Loans and allowance for loan losses (Details 6) $ in Thousands |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2016
USD ($)
Loans
Loan
|
Mar. 31, 2015
USD ($)
Loans
Loan
|
|
| Defaults on TDRs [Line Items] | ||
| Number of Loans | Loan | 5 | 2 |
| Recorded Balance | $ 562 | $ 527 |
| Commercial Real Estate [Member] | ||
| Defaults on TDRs [Line Items] | ||
| Number of Loans | Loan | 0 | 1 |
| Recorded Balance | $ 0 | $ 406 |
| Owner Occupied [Member] | ||
| Defaults on TDRs [Line Items] | ||
| Number of Loans | Loans | 0 | 1 |
| Recorded Balance | $ 0 | $ 406 |
| Consumer Real Estate [Member] | ||
| Defaults on TDRs [Line Items] | ||
| Number of Loans | Loan | 4 | 1 |
| Recorded Balance | $ 443 | $ 121 |
| First Deed of Trust [Member] | ||
| Defaults on TDRs [Line Items] | ||
| Number of Loans | Loans | 1 | 1 |
| Recorded Balance | $ 262 | $ 121 |
| Second Deed of Trust [Member] | ||
| Defaults on TDRs [Line Items] | ||
| Number of Loans | Loans | 3 | 0 |
| Recorded Balance | $ 181 | $ 0 |
| Commercial and industrial loans (except those secured by real estate) [Member] | ||
| Defaults on TDRs [Line Items] | ||
| Number of Loans | Loans | 1 | 0 |
| Recorded Balance | $ 119 | $ 0 |