Subsequent Events (Details) (Subsequent Event [Member], Game platform operating company [Member], USD $) In Thousands, unless otherwise specified	1 Months Ended
Jan. 31, 2014
Subsequent Event [Member] \| Game platform operating company [Member]
Subsequent Event [Line Items]
Percentage of economic ownership	100.00%
Cash consideration	$ 67,400

Amount of cash consideration, consisting of acquisition-date fair value of assets by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

No definition available.

Name:	qihu_BusinessCombinationCashConsideration
Namespace Prefix:	qihu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant