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Fair Value of Financial Instruments (Schedule of Changes in Fair Value of Contingent Considerations) (Details) - Modern Communications & Cloud - Significant unobservable inputs (Level 3)
$ in Thousands
3 Months Ended
Sep. 30, 2020
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Fair value at beginning of period $ 46,334
Change in fair value of contingent consideration 516
Fair value at end of period $ 46,850