Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Instrument [Line Items]

Summary of Long-Term Debt

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

	December 31,
	2015		2014
SemGroup 7.50% senior unsecured notes due 2021	$	300,000	$	300,000
SemGroup corporate revolving credit facility	30,000		35,000
Rose Rock 5.625% senior unsecured notes due 2022	400,000		400,000
Rose Rock 5.625% senior unsecured notes due 2023, net of discount	344,545		—
Rose Rock credit facility	—		32,000
SemMexico credit facility	—		—
Capital leases	83		132
Total long-term debt	1,074,628		767,132
less: current portion of long-term debt	31		40
Noncurrent portion of long-term debt	$	1,074,597	$	767,092

Scheduled Principal Payments of Debt

The following table summarizes the scheduled principal payments as of December 31, 2015 (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.

	SemGroup Notes		Rose Rock 2022 Notes		Rose Rock 2023 Notes		SemGroup Facility		Rose Rock Facility		SemMexico Facility		Capital Leases		Total
For the year ended:
December 31, 2016	$	—	$	—	$	—	$	—	$	—	$	—	$	31	$	31
December 31, 2017	—		—		—		—		—		—		26		26
December 31, 2018	—		—		—		30,000		—		—		26		30,026
December 31, 2019	—		—		—		—		—		—		—		—
December 31, 2020	—		—		—		—		—		—		—		—
Thereafter	300,000		400,000		350,000		—		—		—		—		1,050,000
Total	$	300,000	$	400,000	$	350,000	$	30,000	$	—	$	—	$	83	$	1,080,083

Senior Notes [Member] | Corporate Segment [Member]

Debt Instrument [Line Items]

Early Redemption Premium Percentages [Table Text Block]

From and after June 15, 2016, the Company may redeem the SemGroup 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 on June 15 of each of the years indicated below:

SemGroup 2021 senior unsecured notes
2016	105.625%
2017	103.750%
2018	101.875%
2019 and thereafter	100.000%

Rose Rock Midstream L P [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Early Redemption Premium Percentages [Table Text Block]

From and after July 15, 2017, in the case of the Rose Rock 2022 Notes, or May 15, 2019, in the case of the Rose Rock 2023 Notes, Rose Rock may redeem the Rose Rock 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 on July 15 for the Rose Rock 2022 Notes or May 15 for the Rose Rock 2023 Notes of each of the years indicated below for the respective Notes:

Rose Rock 2022 senior unsecured notes
2017	104.219%
2018	102.813%
2019	101.406%
2020 and thereafter	100.000%

Rose Rock 2023 senior unsecured notes
2019	102.813%
2020	101.406%
2021 and thereafter	100.000%