Segment Information (Identifiable Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting, Asset Reconciling Item [Line Items]
Total Identifiable Assets	$ 1,056,203	$ 768,892	$ 712,801
Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Identifiable Assets	(243,263)	(84,178)	(62,560)
U.S. [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Identifiable Assets	931,396	714,110	665,553
Europe [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Identifiable Assets	341,618	108,894	93,182
Other International [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Identifiable Assets	$ 26,452	$ 30,066	$ 16,626