Note 5 - Loans and Leases - Recorded Investment and Principal Balance of Impaired Loans by Portfolio Segment Their Related Allowance and Interest Income Recognized (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Impaired loans with related allowance, recorded investment |
$ 737
|
$ 2,671
|
$ 5,484
|
| Impaired loans with related allowance, principal balance |
737
|
2,674
|
6,017
|
| Impaired loans, related allowance |
86
|
693
|
668
|
| Impaired loans with related allowance, average principal balance |
775
|
2,902
|
6,095
|
| Impaired loans with related allowance, interest income recognized |
34
|
77
|
162
|
| Impaired loans without related allowance, recorded investment |
13,437
|
11,715
|
8,165
|
| Impaired loans without related allowance, principal balance |
15,017
|
15,056
|
9,656
|
| Impaired loans without related allowance, average principal balance |
20,322
|
17,123
|
10,421
|
| Impaired loans without related allowance, interest income recognized |
517
|
436
|
179
|
| Impaired loans, recorded investment |
14,174
|
14,386
|
13,649
|
| Impaired loans, principal balance |
15,754
|
17,730
|
15,673
|
| Impaired loans, average principal balance |
21,097
|
20,025
|
16,516
|
| Impaired loans, interest income recognized |
551
|
513
|
341
|
| Real Estate Portfolio Segment [Member] |
|
|
|
| Impaired loans with related allowance, recorded investment |
622
|
|
|
| Impaired loans with related allowance, principal balance |
622
|
|
|
| Impaired loans, related allowance |
73
|
|
|
| Impaired loans with related allowance, average principal balance |
639
|
|
|
| Impaired loans with related allowance, interest income recognized |
27
|
|
|
| Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] |
|
|
|
| Impaired loans with related allowance, recorded investment |
|
115
|
111
|
| Impaired loans with related allowance, principal balance |
|
115
|
198
|
| Impaired loans, related allowance |
|
115
|
4
|
| Impaired loans with related allowance, average principal balance |
|
125
|
197
|
| Impaired loans with related allowance, interest income recognized |
|
4
|
|
| Impaired loans without related allowance, recorded investment |
2,354
|
1,865
|
1,044
|
| Impaired loans without related allowance, principal balance |
2,778
|
2,447
|
1,137
|
| Impaired loans without related allowance, average principal balance |
2,833
|
2,605
|
1,251
|
| Impaired loans without related allowance, interest income recognized |
25
|
46
|
12
|
| Real Estate Portfolio Segment [Member] | Residential Mortgage Loan [Member] |
|
|
|
| Impaired loans with related allowance, recorded investment |
|
515
|
3,273
|
| Impaired loans with related allowance, principal balance |
|
527
|
3,260
|
| Impaired loans, related allowance |
|
54
|
184
|
| Impaired loans with related allowance, average principal balance |
|
531
|
3,289
|
| Impaired loans with related allowance, interest income recognized |
|
23
|
112
|
| Impaired loans without related allowance, recorded investment |
6,644
|
7,239
|
5,369
|
| Impaired loans without related allowance, principal balance |
6,970
|
8,166
|
5,794
|
| Impaired loans without related allowance, average principal balance |
7,544
|
8,085
|
6,210
|
| Impaired loans without related allowance, interest income recognized |
276
|
257
|
152
|
| Real Estate Portfolio Segment [Member] | Commercial Mortgage [Member] |
|
|
|
| Impaired loans without related allowance, recorded investment |
1,577
|
349
|
97
|
| Impaired loans without related allowance, principal balance |
1,577
|
358
|
97
|
| Impaired loans without related allowance, average principal balance |
1,583
|
361
|
103
|
| Impaired loans without related allowance, interest income recognized |
70
|
9
|
4
|
| Real Estate Portfolio Segment [Member] | Construction Loans [Member] |
|
|
|
| Impaired loans without related allowance, recorded investment |
|
33
|
264
|
| Impaired loans without related allowance, principal balance |
|
996
|
1,225
|
| Impaired loans without related allowance, average principal balance |
|
1,087
|
1,427
|
| Impaired loans without related allowance, interest income recognized |
|
|
|
| Commercial Portfolio Segment [Member] |
|
|
|
| Impaired loans with related allowance, recorded investment |
84
|
2,011
|
2,069
|
| Impaired loans with related allowance, principal balance |
84
|
2,002
|
2,527
|
| Impaired loans, related allowance |
5
|
519
|
448
|
| Impaired loans with related allowance, average principal balance |
103
|
2,215
|
2,577
|
| Impaired loans with related allowance, interest income recognized |
5
|
49
|
49
|
| Impaired loans without related allowance, recorded investment |
2,862
|
2,229
|
1,391
|
| Impaired loans without related allowance, principal balance |
3,692
|
3,089
|
1,403
|
| Impaired loans without related allowance, average principal balance |
8,362
|
4,985
|
1,430
|
| Impaired loans without related allowance, interest income recognized |
146
|
124
|
11
|
| Consumer Portfolio Segment [Member] |
|
|
|
| Impaired loans with related allowance, recorded investment |
31
|
30
|
31
|
| Impaired loans with related allowance, principal balance |
31
|
30
|
32
|
| Impaired loans, related allowance |
8
|
5
|
32
|
| Impaired loans with related allowance, average principal balance |
33
|
31
|
32
|
| Impaired loans with related allowance, interest income recognized |
$ 2
|
$ 1
|
$ 1
|