Dispositions (Details) $ in Thousands	3 Months Ended
Mar. 31, 2016 USD ($) item
Dispositions
Gain on sale of non-core online properties	$ 973
Certain non-core online properties \| Sold
Dispositions
Number of properties sold \| item	1
Consideration received or receivable	$ 1,000
Other income, net \| Certain non-core online properties \| Sold
Dispositions
Gain on sale of non-core online properties	$ 1,000

Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

No definition available.

Name:	us-gaap_GainLossOnSaleOfBusiness
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration