Operating Segments and Related Information Operating Segments and Related Information (Details 5) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 972,676	$ 980,036
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	584,512	582,387
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	336,654	386,871
Other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 51,510	$ 10,778