Note 16 - Stockholders' Equity (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,549,565,000		$ 1,629,504,000
Increase (Decrease) in Retained Earnings	(79,900,000)
Percentage Change in Retained Earnings	4.90%
Net Income (Loss) Attributable to Parent	28,847,000	28,913,000
Other Comprehensive Income (Loss), Net of Tax	23,012,000	4,195,000
Preferred Stock Redemption Premium	1,300,000
Series B Preferred Stock [Member]
Stock Redeemed or Called During Period, Value	129,000,000
Percent of Preferred Stock Redeemed	50.00%
Approximation [Member]
Net Income (Loss) Attributable to Parent	$ 29,000,000