Commitments And Contingencies	6 Months Ended
Jun. 30, 2017
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 legal disputes or regulatory inquiries that arise in the ordinary course of business. Any claims or regulatory actions against j2 Global and its affiliates, whether meritorious or not, could be time consuming and costly, and could divert significant operational resources. The outcomes of such matters are subject to inherent uncertainties, carrying the potential for unfavorable rulings that could include monetary damages and injunctive relief. On February 17, 2011, Emmanuel Pantelakis (“Pantelakis”) filed suit against a j2 Global affiliate in the Ontario Superior Court of Justice (No. 11-50673), alleging that the j2 Global affiliate breached a contract relating to Pantelakis’s use of the Campaigner^® service. The j2 Global affiliate filed a responsive pleading on March 23, 2011 and responses to undertakings on July 16, 2012. On November 6, 2012, Pantelakis filed a second amended statement of claim, reframing his lawsuit as a negligence action. The j2 Global affiliate filed an amended statement of defense on April 8, 2013. Discovery is ongoing. On January 17, 2013, the Commissioner of the Massachusetts Department of Revenue (“Commissioner”) issued a notice of assessment to a j2 Global affiliate for sales and use tax for the period of July 1, 2003 through December 31, 2011. On July 22, 2014, the Commissioner denied the j2 Global affiliate’s application for abatement. On September 18, 2014, the j2 Global affiliate petitioned the Massachusetts Appellate Tax Board for abatement of the tax asserted in the notice of assessment (No. C325426). A trial was held on December 16, 2015. On May 18, 2017, the Appellate Board decided in favor of the Commonwealth of Massachusetts. The j2 Global affiliate has requested the findings of fact and conclusions of law from the Appellate Board. On October 16, 2013, a j2 Global affiliate entered an appearance as a plaintiff in a multi-district litigation pending in the Northern District of Illinois (No. 1:12-cv-06286). In this litigation, Unified Messaging Solutions, LLC (“UMS”), a company with rights to assert certain patents owned by the j2 Global affiliate, has asserted five j2 Global patents against a number of defendants. While claims against some defendants have been settled, other defendants have filed counterclaims for, among other things, non-infringement, unenforceability, and invalidity of the patents-in-suit. On December 20, 2013, the Northern District of Illinois issued a claim construction opinion and, on June 13, 2014, entered a final judgment of non-infringement for the remaining defendants based on that claim construction. UMS and the j2 Global affiliate filed a notice of appeal to the Federal Circuit on June 27, 2014 (No. 14-1611). The appeal is pending. On January 21, 2016, Davis Neurology, P.A. filed a putative class action against two j2 Global affiliates in the Circuit Court for the County of Pope, State of Arkansas (58-cv-2016-40), alleging violations of the TCPA. The case was ultimately removed to the U.S. District Court for the Eastern District of Arkansas (the “Eastern District of Arkansas”) (No. 4:16-cv-00682). On June 6, 2016, the j2 Global affiliates filed a motion for judgment on the pleadings. On March 20, 2017, the Eastern District of Arkansas dismissed all claims against the j2 Global affiliates. On April 17, 2017, Davis Neurology filed a noticed of appeal to the Federal Circuit (No. 17-1820). j2 Global does not believe, based on current knowledge, that the foregoing legal proceedings or claims, after giving effect to existing reserves, are likely to have a material adverse effect on the Company’s consolidated financial position, results of operations, or cash flows. However, depending on the amount and timing, an unfavorable resolution of some or all of these matters could have a material effect on j2 Global’s consolidated financial position, results of operations, or cash flows in a particular period. The Company has not accrued for any material loss contingencies relating to these legal proceedings because materially unfavorable outcomes are not considered probable by management. Credit Agreement On June 27, 2017, the Company paid off the entire line of credit of $225.0 million, in addition to interest and miscellaneous fees of $0.5 million. 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 the Company’s services) are generally not subject to various telecommunication taxes. Moreover, the Company generally does not believe that its business and its users (by using the Company’s services) are subject to other indirect taxes, such as sales, 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 the Company’s business and operations with respect to telecommunications and other indirect taxes. On February 24, 2016, President Obama signed into law H.R. 644, the “Trade Facilitation and Trade Enforcement Act of 2015”, which included a provision to permanently ban state and local authorities from imposing access or discriminatory taxes on the Internet. The new law allows “grandfathered” states and local authorities to continue their existing taxes on Internet access through June 2020. The Company is currently under audit for indirect taxes in several states and municipalities including New York State, Massachusetts, Ohio, and the City of Los Angeles. On March 3, 2017, the New York State Department of Taxation and Finance issued a notice of assessment to a j2 Global affiliate for sales and use tax for the period of March 1, 2009 through February 28, 2014. We have reserved for potential adjustments to our accrual of indirect taxes that may result from examinations by or any negotiated agreements with these tax authorities and we believe that the final outcome of these examinations or agreements will not have a material effect on our results of operations. If events occur which indicate payment of these amounts is unnecessary, the reversal of the liabilities would result in the recognition of benefits in the period we determine the liabilities are no longer necessary. If our estimated indirect tax liabilities are less than the ultimate assessment, it would result in a further charge to expense.

Commitments and Contingencies

Litigation

From time-to-time, j2 Global and its affiliates are involved in litigation and other legal disputes or regulatory inquiries that arise in the ordinary course of business. Any claims or regulatory actions against j2 Global and its affiliates, whether meritorious or not, could be time consuming and costly, and could divert significant operational resources. The outcomes of such matters are subject to inherent uncertainties, carrying the potential for unfavorable rulings that could include monetary damages and injunctive relief.

On February 17, 2011, Emmanuel Pantelakis (“Pantelakis”) filed suit against a j2 Global affiliate in the Ontario Superior Court of Justice (No. 11-50673), alleging that the j2 Global affiliate breached a contract relating to Pantelakis’s use of the Campaigner^® service. The j2 Global affiliate filed a responsive pleading on March 23, 2011 and responses to undertakings on July 16, 2012. On November 6, 2012, Pantelakis filed a second amended statement of claim, reframing his lawsuit as a negligence action. The j2 Global affiliate filed an amended statement of defense on April 8, 2013. Discovery is ongoing.

On January 17, 2013, the Commissioner of the Massachusetts Department of Revenue (“Commissioner”) issued a notice of assessment to a j2 Global affiliate for sales and use tax for the period of July 1, 2003 through December 31, 2011. On July 22, 2014, the Commissioner denied the j2 Global affiliate’s application for abatement. On September 18, 2014, the j2 Global affiliate petitioned the Massachusetts Appellate Tax Board for abatement of the tax asserted in the notice of assessment (No. C325426). A trial was held on December 16, 2015. On May 18, 2017, the Appellate Board decided in favor of the Commonwealth of Massachusetts. The j2 Global affiliate has requested the findings of fact and conclusions of law from the Appellate Board.

On October 16, 2013, a j2 Global affiliate entered an appearance as a plaintiff in a multi-district litigation pending in the Northern District of Illinois (No. 1:12-cv-06286). In this litigation, Unified Messaging Solutions, LLC (“UMS”), a company with rights to assert certain patents owned by the j2 Global affiliate, has asserted five j2 Global patents against a number of defendants. While claims against some defendants have been settled, other defendants have filed counterclaims for, among other things, non-infringement, unenforceability, and invalidity of the patents-in-suit. On December 20, 2013, the Northern District of Illinois issued a claim construction opinion and, on June 13, 2014, entered a final judgment of non-infringement for the remaining defendants based on that claim construction. UMS and the j2 Global affiliate filed a notice of appeal to the Federal Circuit on June 27, 2014 (No. 14-1611). The appeal is pending.

On January 21, 2016, Davis Neurology, P.A. filed a putative class action against two j2 Global affiliates in the Circuit Court for the County of Pope, State of Arkansas (58-cv-2016-40), alleging violations of the TCPA. The case was ultimately removed to the U.S. District Court for the Eastern District of Arkansas (the “Eastern District of Arkansas”) (No. 4:16-cv-00682). On June 6, 2016, the j2 Global affiliates filed a motion for judgment on the pleadings. On March 20, 2017, the Eastern District of Arkansas dismissed all claims against the j2 Global affiliates. On April 17, 2017, Davis Neurology filed a noticed of appeal to the Federal Circuit (No. 17-1820).

j2 Global does not believe, based on current knowledge, that the foregoing legal proceedings or claims, after giving effect to existing reserves, are likely to have a material adverse effect on the Company’s consolidated financial position, results of operations, or cash flows. However, depending on the amount and timing, an unfavorable resolution of some or all of these matters could have a material effect on j2 Global’s consolidated financial position, results of operations, or cash flows in a particular period.

The Company has not accrued for any material loss contingencies relating to these legal proceedings because materially unfavorable outcomes are not considered probable by management.

Credit Agreement

On June 27, 2017, the Company paid off the entire line of credit of $225.0 million, in addition to interest and miscellaneous fees of $0.5 million.

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 the Company’s services) are generally not subject to various telecommunication taxes. Moreover, the Company generally does not believe that its business and its users (by using the Company’s services) are subject to other indirect taxes, such as sales, 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 the Company’s business and operations with respect to telecommunications and other indirect taxes.

On February 24, 2016, President Obama signed into law H.R. 644, the “Trade Facilitation and Trade Enforcement Act of 2015”, which included a provision to permanently ban state and local authorities from imposing access or discriminatory taxes on the Internet. The new law allows “grandfathered” states and local authorities to continue their existing taxes on Internet access through June 2020.

The Company is currently under audit for indirect taxes in several states and municipalities including New York State, Massachusetts, Ohio, and the City of Los Angeles. On March 3, 2017, the New York State Department of Taxation and Finance issued a notice of assessment to a j2 Global affiliate for sales and use tax for the period of March 1, 2009 through February 28, 2014. We have reserved for potential adjustments to our accrual of indirect taxes that may result from examinations by or any negotiated agreements with these tax authorities and we believe that the final outcome of these examinations or agreements will not have a material effect on our results of operations. If events occur which indicate payment of these amounts is unnecessary, the reversal of the liabilities would result in the recognition of benefits in the period we determine the liabilities are no longer necessary. If our estimated indirect tax liabilities are less than the ultimate assessment, it would result in a further charge to expense.