Dividend (Details) - $ / shares									12 Months Ended
	Sep. 13, 2019	Jun. 14, 2019	Mar. 14, 2019	Jan. 22, 2019	Sep. 14, 2018	Jun. 15, 2018	Mar. 16, 2018	Jan. 16, 2018	Sep. 30, 2019	Sep. 30, 2018
Equity [Abstract]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.11	$ 0.11	$ 0.11	$ 0.60	$ 0.48