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Business Acqusition Business Acquisition (Tables)
12 Months Ended
Dec. 31, 2020
Business Combinations [Abstract]  
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
The following table summarizes the estimated fair values of the assets acquired and liabilities assumed as a result of the Buffalo Filter Acquisition.

Cash$119 
Accounts receivable4,587 
Inventory4,582 
Other current assets146 
Current assets9,434 
Property, plant & equipment4,036 
Deferred income taxes80 
Goodwill215,793 
Customer relationships124,000 
Developed technology9,000 
Trademarks & tradenames7,000 
Other non-current assets166 
Total assets acquired$369,509 
Current liabilities assumed4,462 
Total liabilities assumed4,462 
Net assets acquired$365,047 
Business Acquisition, Pro Forma Information
20192018
Net sales$960,115 $898,545 
Net income44,361 10,407