Note 10 - Subsequent Events (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Apr. 30, 2014 Subsequent Event [Member] Senior Notes [Member] Senior Notes First Issuance [Member]	Mar. 31, 2014 Senior Notes [Member] Senior Notes First Issuance [Member]
Note 10 - Subsequent Events (Details) [Line Items]
Repayments of Long-term Debt	$ 150,000	$ 50,000	$ 100,000
Debt Instrument, Interest Rate, Stated Percentage			6.08%	6.08%