Note 4 - Securities - Amortized Cost, Gross Unrealized Gains and Losses, and the Fair Value of the Company's Securities (Details) - USD ($)
$ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Available-for-sale: |
|
|
| Amortized Cost |
$ 275,379
|
$ 254,134
|
| Gross Unrealized Holding Gains |
805
|
982
|
| Gross Unrealized Holding Losses |
3,508
|
1,343
|
| Securities available for sale, at fair value |
272,676
|
253,773
|
| US Government Agencies Debt Securities [Member] |
|
|
| Available-for-sale: |
|
|
| Amortized Cost |
12,152
|
43,787
|
| Gross Unrealized Holding Gains |
36
|
256
|
| Gross Unrealized Holding Losses |
0
|
0
|
| Securities available for sale, at fair value |
12,188
|
44,043
|
| US States and Political Subdivisions Debt Securities [Member] |
|
|
| Available-for-sale: |
|
|
| Amortized Cost |
119,919
|
75,401
|
| Gross Unrealized Holding Gains |
257
|
428
|
| Gross Unrealized Holding Losses |
2,303
|
422
|
| Securities available for sale, at fair value |
117,873
|
75,407
|
| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Residential Mortgage [Member] |
|
|
| Available-for-sale: |
|
|
| Amortized Cost |
17,969
|
22,162
|
| Gross Unrealized Holding Gains |
155
|
116
|
| Gross Unrealized Holding Losses |
40
|
9
|
| Securities available for sale, at fair value |
18,084
|
22,269
|
| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Commercial Loan [Member] |
|
|
| Available-for-sale: |
|
|
| Amortized Cost |
100,064
|
89,900
|
| Gross Unrealized Holding Gains |
154
|
124
|
| Gross Unrealized Holding Losses |
868
|
601
|
| Securities available for sale, at fair value |
99,350
|
89,423
|
| Collateralized Mortgage Backed Securities [Member] |
|
|
| Available-for-sale: |
|
|
| Amortized Cost |
20,593
|
18,201
|
| Gross Unrealized Holding Gains |
159
|
58
|
| Gross Unrealized Holding Losses |
176
|
161
|
| Securities available for sale, at fair value |
20,576
|
18,098
|
| Corporate Debt Securities [Member] |
|
|
| Available-for-sale: |
|
|
| Amortized Cost |
500
|
500
|
| Gross Unrealized Holding Gains |
0
|
0
|
| Gross Unrealized Holding Losses |
47
|
77
|
| Securities available for sale, at fair value |
453
|
423
|
| Negotiable Certificates of Deposit [Member] |
|
|
| Available-for-sale: |
|
|
| Amortized Cost |
3,172
|
3,173
|
| Gross Unrealized Holding Gains |
44
|
0
|
| Gross Unrealized Holding Losses |
0
|
11
|
| Securities available for sale, at fair value |
3,216
|
3,162
|
| Equity Securities [Member] |
|
|
| Available-for-sale: |
|
|
| Amortized Cost |
1,010
|
1,010
|
| Gross Unrealized Holding Gains |
0
|
0
|
| Gross Unrealized Holding Losses |
74
|
62
|
| Securities available for sale, at fair value |
$ 936
|
$ 948
|