Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 21,152	$ 18,187	$ 64,961	$ 57,529
Changes in unrealized gains/losses on AFS securities, net of taxes of $10,043, $(1,841), $34,710, and $4,506	(31,117)	5,703	(107,544)	(14,091)
Changes in unrealized gains/losses on cash flow hedges, net of taxes of $(1,646), $29, $(7,076), and $(5,500)	5,099	(88)	21,924	17,258
Comprehensive income (loss)	$ (4,866)	$ 23,802	$ (20,659)	$ 60,696