Annual report pursuant to Section 13 and 15(d)

EQUIPMENT AND PROPERTY (Details)

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EQUIPMENT AND PROPERTY (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]      
Net equipment and property $ 87,215 $ 82,263  
Depreciation expense 14,415 15,212 15,112
Foreign Countries [Member]
      
Property, Plant and Equipment [Line Items]      
Net equipment and property 1,900 2,300  
Building [Member]
      
Property, Plant and Equipment [Line Items]      
Gross equipment and property 46,574 45,527  
Operating Equipment [Member]
      
Property, Plant and Equipment [Line Items]      
Gross equipment and property 90,793 79,411  
Furniture and Fixtures [Member]
      
Property, Plant and Equipment [Line Items]      
Gross equipment and property 13,477 12,479  
Computer Equipment and Systems [Member]
      
Property, Plant and Equipment [Line Items]      
Gross equipment and property 56,564 54,501  
Plant and Equipment [Member]
      
Property, Plant and Equipment [Line Items]      
Gross equipment and property 207,408 191,918  
Less--Accumulated Depreciation (144,877) (134,368)  
Net equipment and property 62,531 57,550  
Land [Member]
      
Property, Plant and Equipment [Line Items]      
Gross equipment and property $ 24,684 $ 24,713