Note 15 - Balance Sheet Offsetting (Details) - Financial Instruments that are Eligible for Offset in the Consolidated Balance Sheet (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Financial Instruments that are Eligible for Offset in the Consolidated Balance Sheet [Abstract]
Gross Amounts of Recognized Liabilities	$ 950,000	$ 1,250,000
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	950,000	1,250,000
Financial Instruments	0	0
Collateral Posted	(950,000)	(1,250,000)
Net Amount	$ 0	$ 0