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Property, Plant, and Equipment
 12 Months Ended
Mar. 31, 2020
Property, Plant and Equipment, Net [Abstract]  
Property, Plant and Equipment Property, Plant, and Equipment
 
Consolidated property, plant, and equipment of the Company consisted of the following:

 
 
March 31,
 
 
2020
 
2019
Land and land improvements
 
$
4,985

 
$
5,105

Buildings
 
39,930

 
39,121

Machinery, equipment, and leasehold improvements
 
228,140


230,754

Construction in progress
 
12,950

 
12,242

 
 
286,005


287,222

Less accumulated depreciation
 
206,532


199,919

Net property, plant, and equipment
 
$
79,473


$
87,303


 
Depreciation expense was $16,184,000, $17,775,000, and $20,584,000 for the years ended March 31, 2020, 2019, and 2018, respectively.

Gross property, plant, and equipment includes capitalized software costs of $37,864,000 and $37,832,000 at March 31, 2020 and 2019, respectively.  Accumulated depreciation includes accumulated amortization on capitalized software costs of $22,962,000 and $20,225,000 at March 31, 2020 and 2019, respectively.  Amortization expense on capitalized software costs was $2,937,000, $3,045,000, and $3,151,000 during the years ended March 31, 2020, 2019, and 2018, respectively.