Long Term Debt (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Jul. 26, 2012
Long-term Debt, Unclassified [Abstract]
Debt Instrument, Issuance Date	Jul. 26, 2012
Debt Instrument, Face Amount	$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage	8.00%
Debt Instrument, Maturity Date	Aug. 01, 2020
Proceeds from Debt, Net of Issuance Costs	245,000,000
Debt Instrument, Unamortized Discount	4,700,000		5,000,000
Debt Issuance Cost	1,300,000
Debt Instrument, Frequency of Periodic Payment	semi-annually
Debt Instrument, Date of First Required Payment	Feb. 01, 2013
Debt Instrument, Call Date, Earliest	Aug. 01, 2016
Debt Instrument, Covenant Description	The indenture to the Notes contain certain restrictive and other covenants applicable to j2 Global 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.
Debt Instrument [Line Items]
Long-term Debt	245,310,000	245,194,000
Long-term Debt, Current Maturities	0
Total long-term debt, less current portion	245,310,000
Long-term Debt, Fair Value	284,591,000	275,458,000
Interest Paid	$ 10,300,000