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Loans and Allowance for Credit Losses - Credit risk profile based on rating and payment activity (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL | $ 3,200 | $ 5,900
Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL | 9,000 | 10,300
Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL | 0 | 0
Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL | 2,700 | 5,600
Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL | $ 0 | 0
Residential Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 627,357
Residential Real Estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 620,004
Residential Real Estate | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 1,900
Residential Real Estate | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 5,453
Construction Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 107,472
Construction Real Estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 103,105
Construction Real Estate | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 4,367
Commercial Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 887,419
Commercial Real Estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 829,276
Commercial Real Estate | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 45,262
Commercial Real Estate | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 403
Commercial Real Estate | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 11,590
Commercial Real Estate | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 888
Consumer loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 80,767
Consumer loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 80,517
Consumer loans | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 45
Consumer loans | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 25
Consumer loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 180
Commercial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 468,448
Commercial loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 457,385
Commercial loans | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | 4,708
Commercial loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
PCD loans receivable, net of ACL |  | $ 6,355

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