Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2016

Debt Instrument [Line Items]

Summary of Long-Term Debt

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

	December 31, 2016			December 31, 2015
7.50% senior unsecured notes due 2021	$	300,000		$	300,000
Unamortized debt issuance costs on 2021 notes	(3,708		)	(4,540		)
7.50% senior unsecured notes due 2021, net	296,292			295,460
5.625% senior unsecured notes due 2022	400,000			400,000
Unamortized debt issuance costs on 2022 notes	(5,909		)	(6,975		)
5.625% senior unsecured notes due 2022, net	394,091			393,025
5.625% senior unsecured notes due 2023	350,000			350,000
Unamortized discount on 2023 notes	(4,894		)	(5,455		)
Unamortized debt issuance costs on 2023 notes	(4,596		)	(5,266		)
5.625% senior unsecured notes due 2023, net	340,510			339,279
SemGroup corporate revolving credit facility	20,000			30,000
SemMexico revolving credit facility	—			—
Capital leases	51			83
Total long-term debt, net	1,050,944			1,057,847
Less: current portion of long-term debt	26			31
Noncurrent portion of long-term debt, net	$	1,050,918		$	1,057,816

Early Redemption Premium Percentages [Table Text Block]

the Company may redeem the Notes, in whole or in part, at the redemption prices (expressed as percentages of principal amount) set forth below, plus accrued and unpaid interest, if redeemed during the twelve-month period beginning with each period as indicated below:

2021 Notes
From and after June 15, 2016	105.625%
From and after June 15, 2017	103.750%
From and after June 15, 2018	101.875%
From and after June 15, 2019	100.000%

2022 Notes
Not redeemable before July 15, 2017
From and after July 15, 2017	104.219%
From and after July 15, 2018	102.813%
From and after July 15, 2019	101.406%
From and after July 15, 2020	100.000%

2023 Notes
Not redeemable before May 15, 2019
From and after May 15, 2019	102.813%
From and after May 15, 2020	101.406%
From and after May 15, 2021	100.000%

Scheduled Principal Payments of Debt

The following table summarizes the scheduled principal payments as of December 31, 2016 (in thousands). As described above, our debt agreements require accelerated principal payments under certain circumstances. As a result, principal payments may occur earlier than shown in the table below.

	Notes		SemGroup Facility		SemMexico Facility		Capital Leases		Total
For the year ended:
December 31, 2017	$	—	$	—	$	—	$	26	$	26
December 31, 2018	—		—		—		25		25
December 31, 2019	—		—		—		—		—
December 31, 2020	—		—		—		—		—
December 31, 2021	300,000		20,000		—		—		320,000
Thereafter	750,000		—		—		—		750,000
Total	$	1,050,000	$	20,000	$	—	$	51	$	1,070,051