Convertible Notes (Tables)

12 Months Ended

Dec. 31, 2012

Convertible Notes

Schedule of components of Convertible Notes

				December 31,
				Carrying Amount
	December 31, 2012 Interest Rates
Debt		Maturities		2012		2011
4.75% Convertible Senior Notes due 2015	4.75%		2015	$	322,043	$	298,193
Pfizer Convertible Subordinated Note due 2013	0.0%		2013		—		9,415
Pfizer Convertible Subordinated Note due 2014	0.0%		2014		9,033		8,545
Less current portion					—		—
				$	331,076	$	316,153

Schedule of annual maturities of Convertible Notes

2013	$	—
2014		10,000
2015		400,000
Thereafter		—
	$	410,000

Schedule of carrying amount and fair value of Convertible Notes

	December 31,
	2012				2011
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
4.75% Convertible Senior Notes due 2015	$	322,043	$	798,040	$	298,193		753,760
Pfizer Convertible Subordinated Note due 2013		—		—		9,415		19,357
Pfizer Convertible Subordinated Note due 2014		9,033	$	13,573		8,545		12,754
	$	331,076	$	811,613	$	316,153	$	785,871