Condensed Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Total revenues	$ 144,744	$ 141,361	$ 278,868	$ 254,978
Cost of revenues (including share-based compensation of $27 and $181 for the three and six months of 2014, respectively, and $205 and $419 for the three and six months of 2013, respectively)	25,558	22,679	48,947	42,914
Gross profit	119,186	118,682	229,921	212,064
Operating expenses:
Sales and marketing (including share-based compensation of $426 and $917 for the three and six months of 2014, respectively, and $432 and $850 for the three and six months of 2013, respectively)	35,329	35,213	68,288	64,851
Research, development and engineering (including share-based compensation of $222 and $362 for the three and six months of 2014, respectively, and $102 and $208 for three and six months of 2013, respectively)	7,600	6,388	14,814	13,134
General and administrative (including share-based compensation of $1,288 and $2,887 for the three and six months of 2014, respectively, and $1,596 and $3,206 for the three and six months of 2013, respectively)	31,419	24,474	60,397	48,485
Total operating expenses	74,348	66,075	143,499	126,470
Operating income	44,838	52,607	86,422	85,594
Interest expense (income), net	5,682	4,859	10,630	9,736
Other expense (income), net	(185)	(42)	(505)	(203)
Income before income taxes	39,341	47,790	76,297	76,061
Income Tax Expense (Benefit)	4,292	11,823	12,483	17,323
Net income attributable to j2 Global, Inc. common shareholders	35,049	36,040	63,814	58,962
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	35,049	35,967	63,814	58,738
Net Income (Loss) Attributable to Noncontrolling Interest	$ 0	$ (73)	$ 0	$ (224)
Net income per common share:
Basic	$ 0.73	$ 0.78	$ 1.34	$ 1.28
Diluted	$ 0.73	$ 0.77	$ 1.33	$ 1.26
Weighted average shares outstanding:
Basic	46,745,596	45,428,230	46,556,428	45,294,925
Diluted	47,067,767	46,018,245	46,911,574	45,881,465
Cash dividends paid per common share	$ 0.2700	$ 0.2400	$ 0.53	$ 0.47