Income Taxes (Narrative) (Details) - USD ($)	6 Months Ended	9 Months Ended
	Dec. 31, 2017	Mar. 31, 2019
Income Tax Disclosure [Line Items]
Federal statutory corporate tax rate		21.00%
Re-measurement of U.S. deferred tax assets and related valuation allowance		$ 0
Transition tax rate, cash and cash equivalents		15.50%
Transition tax rate, other than cash and cash equivalents		8.00%
Transition tax payment period		8 years
Transition tax related to cash payments		$ 0
Maximum [Member]
Income Tax Disclosure [Line Items]
Federal statutory corporate tax rate	35.00%