Loans and allowance for loan losses (Details 7) - USD ($)
$ in Thousands |
3 Months Ended |
12 Months Ended |
Mar. 31, 2016 |
Mar. 31, 2015 |
Dec. 31, 2015 |
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
$ 3,562
|
$ 5,729
|
$ 5,729
|
| Provision for Loan and Lease Losses |
0
|
0
|
(2,000)
|
| Charge-offs |
(115)
|
(279)
|
(816)
|
| Recoveries |
164
|
394
|
649
|
| Ending balance |
3,611
|
5,844
|
3,562
|
| Residential [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
30
|
34
|
34
|
| Provision for Loan and Lease Losses |
13
|
51
|
(6)
|
| Charge-offs |
0
|
0
|
0
|
| Recoveries |
1
|
1
|
2
|
| Ending balance |
44
|
86
|
30
|
| Commercial [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
291
|
202
|
202
|
| Provision for Loan and Lease Losses |
62
|
242
|
292
|
| Charge-offs |
0
|
(115)
|
(252)
|
| Recoveries |
0
|
1
|
49
|
| Ending balance |
353
|
330
|
291
|
| Commercial Real Estate [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
1,695
|
2,651
|
2,651
|
| Provision for Loan and Lease Losses |
(379)
|
49
|
(866)
|
| Charge-offs |
0
|
0
|
(127)
|
| Recoveries |
126
|
0
|
37
|
| Ending balance |
1,442
|
2,700
|
1,695
|
| Home equity lines [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
448
|
469
|
469
|
| Provision for Loan and Lease Losses |
(57)
|
214
|
36
|
| Charge-offs |
0
|
0
|
(62)
|
| Recoveries |
1
|
0
|
5
|
| Ending balance |
392
|
683
|
448
|
| Construction and Land Development [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
321
|
236
|
236
|
| Provision for Loan and Lease Losses |
75
|
293
|
286
|
| Charge-offs |
0
|
(115)
|
(252)
|
| Recoveries |
1
|
2
|
51
|
| Ending balance |
397
|
416
|
321
|
| Owner Occupied [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
1,167
|
1,837
|
1,837
|
| Provision for Loan and Lease Losses |
(182)
|
59
|
(576)
|
| Charge-offs |
0
|
0
|
(127)
|
| Recoveries |
0
|
0
|
33
|
| Ending balance |
985
|
1,896
|
1,167
|
| Non-Owner Occupied [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
460
|
607
|
607
|
| Provision for Loan and Lease Losses |
(59)
|
76
|
(151)
|
| Charge-offs |
0
|
0
|
0
|
| Recoveries |
1
|
0
|
4
|
| Ending balance |
402
|
683
|
460
|
| Multifamily [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
51
|
77
|
77
|
| Provision for Loan and Lease Losses |
0
|
39
|
(26)
|
| Charge-offs |
0
|
0
|
0
|
| Recoveries |
0
|
0
|
0
|
| Ending balance |
51
|
116
|
51
|
| Farmland [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
17
|
130
|
130
|
| Provision for Loan and Lease Losses |
(138)
|
(125)
|
(113)
|
| Charge-offs |
0
|
0
|
0
|
| Recoveries |
125
|
0
|
0
|
| Ending balance |
4
|
5
|
17
|
| First Deed of Trust [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
602
|
1,345
|
1,345
|
| Provision for Loan and Lease Losses |
(35)
|
(429)
|
(1,020)
|
| Charge-offs |
(27)
|
0
|
(103)
|
| Recoveries |
6
|
358
|
380
|
| Ending balance |
546
|
1,274
|
602
|
| Second Deed of Trust [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
111
|
275
|
275
|
| Provision for Loan and Lease Losses |
(19)
|
(67)
|
(159)
|
| Charge-offs |
0
|
0
|
(55)
|
| Recoveries |
5
|
9
|
50
|
| Ending balance |
97
|
217
|
111
|
| Consumer Real Estate [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
1,161
|
2,089
|
2,089
|
| Provision for Loan and Lease Losses |
(111)
|
(282)
|
(1,143)
|
| Charge-offs |
(27)
|
0
|
(220)
|
| Recoveries |
12
|
367
|
435
|
| Ending balance |
1,035
|
2,174
|
1,161
|
| Commercial and industrial loans (except those secured by real estate) [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
94
|
506
|
506
|
| Provision for Loan and Lease Losses |
(23)
|
(52)
|
(350)
|
| Charge-offs |
0
|
(162)
|
(162)
|
| Recoveries |
24
|
12
|
100
|
| Ending balance |
95
|
304
|
94
|
| Guaranteed student loans [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
230
|
217
|
217
|
| Provision for Loan and Lease Losses |
63
|
0
|
13
|
| Charge-offs |
(87)
|
0
|
0
|
| Recoveries |
0
|
0
|
0
|
| Ending balance |
206
|
217
|
230
|
| Consumer And Other [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
2
|
30
|
30
|
| Provision for Loan and Lease Losses |
(2)
|
(8)
|
1
|
| Charge-offs |
(1)
|
(2)
|
(55)
|
| Recoveries |
1
|
13
|
26
|
| Ending balance |
0
|
33
|
2
|
| Unallocated [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning balance |
59
|
$ 0
|
0
|
| Provision for Loan and Lease Losses |
377
|
|
59
|
| Charge-offs |
0
|
|
0
|
| Recoveries |
0
|
|
0
|
| Ending balance |
$ 436
|
|
$ 59
|