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Note 4 - Marketable Securities (Details) - Marketable Securities (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Note 4 - Marketable Securities (Details) - Marketable Securities [Line Items]    
Adjusted cost $ 99,440 $ 92,199
Unrealized Gains 13,612 12,910
Unrealized Losses (2,782) (838)
Fair Value 110,270 104,271
Equity Securities [Member]
   
Note 4 - Marketable Securities (Details) - Marketable Securities [Line Items]    
Adjusted cost 58,635 51,711
Unrealized Gains 11,073 11,597
Unrealized Losses (2,745) (278)
Fair Value 66,963 63,030
Preferred Stock [Member]
   
Note 4 - Marketable Securities (Details) - Marketable Securities [Line Items]    
Adjusted cost 18,756 18,519
Unrealized Gains 1,613 893
Unrealized Losses (25) (299)
Fair Value 20,344 19,113
Trust Preferred Securities [Member]
   
Note 4 - Marketable Securities (Details) - Marketable Securities [Line Items]    
Adjusted cost 20,240 19,726
Unrealized Gains 803 386
Unrealized Losses (12) (235)
Fair Value 21,031 19,877
Debt Securities [Member]
   
Note 4 - Marketable Securities (Details) - Marketable Securities [Line Items]    
Adjusted cost 1,809 2,243
Unrealized Gains 123 34
Unrealized Losses   (26)
Fair Value $ 1,932 $ 2,251