Note 14 - Subsequent Event	3 Months Ended
Mar. 31, 2013
Subsequent Events [Text Block]	Note 14. Subsequent Event Senior Note Issuance On April 12, 2013, we completed an offering of $500 million in aggregate principal amount of our senior notes due May 1, 2021 (the “Notes”) in a private placement conducted pursuant to Rule 144A and Regulation S under the Securities Act of 1933, as amended. The Notes are governed by the Indenture, dated as of April 12, 2013 (the “Indenture”), among the Company and certain of the Company's subsidiaries and The Bank of New York Mellon Trust Company, N.A., as trustee. The Notes bear interest at a rate of 6.875% per year from the date of original issuance or from the most recent payment date to which interest has been paid or provided for. Interest on the Notes is payable on May 1 and November 1 of each year, commencing November 1, 2013. The Notes are guaranteed on a senior unsecured basis by certain of our subsidiaries (the "Guarantors"). The Notes and the guarantees will be our general senior unsecured obligations and will be subordinated to all of our and the Guarantors' existing and future secured debt to the extent of the assets securing that secured debt. In addition, the Notes will be effectively subordinated to all of the liabilities of our subsidiaries that are not guaranteeing the Notes, to the extent of the assets of those subsidiaries. We intend to use the net proceeds from the offering of the Notes ($490 million) to partially fund the acquisition of Aurizon, should it be consummated, and for general corporate purposes, including expenses related to the Aurizon acquisition. See Note 13 for more information. On April 12, 2013, the gross proceeds from the offering were deposited into an escrow account. The holders of the Notes will have the benefit of a first-priority security interest in the escrow account. The release of funds from the escrow account will be subject to the satisfaction of certain conditions, including the substantially concurrent consummation of the acquisition of Aurizon. If the escrow conditions are not satisfied or waived on or prior to September 1, 2013, or such earlier date as we determine that the conditions cannot be satisfied and will not be waived or the escrow agreement is terminated at a time prior thereto, we will be required to redeem all of the Notes no later than five business days thereafter at a price equal to 100% of the principal amount thereof plus accrued and unpaid interest to, but not including, the date of redemption. Escrowed funds would be released and applied to pay for any such redemption, with the remainder of the amount required to complete such redemption being paid by us out of our other available assets. In addition to the mandatory redemption described in the paragraph above, the Notes will be redeemable in whole or in part, at any time and from time to time on or after May 1, 2016, on the redemption dates and at the redemption prices specified in the Indenture, plus accrued and unpaid interest, if any, to the date of redemption. Prior to May 1, 2016, we may redeem some or all of the Notes at a redemption price of 100% of the principal amount, plus accrued and unpaid interest, if any, to the redemption date, plus a “make whole” premium. We may redeem up to 35% of the Notes before May 1, 2016 with the net cash proceeds from certain equity offerings. Upon the occurrence of a change of control (as defined in the Indenture), each holder of Notes will have the right to require us to purchase all or a portion of such holder's Notes pursuant to a change of control offer (as defined in the Indenture), at a purchase price equal to 101% of the principal amount thereof plus accrued and unpaid interest, if any, to the date of purchase, subject to the rights of holders of the Notes on the relevant record date to receive interest due on the relevant interest payment date. In connection with the sale of the Notes, we entered into a Registration Rights Agreement, dated as of April 12, 2013, pursuant to which we and the Guarantors have agreed to (i) file an exchange offer registration statement within 270 days after the issue date of the Notes to exchange the Notes for a new issue of debt securities registered under the Securities Act, with terms substantially identical to those of the Notes (except with respect to certain transfer restrictions and certain obligations to pay special interest as described in the Notes); (ii) use our commercially reasonable efforts to cause the exchange offer registration statement to be declared effective under the Securities Act within 330 days after the issue date of the Notes; (iii) use our commercially reasonable efforts to consummate the exchange offer within 365 days after the issue date of the Notes; and (iv) in certain circumstances, file a shelf registration statement for the resale of the Notes. If we and the Guarantors fail to satisfy our registration obligations under the Registration Rights Agreement, then the annual interest rate on the Notes will increase by 0.25% per annum and by an additional 0.25% per annum for each subsequent 90-day period during which the registration default continues, up to a maximum additional interest rate of 1.0% per annum.

Note 14 - Subsequent Event

3 Months Ended

Mar. 31, 2013

Note 14. Subsequent Event

Senior Note Issuance

On April 12, 2013, we completed an offering of $500 million in aggregate principal amount of our senior notes due May 1, 2021 (the “Notes”) in a private placement conducted pursuant to Rule 144A and Regulation S under the Securities Act of 1933, as amended. The Notes are governed by the Indenture, dated as of April 12, 2013 (the “Indenture”), among the Company and certain of the Company's subsidiaries and The Bank of New York Mellon Trust Company, N.A., as trustee.

The Notes bear interest at a rate of 6.875% per year from the date of original issuance or from the most recent payment date to which interest has been paid or provided for. Interest on the Notes is payable on May 1 and November 1 of each year, commencing November 1, 2013.

The Notes are guaranteed on a senior unsecured basis by certain of our subsidiaries (the "Guarantors"). The Notes and the guarantees will be our general senior unsecured obligations and will be subordinated to all of our and the Guarantors' existing and future secured debt to the extent of the assets securing that secured debt. In addition, the Notes will be effectively subordinated to all of the liabilities of our subsidiaries that are not guaranteeing the Notes, to the extent of the assets of those subsidiaries.

We intend to use the net proceeds from the offering of the Notes ($490 million) to partially fund the acquisition of Aurizon, should it be consummated, and for general corporate purposes, including expenses related to the Aurizon acquisition. See Note 13 for more information.

On April 12, 2013, the gross proceeds from the offering were deposited into an escrow account. The holders of the Notes will have the benefit of a first-priority security interest in the escrow account. The release of funds from the escrow account will be subject to the satisfaction of certain conditions, including the substantially concurrent consummation of the acquisition of Aurizon. If the escrow conditions are not satisfied or waived on or prior to September 1, 2013, or such earlier date as we determine that the conditions cannot be satisfied and will not be waived or the escrow agreement is terminated at a time prior thereto, we will be required to redeem all of the Notes no later than five business days thereafter at a price equal to 100% of the principal amount thereof plus accrued and unpaid interest to, but not including, the date of redemption. Escrowed funds would be released and applied to pay for any such redemption, with the remainder of the amount required to complete such redemption being paid by us out of our other available assets.

In addition to the mandatory redemption described in the paragraph above, the Notes will be redeemable in whole or in part, at any time and from time to time on or after May 1, 2016, on the redemption dates and at the redemption prices specified in the Indenture, plus accrued and unpaid interest, if any, to the date of redemption. Prior to May 1, 2016, we may redeem some or all of the Notes at a redemption price of 100% of the principal amount, plus accrued and unpaid interest, if any, to the redemption date, plus a “make whole” premium. We may redeem up to 35% of the Notes before May 1, 2016 with the net cash proceeds from certain equity offerings.

Upon the occurrence of a change of control (as defined in the Indenture), each holder of Notes will have the right to require us to purchase all or a portion of such holder's Notes pursuant to a change of control offer (as defined in the Indenture), at a purchase price equal to 101% of the principal amount thereof plus accrued and unpaid interest, if any, to the date of purchase, subject to the rights of holders of the Notes on the relevant record date to receive interest due on the relevant interest payment date.

In connection with the sale of the Notes, we entered into a Registration Rights Agreement, dated as of April 12, 2013, pursuant to which we and the Guarantors have agreed to (i) file an exchange offer registration statement within 270 days after the issue date of the Notes to exchange the Notes for a new issue of debt securities registered under the Securities Act, with terms substantially identical to those of the Notes (except with respect to certain transfer restrictions and certain obligations to pay special interest as described in the Notes); (ii) use our commercially reasonable efforts to cause the exchange offer registration statement to be declared effective under the Securities Act within 330 days after the issue date of the Notes; (iii) use our commercially reasonable efforts to consummate the exchange offer within 365 days after the issue date of the Notes; and (iv) in certain circumstances, file a shelf registration statement for the resale of the Notes. If we and the Guarantors fail to satisfy our registration obligations under the Registration Rights Agreement, then the annual interest rate on the Notes will increase by 0.25% per annum and by an additional 0.25% per annum for each subsequent 90-day period during which the registration default continues, up to a maximum additional interest rate of 1.0% per annum.