Note 13 - Stockholders' Equity and Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	2013
	Pre-tax			Tax expense			Net-of-tax
Beginning balance, net of tax							$	465
Net unrealized losses arising during the period	$	(117,515	)	$	(49,407	)	$	(68,108	)
Reclassification adjustment for net securities gains included in net income		27,362			11,503			15,859
Net unrealized gains arising from transferring securities held-to-maturity to available-for-sale		38,052			15,997			22,055
Total other comprehensive income	$	(52,101	)	$	(21,907	)	$	(30,194	)
Ending balance, net of tax							$	(29,729	)

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Year Ended December 31,
	2013							2012							2011
	Income (Numerator)			Shares (Denominator)		Per Share Amount		Income (Numerator)			Shares (Denominator)		Per Share Amount		Income (Numerator)			Shares (Denominator)		Per Share Amount
	(In thousands, except shares and per share data)
Net income	$	123,143						$	117,438						$	100,150
Dividends on preferred stock		(9,685	)						(16,488	)						(16,437	)
Basic EPS, income/(loss)	$	113,458			78,954,898	$	1.44	$	100,950			78,719,133	$	1.28	$	83,713			78,633,317	$	1.06
Effect of dilutive stock options					183,085							4,164							7,335
Diluted EPS, income/(loss)	$	113,458			79,137,983	$	1.43	$	100,950			78,723,297	$	1.28	$	83,713			78,640,652	$	1.06