Net Income per Share (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Schedule of calculation of numerator and denominator in earnings per share

	Three Months Ended
	March 31,
Net Income per Basic and Diluted Share:	2016		2015
(in thousands except per share amounts)
Numerator
Income used to compute net income per basic and diluted share	$	55,887	$	84,498
Denominator
Total weighted average shares used to compute net income per basic share	163,701		162,829
Restricted stock outstanding	134		28
Effect of dilutive stock options	—		18
Assumed conversion of Series 2012 Notes	—		666
Assumed conversion of warrants	—		1,927
Assumed conversion of May 2015 Notes	—		4,944
Shares used to compute net income per diluted share	163,835		170,412
Net income per share - basic	$	0.34	$	0.52
Net income per share - diluted	$	0.34	$	0.50