Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2018

Debt Instrument [Line Items]

Summary of Long-Term Debt

We had the following outstanding letters of credit at March 31, 2018 (dollars in thousands):

SemGroup $1.0 billion revolving credit facility	2.25%	$	39,385
Secured bi-lateral (1)	1.75%	$	55,409

(1) Secured bi-lateral letters of credit are external to the SemGroup $1.0 billion revolving credit facility and do not reduce availability for borrowing on the credit facility.

Our long-term debt consisted of the following (dollars in thousands):

	Interest rate at March 31, 2018	March 31, 2018		December 31, 2017
Senior unsecured notes due 2022	5.625%	400,000		400,000
Senior unsecured notes due 2023	5.625%	350,000		350,000
Senior unsecured notes due 2025	6.375%	325,000		325,000
Senior unsecured notes due 2026	7.250%	300,000		300,000
SemGroup $1.0 billion corporate revolving credit facility (1)
Eurodollar borrowings		—		131,000
HFOTCO acquisition final payment	8.000%	578,441		565,868
HFOTCO term loan B (2)	5.800%	530,750		532,125
HFOTCO tax exempt notes payable due 2050	2.816%	225,000		225,000
HFOTCO $75 million revolving credit facility (3)	5.403%	60,000		60,000
Capital leases		27		25
Unamortized premium (discount) and debt issuance costs, net		(29,734	)	(30,398	)
Total long-term debt, net		2,739,484		2,858,620

Less: current portion of long-term debt	5,527		5,525
Noncurrent portion of long-term debt, net	$	2,733,957	$	2,853,095

(1) SemGroup $1.0 billion corporate revolving credit facility matures on March 15, 2021.

(2) HFOTCO term loan B is due in quarterly installments of $1.4 million with a final payment due on August 19, 2021.

(3) HFOTCO $75 million revolving credit facility matures on August 19, 2019.