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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2012
GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]  
Schedule of Goodwill [Table Text Block]
 
2012
 
2011
Balance at beginning of year
$
447,743

 
$
434,699

Goodwill acquired
648

 
15,425

Foreign currency translation
3,960

 
(2,381
)
Balance at year end
$
452,351

 
$
447,743
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Table Text Block]
 
2012
 
2011
 
Gross
Amount
 
Accumulated
Amortization
 
Gross
Amount
 
Accumulated
Amortization
Customer relationships
$
96,575

 
$
(21,928
)
 
$
95,203

 
$
(18,735
)
Proven technology and patents
42,960

 
(28,014
)
 
41,643

 
(25,174
)
Tradename (finite life)
3,972

 
(1,345
)
 
3,995

 
(1,072
)
Tradename (indefinite life)
25,061

 
—

 
25,033

 
—

Other
745

 
(462
)
 
743

 
(226
)
 
$
169,313

 
$
(51,749
)
 
$
166,617

 
$
(45,207
)