Investment Securities - Investments with Unrealized Loss Positions for Held to maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jun. 30, 2019
Schedule of Held-to-maturity Securities [Line Items]
Unrealized Holding Losses Less Than 12 Months, Fair Value	$ 12,057	$ 6,507
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses	88	8
Unrealized Holding Losses 12 Months or More, Fair Value	2,072	4,540
Unrealized Holding Losses 12 Months or More, Unrealized Losses	11	12
Unrealized Holding Losses Total, Fair Value	14,129	11,047
Unrealized Holding Losses Total, Unrealized Losses	99	20
Private Issue CMO
Schedule of Held-to-maturity Securities [Line Items]
Unrealized Holding Losses Less Than 12 Months, Fair Value	197
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses	22
Unrealized Holding Losses Total, Fair Value	197
Unrealized Holding Losses Total, Unrealized Losses	22
U.S. government sponsored enterprise MBS
Schedule of Held-to-maturity Securities [Line Items]
Unrealized Holding Losses Less Than 12 Months, Fair Value	12,057	6,507
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses	88	8
Unrealized Holding Losses 12 Months or More, Fair Value		1,657
Unrealized Holding Losses 12 Months or More, Unrealized Losses		6
Unrealized Holding Losses Total, Fair Value	12,057	8,164
Unrealized Holding Losses Total, Unrealized Losses	88	14
U.S. SBA securities
Schedule of Held-to-maturity Securities [Line Items]
Unrealized Holding Losses Less Than 12 Months, Fair Value	0
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses	0
Unrealized Holding Losses 12 Months or More, Fair Value	2,072	2,883
Unrealized Holding Losses 12 Months or More, Unrealized Losses	11	6
Unrealized Holding Losses Total, Fair Value	2,072	2,883
Unrealized Holding Losses Total, Unrealized Losses	$ 11	$ 6

Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer.

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

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for less than 12 months.

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