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Debt - Summary of FHLB Debt Matures (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
2020 $ 55,881  
2021 44,972  
2022 40,526  
2023 24,437  
Total $ 165,816 $ 181,100