Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt

Long-term debt

	As of December 31,
	2017		2016
	(In thousands)
6.15% senior notes due February 2018 (1)	$	460,762	$	827,539
9.25% senior notes due January 2019		303,489		303,489
5.00% senior notes due September 2020		669,846		669,540
4.625% senior notes due September 2021		695,108		694,868
5.50% senior notes due January 2023		600,000		600,000
5.10% senior notes due September 2023		346,576		346,448
0.75% senior exchangeable notes due January 2024		429,982		—
Term loan facility		—		162,500
Revolving credit facility		510,000		—
Commercial paper		40,000		—
Other		181		297
		4,055,944		3,604,681
Less: current portion		181		297
Less: deferred financing costs		27,997		26,049
	$	4,027,766	$	3,578,335

(1) The 6.15% senior notes due February 2018 have been classified as long-term because we have the ability and intent to repay this obligation utilizing our revolving credit facility. We used the proceeds from our January 2018 senior notes offering to repay these notes

Maturity of primary debt

As of December 31, 2017, the principal amount and maturities of our primary debt for each of the five years after 2017 and thereafter are as follows:

	Paid at Maturity
	(In thousands)
2018	$	460,837	(1)
2019		303,489	(2)
2020		1,220,675	(3)
2021		696,000	(4)
2022		—
Thereafter		1,522,300	(5)
	$	4,203,301

(1) Represents our 6.15% senior notes due February 2018.

(2) Represents our 9.25% senior notes due January 2019.

(3) Represents our 5.0% senior notes due September 2020 and amounts outstanding under our commercial paper program and revolving credit facility due July 2020.

(4) Represents our 4.625% senior notes due September 2021.

(5) Represents our 5.50% senior notes due January 2023, 5.10% senior notes due September 2023 and 0.75% senior exchangeable notes due January 2024.

Short-Term Borrowings

	December 31,
	2017
	(In thousands)
Credit available	$	759,421
Less: Letters of credit outstanding, inclusive of financial and performance guarantees		153,489
Remaining availability	$	605,932