Note 16 - Stockholders' Equity (Details) (USD $)	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Note 16 - Stockholders' Equity (Details) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,539,422,000			$ 1,539,422,000		$ 1,629,504,000
Increase (Decrease) in Retained Earnings				(90,100,000)
Percentage Change in Retained Earnings				5.50%
Available-for-sale Securities, Gross Unrealized Loss		15,500,000		52,950,000		14,150,000
Net Income (Loss) Attributable to Parent	29,916,000		29,861,000	58,763,000	58,774,000
Preferred Stock Redemption Premium		1,300,000
Series B Preferred Stock [Member]
Note 16 - Stockholders' Equity (Details) [Line Items]
Stock Redeemed or Called During Period, Value		129,000,000
Percent of Preferred Stock Redeemed		50.00%
Approximation [Member]
Note 16 - Stockholders' Equity (Details) [Line Items]
Net Income (Loss) Attributable to Parent		$ 59,100,000