Consolidated Statement Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 121,663	$ 114,766	$ 83,047
Foreign currency translation adjustment, net of tax (benefit) of $196, ($198) and ($164) for the year ended 2012, 2011 and 2010, respectively	1,435	(840)	(659)
Unrealized gain on available-for-sale investments, net of tax (benefit) of $646, ($142) and ($100) for the year ended 2012, 2011 and 2010, respectively	1,954	(602)	(401)
Other Comprehensive Income, net of tax	3,389	(1,442)	(1,060)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	125,052	113,324	81,987
Net Income (Loss) Attributable to Noncontrolling Interest	83	0	0
Comprehensive income attributable to j2 Global, Inc.	$ 124,969	$ 113,324	$ 81,987