Derivative and Other Financial Instruments with Off-Balance Sheet Risks - Summary of the recourse liability (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Summary Of Recourse Liability [Roll Forward]
Balance, beginning of the period	$ 160	$ 390	$ 200	$ 270
Provision for recourse liability	0	0	40	(120)
Net settlements in lieu of loan repurchases	0	(175)	0	(175)
Balance, end of the period	$ 160	$ 215	$ 160	$ 215

Amount represents the difference between the cash acquisition price of the debt and the net carrying amount of the debt at the time of its extinguishment.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123467658&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467658&loc=d3e12317-112629

Name:	us-gaap_GainsLossesOnRecourseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration