Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2017	Sep. 30, 2018	Jun. 30, 2018
Income Tax Authority [Line Items]
Federal statutory income tax rate		35.00%
Federal [Member]
Income Tax Authority [Line Items]
Accrued income taxes			$ 5.7
Prepaid income taxes				$ 3.6
State and Local [Member]
Income Tax Authority [Line Items]
Accrued income taxes			$ 0.4
Prepaid income taxes				$ 0.9
Scenario, Forecast [Member]
Income Tax Authority [Line Items]
Federal statutory income tax rate	21.00%