Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020
Statement Of Stockholders Equity [Abstract]
Common stock dividends declared (per share)	$ 0.06	$ 0.06	$ 0.06	$ 0.04	$ 0.04	$ 0.04
ESOP shares committed to be released (in shares)	23,888	24,419	24,419	23,888	24,419	24,419