Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:
Revenues	$ 520,801	$ 371,396	$ 330,159
Cost of revenues (including share-based compensation of $756, $844 and $982 in 2013, 2012 and 2011, respectively)	86,893	67,013	60,613
Gross profit	433,908	304,383	269,546
Operating expenses:
Sales and marketing (including share-based compensation of $1,855, $1,543 and $1,431 in 2013, 2012 and 2011, respectively)	131,317	62,825	59,066
Research, development and engineering (including share-based compensation of $434, $459 and $477 in 2013, 2012 and 2011, respectively)	25,485	18,624	16,373
General and administrative (including share-based compensation of $6,675, $6,286, $6,103 in 2013, 2012 and 2011, respectively)	101,683	60,772	58,157
Total operating expenses	258,485	142,221	133,596
Operating earnings	175,423	162,162	135,950
Interest expense (income), net	21,254	7,650	(629)
Other expense (income), net	11,472	(410)	(537)
Income before income taxes	142,697	154,922	137,116
Income tax expense	35,175	33,259	22,350
Net earnings attributable to j2 Global, Inc. common shareholders	107,522	121,580	114,766
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	107,522	121,663	114,766
Net Income (Loss) Attributable to Noncontrolling Interest	$ 0	$ 83	$ 0
Net earnings per common share:
Basic	$ 2.31	$ 2.63	$ 2.46
Diluted	$ 2.28	$ 2.61	$ 2.43
Weighted average shares outstanding:
Basic	45,548,767	45,459,712	45,799,615
Diluted	46,140,019	45,781,658	46,384,848
Cash dividends paid per common share	$ 0.98	$ 0.87	$ 0.41