Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2014

Debt Disclosure [Abstract]

Summary of Maturity Dates, Semi-Annual Interest Payment Dates, and Optional Redemption Periods of Outstanding Senior Note Obligations

The following table summarizes the maturity dates, semi-annual interest payment dates, and optional redemption periods related to the Company’s outstanding senior note obligations at September 30, 2014.

	2020 Notes	2021 Notes	2022 Notes	2023 Notes	2024 Notes	2044 Notes
Maturity date	Oct 1, 2020	April 1, 2021	Sep 15, 2022	April 15, 2023	June 1, 2024	June 1, 2044
Interest payment dates	April 1, Oct. 1	April 1, Oct. 1	March 15, Sept. 15	April 15, Oct. 15	June 1, Dec. 1	June 1, Dec.1
Call premium redemption period (1)	Oct 1, 2015	April 1, 2016	March 15, 2017	—	—	—
Make-whole redemption period (2)	Oct 1, 2015	April 1, 2016	March 15, 2017	Jan 15, 2023	Mar 1, 2024	Dec 1, 2043
Equity offering redemption period (3)	—	—	March 15, 2015	—	—	—

(1) On or after these dates, the Company has the option to redeem all or a portion of its senior notes at the decreasing redemption prices specified in the respective senior note indentures (together, the “Indentures”) plus any accrued and unpaid interest to the date of redemption.

(2) At any time prior to these dates, the Company has the option to redeem all or a portion of its senior notes at the “make-whole” redemption prices or amounts specified in the Indentures plus any accrued and unpaid interest to the date of redemption.

(3) At any time prior to this date, the Company may redeem up to 35% of the principal amount of its 2022 Notes under certain circumstances with the net cash proceeds from one or more equity offerings at the redemption price specified in the indenture for the 2022 Notes plus any accrued and unpaid interest to the date of redemption.

Schedule of Long-term Debt Instruments [Table Text Block]

Long-term debt consists of the following at September 30, 2014 and December 31, 2013:

In thousands	September 30, 2014			December 31, 2013
Credit facility	$	—		$	275,000
Note payable	16,967			18,470
8.25% Senior Notes due 2019 (1)	—			298,305
7.375% Senior Notes due 2020 (2)	198,809			198,695
7.125% Senior Notes due 2021 (3)	400,000			400,000
5% Senior Notes due 2022 (4)	2,023,568			2,025,362
4.5% Senior Notes due 2023 (3)	1,500,000			1,500,000
3.8% Senior Notes due 2024 (5)	996,548			—
4.9% Senior Notes due 2044 (6)	698,030			—
Total debt	5,833,922			4,715,832
Less: Current portion of long-term debt	(2,062		)	(2,011		)
Long-term debt, net of current portion	$	5,831,860		$	4,713,821

(1) The carrying amount is net of an unamortized discount of $1.7 million at December 31, 2013. The 2019 Notes were redeemed in July 2014 as discussed further below.

(2) The carrying amount is net of unamortized discounts of $1.2 million and $1.3 million at September 30, 2014 and December 31, 2013, respectively.

(3) These notes were sold at par and are recorded at 100% of face value.

(4) The carrying amount includes an unamortized premium of $23.6 million and $25.4 million at September 30, 2014 and December 31, 2013, respectively.

(5) The carrying amount is net of an unamortized discount of $3.5 million at September 30, 2014.

(6) The carrying amount is net of an unamortized discount of $2.0 million at September 30, 2014.