XML 24 R11.htm IDEA: XBRL DOCUMENT v3.22.0.1
Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
 
Property, plant and equipment consist of the following at December 31:

 20212020
Land$4,027 $4,027 
Building and improvements95,518 93,886 
Machinery and equipment256,478 243,810 
Construction in progress16,601 15,680 
 372,624 357,403 
Less:  Accumulated depreciation(263,761)(245,996)
 $108,863 $111,407 
 
Internal-use software, included in gross machinery and equipment at December 31, 2021 and 2020 was $49.1 million and $50.3 million, respectively, with related accumulated depreciation of $45.3 million and $42.9 million, respectively. Internal use software depreciation expense was $3.3 million, $4.7 million and $4.8 million for the years ended December 31, 2021, 2020 and 2019, respectively. Also, during 2020, we sold a vacant facility for $3.2 million.