Loans - Recorded investment in past due loans and leases (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | $ 7,523 | $ 10,018 |
Current | 421,772 | 404,412 |
Total loans | 429,295 | 414,430 |
Recorded Investment, 90 Days and Accruing | 2,567 | 5,573 |
Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 3,647 | 2,718 |
Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 1,309 | 1,727 |
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 2,567 | 5,573 |
Construction And Land Development [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 118 |
Current | 31,950 | 41,490 |
Total loans | 31,950 | 41,608 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Construction And Land Development [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 118 |
Construction And Land Development [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Construction And Land Development [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Residential [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Current | 7,887 | 7,704 |
Total loans | 7,887 | 7,704 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Residential [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Residential [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Residential [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Commercial [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 118 |
Current | 24,063 | 33,786 |
Total loans | 24,063 | 33,904 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Commercial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 118 |
Commercial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Commercial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Commercial Real Estate [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 701 | 0 |
Current | 227,648 | 206,969 |
Total loans | 228,349 | 206,969 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Commercial Real Estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 701 | 0 |
Commercial Real Estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Commercial Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Owner Occupied [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 701 | 0 |
Current | 97,652 | 98,153 |
Total loans | 98,353 | 98,153 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Owner Occupied [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 701 | 0 |
Owner Occupied [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Owner Occupied [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Non-Owner Occupied [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Current | 116,508 | 95,034 |
Total loans | 116,508 | 95,034 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Non-Owner Occupied [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Non-Owner Occupied [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Non-Owner Occupied [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Multifamily [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Current | 13,332 | 13,597 |
Total loans | 13,332 | 13,597 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Multifamily [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Multifamily [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Multifamily [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Farmland [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Current | 156 | 185 |
Total loans | 156 | 185 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Farmland [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Farmland [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Farmland [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Consumer Real Estate [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 475 | 655 |
Current | 87,301 | 86,986 |
Total loans | 87,776 | 87,641 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Consumer Real Estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 475 | 333 |
Consumer Real Estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 322 |
Consumer Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Home equity lines [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 52 | 315 |
Current | 21,457 | 20,360 |
Total loans | 21,509 | 20,675 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Home equity lines [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 52 | 0 |
Home equity lines [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 315 |
Home equity lines [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
First Deed of Trust [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 290 | 178 |
Current | 55,566 | 57,232 |
Total loans | 55,856 | 57,410 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
First Deed of Trust [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 290 | 171 |
First Deed of Trust [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 7 |
First Deed of Trust [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Second Deed of Trust [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 133 | 162 |
Current | 10,278 | 9,394 |
Total loans | 10,411 | 9,556 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Second Deed of Trust [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 133 | 162 |
Second Deed of Trust [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Second Deed of Trust [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Commercial and industrial loans (except those secured by real estate) | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 773 | 745 |
Current | 44,301 | 35,894 |
Total loans | 45,074 | 36,639 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Commercial and industrial loans (except those secured by real estate) | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 773 | 312 |
Commercial and industrial loans (except those secured by real estate) | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 433 |
Commercial and industrial loans (except those secured by real estate) | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 0 |
Guaranteed student loans [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 5,570 | 8,490 |
Current | 27,955 | 30,825 |
Total loans | 33,525 | 39,315 |
Recorded Investment, 90 Days and Accruing | 2,567 | 5,573 |
Guaranteed student loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 1,694 | 1,946 |
Guaranteed student loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 1,309 | 971 |
Guaranteed student loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 2,567 | 5,573 |
Consumer And Other [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 4 | 10 |
Current | 2,617 | 2,248 |
Total loans | 2,621 | 2,258 |
Recorded Investment, 90 Days and Accruing | 0 | 0 |
Consumer And Other [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 4 | 9 |
Consumer And Other [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | 0 | 1 |
Consumer And Other [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Financing Receivable, Recorded Investment, Past Due | $ 0 | $ 0 |