Note 4 - Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
	(Dollars in thousands, except per share amounts)
Numerator:
Net income	$	57,198		$	56,463		$	88,803		$	94,622
Less: Net income allocated to preferred shareholder		(13,798	)		(13,496	)		(21,475	)		(22,650	)
Less: Net income allocated to unvested restricted stock		(112	)		(77	)		(181	)		(134	)
Net income available to common stockholders for basic earnings per common share		43,288			42,890			67,147			71,838
Effect of dilutive securities:
Net income allocated to preferred shareholder		13,798			13,496			21,475			22,650
Interest on 1¼% convertible senior notes due 2032, capitalized and amortized in cost of sales		41			41			204			204
Net income available to common and preferred stock for diluted earnings per share	$	57,127		$	56,427		$	88,826		$	94,692
Denominator:
Weighted average basic common shares outstanding		275,498,449			279,075,416			274,572,173			278,514,992
Weighted average additional common shares outstanding if preferred shares converted to common shares (if dilutive		87,812,786			87,812,786			87,812,786			87,812,786
Total weighted average common shares outstanding if preferred shares converted to common shares		363,311,235			366,888,202			362,384,959			366,327,778
Effect of dilutive securities:
Share-based awards		3,742,596			6,339,326			4,522,634			6,624,087
1¼% convertible senior notes due 2032		31,312,850			31,312,850			31,312,850			31,312,850
Weighted average diluted shares outstanding		398,366,681			404,540,378			398,220,443			404,264,715
Income per common share:
Basic	$	0.16		$	0.15		$	0.24		$	0.26
Diluted	$	0.14		$	0.14		$	0.22		$	0.23