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Employee Benefit Plans (Change in Defined Benefit Plan) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Change in benefit obligation    
Beginning balance $ 124,751 $ 109,877
Service cost 313 317
Interest cost 5,384 5,638
Actuarial gain (loss) 21,765 7,134
Benefits paid (6,719) (3,506)
Settlements 240 0
Currency changes - benefit obligation 3,582 5,291
Benefit obligation at December 31 149,316 124,751
Change in plan assets    
Beginning balance - fair value 106,898 96,384
Employer contribution 2,960 1,904
Actual return on plan assets 10,987 7,536
Benefits paid (6,719) (3,506)
Currency changes - plan assets 2,441 4,580
Fair value of plan assets at December 31 116,567 106,898
Underfunded status at December 31 $ (32,749) $ (17,853)