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Note 4 - Marketable Securities (Details) - Marketable Securities (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Note 4 - Marketable Securities (Details) - Marketable Securities [Line Items]    
Adjusted cost $ 80,401 $ 92,199
Unrealized Gains 15,085 12,910
Unrealized Losses (178) (838)
Fair Value 95,308 104,271
Equity Securities [Member]
    
Note 4 - Marketable Securities (Details) - Marketable Securities [Line Items]    
Adjusted cost 41,165 51,711
Unrealized Gains 12,218 11,597
Unrealized Losses (178) (278)
Fair Value 53,205 63,030
Preferred Stock [Member]
    
Note 4 - Marketable Securities (Details) - Marketable Securities [Line Items]    
Adjusted cost 18,596 18,519
Unrealized Gains 1,421 893
Unrealized Losses   (299)
Fair Value 20,017 19,113
Trust Preferred Securities [Member]
    
Note 4 - Marketable Securities (Details) - Marketable Securities [Line Items]    
Adjusted cost 18,253 19,726
Unrealized Gains 1,285 386
Unrealized Losses   (235)
Fair Value 19,538 19,877
Debt Securities [Member]
    
Note 4 - Marketable Securities (Details) - Marketable Securities [Line Items]    
Adjusted cost 2,387 2,243
Unrealized Gains 161 34
Unrealized Losses   (26)
Fair Value $ 2,548 $ 2,251