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Segment Information (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
item
Mar. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Segment Information        
Number of reportable segments 3      
Segment Information        
Net sales $ 168,288 $ 154,281    
Income (loss) from operations 19,606 9,013    
Total assets 953,169 871,547 953,613  
Cash and cash equivalent balances 211,988 141,965 251,208 175,553
Administrative and all other
        
Segment Information        
Income (loss) from operations (885) (883)    
Total assets 89,308 78,675 93,473  
Cash and cash equivalent balances 116,100 62,500 156,000  
Intersegment elimination
        
Segment Information        
Net sales 4,668 5,177    
North America
        
Segment Information        
Net sales 136,882 127,737    
Income (loss) from operations 22,561 15,260    
Total assets 630,323 580,882 627,196  
North America | Intersegment elimination
        
Segment Information        
Net sales 1,130 761    
Europe
        
Segment Information        
Net sales 27,647 23,900    
Income (loss) from operations (919) (4,180)    
Total assets 203,606 182,687 201,384  
Europe | Intersegment elimination
        
Segment Information        
Net sales 466 280    
Asia/Pacific
        
Segment Information        
Net sales 3,759 2,644    
Income (loss) from operations (1,151) (1,184)    
Total assets 29,932 29,303 31,560  
Asia/Pacific | Intersegment elimination
        
Segment Information        
Net sales $ 3,072 $ 4,136