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Securities - Amortized Cost and Fair Value of Available-for-Sale Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Debt Securities, Available-for-sale [Line Items]
Within one year, Amortized Cost
One to five years, Amortized Cost	6,100
Five to ten years, Amortized Cost	4,458
After ten years, Amortized Cost	1,997
Amortized Cost	12,555
Amortized Cost	155,588	$ 144,905
Within one year, Fair Value
One to five years, Fair Value	6,658
Five to ten years, Fair Value	4,856
After ten years, Fair Value	2,025
Fair Value	13,539
Fair Value	162,394	146,291
Mortgage-backed Securities - GSE Residential [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	143,033	124,615
Fair Value	$ 148,855	$ 125,510

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- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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