Unrestricted Subsidiaries Unrestricted Subsidiaries (Financial Position) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2010
Cash and cash equivalents	$ 214,926		$ 218,680	$ 142,873	$ 139,359
Accounts receivable	62,270		37,285
Prepaid expenses and other current assets	16,828		15,388
Deferred income taxes	4,045		1,092
Assets, Current	407,016		377,499
Property and equipment, net	28,453		19,599
Tradenames, net	85,606		71,409
Customer Relationships, Net	84,490		64,723
Goodwill	433,940		407,825
Other purchased intangibles, net	10,514		9,855
Deferred income taxes	3,670		1,852
Other assets	3,132		3,238
Assets	1,103,879		995,170
Accounts payable and accrued expenses	67,091		39,874
Deferred revenue, current	34,891		30,493
Liabilities, Current	113,592		78,927
Deferred income taxes	41,279		32,393
Other long-term liabilities	1,155		1,557
Mandatorily redeemable financial instrument	9,408		8,740
Liabilities	459,478		400,575
Commitments and contingencies	0		0
Common Stock, Value, Issued	456		451
Additional paid-in capital	181,274		169,542
Retained Earnings (Accumulated Deficit)	460,880		424,790
Accumulated Other Comprehensive Income (Loss), Net of Tax	2,797	980	(88)
Stockholders' Equity Attributable to Parent	645,407		594,695
Liabilities and Equity	1,103,879		995,170
Ziff Davis, Inc [Member]
Cash and cash equivalents	17,635
Accounts receivable	40,230
Prepaid expenses and other current assets	4,637
Deferred income taxes	3,197
Assets, Current	65,699
Property and equipment, net	11,691
Tradenames, net	51,388
Customer Relationships, Net	40,998
Goodwill	128,054
Other purchased intangibles, net	2,368
Deferred income taxes	233
Other assets	1,168
Assets	301,599
Accounts payable and accrued expenses	25,696
Deferred revenue, current	2,211
Liabilities, Current	27,907
Notes Payable, Related Parties, Noncurrent	67,500
Interest Payable, Noncurrent	3,717
Deferred income taxes	30,610
Other long-term liabilities	47
Mandatorily redeemable financial instrument	192,397
Liabilities	322,178
Commitments and contingencies	0
Common Stock, Value, Issued	0
Additional paid-in capital	(18,122)
Retained Earnings (Accumulated Deficit)	(2,552)
Accumulated Other Comprehensive Income (Loss), Net of Tax	95
Stockholders' Equity Attributable to Parent	(20,579)
Liabilities and Equity	$ 301,599