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Securities - Amortized Cost and Approximate Fair Value of Securities, Together with Gross Unrealized Gains and Losses of Securities (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Jun. 30, 2022
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Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 237,410 | $ 245,052
Gross Unrealized Gains | 100 | 54
Gross Unrealized Losses | (29,412) | (24,200)
Fair Value | 208,098 | 220,906
U.S. Treasury [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,996 | 3,483
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (74) | (83)
Fair Value | 1,922 | 3,400
U.S. Government and Federal Agency [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 6,975 | 9,488
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (496) | (367)
Fair Value | 6,479 | 9,121
Mortgage-backed: GSE Residential [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 206,631 | 210,367
Gross Unrealized Gains | 99 | 47
Gross Unrealized Losses | (26,652) | (22,229)
Fair Value | 180,078 | 188,185
Small Business Administration [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 18,366 | 17,960
Gross Unrealized Gains | 0 | 3
Gross Unrealized Losses | (2,190) | (1,521)
Fair Value | 16,176 | 16,442
State and Political Subdivisions [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 3,442 | 3,754
Gross Unrealized Gains | 1 | 4
Gross Unrealized Losses | 0 | 0
Fair Value | $ 3,443 | $ 3,758

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: 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 https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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