Convertible Senior Notes (Tables)

9 Months Ended

Sep. 30, 2011

Convertible Senior Notes [Abstract]

Schedule Of Principal Amount Of Liability Component, Unamortized Discount And Net Carrying Amount Of Convertible Senior Notes

	September 30, 2011			December 31, 2010
2004 Notes—Due April 15, 2011
Principal amount	$	—		$	200,000
2007 Notes—Due June 15, 2014
Principal amount	$	575,000		$	575,000
Unamortized debt discount		(86,036	)		(106,303	)
Net carrying amount		488,964			468,697
Total convertible senior notes, net		488,964			668,697
Less current portion		—			(200,000	)
Non-current portion	$	488,964		$	468,697

Schedule Of Interest Expense Capitalized Associated With Construction In Progress

	Three months  ended September 30,				Nine months  ended September 30,
	2011		2010		2011		2010
Coupon interest expense	$	3,076	$	3,007	$	7,060	$	9,448
Non-cash interest from debt discount		4,222		3,768		10,452		11,626
Total capitalized interest	$	7,298	$	6,775	$	17,512	$	21,074