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Inventories (Tables)
 12 Months Ended
Dec. 31, 2014
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories at December 31 consisted of the following (in thousands):
 
2014
 
2013
Raw material
$
58,665

 
$
52,751

Work-in-process
12,841

 
11,100

Finished goods
57,237

 
57,301

Total inventories
$
128,743

 
$
121,152
Summary of Activity within the Reserve for Excess, Obsolete, and Slow Moving Inventory
The following table summarizes activity recorded within the reserve for excess, obsolete and slow moving inventory for the years ended December 31 (in thousands):
 
2014
 
2013
 
2012
Beginning balance
5,570

 
4,907

 
4,146

Excess, obsolete and slow moving inventory expense
731

 
2,068

 
2,417

Reserves from acquisitions
—

 
35

 
95

Scrapped inventory and other adjustments
(726
)
 
(1,440
)
 
(1,751
)
Ending balance
$
5,575

 
$
5,570

 
$
4,907