CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares		3 Months Ended		6 Months Ended
	Feb. 21, 2020	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividends paid on common stock per share (in dollars per share)	$ 0.22	$ 0.22	$ 0.20	$ 0.43	$ 0.38