Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Long-Term Debt

Long-Term Debt at December 31, 2017 and 2016 consisted of the following (in thousands):

	2017		2016
5.875% Senior Notes due 2017	$	—	$	600,000
6.875% Senior Notes due 2018	350,000		350,000
5.625% Senior Notes due 2019	900,000		900,000
4.40% Senior Notes due 2020	500,000		500,000
2.45% Senior Notes due 2020	500,000		500,000
4.100% Senior Notes due 2021	750,000		750,000
2.625% Senior Notes due 2023	1,250,000		1,250,000
3.15% Senior Notes due 2025	500,000		500,000
4.15% Senior Notes due 2026	750,000		750,000
6.65% Senior Notes due 2028	140,000		140,000
3.90% Senior Notes due 2035	500,000		500,000
5.10% Senior Notes due 2036	250,000		250,000
Long-Term Debt	6,390,000		6,990,000
Capital Lease Obligation	32,155		38,710
Less: Current Portion of Long-Term Debt	356,235		6,579
Unamortized Debt Discount	30,564		36,915
Debt Issuance Costs	4,520		5,437
Total Long-Term Debt	$	6,030,836	$	6,979,779