Investment Securities - Investments with Unrealized Loss Positions for Held to maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019
Schedule of Held-to-maturity Securities [Line Items]
Unrealized Holding Losses Less Than 12 Months, Fair Value	$ 7,312	$ 6,507
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses	39	8
Unrealized Holding Losses 12 Months or More, Fair Value	4,333	4,540
Unrealized Holding Losses 12 Months or More, Unrealized Losses	15	12
Unrealized Holding Losses Total, Fair Value	11,645	11,047
Unrealized Holding Losses Total, Unrealized Losses	54	20
U.S. government sponsored enterprise MBS
Schedule of Held-to-maturity Securities [Line Items]
Unrealized Holding Losses Less Than 12 Months, Fair Value	7,312	6,507
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses	39	8
Unrealized Holding Losses 12 Months or More, Fair Value	1,478	1,657
Unrealized Holding Losses 12 Months or More, Unrealized Losses	2	6
Unrealized Holding Losses Total, Fair Value	8,790	8,164
Unrealized Holding Losses Total, Unrealized Losses	41	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	2,855	2,883
Unrealized Holding Losses 12 Months or More, Unrealized Losses	13	6
Unrealized Holding Losses Total, Fair Value	2,855	2,883
Unrealized Holding Losses Total, Unrealized Losses	$ 13	$ 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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