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Inventories (Tables)
 12 Months Ended
Dec. 31, 2013
Inventory Disclosure [Abstract]  
Schedule of Inventory
The Company's significant components of inventory at December 31, 2013 and 2012 were as follows (in thousands):

 
December 31,
2013
 
December 31,
2012
Raw materials and parts
$
139,573

 
$
145,970

Work in process
51,819

 
86,558

Finished goods
276,076

 
243,726

Gross inventories
467,468

 
476,254

Inventory reserve
(26,419
)
 
(21,125
)
Inventories
$
441,049

 
$
455,129
Schedule of Inventory Reserve
The change in the amounts of the inventory reserve during the three year period ended December 31, 2013 is as follows (in thousands):
Period ended
 
Balance at beginning of period
 
Charged to expense
 
Deductions or other
 
Balance at end of period
December 31, 2011
 
$
10,106

 
$
10,910

 
$
(3,576
)
 
$
17,440

December 31, 2012
 
17,440

 
6,107

 
(2,422
)
 
21,125

December 31, 2013
 
21,125

 
10,093

 
(4,799
)
 
26,419