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Other Selling and Administrative Expenses
 3 Months Ended
Mar. 31, 2021
Other Income and Expenses [Abstract]  
Other Selling and Administrative Expenses Other Selling and Administrative Expenses
Other selling and administrative expenses include the following:
 For the Three Months Ended
 March 31,
2021		March 31,
2020
 (In thousands)
Design and development$43,981 $44,628 
Identifiable intangible asset amortization9,514 9,965