Operating Segments and Related Information (Details 5) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 1,015,745	$ 993,186
United States
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	600,261	584,623
Europe [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	359,444	353,800
Other Geographic Region [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 56,040	$ 54,763