Fair Value Measurements (Schedule of Fair Value for Financial Assets and Liabilities Measured on Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018
Assets
Total assets measured at fair value	$ 887	$ 1,459
Liabilities
Acquisition-related contingent consideration obligations	11,233	12,749
Total liabilities measured at fair value	11,233	12,749
Marketable securities
Assets
Investments	887	1,459
Level 1
Assets
Total assets measured at fair value	887	1,459
Level 1 | Marketable securities
Assets
Investments	887	1,459
Level 3
Liabilities
Acquisition-related contingent consideration obligations	11,233	12,749
Total liabilities measured at fair value	$ 11,233	$ 12,749