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Other Selling and Administrative Expenses (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Other Income and Expenses [Abstract]        
Design and development $ 46,747 $ 46,486 $ 90,728 $ 91,113
Identifiable intangible asset amortization $ 9,544 $ 9,687 $ 19,058 $ 19,652