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Goodwill and Intangible Assets - Schedule of Estimated Amortization Expense (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Jun. 30, 2016
Acquired Finite-Lived Intangible Assets [Line Items]    
2017 $ 281  
2018 150  
2019 127  
2020 111  
2021 106  
Thereafter 719  
Estimated amortization expense 1,494 $ 2,091
MSRs [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
2017 19  
2018 39  
2019 39  
2020 39  
2021 38  
Thereafter 522  
Estimated amortization expense 696 624
Core deposit intangibles [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
2017 262  
2018 111  
2019 88  
2020 72  
2021 68  
Thereafter 197  
Estimated amortization expense $ 798 $ 1,467