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Other Selling and Administrative Expenses (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Other Income and Expenses [Abstract]        
Design and development $ 47,739 $ 45,495 $ 138,466 $ 136,609
Identifiable intangible asset amortization $ 9,514 $ 9,813 $ 28,572 $ 29,465