Summary of Significant Accounting Policies and Practices (Newly Adopted Accounting Pronouncements) (Details) - USD ($) $ in Thousands	Jul. 01, 2019	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ 695,017		$ 878,516
ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings			$ 163
ASU 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings			$ (348)
ASU 2016-02 | Subsequent Event | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liabilities	$ 85
Right-of-use assets	85
ASU 2016-02 | Subsequent Event | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liabilities	95
Right-of-use assets	$ 95