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Other Selling and Administrative Expenses - Summary (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Other Income and Expenses [Abstract]        
Design and development $ 48,811 $ 48,766 $ 143,441 $ 154,987
Identifiable intangible asset amortization $ 9,824 $ 10,195 $ 30,162 $ 29,925