Income Taxes Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	35.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ 7,854
Tax Cuts and Jobs Act - Transition tax amount	1,798		$ 3,877
Tax Cuts and Jobs Act - Foreign Tax credit	2,285
Tax Cuts and Jobs Act - Adjustment	169
Tax Cuts and Jobs Act - Net Tax Benefit	$ 12,106