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Securities - Association's Investments Gross Unrealized Investment Losses and Fair Value of Association's Investments with Unrealized Losses (Detail) - USD ($)
$ in Thousands
Jun. 30, 2022
Jun. 30, 2021
Less than 12 Months, Fair Value $ 169,518 $ 80,958
Less than 12 Months, Unrealized Losses (16,877) (1,289)
12 Months or More, Fair Value 39,615 4,160
12 Months or More, Unrealized Losses (7,323) (48)
Total Fair Value 209,133 85,118
Total, Unrealized Losses (24,200) (1,337)
US Treasury [Member]    
Less than 12 Months, Fair Value 3,400  
Less than 12 Months, Unrealized Losses (83)  
12 Months or More, Fair Value 0  
12 Months or More, Unrealized Losses 0  
Total Fair Value 3,400  
Total, Unrealized Losses (83)  
U.S. Government and Federal Agency [Member]    
Less than 12 Months, Fair Value 9,121  
Less than 12 Months, Unrealized Losses (367)  
12 Months or More, Fair Value 0  
12 Months or More, Unrealized Losses 0  
Total Fair Value 9,121  
Total, Unrealized Losses (367)  
Mortgage-backed Securities - GSE Residential [Member]    
Less than 12 Months, Fair Value 144,042 75,002
Less than 12 Months, Unrealized Losses (15,267) (1,259)
12 Months or More, Fair Value 37,587 4,160
12 Months or More, Unrealized Losses (6,962) (48)
Total Fair Value 181,629 79,162
Total, Unrealized Losses (22,229) (1,307)
Small Business Administration [Member]    
Less than 12 Months, Fair Value 12,955 5,956
Less than 12 Months, Unrealized Losses (1,160) (30)
12 Months or More, Fair Value 2,028 0
12 Months or More, Unrealized Losses (361) 0
Total Fair Value 14,983 5,956
Total, Unrealized Losses $ (1,521) $ (30)