Note 5 - Loans - Summary of Impaired Loans (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
12 Months Ended |
Sep. 30, 2017 |
Sep. 30, 2017 |
Dec. 31, 2016 |
| Recorded investment, with no allowance |
$ 9,604
|
$ 9,604
|
$ 7,398
|
| Unpaid principal balance, with no allowance |
9,775
|
9,775
|
8,427
|
| Average recorded investment, with no allowance |
9,898
|
10,187
|
7,907
|
| Interest income recognized in period, with no allowance |
123
|
380
|
395
|
| Recorded investment, with an allowance |
40,006
|
40,006
|
38,191
|
| Unpaid principal balance, with an allowance |
42,541
|
42,541
|
43,000
|
| Related allowance |
8,496
|
8,496
|
8,152
|
| Average recorded investment, with an allowance |
41,019
|
41,792
|
37,779
|
| Interest income (reversal) recognized in period, with an allowance |
352
|
|
|
| Interest income recognized in period, with an allowance |
|
1,138
|
1,611
|
| Recorded investment |
49,610
|
49,610
|
45,589
|
| Unpaid principal balance |
52,316
|
52,316
|
51,427
|
| Average recorded investment |
50,917
|
51,979
|
45,686
|
| Interest income recognized in period |
475
|
1,518
|
2,006
|
| Commercial Real Estate Portfolio Segment [Member] |
|
|
|
| Recorded investment, with no allowance |
4,671
|
4,671
|
1,003
|
| Unpaid principal balance, with no allowance |
4,671
|
4,671
|
1,003
|
| Average recorded investment, with no allowance |
4,770
|
4,998
|
992
|
| Interest income recognized in period, with no allowance |
52
|
164
|
64
|
| Recorded investment, with an allowance |
25,734
|
25,734
|
26,919
|
| Unpaid principal balance, with an allowance |
27,719
|
27,719
|
31,728
|
| Related allowance |
5,725
|
5,725
|
6,607
|
| Average recorded investment, with an allowance |
26,129
|
27,021
|
26,955
|
| Interest income (reversal) recognized in period, with an allowance |
256
|
|
|
| Interest income recognized in period, with an allowance |
|
800
|
1,162
|
| Recorded investment |
30,405
|
30,405
|
27,922
|
| Unpaid principal balance |
32,390
|
32,390
|
32,731
|
| Average recorded investment |
30,899
|
32,019
|
27,947
|
| Interest income recognized in period |
308
|
964
|
1,226
|
| Real Estate Portfolio Segment[Member] |
|
|
|
| Recorded investment, with no allowance |
4,850
|
4,850
|
5,454
|
| Unpaid principal balance, with no allowance |
5,016
|
5,016
|
5,617
|
| Average recorded investment, with no allowance |
5,039
|
5,098
|
5,750
|
| Interest income recognized in period, with no allowance |
69
|
212
|
328
|
| Recorded investment, with an allowance |
10,939
|
10,939
|
7,896
|
| Unpaid principal balance, with an allowance |
11,489
|
11,489
|
7,896
|
| Related allowance |
1,892
|
1,892
|
622
|
| Average recorded investment, with an allowance |
11,483
|
11,363
|
7,247
|
| Interest income (reversal) recognized in period, with an allowance |
81
|
|
|
| Interest income recognized in period, with an allowance |
|
294
|
381
|
| Recorded investment |
15,789
|
15,789
|
13,350
|
| Unpaid principal balance |
16,505
|
16,505
|
13,513
|
| Average recorded investment |
16,522
|
16,461
|
12,997
|
| Interest income recognized in period |
150
|
506
|
709
|
| Real Estate Portfolio Segment[Member] | Construction Loans [Member] |
|
|
|
| Recorded investment, with no allowance |
45
|
45
|
938
|
| Unpaid principal balance, with no allowance |
48
|
48
|
1,802
|
| Average recorded investment, with no allowance |
48
|
49
|
1,159
|
| Interest income recognized in period, with no allowance |
1
|
2
|
3
|
| Recorded investment, with an allowance |
3,283
|
3,283
|
3,376
|
| Unpaid principal balance, with an allowance |
3,283
|
3,283
|
3,376
|
| Related allowance |
829
|
829
|
923
|
| Average recorded investment, with an allowance |
3,357
|
3,369
|
3,577
|
| Interest income (reversal) recognized in period, with an allowance |
14
|
|
|
| Interest income recognized in period, with an allowance |
|
42
|
68
|
| Recorded investment |
3,328
|
3,328
|
4,314
|
| Unpaid principal balance |
3,331
|
3,331
|
5,178
|
| Average recorded investment |
3,405
|
3,418
|
4,736
|
| Interest income recognized in period |
15
|
44
|
71
|
| Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] |
|
|
|
| Recorded investment, with no allowance |
2,366
|
2,366
|
2,615
|
| Unpaid principal balance, with no allowance |
2,532
|
2,532
|
2,778
|
| Average recorded investment, with no allowance |
2,551
|
2,584
|
2,884
|
| Interest income recognized in period, with no allowance |
37
|
113
|
166
|
| Recorded investment, with an allowance |
8,024
|
8,024
|
6,924
|
| Unpaid principal balance, with an allowance |
8,024
|
8,024
|
6,924
|
| Related allowance |
1,512
|
1,512
|
348
|
| Average recorded investment, with an allowance |
8,024
|
7,873
|
6,934
|
| Interest income (reversal) recognized in period, with an allowance |
75
|
|
|
| Interest income recognized in period, with an allowance |
|
217
|
362
|
| Recorded investment |
10,390
|
10,390
|
9,539
|
| Unpaid principal balance |
10,556
|
10,556
|
9,702
|
| Average recorded investment |
10,575
|
10,457
|
9,818
|
| Interest income recognized in period |
112
|
330
|
528
|
| Real Estate Portfolio Segment[Member] | One to Four Family [Member] |
|
|
|
| Recorded investment, with no allowance |
1,752
|
1,752
|
1,899
|
| Unpaid principal balance, with no allowance |
1,752
|
1,752
|
1,899
|
| Average recorded investment, with no allowance |
1,756
|
1,781
|
1,901
|
| Interest income recognized in period, with no allowance |
22
|
67
|
102
|
| Recorded investment, with an allowance |
2,485
|
2,485
|
972
|
| Unpaid principal balance, with an allowance |
2,485
|
2,485
|
972
|
| Related allowance |
328
|
328
|
274
|
| Average recorded investment, with an allowance |
2,485
|
2,506
|
313
|
| Interest income (reversal) recognized in period, with an allowance |
10
|
|
|
| Interest income recognized in period, with an allowance |
|
56
|
19
|
| Recorded investment |
4,237
|
4,237
|
2,871
|
| Unpaid principal balance |
4,237
|
4,237
|
2,871
|
| Average recorded investment |
4,241
|
4,287
|
2,214
|
| Interest income recognized in period |
32
|
123
|
121
|
| Real Estate Portfolio Segment[Member] | Other Mortgages [Member] |
|
|
|
| Recorded investment, with no allowance |
732
|
732
|
940
|
| Unpaid principal balance, with no allowance |
732
|
732
|
940
|
| Average recorded investment, with no allowance |
732
|
733
|
965
|
| Interest income recognized in period, with no allowance |
10
|
32
|
60
|
| Recorded investment, with an allowance |
430
|
430
|
|
| Unpaid principal balance, with an allowance |
980
|
980
|
|
| Related allowance |
52
|
52
|
|
| Average recorded investment, with an allowance |
974
|
984
|
|
| Interest income (reversal) recognized in period, with an allowance |
(4)
|
|
|
| Interest income recognized in period, with an allowance |
|
21
|
|
| Recorded investment |
1,162
|
1,162
|
940
|
| Unpaid principal balance |
1,712
|
1,712
|
940
|
| Average recorded investment |
1,706
|
1,717
|
965
|
| Interest income recognized in period |
6
|
53
|
60
|
| Consumer Portfolio Segment [Member] |
|
|
|
| Recorded investment, with no allowance |
38
|
38
|
3
|
| Unpaid principal balance, with no allowance |
40
|
40
|
5
|
| Average recorded investment, with no allowance |
41
|
42
|
6
|
| Interest income recognized in period, with no allowance |
1
|
2
|
|
| Recorded investment, with an allowance |
50
|
50
|
|
| Unpaid principal balance, with an allowance |
50
|
50
|
|
| Related allowance |
50
|
50
|
|
| Average recorded investment, with an allowance |
50
|
39
|
|
| Interest income (reversal) recognized in period, with an allowance |
1
|
|
|
| Interest income recognized in period, with an allowance |
|
2
|
|
| Recorded investment |
88
|
88
|
3
|
| Unpaid principal balance |
90
|
90
|
5
|
| Average recorded investment |
91
|
81
|
6
|
| Interest income recognized in period |
$ 2
|
$ 4
|
|