Preferred Stock - Narrative (Details) - $ / shares	Mar. 31, 2019	Jun. 30, 2018	Oct. 02, 2017
Class of Stock [Line Items]
Preferred Stock, Shares Authorized (shares)	500,000	500,000
Preferred stock, par value (in US$ per share)	$ 1	$ 1
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized (shares)	21,000,000
Preferred stock, issued (in shares)	14,700,000
Preferred stock, par value (in US$ per share)	$ 1,000
Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized (shares)	21,000
Cumulative Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized (shares)	21,000	21,000
Preferred stock, issued (in shares)	14,700	14,700	14,700