Our obligations under debt arrangements consisted of the following:



	September 30, 2017						December 31, 2016
	Principal		Unamortized Discount and Debt Issuance Costs ⁽¹⁾		Net Value		Principal		Unamortized Discount and Debt Issuance Costs (1)		Net Value
Senior secured credit facility	$	1,372,500	$	—	$	1,372,500	$	1,278,200	$	—	$	1,278,200
5.750% senior unsecured notes due February 2021	350,000		3,399		346,601		350,000		4,163		345,837
6.750% senior unsecured notes due August 2022	750,000		16,889		733,111		750,000		19,296		730,704
6.000% senior unsecured notes due May 2023	400,000		5,958		394,042		400,000		6,758		393,242
5.625% senior unsecured notes due June 2024	350,000		5,941		344,059		350,000		6,614		343,386
6.500% senior unsecured notes due October 2025	550,000		9,764		540,236		—		—		—
Total long-term debt	$	3,772,500	$	41,951	$	3,730,549	$	3,128,200	$	36,831	$	3,091,369


(1)	Unamortized debt issuance costs associated with our senior secured credit facility (included in Other Long Term Assets on the Unaudited Condensed Consolidated Balance Sheet) were $15.2 million and $10.7 million as of September 30, 2017 and December 31, 2016, respectively.