XML 64 R40.htm IDEA: XBRL DOCUMENT v3.20.1
Available for Sale Securities - Summary of Gross Unrealized Losses on Securities Available-for-sale and Fair Values (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Fair Value $ 25,930 $ 20,276
Unrealized Loss (478) (138)
Fair Value 12,995 17,485
Unrealized Loss (191) (258)
Fair Value 38,925 37,761
Unrealized Loss (669) (396)
US States and Political Subdivisions Debt Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 5,018 2,052
Unrealized Loss (49) (14)
Fair Value 317 667
Unrealized Loss (28) (6)
Fair Value 5,335 2,719
Unrealized Loss (77) (20)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 18,543 15,830
Unrealized Loss (322) (106)
Fair Value 12,631 16,747
Unrealized Loss (163) (251)
Fair Value 31,174 32,577
Unrealized Loss (485) (357)
Collateralized Mortgage Obligations [Member]    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 231  
Unrealized Loss (39)  
Fair Value 0  
Unrealized Loss 0  
Fair Value 231  
Unrealized Loss (39)  
Asset-backed Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 2,138 2,394
Unrealized Loss (68) (18)
Fair Value 47 71
Unrealized Loss 0 (1)
Fair Value 2,185 2,465
Unrealized Loss $ (68) $ (19)