Note 6 - Marketable Securities (Details) - Marketable Securities - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Note 6 - Marketable Securities (Details) - Marketable Securities [Line Items] |
|
|
| Adjusted cost |
$ 71,503
|
$ 80,934
|
| Unrealized gains |
4,063
|
8,317
|
| Unrealized losses |
(899)
|
(1,531)
|
| Fair value |
74,667
|
87,720
|
| Equity Securities [Member] |
|
|
| Note 6 - Marketable Securities (Details) - Marketable Securities [Line Items] |
|
|
| Adjusted cost |
10,825
|
35,062
|
| Unrealized gains |
44
|
5,214
|
| Unrealized losses |
(711)
|
(1,526)
|
| Fair value |
10,158
|
38,750
|
| Preferred Stock [Member] |
|
|
| Note 6 - Marketable Securities (Details) - Marketable Securities [Line Items] |
|
|
| Adjusted cost |
37,703
|
21,660
|
| Unrealized gains |
2,419
|
1,626
|
| Unrealized losses |
(122)
|
|
| Fair value |
40,000
|
23,286
|
| Trust Preferred Securities [Member] |
|
|
| Note 6 - Marketable Securities (Details) - Marketable Securities [Line Items] |
|
|
| Adjusted cost |
16,464
|
18,920
|
| Unrealized gains |
1,303
|
1,285
|
| Unrealized losses |
(66)
|
(1)
|
| Fair value |
17,701
|
20,204
|
| Debt Securities [Member] |
|
|
| Note 6 - Marketable Securities (Details) - Marketable Securities [Line Items] |
|
|
| Adjusted cost |
6,511
|
5,292
|
| Unrealized gains |
297
|
192
|
| Unrealized losses |
|
(4)
|
| Fair value |
$ 6,808
|
$ 5,480
|