Other Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Disposal Group [Line Items]
Gain on sale of assets, net	$ 0	$ 0	$ 0	$ 13,437
Business.com
Disposal Group [Line Items]
Gain on sale of assets, net				$ 13,400