Filed Pursuant to Rule 424(b)(3)

File No. 333-122316

Prospectus Supplement No. 2

(To Prospectus dated April 28, 2005)

$175,000,000

3.50% CONVERTIBLE SENIOR NOTES DUE 2024

AND

COMMON STOCK ISSUABLE UPON CONVERSION OF THE NOTES

This prospectus supplement No. 2 supplements and amends the prospectus dated April 28, 2005 (as previously supplemented by prospectus supplement No. 1 dated May 25, 2005) relating to $175,000,000 aggregate original principal amount of our 3.50% Convertible Senior Notes due 2024 and shares of our common stock issuable upon conversion of the notes held by the selling securityholders.

The table beginning on page 59 of the prospectus sets forth information with respect to the selling securityholders and the respective amounts of notes beneficially owned by each selling securityholder that may be offered pursuant to the prospectus. The table is hereby supplemented and amended as follows:

Name of Selling Securityholder	Principal Amounts of Notes Beneficially Owned That May be Sold		Percentage of Notes Outstanding		Number of Shares of Common Stock that May Be Sold (1)	Percentage of Common Stock Outstanding (2)
Drawbridge Convertible I Ltd. (42)	$	250,000	0.14	%	11,697	*
Drawbridge Convertible II Ltd. (42)	$	80,000	0.05	%	3,743	*
Drawbridge Global Macro Master Fund Ltd. (42)	$	670,000	0.38	%	31,347	*
Highbridge International LLC (20)	$	10,000,000	5.71	%	467,880	1.83%

(42) The selling securityholder is a wholly-owned subsidiary of an investment fund that is under common control with Fortress Investment Partners, an SEC-registered investment adviser.

The prospectus dated April 28, 2005, as amended and supplemented by this prospectus supplement No. 2 constitutes the prospectus required to be delivered by Section 5(b) of the Securities Act of 1933, as amended, with respect to offers and sales of the notes and the common stock issuable upon conversion of the notes.

Investing in these notes involves risks. See “Risk Factors” beginning on page 3.

The date of this prospectus supplement is June 29, 2005