Note 5 - Non-Operating Income (Details) - Non-operating Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 5 - Non-Operating Income (Details) - Non-operating Income [Line Items]
Non-operating Income	$ 30,095	$ 25,245	$ 20,533
Equity in Earnings of Unconsolidated Investments [Member]
Note 5 - Non-Operating Income (Details) - Non-operating Income [Line Items]
Non-operating Income	14,188	13,616	9,674
Dividends and Other Net Realized Gains and Losses on Sales of Securities [Member]
Note 5 - Non-Operating Income (Details) - Non-operating Income [Line Items]
Non-operating Income	5,216	7,006	5,875
Interest Income [Member]
Note 5 - Non-Operating Income (Details) - Non-operating Income [Line Items]
Non-operating Income	5,237	4,623	4,984
Gain On Recovery Of Notes Receivable [Member]
Note 5 - Non-Operating Income (Details) - Non-operating Income [Line Items]
Non-operating Income	$ 5,454