Quarterly report pursuant to Section 13 or 15(d)

Securities - Available for Sale Securities, Continuous Unrealized Loss Position, Fair value (Detail)

v3.20.1
Securities - Available for Sale Securities, Continuous Unrealized Loss Position, Fair value (Detail)
$ in Thousands
Mar. 31, 2020
USD ($)
Security
Dec. 31, 2019
USD ($)
Security
Summary of Investment Holdings [Line Items]    
Available-for-Sale Within One Year, Gross Unrealized Loss $ (30) $ (318)
Available-for-Sale Within One Year, Estimated Fair Value $ 12,876 $ 100,916
Available-for-Sale Within One Year, Number of Securities | Security 4 33
Available-for-Sale More than One Year, Gross Unrealized Loss $ (2) $ (483)
Available-for-Sale More than One Year, Estimated Fair Value $ 351 $ 61,690
Available-for-Sale More than One Year, Number of Securities | Security 2 51
Available-for-Sale, Gross Unrealized Loss $ (32) $ (801)
Available-for-Sale, Estimated Fair Value $ 13,227 $ 162,606
Available-for-Sale, Number of Securities | Security 6 84
Mortgage-backed securities    
Summary of Investment Holdings [Line Items]    
Available-for-Sale Within One Year, Gross Unrealized Loss $ (16) $ (186)
Available-for-Sale Within One Year, Estimated Fair Value $ 11,626 $ 51,261
Available-for-Sale Within One Year, Number of Securities | Security 3 17
Available-for-Sale More than One Year, Gross Unrealized Loss $ (1) $ (161)
Available-for-Sale More than One Year, Estimated Fair Value $ 1 $ 18,757
Available-for-Sale More than One Year, Number of Securities | Security 1 14
Available-for-Sale, Gross Unrealized Loss $ (17) $ (347)
Available-for-Sale, Estimated Fair Value $ 11,627 $ 70,018
Available-for-Sale, Number of Securities | Security 4 31
Collateralized mortgage obligations    
Summary of Investment Holdings [Line Items]    
Available-for-Sale Within One Year, Gross Unrealized Loss $ (14) $ (112)
Available-for-Sale Within One Year, Estimated Fair Value $ 1,250 $ 41,419
Available-for-Sale Within One Year, Number of Securities | Security 1 14
Available-for-Sale More than One Year, Gross Unrealized Loss $ (1) $ (320)
Available-for-Sale More than One Year, Estimated Fair Value $ 350 $ 39,936
Available-for-Sale More than One Year, Number of Securities | Security 1 36
Available-for-Sale, Gross Unrealized Loss $ (15) $ (432)
Available-for-Sale, Estimated Fair Value $ 1,600 $ 81,355
Available-for-Sale, Number of Securities | Security 2 50
Debt securities    
Summary of Investment Holdings [Line Items]    
Available-for-Sale Within One Year, Gross Unrealized Loss   $ (20)
Available-for-Sale Within One Year, Estimated Fair Value   $ 8,235
Available-for-Sale Within One Year, Number of Securities | Security   2
Available-for-Sale More than One Year, Gross Unrealized Loss   $ (3)
Available-for-Sale More than One Year, Estimated Fair Value   $ 2,997
Available-for-Sale More than One Year, Number of Securities | Security   1
Available-for-Sale, Gross Unrealized Loss   $ (22)
Available-for-Sale, Estimated Fair Value   $ 11,233
Available-for-Sale, Number of Securities | Security   3
Total U.S. government agency and sponsored agency obligations    
Summary of Investment Holdings [Line Items]    
Available-for-Sale Within One Year, Gross Unrealized Loss $ (30) $ (318)
Available-for-Sale Within One Year, Estimated Fair Value $ 12,876 $ 100,916
Available-for-Sale Within One Year, Number of Securities | Security 4 33
Available-for-Sale More than One Year, Gross Unrealized Loss $ (2) $ (483)
Available-for-Sale More than One Year, Estimated Fair Value $ 351 $ 61,690
Available-for-Sale More than One Year, Number of Securities | Security 2 51
Available-for-Sale, Gross Unrealized Loss $ (32) $ (801)
Available-for-Sale, Estimated Fair Value $ 13,227 $ 162,606
Available-for-Sale, Number of Securities | Security 6 84