Operating Segments and Related Information Operating Segments and Related Information (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 348,452	$ 375,969	[1]
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	198,897	196,299	[1]
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	80,714	92,472	[1]
Other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 68,841	$ 87,198	[1]

[1] Amounts have been adjusted for the reclassification of certain discontinued operations to continuing operations.