Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Instrument [Line Items]

Summary of Long-Term Debt

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

	Interest rate at March 31, 2019	March 31, 2019			December 31, 2018
Senior unsecured notes due 2022	5.6250%	$	400,000		$	400,000
Senior unsecured notes due 2023	5.6250%	350,000			350,000
Senior unsecured notes due 2025	6.3750%	325,000			325,000
Senior unsecured notes due 2026	7.2500%	300,000			300,000
SemGroup $1.0 billion corporate revolving credit facility (1)
Alternate base rate borrowings	—	—			24,500
Eurodollar borrowings	—	—			95,000
HFOTCO term loan B (2)	5.2500%	595,500			597,000
HFOTCO tax exempt notes payable due 2050	3.5178%	225,000			225,000
HFOTCO $75 million revolving credit facility	—	—			—
SemCAMS Midstream term loan A(3)
Alternate base rate borrowings	4.5501%	262,096			—
Prime rate borrowings	5.4500%	4			—
SemCAMS Midstream C$450 million revolving credit facility (3)
Alternate base rate borrowings	4.5198%	18,722			—
Prime rate borrowings	5.4500%	26,210			—
Unamortized premium (discount) and debt issuance costs, net		(34,949		)	(31,666		)
Total long-term debt, net		2,467,583			2,284,834
Less: current portion of long-term debt		6,000			6,000
Noncurrent portion of long-term debt, net		$	2,461,583		$	2,278,834

(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 $1.5 million with a final payment due on June 26, 2025.

(3) SemCAMS Midstream term note A and C$450 million revolving credit facility mature on February 25, 2024.

We had the following outstanding letters of credit at March 31, 2019 (dollars in thousands):

SemGroup $1.0 billion revolving credit facility	2.50%	$	27,335
Secured bi-lateral (1)	1.75%	$	18,875

(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.