Note 11 - Marketable Securities (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 11 - Marketable Securities (Details) [Line Items]
Proceeds from Sale and Maturity of Marketable Securities	$ 26,406,000	$ 156,000	$ 188,003,000
Available-for-sale Securities, Gross Realized Gains	12,100,000	0	800,000
Foreign Currency Transaction Gain (Loss), Realized	0	0	1,600,000
Available-for-sale Securities, Gross Realized Losses	0	0	300,000
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	2,200,000
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	800,000
Certain Marketable Securities [Member]
Note 11 - Marketable Securities (Details) [Line Items]
Proceeds from Sale and Maturity of Marketable Securities	$ 26,400,000	$ 200,000	$ 188,000,000
Additional [Member] | Minimum [Member]
Note 11 - Marketable Securities (Details) [Line Items]
Number of Years	1
Additional [Member] | Maximum [Member]
Note 11 - Marketable Securities (Details) [Line Items]
Number of Years	5
Additional 1 [Member] | Minimum [Member]
Note 11 - Marketable Securities (Details) [Line Items]
Number of Years	5
Additional 1 [Member] | Maximum [Member]
Note 11 - Marketable Securities (Details) [Line Items]
Number of Years	10