Note 4 - Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2017

Notes Tables

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

	Three Months Ended March 31,
	2017			2016
	(Dollars in thousands, except per share amounts)
Numerator:
Net income	$	82,620		$	72,661
Less: Net income allocated to unvested restricted stock		(301	)		(113	)
Net income available to common stockholders for basic earnings per common share		82,319			72,548
Effect of dilutive securities:
Interest on 1.625% convertible senior notes due 2018		94			(370	)
Interest on 0.25% convertible senior notes due 2019		85			82
Interest on 1.25% convertible senior notes due 2032		64			62
Net income available to common stock for diluted earnings per share	$	82,562		$	72,322
Denominator:
Weighted average basic common shares outstanding		114,487,245			120,814,939
Effect of dilutive securities:
Share-based awards		903,173			561,065
1.625% convertible senior notes due 2018		7,169,940			7,157,934
0.25% convertible senior notes due 2019		3,640,140			3,634,072
1.25% convertible senior notes due 2032		6,304,937			6,262,570
Weighted average diluted shares outstanding		132,505,435			138,430,580
Income per common share:
Basic	$	0.72		$	0.60
Diluted	$	0.62		$	0.52