Investment Securities - Schedule of amortized cost and estimated fair value of Held to maturity investments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Held to maturity
Amortized Cost	$ 223,306	$ 118,627
Gross Unrealized Gains	2,225	2,636
Gross Unrealized (Losses)	(810)	(62)
Estimated Fair Value	224,721	121,201
Carrying Value	223,306	118,627
U.S. government sponsored enterprise MBS
Held to maturity
Amortized Cost	220,448	115,763
Gross Unrealized Gains	2,209	2,636
Gross Unrealized (Losses)	(810)	(45)
Estimated Fair Value	221,847	118,354
Carrying Value	220,448	115,763
U.S. SBA securities
Held to maturity
Amortized Cost	1,858	2,064
Gross Unrealized Gains	16	0
Gross Unrealized (Losses)	0	(17)
Estimated Fair Value	1,874	2,047
Carrying Value	1,858	2,064
Certificate of deposits
Held to maturity
Amortized Cost	1,000	800
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	0	0
Estimated Fair Value	1,000	800
Carrying Value	$ 1,000	$ 800

Amount of investment in debt security measured at amortized cost (held-to-maturity).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
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-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269820-111563

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