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Securities Available for Sale - Sales of Securities Available for Sale (Detail) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Investments Debt And Equity Securities [Abstract]    
Proceeds from sales of securities $ 3,646 $ 0
Gross realized gains 12 0
Gross realized losses (28) 0
Net loss on sales of securities $ (16) $ 0