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Inventories (Tables)
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventories Inventories consisted of the following on a cost basis, net of reserves for obsolescence and LIFO:
 December 31,
(in thousands)20192018
Finished goods and parts$227,823  $149,298  
Work in process21,918  12,732  
Raw materials17,933  14,600  
Inventory, net$267,674  $176,630