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Changes in Accumulated Other Comprehensive Income (Loss) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Changes in Accumulated Other Comprehensive Income Loss [Line Items]      
Defined Benefit Pension, Balance January 1 $ (5,329)    
Defined Benefit Pension, Other comprehensive income (loss) before reclassifications 0    
Defined Benefit Pension, Amounts reclassified from accumulated other comprehensive income (loss) 6,936    
Defined Benefit Pension, Other comprehensive income (loss) (6,936) 5,329 0
Defined Benefit Pension, Balance December 31 1,607 (5,329)  
Foreign Currency Translation, Balance January 1 (2,116)    
Foreign Currency Translation, Other comprehensive income (loss) before reclassifications (288)    
Foreign Currency Translation, Amounts reclassified from accumulated other comprehensive income (loss) 0    
Foreign Currency Translation, Other comprehensive income (loss) (288)    
Foreign Currency Translation, Balance January 1 (2,404) (2,116)  
Total, Balance January 1 (7,445)    
Total, Other comprehensive income (loss) before reclassifications 0    
Total, Amounts reclassified from accumulated other comprehensive income (loss) 6,648    
Total, Other comprehensive income (loss) 6,648    
Total, Balance December 31 $ (797) $ (7,445)