Filed Pursuant to Rule 424(b)(3)
File No. 333-136584
Prospectus Supplement No. 1
(To Prospectus dated August 11, 2006)
$180,000,000
3.125% Convertible Senior Debentures due 2026
and
Common Stock Issuable Upon Conversion of the Debentures
This prospectus supplement No. 1 supplements and amends the prospectus dated August 11,
2006 relating to $180,000,000 aggregate principal amount of our 3.125% Convertible Senior
Debentures due 2026 and shares of our common stock issuable upon conversion of the debentures held
by the selling securityholders.
The table beginning on page 45 of the prospectus sets forth information with respect to the
selling securityholders and the respective amounts of debentures beneficially owned by each selling
securityholder that may be offered pursuant to the prospectus. Based on information provided by or on behalf
of the named selling securityholders, the table is hereby supplemented
and amended as follows:
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Common |
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Stock |
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Principal Amount of |
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Owned |
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Common |
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Debentures Beneficially |
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Percentage of |
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Prior to |
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Stock |
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Owned and Offered |
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Debentures |
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the |
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Offered |
Selling Securityholder |
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Hereby |
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Outstanding |
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Offering |
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Hereby |
TQA Master Fund Ltd. (4) |
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$ |
3,380,000 |
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1.88 |
% |
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203,614 |
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TQA Master Plus Fund Ltd. (4) |
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$ |
1,660,000 |
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* |
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100,000 |
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Zurich Institutional Benchmarks Master Fund (4) |
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$ |
847,000 |
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* |
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51,024 |
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MSS Convertible Arbitrage 1 Fund (4) |
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$ |
148,000 |
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* |
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8,915 |
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Advent Claymore Enhanced Growth Income Fund (9) |
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$ |
2,000,000 |
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1.11 |
% |
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120,482 |
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Advent Claymore Convertible Sec & Inc Fund (9) |
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$ |
1,000,000 |
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* |
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60,241 |
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Aristeia International Limited (11) |
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$ |
17,600,000 |
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9.78 |
% |
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1,060,241 |
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Aristeia Partners LP (12) |
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$ |
2,400,000 |
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1.33 |
% |
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144,578 |
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Jefferies & Company, Inc. |
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$ |
14,000,000 |
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7.78 |
% |
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843,374 |
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Empyrean Capital Fund, LP (20) |
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$ |
3,052,000 |
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1.70 |
% |
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183,855 |
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Empyrean Capital Overseas Fund, Ltd. (20) |
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$ |
4,506,000 |
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2.50 |
% |
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271,445 |
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Empyrean
Capital Overseas Benefit Plan Fund, Ltd. (20) |
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$ |
442,000 |
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* |
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26,626 |
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Cheyne Fund LP (21) |
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$ |
2,191,000 |
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1.22 |
% |
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131,988 |
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Cheyne Leverage Fund LP (21) |
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$ |
1,809,000 |
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1.01 |
% |
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108,975 |
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(20) |
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Tian Xue has voting and dispositive power over the securities.
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(21) |
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David Treadwell has voting and dispositive power over the securities. |
The prospectus dated August 11, 2006, as amended and supplemented by this prospectus
supplement No. 1, 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 debentures and the
common stock issuable upon conversion of the debentures.
You should carefully review Risk Factors beginning on page 4 of the prospectus and the risk
factors referenced in our periodic reports incorporated by reference in the prospectus, which
discuss various factors you should consider before buying these debentures and the common stock
issuable upon conversion of the debentures.
The date of this prospectus supplement is August 29, 2006.
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