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Property, Plant & Equipment
12 Months Ended
Dec. 31, 2012
Property, Plant & Equipment [Abstract]  
Property, Plant & Equipment
(5) Property, Plant & Equipment

The following is a summary of the Company's P. P. & E. balances at December 31:

(Thousands of dollars)
 
2012
  
2011
 
        
Land
 $29,026  $27,883 
Land improvements
  13,142   10,379 
Buildings
  158,984   137,923 
Machinery and equipment
  310,944   306,151 
Furniture and fixtures
  9,647   8,779 
Computer equipment and software
  37,708   16,359 
Construction in progress
  125,545   106,789 
Total property, plant and equipment
  684,996   614,263 
Less accumulated depreciation
  (283,323)  (267,833)
Total property, plant and equipment, net
 $401,673  $346,430 
 
Depreciation expense related to property, plant and equipment was $28.5 million, $21.6 million and $19.4 million in 2012, 2011 and 2010, respectively.

As of December 31, 2012 there was $6.6 million of additions to property, plant and equipment in accounts payable.
 
The Romanian Government granted an economic incentive to the Company for the construction of its Romanian facility, which was ongoing at December 31, 2012. This incentive is subject to employment requirements the Company must maintain for five years. For the years ended December 31, 2012 and 2011 capital expenditures were reduced by $18.1 million and $5.9 million in the additions to property, plant, and equipment on the Consolidated Statements of Cash Flows as a result of incentives received from the government.