Income Taxes (Details) - USD ($)	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2016
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent		21.00%
Deferred Tax Assets, Valuation Allowance	$ 3,500,000			$ 3,600,000
Income Tax Expense (Benefit)	$ 6.2	$ 25.5
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate		25.00%	137.00%
Deferred Income Tax Expense (Benefit)		$ 8,900,000
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		$ 12,000,000