v3.19.1
Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-recurring Basis (Details) - Nonrecurring - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Impaired loans:    
Impaired loans $ 51  
Total assets measured at fair value on a recurring basis 51 $ 0
Total liabilities measured at fair value on a recurring basis 0 0
SBA loan pool securities    
Impaired loans:    
Impaired loans 51  
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Impaired loans:    
Impaired loans 0  
Total assets measured at fair value on a recurring basis 0 0
Total liabilities measured at fair value on a recurring basis 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | SBA loan pool securities    
Impaired loans:    
Impaired loans 0  
Significant Other Observable Inputs (Level 2)    
Impaired loans:    
Impaired loans 0  
Total assets measured at fair value on a recurring basis 0 0
Total liabilities measured at fair value on a recurring basis 0 0
Significant Other Observable Inputs (Level 2) | SBA loan pool securities    
Impaired loans:    
Impaired loans 0  
Significant Unobservable Inputs (Level 3)    
Impaired loans:    
Impaired loans 51  
Total assets measured at fair value on a recurring basis 51 0
Total liabilities measured at fair value on a recurring basis 0 $ 0
Significant Unobservable Inputs (Level 3) | SBA loan pool securities    
Impaired loans:    
Impaired loans $ 51