Loans - Impaired Loan Balances By Portfolio Segment (Details) - USD ($)
$ in Thousands |
9 Months Ended |
12 Months Ended |
Sep. 30, 2016 |
Dec. 31, 2015 |
| Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, recorded investment |
$ 2,914
|
$ 1,724
|
| Impaired loan, with related allowance, recorded investment |
2,166
|
2,983
|
| Impaired loan, total, recorded investment |
5,080
|
4,707
|
| Unpaid Principal Balance [Abstract] |
|
|
| Impaired loan, with no related allowance, unpaid principal balance |
3,118
|
1,725
|
| Impaired loan, with related allowance, unpaid principal balance |
2,169
|
3,026
|
| Impaired loan, total, unpaid principal balance |
5,287
|
4,751
|
| Impaired loan, total, related allowance |
22
|
35
|
| Average Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, average recorded investment |
1,927
|
2,216
|
| Impaired loan, with related allowance, average recorded investment |
2,693
|
2,387
|
| Impaired loan, total, average recorded investment |
4,620
|
4,603
|
| Interest Income Recognized [Abstract] |
|
|
| Impaired loan, with no related allowance, interest income recognized |
127
|
1
|
| Impaired loan, with related allowance, interest income recognized |
36
|
65
|
| Impaired loan, total, interest income recognized |
163
|
66
|
| Commercial [Member] |
|
|
| Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, recorded investment |
25
|
4
|
| Impaired loan, with related allowance, recorded investment |
67
|
91
|
| Impaired loan, total, recorded investment |
92
|
95
|
| Unpaid Principal Balance [Abstract] |
|
|
| Impaired loan, with no related allowance, unpaid principal balance |
25
|
4
|
| Impaired loan, with related allowance, unpaid principal balance |
67
|
91
|
| Impaired loan, total, unpaid principal balance |
92
|
95
|
| Impaired loan, total, related allowance |
0
|
0
|
| Average Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, average recorded investment |
9
|
47
|
| Impaired loan, with related allowance, average recorded investment |
93
|
99
|
| Impaired loan, total, average recorded investment |
102
|
146
|
| Interest Income Recognized [Abstract] |
|
|
| Impaired loan, with no related allowance, interest income recognized |
1
|
0
|
| Impaired loan, with related allowance, interest income recognized |
1
|
0
|
| Impaired loan, total, interest income recognized |
2
|
0
|
| Commercial real estate [Member] | Construction and land development [Member] |
|
|
| Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, recorded investment |
238
|
205
|
| Impaired loan, with related allowance, recorded investment |
65
|
448
|
| Impaired loan, total, recorded investment |
303
|
653
|
| Unpaid Principal Balance [Abstract] |
|
|
| Impaired loan, with no related allowance, unpaid principal balance |
238
|
205
|
| Impaired loan, with related allowance, unpaid principal balance |
66
|
449
|
| Impaired loan, total, unpaid principal balance |
304
|
654
|
| Impaired loan, total, related allowance |
0
|
6
|
| Average Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, average recorded investment |
238
|
220
|
| Impaired loan, with related allowance, average recorded investment |
324
|
563
|
| Impaired loan, total, average recorded investment |
562
|
783
|
| Interest Income Recognized [Abstract] |
|
|
| Impaired loan, with no related allowance, interest income recognized |
13
|
0
|
| Impaired loan, with related allowance, interest income recognized |
10
|
26
|
| Impaired loan, total, interest income recognized |
23
|
26
|
| Commercial real estate [Member] | Real estate [Member] |
|
|
| Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, recorded investment |
1,837
|
1,202
|
| Impaired loan, with related allowance, recorded investment |
146
|
390
|
| Impaired loan, total, recorded investment |
1,983
|
1,592
|
| Unpaid Principal Balance [Abstract] |
|
|
| Impaired loan, with no related allowance, unpaid principal balance |
1,838
|
1,206
|
| Impaired loan, with related allowance, unpaid principal balance |
145
|
391
|
| Impaired loan, total, unpaid principal balance |
1,983
|
1,597
|
| Impaired loan, total, related allowance |
0
|
3
|
| Average Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, average recorded investment |
1,282
|
1,504
|
| Impaired loan, with related allowance, average recorded investment |
346
|
353
|
| Impaired loan, total, average recorded investment |
1,628
|
1,857
|
| Interest Income Recognized [Abstract] |
|
|
| Impaired loan, with no related allowance, interest income recognized |
76
|
1
|
| Impaired loan, with related allowance, interest income recognized |
7
|
17
|
| Impaired loan, total, interest income recognized |
83
|
18
|
| Residential [Member] | Real estate [Member] |
|
|
| Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, recorded investment |
395
|
127
|
| Impaired loan, with related allowance, recorded investment |
1,563
|
1,649
|
| Impaired loan, total, recorded investment |
1,958
|
1,776
|
| Unpaid Principal Balance [Abstract] |
|
|
| Impaired loan, with no related allowance, unpaid principal balance |
405
|
124
|
| Impaired loan, with related allowance, unpaid principal balance |
1,565
|
1,690
|
| Impaired loan, total, unpaid principal balance |
1,970
|
1,814
|
| Impaired loan, total, related allowance |
21
|
0
|
| Average Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, average recorded investment |
198
|
126
|
| Impaired loan, with related allowance, average recorded investment |
1,582
|
1,034
|
| Impaired loan, total, average recorded investment |
1,780
|
1,160
|
| Interest Income Recognized [Abstract] |
|
|
| Impaired loan, with no related allowance, interest income recognized |
20
|
0
|
| Impaired loan, with related allowance, interest income recognized |
16
|
22
|
| Impaired loan, total, interest income recognized |
36
|
22
|
| Residential [Member] | Home equity [Member] |
|
|
| Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, recorded investment |
409
|
173
|
| Impaired loan, with related allowance, recorded investment |
316
|
397
|
| Impaired loan, total, recorded investment |
725
|
570
|
| Unpaid Principal Balance [Abstract] |
|
|
| Impaired loan, with no related allowance, unpaid principal balance |
602
|
173
|
| Impaired loan, with related allowance, unpaid principal balance |
317
|
396
|
| Impaired loan, total, unpaid principal balance |
919
|
569
|
| Impaired loan, total, related allowance |
1
|
25
|
| Average Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, average recorded investment |
189
|
305
|
| Impaired loan, with related allowance, average recorded investment |
335
|
327
|
| Impaired loan, total, average recorded investment |
524
|
632
|
| Interest Income Recognized [Abstract] |
|
|
| Impaired loan, with no related allowance, interest income recognized |
16
|
0
|
| Impaired loan, with related allowance, interest income recognized |
2
|
0
|
| Impaired loan, total, interest income recognized |
18
|
0
|
| Consumer [Member] |
|
|
| Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, recorded investment |
10
|
13
|
| Impaired loan, with related allowance, recorded investment |
9
|
8
|
| Impaired loan, total, recorded investment |
19
|
21
|
| Unpaid Principal Balance [Abstract] |
|
|
| Impaired loan, with no related allowance, unpaid principal balance |
10
|
13
|
| Impaired loan, with related allowance, unpaid principal balance |
9
|
9
|
| Impaired loan, total, unpaid principal balance |
19
|
22
|
| Impaired loan, total, related allowance |
0
|
1
|
| Average Recorded Investment [Abstract] |
|
|
| Impaired loan, with no related allowance, average recorded investment |
11
|
14
|
| Impaired loan, with related allowance, average recorded investment |
13
|
11
|
| Impaired loan, total, average recorded investment |
24
|
25
|
| Interest Income Recognized [Abstract] |
|
|
| Impaired loan, with no related allowance, interest income recognized |
1
|
0
|
| Impaired loan, with related allowance, interest income recognized |
0
|
0
|
| Impaired loan, total, interest income recognized |
$ 1
|
$ 0
|