CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares	Sep. 30, 2019	Sep. 30, 2018
Statement of Financial Position [Abstract]
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	63,979,000	64,371,000
Common stock, shares outstanding (in shares)	63,979,000	64,371,000