Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 207,801,000	$ 218,680,000
Short-term investments	90,789,000	105,054,000
Accounts receivable, net of allowances of $4,105 and $3,213, respectively	67,245,000	37,285,000
Prepaid expenses and other current assets	20,064,000	15,388,000
Deferred income taxes	3,126,000	1,092,000
Total current assets	389,025,000	377,499,000
Long-term investments	47,351,000	19,841,000
Property and equipment, net	31,200,000	19,599,000
Tradenames, net	83,108,000	71,409,000
Patent and patent licenses, net	28,530,000	19,329,000
Customer relationships, net	100,980,000	64,723,000
Goodwill	457,422,000	407,825,000
Other purchased intangibles, net	10,915,000	9,855,000
Deferred income taxes	1,845,000	1,852,000
Other assets	3,413,000	3,238,000
Total assets	1,153,789,000	995,170,000
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	69,570,000	39,874,000
Income taxes payable	1,569,000	3,037,000
Deferred revenue	36,326,000	30,493,000
Liability for uncertain tax positions	5,535,000	5,523,000
Deferred income taxes	1,892,000	0
Total current liabilities	114,892,000	78,927,000
Total long-term debt, less current portion	245,670,000
Long-term Debt	245,670,000	245,194,000
Liability for uncertain tax positions	38,329,000	32,155,000
Deferred income taxes	35,833,000	32,393,000
Deferred Revenue, Noncurrent	11,189,000	1,609,000
Other long-term liabilities	1,458,000	1,557,000
Mandatorily redeemable financial instrument	0	8,740,000
Total liabilities	447,371,000	400,575,000
Commitments and contingencies	0	0
Preferred stock, $0.01 par value	5,064,000
Common stock, $0.01 par value. Authorized 95,000,000 at December 31, 2013 and 2012; total issued and outstanding 46,105,076 and 45,094,191 shares at December 31, 2013 and 2012, respectively;	461,000	451,000
Additional paid-in capital	216,872,000	169,542,000
Retained earnings	484,850,000	424,790,000
Accumulated other comprehensive loss	4,235,000	(88,000)
Stockholders' equity attributable to j2 Global, Inc.	706,418,000	594,695,000
Stockholders' Equity Attributable to Noncontrolling Interest	0	(100,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	706,418,000	594,595,000
Total liabilities and stockholders' equity	1,153,789,000	995,170,000
Series A Preferred Stock [Member]
LIABILITIES AND STOCKHOLDERS' EQUITY
Preferred stock, $0.01 par value	0	0
Series B Preferred Stock [Member]
LIABILITIES AND STOCKHOLDERS' EQUITY
Preferred stock, $0.01 par value	$ 0	$ 0