Note 4 - Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

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

	Three Months Ended March 31,
	2015			2014
	(Dollars in thousands, except per share amounts)
Numerator:
Net income	$	31,605		$	38,159
Less: Net income allocated to preferred shareholder		(7,662	)		(9,147	)
Less: Net income allocated to unvested restricted stock		(67	)		(59	)
Net income available to common stockholders for basic earnings per common share		23,876			28,953
Effect of dilutive securities:
Net income allocated to preferred shareholder		7,662			9,147
Interest on 1¼% convertible senior notes due 2032, included in cost of sales		41			41
Net income available to common and preferred stock for diluted earnings per share	$	31,579		$	38,141
Denominator:
Weighted average basic common shares outstanding		273,635,605			277,948,342
Weighted average additional common shares outstanding if preferred shares converted to common shares (if dilutive)		87,812,786			87,812,786
Total weighted average common shares outstanding if preferred shares converted to common shares		361,448,391			365,761,128
Effect of dilutive securities:
Share-based awards		5,443,367			6,633,777
1¼% convertible senior notes due 2032		31,312,850			31,312,850
Weighted average diluted shares outstanding		398,204,608			403,707,755
Income per common share:
Basic	$	0.09		$	0.10
Diluted	$	0.08		$	0.09