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Accrued Expenses and Other Current Liabilities (Schedule of Accrued Expenses and Other Current Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Accounts Payable and Accrued Liabilities, Current [Abstract]    
Accrued compensation and employee benefits $ 196,846 $ 196,847
Other accrued expenses 134,834 93,645
Total $ 331,680 $ 290,492