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Property and Equipment
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
Property and equipment consists of the following:
  December 31,
(in thousands)Estimated Useful Lives20202019
Equipment1-15 years$123,139 $105,428 
Computer software1-5 years34,469 33,878 
Buildings and improvements2-40 years38,332 38,095 
Leasehold improvements1-17 years25,237 19,876 
Furniture1-13 years14,902 12,766 
Land2,696 2,696 
Property and equipment, gross238,775 212,739 
Less: Accumulated depreciation(142,272)(129,103)
Property and equipment, net$96,503 $83,636 

Depreciation expense related to property and equipment was $28.0 million, $23.6 million and $18.4 million for the years ended December 31, 2020, 2019 and 2018, respectively.