Operating Segments and Related Information (Details 5) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 980,036	$ 881,390
United States
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	582,387	587,592
Europe
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	386,871	284,171
Other
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 10,778	$ 9,627