Income Taxes (Detail Textual) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		6 Months Ended
	Dec. 22, 2017	Dec. 21, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Income Tax [Line Items]
Liability for unrecognized tax benefits			$ 1.9		$ 1.9		$ 1.7
Unrecognized tax benefit that would impact the company's effective tax rate			$ 1.9		$ 1.9
Effective tax rate, percentage			(84.70%)	37.60%	(38.60%)	36.80%
Statutory U.S. Income Tax Rate	28.06%	35.00%
TCJA remeasurement of net deferred tax liabilities			$ (94.8)		$ (94.8)
TCJA one-time transition tax liability			9.7		$ 9.7
TCJA one-time transition tax liability payment term					8 years
TCJA overall impact on results of operations			$ (92.3)		$ (92.3)
TCJA overall impact on diluted earnings per share			$ 3.66		$ 3.66
FY 2019 [Member]
Income Tax [Line Items]
Statutory U.S. Income Tax Rate	21.00%