Segment Information (Identifiable Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Segment Reporting, Asset Reconciling Item [Line Items]
Total Identifiable Assets	$ 1,071,540	$ 1,056,203
Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Identifiable Assets	(265,542)	(243,263)
U.S. [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Identifiable Assets	944,072	931,396
Europe [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Identifiable Assets	364,012	341,618
Other International [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Identifiable Assets	$ 28,998	$ 26,452