	555,158,000	0
Accumulated Other Comprehensive Income (Loss), Net of Tax	15,000	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	828,951,000	0
Liabilities and Equity	1,277,786,000	0
j2 Cloud Services, Inc. [Member]
Cash and cash equivalents	36,810,000	34,406,000	76,712,000	45,124,000
Short-term investments	48,261,000	67,848,000
Accounts Receivable, Net	11,167,000	11,541,000
Prepaid expenses and other current assets	12,689,000	16,662,000
Deferred income taxes	0	0
Due from Affiliate, Current	74,938,000	4,433,000
Assets, Current	183,865,000	134,890,000
Long-term investments	5,056,000	47,351,000
Property and equipment, net	8,011,000	11,232,000
Tradenames, net	10,231,000	12,119,000
Patent and patent licenses, net	886,000	15,107,000
Customer Relationships, Net	2,206,000	6,125,000
Goodwill	52,131,000	86,025,000
Other purchased intangibles, net	4,276,000	5,306,000
Investments in and Advances to Affiliates, Amount of Equity	900,681,000	741,843,000
Deferred income taxes		202,000
Other assets	1,368,000	1,578,000
Assets	1,168,711,000	1,061,778,000
Accounts payable and accrued expenses	28,414,000	29,419,000
Income taxes payable		0
Deferred revenue	23,091,000	23,762,000
Liability for Uncertain Tax Positions, Current		5,532,000
Deferred Tax Liabilities, Net, Current	0	906,000
Capital Lease Obligations, Current	0
Due to Affiliate, Current	0	0
Liabilities, Current	51,505,000	59,619,000
Long-term Debt	246,187,000	245,670,000
Capital Lease Obligations, Noncurrent	0
Liability for uncertain tax positions	37,551,000	38,329,000
Deferred income taxes	-1,837,000	0
Deferred Revenue, Noncurrent	8,187,000	10,753,000
Other long-term liabilities	829,000	989,000
Liabilities	342,422,000	355,360,000
Common Stock, Value, Issued	0	461,000
Additional paid-in capital	232,340,000	216,872,000
Retained earnings	584,591,000	482,540,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	9,358,000	6,545,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	826,289,000	706,418,000
Liabilities and Equity	1,168,711,000	1,061,778,000
Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	170,063,000	173,395,000	141,968,000	94,235,000
Short-term investments	65,000	22,941,000
Accounts Receivable, Net	80,532,000	55,704,000
Prepaid expenses and other current assets	9,137,000	3,402,000
Deferred income taxes	742,000	3,126,000
Due from Affiliate, Current	1,428,000	0
Assets, Current	261,967,000	258,568,000
Long-term investments	0	0
Property and equipment, net	30,206,000	19,968,000
Tradenames, net	95,320,000	70,989,000
Patent and patent licenses, net	24,041,000	13,423,000
Customer Relationships, Net	161,560,000	94,855,000
Goodwill	583,544,000	371,397,000
Other purchased intangibles, net	13,280,000	5,609,000
Investments in and Advances to Affiliates, Amount of Equity	8,716,000	0
Deferred income taxes		1,643,000
Other assets	2,123,000	1,835,000
Assets	1,180,757,000	838,287,000
Accounts payable and accrued expenses	64,062,000	40,151,000
Income taxes payable		1,569,000
Deferred revenue	40,366,000	12,564,000
Liability for Uncertain Tax Positions, Current		3,000
Deferred Tax Liabilities, Net, Current	342,000	986,000
Capital Lease Obligations, Current	258,000
Due to Affiliate, Current	110,000,000	4,433,000
Liabilities, Current	215,028,000	59,706,000
Long-term Debt	0	0
Capital Lease Obligations, Noncurrent	141,000
Liability for uncertain tax positions	0	0
Deferred income taxes	42,069,000	35,833,000
Deferred Revenue, Noncurrent	1,995,000	436,000
Other long-term liabilities	20,843,000	469,000
Liabilities	280,076,000	96,444,000
Common Stock, Value, Issued	0	34,000
Additional paid-in capital	421,676,000	326,983,000
Retained earnings	495,505,000	417,136,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	-16,500,000	-2,310,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	900,681,000	741,843,000
Liabilities and Equity	1,180,757,000	838,287,000
Consolidation, Eliminations [Member]
Cash and cash equivalents	0	0	0	0
Short-term investments	0	0
Accounts Receivable, Net	0	0
Prepaid expenses and other current assets	0	0
Deferred income taxes	0	0
Due from Affiliate, Current	-186,366,000	-4,433,000
Assets, Current	-186,366,000	-4,433,000
Long-term investments	0	0
Property and equipment, net	0	0
Tradenames, net	0	0
Patent and patent licenses, net	0	0
Customer Relationships, Net	0	0
Goodwill	0	0
Other purchased intangibles, net	0	0
Investments in and Advances to Affiliates, Amount of Equity	-1,735,686,000	-741,843,000
Deferred income taxes		0
Other assets	0	0
Assets	-1,922,052,000	-746,276,000
Accounts payable and accrued expenses	0	0
Income taxes payable		0
Deferred revenue	0	0
Liability for Uncertain Tax Positions, Current		0
Deferred Tax Liabilities, Net, Current	0	0
Capital Lease Obligations, Current	0
Due to Affiliate, Current	-186,366,000	-4,433,000
Liabilities, Current	-186,366,000	-4,433,000
Long-term Debt	0	0
Capital Lease Obligations, Noncurrent	0
Liability for uncertain tax positions	0	0
Deferred income taxes	0	0
Deferred Revenue, Noncurrent	0	0
Other long-term liabilities	0	0
Liabilities	-186,366,000	-4,433,000
Common Stock, Value, Issued	0	-34,000
Additional paid-in capital	-654,016,000	-326,983,000
Retained earnings	-1,081,670,000	-414,826,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	0	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	-1,735,686,000	-741,843,000
Liabilities and Equity	($1,922,052,000)	($746,276,000)

Condensed_Consolidating_Financ3

Condensed Consolidating Financials Condensed Consolidating Income Statement (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues									$599,030	$520,801	$371,396
Cost of revenues									105,989	86,893	67,013
Gross Profit	138,145	124,974	119,186	110,736	115,857	105,987	118,682	93,382	493,041	433,908	304,383
Selling and Marketing Expense									141,967	131,317	62,825
Research and Development Expense									30,680	25,485	18,624
General and Administrative Expense									134,188	101,683	60,772
Operating Expenses									306,835	258,485	142,221
Operating Income (Loss)									186,206	175,423	162,162
Income (Loss) from Subsidiaries, before Tax									0	0	0
Interest expense (income), net									31,204	21,254	7,650
Other expense (income), net									-165	11,472	-410
Income before income taxes									155,167	142,697	154,922
Income tax expense									29,840	35,175	33,259
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	32,754	28,759	35,049	28,765	20,754	27,806	36,040	22,922	125,327	107,522	121,663
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	83
Preferred Stock Redemption Premium									991	0	0
Net earnings attributable to j2 Global, Inc. common shareholders	31,763	28,759	35,049	28,765	20,754	27,806	36,040	22,922	124,336	107,522	121,580
j2 Global, Inc. [Member]
Revenues									0	0	0
Cost of revenues									0	0	0
Gross Profit									0	0	0
Selling and Marketing Expense									0	0	0
Research and Development Expense									0	0	0
General and Administrative Expense									6,401	0	0
Operating Expenses									6,401	0	0
Operating Income (Loss)									-6,401	0	0
Income (Loss) from Subsidiaries, before Tax									135,838	0	0
Interest expense (income), net									10,442	0	0
Other expense (income), net									-23	0	0
Income before income taxes									119,018	0	0
Income tax expense									-6,309	0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									125,327	0	0
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	0
Preferred Stock Redemption Premium									991
Net earnings attributable to j2 Global, Inc. common shareholders									124,336	0	0
j2 Cloud Services, Inc. [Member]
Revenues									227,860	255,413	222,203
Cost of revenues									51,391	84,655	85,826
Gross Profit									176,469	170,758	136,377
Selling and Marketing Expense									36,414	41,555	35,677
Research and Development Expense									14,055	12,977	11,878
General and Administrative Expense									30,300	37,634	35,558
Operating Expenses									80,769	92,166	83,113
Operating Income (Loss)									95,700	78,592	53,264
Income (Loss) from Subsidiaries, before Tax									77,051	61,551	91,539
Interest expense (income), net									20,478	9,292	3,911
Other expense (income), net									141	-369	-168
Income before income taxes									152,132	131,220	141,060
Income tax expense									16,294	23,698	19,480
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									135,838	107,522	121,580
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	0
Preferred Stock Redemption Premium									0
Net earnings attributable to j2 Global, Inc. common shareholders									135,838	107,522	121,580
Non-Guarantor Subsidiaries [Member]
Revenues									412,217	369,079	206,045
Cost of revenues									95,386	105,480	38,039
Gross Profit									316,831	263,599	168,006
Selling and Marketing Expense									105,812	90,211	27,148
Research and Development Expense									16,625	12,508	6,746
General and Administrative Expense									97,487	64,049	25,214
Operating Expenses									219,924	166,768	59,108
Operating Income (Loss)									96,907	96,831	108,898
Income (Loss) from Subsidiaries, before Tax									0	0	0
Interest expense (income), net									284	11,962	3,739
Other expense (income), net									-283	11,841	-242
Income before income taxes									96,906	73,028	105,401
Income tax expense									19,855	11,477	13,779
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									77,051	61,551	91,622
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	83
Preferred Stock Redemption Premium									0
Net earnings attributable to j2 Global, Inc. common shareholders									77,051	61,551	91,539
Consolidation, Eliminations [Member]
Revenues									-41,047	-103,691	-56,852
Cost of revenues									-40,788	-103,242	-56,852
Gross Profit									-259	-449	0
Selling and Marketing Expense									-259	-449	0
Research and Development Expense									0	0	0
General and Administrative Expense									0	0	0
Operating Expenses									-259	-449	0
Operating Income (Loss)									0	0	0
Income (Loss) from Subsidiaries, before Tax									-212,889	-61,551	-91,539
Interest expense (income), net									0	0	0
Other expense (income), net									0	0	0
Income before income taxes									-212,889	-61,551	-91,539
Income tax expense									0	0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									-212,889	-61,551	-91,539
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	0
Preferred Stock Redemption Premium									0
Net earnings attributable to j2 Global, Inc. common shareholders									($212,889)	($61,551)	($91,539)

Condensed_Consolidating_Financ4

Condensed Consolidating Financials Condensed Consolidating Comprehensive Income Statement (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$32,754	$28,759	$35,049	$28,765	$20,754	$27,806	$36,040	$22,922	$125,327	$107,522	$121,663
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax									-14,694	78	1,435
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax									3,332	4,245	1,954
Other Comprehensive Income (Loss), Net of Tax									-11,362	4,323	3,389
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									113,965	111,845	125,052
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	83
Comprehensive income attributable to j2 Global, Inc.									113,965	111,845	124,969
j2 Global, Inc. [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									125,327	0	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax									0	0	0
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax									15	0	0
Other Comprehensive Income (Loss), Net of Tax									15	0	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									125,342	0	0
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	0
Comprehensive income attributable to j2 Global, Inc.									125,342	0	0
j2 Cloud Services, Inc. [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									135,838	107,522	121,580
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax									-478	-43	521
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax									3,307	4,249	1,960
Other Comprehensive Income (Loss), Net of Tax									2,829	4,206	2,481
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									138,667	111,728	124,061
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	0
Comprehensive income attributable to j2 Global, Inc.									138,667	111,728	124,061
Non-Guarantor Subsidiaries [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									77,051	61,551	91,622
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax									-14,216	121	914
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax									10	-4	-6
Other Comprehensive Income (Loss), Net of Tax									-14,206	117	908
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									62,845	61,668	92,530
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	83
Comprehensive income attributable to j2 Global, Inc.									62,845	61,668	92,447
Consolidation, Eliminations [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									-212,889	-61,551	-91,539
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax									0	0	0
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax									0	0	0
Other Comprehensive Income (Loss), Net of Tax									0	0	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									-212,889	-61,551	-91,539
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	0
Comprehensive income attributable to j2 Global, Inc.									($212,889)	($61,551)	($91,539)

Condensed_Consolidating_Financ5

Condensed Consolidating Financials Condensed Consolidating Statement of Cash Flows (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$125,327	$107,522	$121,663
Depreciation and amortization	62,953	39,788	22,164
Accretion (Amortization) of Discounts and Premiums, Investments	1,334	1,796	1,603
Amortization of financing costs and discounts	5,045	613	249
Share-based Compensation	8,908	9,720	9,132
Excess Tax Benefit from Share-based Compensation, Operating Activities	-5,512	-2,695	-961
Provision for doubtful accounts	4,702	3,135	4,289
Income (Loss) from Equity Method Investments	0	0	0
Deferred income taxes	-10,033	250	1,150
Loss on disposal of fixed assets	0	8	54
(Gain) loss on available-for-sale investments	-90	66	-266
Loss on extinguishment of debt and related interest expense	0	14,437	0
Increase (Decrease) in Accounts Receivable	-11,078	-9,588	-5,417
Increase (Decrease) in Prepaid Expense and Other Assets	-3,212	149	-2,028
Increase (Decrease) in Other Operating Assets	-42	168	-243
Accounts payable and accrued expenses	-5,447	9,126	5,138
Income taxes payable	10,797	667	4,139
Deferred revenue	-711	12,368	1,612
Liability for uncertain tax positions	-6,313	6,186	7,601
Other	603	-392	32
Net Cash Provided by (Used in) Operating Activities	177,231	193,324	169,911
Maturity of certificates of deposit	14,520	42,615	8,000
Payments to Acquire Other Investments	-65	-22,071	-34,673
Sales of available-for-sale investments	110,363	140,126	138,709
Payments to Acquire Available-for-sale Securities	-138,452	-168,901	-151,989
Payments to Acquire Property, Plant, and Equipment	-11,829	-18,627	-5,061
Proceeds from sale of assets	608	1	156
Payments to Acquire Businesses, Net of Cash Acquired	-245,278	-126,341	-198,341
Payments to Acquire Intangible Assets	-5,336	-14,200	-6,295
Payments to Acquire Interest in Subsidiaries and Affiliates	0	0	0
Payments for (Proceeds from) Other Investing Activities		0	0
Payments of Distributions to Affiliates	0	0	0
Net Cash Provided by (Used in) Investing Activities	-275,469	-167,398	-249,494
Proceeds from Issuance of Long-term Debt	-402,500	0	-245,000
Debt issuance costs	-11,991	-47	-1,384
Payments for Repurchase of Common Stock	-5,663	-4,587	-60,282
Issuance of common stock under employee stock purchase plan	265	213	157
Exercise of stock options	6,621	13,604	5,646
Proceeds from noncontrolling interests	0	0	8,557
Payments of Dividends	-52,269	-45,134	-40,263
Excess tax benefits from share-based compensation	5,512	2,695	961
PaymentsOfDeferredConsiderationRelatedToAcquisition	-16,512	0	0
Proceeds from (Payments for) Other Financing Activities	-933	-2,437	0
Net Cash Provided by (Used in) Financing Activities	327,530	-35,693	158,392
Effect of exchange rate changes on cash and cash equivalents	-3,430	-1,112	512
Cash and Cash Equivalents, Period Increase (Decrease)	225,862	-10,879	79,321
Cash and cash equivalents	433,663	207,801	218,680
j2 Global, Inc. [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	125,327	0	0
Depreciation and amortization	0	0	0
Accretion (Amortization) of Discounts and Premiums, Investments	392	0	0
Amortization of financing costs and discounts	4,297	0	0
Share-based Compensation	2,353	0	0
Excess Tax Benefit from Share-based Compensation, Operating Activities	-86	0	0
Provision for doubtful accounts	0	0	0
Income (Loss) from Equity Method Investments	-135,838	0	0
Deferred income taxes	-1,392	0	0
Loss on disposal of fixed assets	0	0	0
(Gain) loss on available-for-sale investments	26	0	0
Loss on extinguishment of debt and related interest expense		0	0
Increase (Decrease) in Accounts Receivable	0	0	0
Increase (Decrease) in Prepaid Expense and Other Assets	-776	0	0
Increase (Decrease) in Other Operating Assets	0	0	0
Accounts payable and accrued expenses	2,835	0	0
Income taxes payable	2,055	0	0
Deferred revenue	0	0	0
Liability for uncertain tax positions	0	0	0
Other	742	0	0
Net Cash Provided by (Used in) Operating Activities	-65	0	0
Maturity of certificates of deposit	0	0	0
Payments to Acquire Other Investments	0	0	0
Sales of available-for-sale investments	40,211	0	0
Payments to Acquire Available-for-sale Securities	-81,061	0	0
Payments to Acquire Property, Plant, and Equipment	0	0	0
Proceeds from sale of assets	0	0	0
Payments to Acquire Businesses, Net of Cash Acquired	0	0	0
Payments to Acquire Intangible Assets	0	0	0
Payments to Acquire Interest in Subsidiaries and Affiliates	0	0	0
Payments for (Proceeds from) Other Investing Activities		0	0
Payments of Distributions to Affiliates	-96,509	0	0
Net Cash Provided by (Used in) Investing Activities	-40,850	0	0
Proceeds from Issuance of Long-term Debt	-402,500	0	0
Debt issuance costs	-11,991	0	0
Payments for Repurchase of Common Stock	-930	0	0
Issuance of common stock under employee stock purchase plan	142	0	0
Exercise of stock options	1,374	0	0
Proceeds from noncontrolling interests	0	0	0
Payments of Dividends	-26,967	0	0
Excess tax benefits from share-based compensation	86	0	0
PaymentsOfDeferredConsiderationRelatedToAcquisition	0	0	0
Proceeds from (Payments for) Other Financing Activities	0	0	0
Net Cash Provided by (Used in) Financing Activities	267,705	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	226,790	0	0
Cash and cash equivalents	226,790	0	0
j2 Cloud Services, Inc. [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	135,838	107,522	121,580
Depreciation and amortization	6,047	9,201	8,590
Accretion (Amortization) of Discounts and Premiums, Investments	722	1,273	1,461
Amortization of financing costs and discounts	748	613	249
Share-based Compensation	5,325	9,720	9,132
Excess Tax Benefit from Share-based Compensation, Operating Activities	-4,803	-2,695	-961
Provision for doubtful accounts	2,114	1,219	293
Income (Loss) from Equity Method Investments	-77,051	-61,551	-91,539
Deferred income taxes	-5,767	-495	4,839
Loss on disposal of fixed assets	0	0	54
(Gain) loss on available-for-sale investments	-58	-51	-266
Loss on extinguishment of debt and related interest expense		0	0
Increase (Decrease) in Accounts Receivable	-2,490	-1,656	-822
Increase (Decrease) in Prepaid Expense and Other Assets	-8,757	784	-1,265
Increase (Decrease) in Other Operating Assets	0	-57	123
Accounts payable and accrued expenses	-1,173	-124	10,599
Income taxes payable	17,384	-923	2,193
Deferred revenue	-2,067	13,415	878
Liability for uncertain tax positions	-6,311	6,184	7,601
Other	-157	-88	99
Net Cash Provided by (Used in) Operating Activities	59,544	82,291	72,838
Maturity of certificates of deposit	8,210	30,270	8,000
Payments to Acquire Other Investments	0	-16,375	-22,106
Sales of available-for-sale investments	53,563	124,745	138,709
Payments to Acquire Available-for-sale Securities	-57,391	-149,748	-139,087
Payments to Acquire Property, Plant, and Equipment	-2,866	-6,223	-2,677
Proceeds from sale of assets	608	1	136
Payments to Acquire Businesses, Net of Cash Acquired	-2,083	-4,043	-1,811
Payments to Acquire Intangible Assets	-2,949	-3,034	-4,433
Payments to Acquire Interest in Subsidiaries and Affiliates	-23,821	-14,920	-171,562
Payments for (Proceeds from) Other Investing Activities		3,281	0
Payments of Distributions to Affiliates	-10,495	-55,295	3,746
Net Cash Provided by (Used in) Investing Activities	-26,729	-36,046	-194,831
Proceeds from Issuance of Long-term Debt	0	0	245,000
Debt issuance costs	0	-47	-1,384
Payments for Repurchase of Common Stock	-4,733	-4,587	-60,282
Issuance of common stock under employee stock purchase plan	123	213	157
Exercise of stock options	5,193	13,604	5,646
Proceeds from noncontrolling interests	0	0	0
Payments of Dividends	-25,302	-45,134	-40,263
Excess tax benefits from share-based compensation	4,803	2,695	961
PaymentsOfDeferredConsiderationRelatedToAcquisition	0	0	0
Proceeds from (Payments for) Other Financing Activities	0	0	0
Net Cash Provided by (Used in) Financing Activities	-30,411	-88,551
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	2,404	-42,306	31,588
Cash and cash equivalents	36,810	34,406	76,712
Non-Guarantor Subsidiaries [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	77,051	61,551	91,622
Depreciation and amortization	56,906	30,587	13,574
Accretion (Amortization) of Discounts and Premiums, Investments	220	523	142
Amortization of financing costs and discounts	0	0	0
Share-based Compensation	1,230	0	0
Excess Tax Benefit from Share-based Compensation, Operating Activities	-623	0	0
Provision for doubtful accounts	2,588	1,916	3,996
Income (Loss) from Equity Method Investments	0	0	0
Deferred income taxes	-2,874	745	-3,689
Loss on disposal of fixed assets	0	8	0
(Gain) loss on available-for-sale investments	-58	117	0
Loss on extinguishment of debt and related interest expense		14,437	0
Increase (Decrease) in Accounts Receivable	-8,588	-7,932	-4,595
Increase (Decrease) in Prepaid Expense and Other Assets	6,321	-635	-763
Increase (Decrease) in Other Operating Assets	-42	225	-366
Accounts payable and accrued expenses	-7,109	9,250	-5,461
Income taxes payable	-8,642	1,590	1,946
Deferred revenue	1,356	-1,047	734
Liability for uncertain tax positions	-2	2	0
Other	18	-304	-67
Net Cash Provided by (Used in) Operating Activities	117,752	111,033	97,073
Maturity of certificates of deposit	6,310	12,345	0
Payments to Acquire Other Investments	-65	-5,696	-12,567
Sales of available-for-sale investments	16,589	15,381	0
Payments to Acquire Available-for-sale Securities	0	-19,153	-12,902
Payments to Acquire Property, Plant, and Equipment	-8,963	-12,404	-2,384
Proceeds from sale of assets	0	0	20
Payments to Acquire Businesses, Net of Cash Acquired	-243,195	-122,298	-196,530
Payments to Acquire Intangible Assets	-2,387	-11,166	-1,862
Payments to Acquire Interest in Subsidiaries and Affiliates	0	0	0
Payments for (Proceeds from) Other Investing Activities		-3,281	0
Payments of Distributions to Affiliates	130,825	70,215	167,816
Net Cash Provided by (Used in) Investing Activities	-231,711	-146,272	-226,225
Proceeds from Issuance of Long-term Debt	0	0	0
Debt issuance costs	0	0	0
Payments for Repurchase of Common Stock	0	0	0
Issuance of common stock under employee stock purchase plan	0	0	0
Exercise of stock options	54	0	0
Proceeds from noncontrolling interests	0	0	8,557
Payments of Dividends	0	0	0
Excess tax benefits from share-based compensation	623	0	0
PaymentsOfDeferredConsiderationRelatedToAcquisition	-16,512	0	0
Proceeds from (Payments for) Other Financing Activities	-933	-2,437	0
Net Cash Provided by (Used in) Financing Activities	114,057	67,778
Effect of exchange rate changes on cash and cash equivalents	-3,430	-1,112	512
Cash and Cash Equivalents, Period Increase (Decrease)	-3,332	31,427	47,733
Cash and cash equivalents	170,063	173,395	141,968
Consolidation, Eliminations [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	-212,889	-61,551	-91,539
Depreciation and amortization	0	0	0
Accretion (Amortization) of Discounts and Premiums, Investments	0	0	0
Amortization of financing costs and discounts	0	0	0
Share-based Compensation	0	0	0
Excess Tax Benefit from Share-based Compensation, Operating Activities	0	0	0
Provision for doubtful accounts	0	0	0
Income (Loss) from Equity Method Investments	212,889	61,551	91,539
Deferred income taxes	0	0	0
Loss on disposal of fixed assets	0	0	0
Loss on extinguishment of debt and related interest expense		0	0
Increase (Decrease) in Accounts Receivable	0	0	0
Increase (Decrease) in Prepaid Expense and Other Assets	0	0	0
Increase (Decrease) in Other Operating Assets	0	0
Accounts payable and accrued expenses	0	0	0
Income taxes payable	0	0	0
Deferred revenue	0	0	0
Liability for uncertain tax positions	0	0	0
Other	0	0	0
Net Cash Provided by (Used in) Operating Activities	0	0	0
Maturity of certificates of deposit	0	0	0
Payments to Acquire Other Investments	0	0	0
Sales of available-for-sale investments	0	0	0
Payments to Acquire Available-for-sale Securities	0	0	0
Payments to Acquire Property, Plant, and Equipment	0	0	0
Proceeds from sale of assets	0	0	0
Payments to Acquire Businesses, Net of Cash Acquired	0	0	0
Payments to Acquire Intangible Assets	0	0	0
Payments to Acquire Interest in Subsidiaries and Affiliates	23,821	14,920	171,562
Payments for (Proceeds from) Other Investing Activities		0	0
Payments of Distributions to Affiliates	-23,821	-14,920	-171,562
Net Cash Provided by (Used in) Investing Activities	23,821	14,920	171,562
Proceeds from Issuance of Long-term Debt	0	0	0
Debt issuance costs	0	0	0
Payments for Repurchase of Common Stock	0	0	0
Issuance of common stock under employee stock purchase plan	0	0	0
Exercise of stock options	0	0
Proceeds from noncontrolling interests	0		0
Payments of Dividends	0	0	0
Excess tax benefits from share-based compensation	0	0	0
PaymentsOfDeferredConsiderationRelatedToAcquisition	0	0	0
Proceeds from (Payments for) Other Financing Activities	0	0	0
Net Cash Provided by (Used in) Financing Activities	-23,821	-14,920
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	0	0	0
Cash and cash equivalents	$0	$0	$0

Supplemental_Cash_Flows_Inform1

Supplemental Cash Flows Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Cash Flows Information [Abstract]
Cash paid for income taxes	$49,500,000	$28,300,000	$20,400,000
Capital Expenditures Incurred but Not yet Paid	600,000	900,000	600,000
Tax Benefit from Stock Options Exercised	10,200,000	7,100,000	3,300,000
Interest Paid	26,600,000	21,100,000	400,000
Business Combination, Contingent Consideration, Liability	45,300,000	7,000,000	2,500,000
Loss on extinguishment of debt and related interest expense	$0	$14,437,000	$0

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income Roll Forward (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) Roll Forward [Line Items]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$9,388	$6,056	$1,811
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	-16,515	-1,821	-1,899
Accumulated Other Comprehensive Income (Loss), Net of Tax	-7,127	4,235	-88
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	3,332	4,245	1,954
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	-14,694	-10
Other Comprehensive Income Loss Arising During Period Total Net of Tax	-11,348	4,226
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	-14	9
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0	88
Other Comprehensive Income Loss Reclassification Adjustments Total Net of Tax	-14	97
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	3,346	4,236
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	-14,694	78	1,435
Other Comprehensive Income (Loss), Net of Tax	($11,362)	$4,323	$3,389

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$3,346	$4,236
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	3,332	4,245	1,954
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]
Other expense (income), net	-165	11,472	-410
Income tax expense	29,840	35,175	33,259
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0	88
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	-14	9
Other Comprehensive Income Loss Reclassification Adjustments Total Net of Tax	-14	97
Accumulated Translation Adjustment [Member]
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]
Other expense (income), net	0	116
Income tax expense	0	-28
Accumulated Net Unrealized Investment Gain (Loss) [Member]
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]
Other expense (income), net	-23	14
Income tax expense	$9	($5)

Quarterly_Results_Details

Quarterly Results (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Results [Abstract]
Revenue, Net	$167,144	$153,018	$144,744	$134,124	$138,035	$127,788	$141,361	$113,617
Gross Profit	138,145	124,974	119,186	110,736	115,857	105,987	118,682	93,382	493,041	433,908	304,383
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	32,754	28,759	35,049	28,765	20,754	27,806	36,040	22,922	125,327	107,522	121,663
Net earnings attributable to j2 Global, Inc. common shareholders	$31,763	$28,759	$35,049	$28,765	$20,754	$27,806	$36,040	$22,922	$124,336	$107,522	$121,580
Basic	$0.66	$0.60	$0.73	$0.61	$0.45	$0.60	$0.78	$0.50	$2.60	$2.31	$2.63
Diluted	$0.66	$0.60	$0.73	$0.60	$0.44	$0.59	$0.77	$0.49	$2.58	$2.28	$2.61
Basic	47,146,503	46,845,477	46,745,596	46,365,158	45,867,769	45,729,171	45,428,230	45,160,140	46,778,015	45,548,767	45,459,712
Diluted	47,468,841	47,163,912	47,067,767	46,765,732	46,382,363	46,291,631	46,018,245	45,668,167	47,106,538	46,140,019	45,781,658

Unrestricted_Subsidiaries_Unre

Unrestricted Subsidiaries Unrestricted Subsidiaries (Financial Position) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Cash and cash equivalents	$433,663	$207,801	$218,680	$139,359
Accounts Receivable, Net	91,699	67,245
Prepaid expenses and other current assets	22,602	20,064
Deferred income taxes	2,013	3,126
Assets, Current	646,183	389,025
Property and equipment, net	38,217	31,200
Tradenames, net	105,551	83,108
Patent and patent licenses, net	24,927	28,530
Customer Relationships, Net	163,766	100,980
Goodwill	635,675	457,422
Other purchased intangibles, net	17,556	10,915
Deferred income taxes	0	1,845
Other assets	12,819	3,413
Assets	1,705,202	1,153,789
Accounts payable and accrued expenses	95,310	69,570
Income taxes payable	0	1,569
Deferred revenue	63,457	36,326
Deferred Tax Liabilities, Net, Current	342	1,892
Liabilities, Current	159,367	114,892
Long-term Debt	593,350	245,670
Deferred income taxes	61,960	35,833
Other long-term liabilities	22,416	1,458
Liabilities	884,967	447,371
Commitments and contingencies	0	0
Common Stock, Value, Issued	474	461
Additional paid-in capital	273,304	216,872
Retained earnings	553,584	484,850
Accumulated Other Comprehensive Income (Loss), Net of Tax	-7,127	4,235	-88
Stockholders' equity attributable to j2 Global, Inc.	820,235	706,418		554,375
Stockholders' Equity Attributable to Noncontrolling Interest	0	0		0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	820,235	706,418		554,375
Liabilities and Equity	1,705,202	1,153,789
Unrestricted Subsidiaries [Member]
Cash and cash equivalents	27,944
Accounts Receivable, Net	57,005
Prepaid expenses and other current assets	2,986
Deferred income taxes	5,292
Assets, Current	93,227
Property and equipment, net	12,834
Tradenames, net	70,310
Patent and patent licenses, net	24,007
Customer Relationships, Net	55,925
Goodwill	245,613
Other purchased intangibles, net	8,901
Deferred income taxes	0
Other assets	1,706
Assets	512,523
Accounts payable and accrued expenses	40,296
Income taxes payable	316
Deferred revenue	5,277
Liabilities, Current	45,889
Long-term Debt	110,000
Deferred income taxes	17,397
Other long-term liabilities	16,243
Mandatorily redeemable financial instrument	0
Liabilities	189,529
Additional paid-in capital	317,932
Retained earnings	6,051
Accumulated Other Comprehensive Income (Loss), Net of Tax	-989
Stockholders' equity attributable to j2 Global, Inc.	322,994
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	322,994
Liabilities and Equity	$512,523

Unrestricted_Subsidiaries_Unre1

Unrestricted Subsidiaries Unrestricted Subsidiaries (Results of Operations) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues									$599,030	$520,801	$371,396
Cost of revenues									105,989	86,893	67,013
Gross Profit	138,145	124,974	119,186	110,736	115,857	105,987	118,682	93,382	493,041	433,908	304,383
Selling and Marketing Expense									141,967	131,317	62,825
Research and Development Expense									30,680	25,485	18,624
General and Administrative Expense									134,188	101,683	60,772
Operating Expenses									306,835	258,485	142,221
Operating Income (Loss)									186,206	175,423	162,162
Interest expense (income), net									31,204	21,254	7,650
Other expense (income), net									-165	11,472	-410
Income before income taxes									155,167	142,697	154,922
Income tax expense									29,840	35,175	33,259
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	32,754	28,759	35,049	28,765	20,754	27,806	36,040	22,922	125,327	107,522	121,663
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	83
Net earnings attributable to j2 Global, Inc. common shareholders	31,763	28,759	35,049	28,765	20,754	27,806	36,040	22,922	124,336	107,522	121,580
Ziff Davis, Inc [Member]
Revenues									169,065
Cost of revenues									19,028
Gross Profit									150,037
Selling and Marketing Expense									68,057
Research and Development Expense									5,485
General and Administrative Expense									52,768
Operating Expenses									126,310
Operating Income (Loss)									23,727
Interest expense (income), net									821
Other expense (income), net									347
Income before income taxes									22,559
Income tax expense									4,883
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									17,676
Net Income (Loss) Attributable to Noncontrolling Interest									0
Net earnings attributable to j2 Global, Inc. common shareholders									$17,676

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	0 Months Ended
	Feb. 10, 2015	Oct. 30, 2014	Aug. 05, 2014	7-May-14	Feb. 12, 2014
Subsequent Events [Abstract]
Dividends declared date	10-Feb-15	30-Oct-14	5-Aug-14	7-May-14	11-Feb-14
Dividend amount to be paid, per common share	$0.29	$0.28	$0.28	$0.27	$0.26
Date dividend is payable	9-Mar-15	4-Dec-14	2-Sep-14	3-Jun-14	10-Mar-14
Date shareholders must be on record for dividend	23-Feb-15	17-Nov-14	18-Aug-14	19-May-14	24-Feb-14