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Other Selling and Administrative Expenses
 9 Months Ended
Sep. 30, 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 EndedFor the Nine Months Ended
 September 30,
2021		September 30,
2020		September 30,
2021		September 30,
2020
 (In thousands)
Design and development$47,739 $45,495 $138,466 $136,609 
Identifiable intangible asset amortization9,514 9,813 28,572 29,465