Note 13 Debt

Debt consisted of the following:

	As of December 31,
	2014		2013
	(In thousands)
2.35% senior notes due September 2016	$	349,887	$	349,820
6.15% senior notes due February 2018		930,693		969,928
9.25% senior notes due January 2019		339,607		339,607
5.00% senior notes due September 2020		698,253		697,947
4.625% senior notes due September 2021		698,388		698,148
5.10% senior notes due September 2023		348,893		348,765
Revolving credit facility		450,000		170,000
Commercial paper		533,119		329,844
Other		6,209		10,243

	$	4,355,049	$	3,914,302
Less: current portion		6,190		10,185

	$	4,348,859	$	3,904,117

As of December 31, 2014, the maturities of our primary debt for each of the five years after 2014 and thereafter are as follows:

	Paid at Maturity
	(In thousands)
2015	$	—
2016		350,000	(1)
2017		983,119	(2)
2018		934,372	(3)
2019		339,607	(4)
Thereafter		1,750,000	(5)

	$	4,357,098

(1)	Represents our 2.35% senior notes due September 2016.
(2)	Represents amounts drawn on our revolving credit facility and commercial paper, which expires November 2017.
(3)	Represents our 6.15% senior notes due February 2018.
(4)	Represents our 9.25% senior notes due January 2019.
(5)	Represents our 5.0% senior notes due September 2020, 4.625% senior notes due September 2021 and 5.10% senior notes due September 2023.

2.35% and 5.10% Senior Notes Due September 2016 and September 2023

In September 2013, Nabors Delaware completed a private placement of $700 million aggregate principal amount of senior notes, comprised of $350 million aggregate principal amount of 2.35% senior notes due 2016 and $350 million aggregate principal amount of 5.10% senior notes due 2023. The notes are unsecured and fully and unconditionally guaranteed by us. The notes are subject to registration rights. The notes were sold by the initial purchasers to qualified institutional buyers pursuant to Rule 144A and to certain investors outside of the United States under Regulation S under the Securities Act. The notes pay interest semiannually on March 15 and September 15, beginning on March 15, 2014. The 2.35% senior notes will mature on September 15, 2016, and the 5.10% senior notes will mature on September 15, 2023.

The notes rank equal in right of payment to all of Nabors Delaware's existing and future senior unsubordinated debt. The notes rank senior in right of payment to all of our existing and future senior subordinated and subordinated debt. Our guarantee of the notes is unsecured and ranks equal in right of payment to all of our unsecured and unsubordinated indebtedness from time to time outstanding. The indenture includes covenants customary for transactions of this type that, subject to significant exceptions, limit our subsidiaries' ability to, among other things, incur certain liens or enter into sale and leaseback transactions. In the event of a Change of Control Trigger Event, as defined in the indenture, with respect to a series of the notes, the holders of that series of notes may require Nabors Delaware to purchase all or a portion of each senior note in cash equal to 101% of the principal amount thereof, plus accrued and unpaid interest, if any. The notes are redeemable in whole or in part at any time at the option of Nabors Delaware at the redemption prices specified in the indenture, plus accrued and unpaid interest. Nabors Delaware used the proceeds from the issuance of the notes, together with cash on hand, to redeem a portion of its 9.25% senior notes due 2019.

6.15% Senior Notes Due February 2018

In February 2008, Nabors Delaware completed a private placement of $575 million aggregate principal amount of 6.15% senior notes due 2018 with registration rights, which are unsecured and are fully and unconditionally guaranteed by us. On July 22, 2008, Nabors Delaware completed an additional private placement under the same indenture of $400 million aggregate principal amount of 6.15% senior notes due 2018, also with registration rights and fully and unconditionally guaranteed by us. These new notes are subject to the same rates, terms and conditions and together will be treated as a single class of debt securities under the indenture (together $975 million 6.15% senior notes due 2018). The issue of notes was resold by the initial purchasers to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain investors outside of the United States pursuant to Regulation S under the Securities Act. The notes bear interest at a rate of 6.15% per year, payable semi-annually on February 15 and August 15 and will mature on February 15, 2018.

The notes are unsecured and are effectively junior in right of payment to any of Nabors Delaware's future secured debt. The senior notes rank equally with any of Nabors Delaware's other existing and future unsubordinated debt and are senior in right of payment to any of Nabors Delaware's future senior subordinated debt. Our guarantee of the senior notes is unsecured and ranks equal in right of payment to all of our unsecured and unsubordinated indebtedness from time to time outstanding. The notes are subject to redemption by Nabors Delaware, in whole or in part, at any time at a redemption price equal to the greater of (i) 100% of the principal amount of the notes then outstanding to be redeemed; or (ii) the sum of the present values of the remaining scheduled payments of principal and interest, determined in the manner set forth in the indenture. In the event of a change in control triggering event, as defined in the indenture, the holders of notes may require Nabors Delaware to purchase all or any part of each note in cash equal to 101% of the principal amount plus accrued and unpaid interest, if any, to the date of purchase, except to the extent Nabors Delaware has exercised its right to redeem the notes.

9.25% Senior Notes Due January 2019

On January 12, 2009, Nabors Delaware completed a private placement of $1.125 billion aggregate principal amount of 9.25% senior notes due 2019 with registration rights, which are unsecured and are fully and unconditionally guaranteed by us. The notes were resold by the initial purchasers to qualified institutional buyers under Rule 144A and to certain investors outside of the United States under Regulation S. The notes bear interest at a rate of 9.25% per year, payable semi-annually on January 15 and July 15 and will mature on January 15, 2019.

The notes are unsecured and are junior in right of payment to any of Nabors Delaware's future secured debt. The notes rank equally with any of Nabors Delaware's other existing and future unsubordinated debt and are senior in right of payment to any of Nabors Delaware's future senior subordinated debt. Our guarantee of the notes is unsecured and ranks equal in right of payment to all of our unsecured and unsubordinated indebtedness from time to time outstanding. The notes are subject to redemption by Nabors Delaware, in whole or in part, at any time at a redemption price equal to the greater of (i) 100% of the principal amount of the notes then outstanding to be redeemed; or (ii) the sum of the present values of the remaining scheduled payments of principal and interest, determined in the manner set forth in the applicable indenture. In the event of a change in control triggering event, as defined in the indenture, the holders of notes may require Nabors Delaware to purchase all or any part of each note in cash equal to 101% of the principal amount plus accrued and unpaid interest, if any, to the date of purchase, except to the extent Nabors Delaware has exercised its right to redeem the notes.

In September 2013, Nabors Delaware commenced a cash tender offer for any and all of its outstanding 9.25% senior notes due 2019, which expired on September 11, 2013. On September 12, 2013, Nabors Delaware accepted for repurchase all of the notes that were validly tendered and not validly withdrawn prior to the expiration of the tender offer, totaling $785.4 million aggregate principal amount of the notes (including $14 million held by a consolidated affiliate). Nabors Delaware paid the holders an aggregate of approximately $1.0 billion in cash, reflecting principal, accrued and unpaid interest and a premium of $211.9 million (including related fees), from the proceeds of the 2.35% senior notes due 2016 and 5.10% senior notes due 2023 issued in September 2013, discussed above, borrowings under its commercial paper program and cash on hand. Following the repurchase, $339.6 million aggregate principal amount of the 9.25% senior notes remains outstanding. The 9.25% senior notes due 2019 have similar rankings, covenants and change of control provisions as Nabors Delaware's other series of senior notes. The premium represents the loss on the debt extinguishment and is included in the impairments and other charges line of our consolidated statement of income (loss) for the year ended December 31, 2013.

5.0% Senior Notes Due September 2020

In September 2010, Nabors Delaware completed a private placement of $700 million aggregate principal amount of 5.0% senior notes due 2020, which are unsecured and fully and unconditionally guaranteed by us. The notes are subject to registration rights. The notes were resold by the initial purchasers to qualified institutional buyers under Rule 144A and to certain investors outside of the United States under Regulation S. The notes pay interest semi-annually on March 15 and September 15 and will mature on September 15, 2020.

The notes rank equal in right of payment to all of Nabors Delaware's existing and future unsubordinated indebtedness, and senior in right of payment to all of Nabors Delaware's existing and future senior subordinated and subordinated indebtedness. Our guarantee of the notes is unsecured and an unsubordinated obligation and ranks equal in right of payments to all of our unsecured and unsubordinated indebtedness from time to time outstanding. In the event of a change of control triggering event, as defined in the indenture, the holders of the notes may require Nabors Delaware to purchase all or a portion of the notes at a purchase price equal to 101% of their principal amount, plus accrued and unpaid interest, if any. The notes are redeemable in whole or in part at any time at the option of Nabors Delaware at a redemption price, plus accrued and unpaid interest, as specified in the indenture. Nabors Delaware used a portion of the proceeds to repay the borrowing under a revolving credit facility incurred to fund our acquisition in September 2010.

4.625% Senior Notes Due September 2021

In August 2011, Nabors Delaware completed a private placement of $700 million aggregate principal amount of 4.625% senior notes due 2021, which are unsecured and fully and unconditionally guaranteed by us. The notes have registration rights. The notes were resold by the initial purchasers to qualified institutional buyers under Rule 144A and to certain investors outside of the United States under Regulation S. The notes pay interest semi-annually on March 15 and September 15 and will mature on September 15, 2021.

The notes rank equal in right of payment to all of Nabors Delaware's existing and future unsubordinated indebtedness, and senior in right of payment to all of Nabors Delaware's existing and future senior subordinated and subordinated indebtedness. Our guarantee of the notes is unsecured and an unsubordinated obligation and ranks equal in right of payments to all of our unsecured and unsubordinated indebtedness from time to time outstanding. In the event of a change of control triggering event, as defined in the indenture, the holders of the notes may require Nabors Delaware to purchase all or a portion of the notes at a purchase price equal to 101% of their principal amount, plus accrued and unpaid interest, if any. The notes are redeemable in whole or in part at any time at the option of Nabors Delaware at a redemption price, plus accrued and unpaid interest, as specified in the indenture. Nabors Delaware used a portion of the proceeds to pay back borrowings on our revolving credit facilities and for other general corporate purposes.

5.375% Senior Notes Due August 2012

In August 2012, we paid $282.4 million to holders of Nabors Delaware's 5.375% senior notes, representing principal of $275.0 million and accrued interest of $7.4 million. We used cash on hand and $270 million from revolving credit facilities to pay this obligation.

Commercial Paper Program

In April 2013, Nabors Delaware established a commercial paper program. This program allows for the issuance from time to time of up to an aggregate amount of $1.5 billion in commercial paper with a maturity of no more than 397 days. Our commercial paper borrowings are classified as long-term debt because the borrowings are fully supported by availability under our revolving credit facility, which matures as currently structured in November 2017, more than one year from now. As of December 31, 2014 and 2013, we had approximately $533.1 and $329.8 million, respectively, of commercial paper outstanding; we used the proceeds to reduce borrowings under our revolving credit facility and redeem debt. The weighted average interest rate on borrowings at December 31, 2014 was 0.369%.

Revolving Credit Facility

At December 31, 2014, we had $516.9 million of remaining availability under our $1.5 billion revolving credit facility. The weighted average interest rate on borrowings at December 31, 2014 was 1.47%. The revolving credit facility contains various covenants and restrictive provisions that limit our ability to incur additional indebtedness, make investments or loans and create liens and require us to maintain a net funded indebtedness to total capitalization ratio, as defined in each agreement. We were in compliance with all covenants under the agreement at December 31, 2014. If we fail to perform our obligations under the covenants, the revolving credit commitment could be terminated, and any outstanding borrowings under the facility could be declared immediately due and payable.

Short-Term Borrowings

We had 11 letter-of-credit facilities with various banks as of December 31, 2014. Availability and borrowings under our letter-of-credit facilities are as follows:

	December 31, 2014
	(In thousands)
Credit available	$	650,204
Less: Letters of credit outstanding, inclusive of financial and performance guarantees		326,650

Remaining availability	$	323,554