Operating Segments and Related Information Operating Segments and Related Information (Details 5) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 1,020,609	$ 1,015,745
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	617,096	600,261
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	346,865	359,444
Other International
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 56,648	$ 56,040