Allowance for loan losses (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
$ 3,562
|
$ 5,729
|
$ 7,239
|
| Provision for (Recovery of) Loan Losses |
0
|
(2,000)
|
100
|
| Charge-offs |
(544)
|
(816)
|
(2,381)
|
| Recoveries |
355
|
649
|
771
|
| Ending balance |
3,373
|
3,562
|
5,729
|
| Residential [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
30
|
34
|
135
|
| Provision for (Recovery of) Loan Losses |
10
|
(6)
|
(103)
|
| Charge-offs |
0
|
0
|
0
|
| Recoveries |
1
|
2
|
2
|
| Ending balance |
41
|
30
|
34
|
| Commercial [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
291
|
202
|
1,274
|
| Provision for (Recovery of) Loan Losses |
9
|
292
|
(1,016)
|
| Charge-offs |
(10)
|
(252)
|
(100)
|
| Recoveries |
10
|
49
|
44
|
| Ending balance |
300
|
291
|
202
|
| Commercial Real Estate [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
1,695
|
2,651
|
2,226
|
| Provision for (Recovery of) Loan Losses |
(730)
|
(866)
|
1,645
|
| Charge-offs |
(67)
|
(127)
|
(1,245)
|
| Recoveries |
178
|
37
|
25
|
| Ending balance |
1,076
|
1,695
|
2,651
|
| Home equity lines [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
448
|
469
|
424
|
| Provision for (Recovery of) Loan Losses |
(127)
|
36
|
506
|
| Charge-offs |
(53)
|
(62)
|
(476)
|
| Recoveries |
3
|
5
|
15
|
| Ending balance |
271
|
448
|
469
|
| Construction and Land Development [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
321
|
236
|
1,409
|
| Provision for (Recovery of) Loan Losses |
19
|
286
|
(1,119)
|
| Charge-offs |
(10)
|
(252)
|
(100)
|
| Recoveries |
11
|
51
|
46
|
| Ending balance |
341
|
321
|
236
|
| Owner Occupied [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
1,167
|
1,837
|
1,200
|
| Provision for (Recovery of) Loan Losses |
(490)
|
(576)
|
1,268
|
| Charge-offs |
(66)
|
(127)
|
(631)
|
| Recoveries |
0
|
33
|
0
|
| Ending balance |
611
|
1,167
|
1,837
|
| Non-Owner Occupied [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
460
|
607
|
670
|
| Provision for (Recovery of) Loan Losses |
(106)
|
(151)
|
430
|
| Charge-offs |
(1)
|
0
|
(518)
|
| Recoveries |
53
|
4
|
25
|
| Ending balance |
406
|
460
|
607
|
| Multifamily [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
51
|
77
|
19
|
| Provision for (Recovery of) Loan Losses |
5
|
(26)
|
58
|
| Charge-offs |
0
|
0
|
0
|
| Recoveries |
0
|
0
|
0
|
| Ending balance |
56
|
51
|
77
|
| Farmland [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
17
|
130
|
337
|
| Provision for (Recovery of) Loan Losses |
(139)
|
(113)
|
(111)
|
| Charge-offs |
0
|
0
|
(96)
|
| Recoveries |
125
|
0
|
0
|
| Ending balance |
3
|
17
|
130
|
| First Deed of Trust [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
602
|
1,345
|
1,992
|
| Provision for (Recovery of) Loan Losses |
(40)
|
(1,020)
|
(442)
|
| Charge-offs |
(140)
|
(103)
|
(277)
|
| Recoveries |
25
|
380
|
72
|
| Ending balance |
447
|
602
|
1,345
|
| Second Deed of Trust [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
111
|
275
|
394
|
| Provision for (Recovery of) Loan Losses |
21
|
(159)
|
(223)
|
| Charge-offs |
(25)
|
(55)
|
(86)
|
| Recoveries |
29
|
50
|
190
|
| Ending balance |
136
|
111
|
275
|
| Consumer Real Estate [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
1,161
|
2,089
|
2,810
|
| Provision for (Recovery of) Loan Losses |
(146)
|
(1,143)
|
(159)
|
| Charge-offs |
(218)
|
(220)
|
(839)
|
| Recoveries |
57
|
435
|
277
|
| Ending balance |
854
|
1,161
|
2,089
|
| Commercial and industrial loans (except those secured by real estate) [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
94
|
506
|
724
|
| Provision for (Recovery of) Loan Losses |
44
|
(350)
|
(447)
|
| Charge-offs |
(15)
|
(162)
|
(172)
|
| Recoveries |
100
|
100
|
401
|
| Ending balance |
223
|
94
|
506
|
| Guaranteed student loans [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
230
|
217
|
0
|
| Provision for (Recovery of) Loan Losses |
149
|
13
|
217
|
| Charge-offs |
(221)
|
0
|
0
|
| Recoveries |
0
|
0
|
0
|
| Ending balance |
158
|
230
|
217
|
| Consumer And Other [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
2
|
30
|
70
|
| Provision for (Recovery of) Loan Losses |
10
|
1
|
(37)
|
| Charge-offs |
(13)
|
(55)
|
(25)
|
| Recoveries |
9
|
26
|
22
|
| Ending balance |
8
|
2
|
30
|
| Unallocated [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
59
|
0
|
|
| Provision for (Recovery of) Loan Losses |
654
|
59
|
|
| Charge-offs |
0
|
0
|
|
| Recoveries |
0
|
0
|
|
| Ending balance |
$ 713
|
$ 59
|
$ 0
|