Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Significant Unobservable Inputs Used in Recurring and Non-Recurring Fair Value Measurements (Details)

v3.8.0.1
Fair Value Measurements - Significant Unobservable Inputs Used in Recurring and Non-Recurring Fair Value Measurements (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Non-recurring:        
Other real estate owned $ 268 $ 21    
SBA servicing asset 3,512 3,411 $ 3,288 $ 3,132
Level 3        
Non-recurring:        
SBA servicing asset 3,512 3,411    
Level 3 | Fair Value Measurements on Non-Recurring Basis        
Non-recurring:        
Impaired loans 2,791 2,553    
Other real estate owned $ 268 $ 21    
Level 3 | Fair Value Measurements on Non-Recurring Basis | Weighted Average | Collateral Discounts        
Non-recurring:        
Range/Weighted Average 4.90% 11.60%    
Level 3 | Fair Value Measurements on Non-Recurring Basis | Weighted Average | Collateral Discounts and Estimated Cost to Sell        
Non-recurring:        
Range/Weighted Average 10.00% 10.00%    
Level 3 | Fair Value Measurements on Non-Recurring Basis | Weighted Average | Conditional Prepayment Rate        
Non-recurring:        
Range/Weighted Average 7.00% 6.70%    
Level 3 | Fair Value Measurements on Non-Recurring Basis | Weighted Average | Discount Rate        
Non-recurring:        
Range/Weighted Average 14.10% 14.10%    
Level 3 | Fair Value Measurements on Non-Recurring Basis | Minimum | Collateral Discounts        
Non-recurring:        
Range/Weighted Average 0.00% 0.00%    
Level 3 | Fair Value Measurements on Non-Recurring Basis | Maximum | Collateral Discounts        
Non-recurring:        
Range/Weighted Average 100.00% 100.00%    
Level 3 | Fair Value Measurements on Non-Recurring Basis | Third Party Appraisals        
Non-recurring:        
Impaired loans $ 2,791 $ 2,553    
Other real estate owned 268 21    
Level 3 | Fair Value Measurements on Non-Recurring Basis | Discounted Cash Flows        
Non-recurring:        
SBA servicing asset $ 3,512 $ 3,411