Debt (Tables)

6 Months Ended

Jun. 30, 2015

Debt

Schedule of components of convertible notes

The components of the convertible notes are as follows (in thousands):

				Carrying Amount
Debt	Interest Rates June 30, 2015		Maturities	June 30, 2015		December 31, 2014
4.75% Convertible Senior Notes due 2015	4.75	%	2015	$	42,940	$	85,640
0.375% Convertible Senior Notes due 2018	0.375	%	2018	321,876		314,752
1.25% Convertible Senior Notes due 2020	1.25	%	2020	295,149		288,726
				659,965		689,118
Less current portion				42,940		85,640
				$	617,025	$	603,478

Schedule of carrying amount and fair value of convertible notes

The carrying amount and fair value of our convertible notes are as follows (in thousands):

	June 30, 2015				December 31, 2014
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
4.75% Convertible Senior Notes due 2015	$	42,940	$	519,217	$	85,640	$	755,143
0.375% Convertible Senior Notes due 2018	321,876		766,875		314,752		560,156
1.25% Convertible Senior Notes due 2020	295,149		773,205		288,726		577,736
	$	659,965	$	2,059,297	$	689,118	$	1,893,035