Note 7 - Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

	Year Ended December 31,
	2012		2011		2010
	(dollars in thousands, except share and per share amounts)
Basic:
Weighted average common shares outstanding		13,852,709		13,774,628		13,671,053
Net income	$	57,957	$	64,072	$	52,695
Dividends to preferred stockholders		8,671		8,671		8,673
Net income available to common stockholders	$	49,286	$	55,401	$	44,022
Earnings per common share, basic	$	3.56	$	4.02	$	3.22
Diluted:
Weighted average common shares outstanding		13,852,709		13,774,628		13,671,053
Dilutive effect of stock options		8,019		9,934		3,237
Dilutive effect of restricted stock		5,526		6,009		2,186
Dilutive effect of contingent issuable stock		109,233		–		–
Convertible preferred stock		2,623,329		2,623,452		–
Assumed average common shares outstanding		16,598,816		16,414,023		13,676,476
Net income available to common stockholders	$	49,286	$	55,401	$	44,022
Add dilutive preferred stock dividends for effect of assumed conversion of preferred stock		8,671		8,671		–
Net income for diluted earnings per common share	$	57,957	$	64,072	$	44,022
Earnings per common share, diluted	$	3.49	$	3.90	$	3.22