Note 5 - Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(Dollars in thousands, except per share amounts)
Numerator:
Net income	$	47,177		$	56,599		$	135,980		$	151,221
Less: Net income allocated to preferred shareholder		(11,342	)		(13,511	)		(32,818	)		(36,165	)
Less: Net income allocated to unvested restricted stock		(93	)		(77	)		(274	)		(211	)
Net income available to common stockholders for basic earnings per common share		35,742			43,011			102,888			114,845
Effect of dilutive securities:
Net income allocated to preferred shareholder		11,342			13,511			32,818			36,165
Interest on 1¼% convertible senior notes due 2032, capitalized and amortized in cost of sales		41			41			490			490
Net income available to common and preferred stock for diluted earnings per share	$	47,125		$	56,563		$	136,196		$	151,500
Denominator:
Weighted average basic common shares outstanding		55,345,443			55,909,542			55,059,683			55,772,603
Weighted average additional common shares outstanding if preferred shares converted to common shares (if dilutive)		17,562,557			17,562,557			17,562,557			17,562,557
Total weighted average common shares outstanding if preferred shares converted to common shares		72,908,000			73,472,099			72,622,240			73,335,160
Effect of dilutive securities:
Share-based awards		684,511			1,251,273			830,501			1,303,188
1¼% convertible senior notes due 2032		6,262,570			6,262,570			6,262,570			6,262,570
Weighted average diluted shares outstanding		79,855,081			80,985,942			79,715,311			80,900,918
Income per common share:
Basic	$	0.65		$	0.77		$	1.87		$	2.06
Diluted	$	0.59		$	0.70		$	1.71		$	1.87