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Stock-based Compensation - Summary of ESOP Shares (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Allocated shares 127,102 109,018
Shares committed for release 9,622 19,245
Unearned shares 221,318 230,940
Total ESOP shares 358,042 359,203
Fair value of unearned ESOP shares [1] $ 5,095 $ 4,829
[1] Based on closing price of $23.02 and $20.91 per share on December 31, 2019, and June 30, 2019, respectively.