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Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories consisted of the following at December 31:
(In thousands)20212020
Raw materials:  
Fluids Systems$119,242 $98,974 
Industrial Solutions4,939 6,315 
Total raw materials124,181 105,289 
Blended fluids systems components27,793 31,744 
Finished goods mats
3,367 10,824 
Total inventories$155,341 $147,857