Rose Rock Midstream 10-Q 5 Aug 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 31, 2016
Entity Registrant Name	Rose Rock Midstream, L.P.
Entity Central Index Key	1,527,622
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Amendment Flag	false
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		36,837,758

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 7,909	$ 9,059
Accounts receivable (net of allowance of $295 and $257, respectively)	319,893	240,606
Receivable from affiliates	9,197	5,944
Inventories	76,343	59,121
Other current assets	8,192	4,884
Total current assets	421,534	319,614
Property, plant and equipment (net of accumulated depreciation of $138,498 and $123,394, respectively)	443,327	441,596
Equity method investments	427,961	438,291
Goodwill	26,628	26,628
Other intangible assets (net of accumulated amortization of $2,384 and $1,443, respectively)	14,626	15,567
Other noncurrent assets, net	3,352	3,894
Total assets	1,337,428	1,245,590
Current liabilities:
Accounts payable	310,685	243,548
Payable to affiliates	18,924	12,995
Accrued liabilities	23,030	22,240
Other current liabilities	3,609	4,246
Total current liabilities	356,248	283,029
Long-term debt, net	774,488	732,356
Commitments and contingencies (Note 7)
Partners’ capital:
General partner	9,427	9,906
Total partners' capital	206,692	230,205
Total liabilities and partners' capital	1,337,428	1,245,590
Common Units [Member] | Public [Member]
Partners’ capital:
Limited partners' capital	71,083	80,829
Common Units [Member] | Semgroup [Member]
Partners’ capital:
Limited partners' capital	$ 126,182	$ 139,470

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accounts receivable, allowance	$ 295	$ 257
Property, plant and equipment, accumulated depreciation	138,498	123,394
Other intangible assets, accumulated amortization	$ 2,384	$ 1,443
Common Units [Member] | Public [Member]
Common units, issued	16,133,340	16,094,260
Common units, outstanding	16,133,340	16,094,260
Common Units [Member] | Semgroup [Member]
Common units, issued	20,704,418	20,704,418
Common units, outstanding	20,704,418	20,704,418

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues, including revenues from affiliates (Note 10):
Product	$ 143,201	$ 193,525	$ 319,823	$ 300,092
Service	25,943	29,778	53,272	57,904
Total revenues	169,144	223,303	373,095	357,996
Expenses, including expenses from affiliates (Note 10):
Costs of products sold, exclusive of depreciation and amortization	128,763	173,133	280,154	269,370
Operating	19,726	23,678	41,133	44,477
General and administrative	5,428	6,329	10,328	11,949
Depreciation and amortization	8,235	10,608	16,128	20,751
Loss (gain) on disposal of long-lived assets, net	(1,714)	22	(2,008)	(130)
Total expenses	163,866	213,726	349,751	346,677
Earnings from equity method investments	17,078	17,683	37,917	38,547
Operating income	22,356	27,260	61,261	49,866
Other expenses (income), net:
Interest expense	12,434	10,197	24,871	18,203
Other income	0	(5)	0	(5)
Total other expenses, net	12,434	10,192	24,871	18,198
Net income	9,922	17,068	36,390	31,668
Earnings Per Unit [Abstract]
Net income allocated to general partner	5,537	5,323	11,405	10,065
Net income allocated to limited partners	$ 4,385	$ 11,745	$ 24,985	$ 21,603
Earnings per limited partner unit, basic	$ 0.12	$ 0.32	$ 0.68	$ 0.60
Earnings per limited partner unit, diluted	$ 0.12	$ 0.32	$ 0.68	$ 0.60
Basic weighted average number of limited partner units outstanding:
Basic weighted average number of limited partner units outstanding	36,838	36,790	36,823	35,803
Diluted weighted average number of limited partner units outstanding:
Diluted weighted average number of limited partner units outstanding	36,915	36,839	36,873	35,849

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 36,390	$ 31,668
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,128	20,751
Loss on disposal of long-lived assets, net	2,008	130
Amortization of debt issuance costs	1,659	1,210
Provision for uncollectible accounts receivable	38	0
Inventory valuation adjustment	0	1,235
Non-cash equity compensation	731	655
Net unrealized loss (gain) related to derivative instruments	(71)	1,116
Earnings from equity method investments	(37,917)	(38,547)
Cash distributions from equity method investments	37,917	38,547
Changes in assets and liabilities, net of the effects of acquisitions:
Decrease (increase) in accounts receivable	(79,325)	(26,359)
Decrease (increase) in receivable from affiliates	(3,253)	(2,128)
Decrease (increase) in inventories	(17,222)	(41,844)
Decrease (increase) in other current assets	(3,285)	(1,407)
Increase (decrease) in accounts payable and accrued liabilities	68,883	31,161
Increase (decrease) in payable to affiliates	5,929	3,683
Net cash provided by operating activities	28,610	19,871
Cash flows from investing activities:
Capital expenditures	(20,390)	(36,262)
Proceeds from sale of long-lived assets	15	126
Contributions to equity method investments	(3,448)	(23,462)
Acquisitions	0	(205,071)
Distributions from equity investments in excess of equity in earnings	13,778	13,077
Net cash used in investing activities	(10,045)	(251,592)
Cash flows from financing activities:
Payments of Debt Issuance Costs	0	5,688
Borrowings on revolving credit facility and issuance of senior secured notes, net of discount	165,500	676,208
Principal payments on revolving credit facility	(124,500)	(364,000)
Principal payments on capital lease obligations	(15)	(24)
Proceeds from common L.P. unit issuance, net of offering costs	0	89,119
Cash consideration in excess of historical cost of acquisitions from SemGroup	0	(46,264)
Cash distributions to partners	(60,700)	(53,153)
Net cash provided by (used in) financing activities	(19,715)	296,198
Net increase (decrease) in cash and cash equivalents	(1,150)	64,477
Cash and cash equivalents at beginning of period	9,059	3,625
Cash and cash equivalents at end of period	$ 7,909	$ 68,102

Overview

Overview	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
OVERVIEW	OVERVIEW Rose Rock Midstream, L.P. is a Delaware limited partnership. The general partner of Rose Rock Midstream, L.P. is Rose Rock Midstream GP, LLC, which is a wholly-owned subsidiary of SemGroup Corporation. SemGroup Corporation is a Delaware corporation headquartered in Tulsa, Oklahoma that provides diversified midstream services to the energy industry. The terms "we," "our," "us," "Rose Rock," the "Partnership" and similar language used in these notes to the unaudited condensed consolidated financial statements refer to Rose Rock Midstream, L.P, and its subsidiaries. The term "SemGroup" refers to SemGroup Corporation and its controlled subsidiaries, including Rose Rock Midstream GP, LLC. Basis of presentation These condensed consolidated financial statements include the accounts of Rose Rock Midstream, L.P. and its controlled subsidiaries. The condensed consolidated balance sheet at December 31, 2015 , which is derived from audited financial statements and the unaudited condensed consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") and the rules and regulations of the SEC. These condensed consolidated financial statements include all normal and recurring adjustments that, in the opinion of management, are necessary to present fairly the financial position of the Partnership and the results of its operations and its cash flows. All significant transactions between Rose Rock Midstream, L.P. and its consolidated subsidiaries have been eliminated. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts and disclosures in the financial statements. Although management believes these estimates are reasonable, actual results could differ materially from these estimates. The results of operations for the three months and six months ended June 30, 2016 , are not necessarily indicative of the results to be expected for the full year ending December 31, 2016 . Pursuant to the rules and regulations of the SEC, the accompanying condensed consolidated financial statements do not include all of the information and notes normally included with financial statements prepared in accordance with U.S. GAAP. Certain reclassifications have been made to conform previously reported balances to the current presentation. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2015, which are included in our Annual Report on Form 10-K for the year ended December 31, 2015 , filed with the SEC. Our significant accounting policies are consistent with those described in Note 2 of our Annual Report on Form 10-K for the year ended December 31, 2015. Pending merger On May 30, 2016, Rose Rock entered into an Agreement and Plan of Merger (the "Merger Agreement") with SemGroup whereby SemGroup would acquire the outstanding common limited partner units of Rose Rock not already beneficially owned by SemGroup in exchange for shares of SemGroup Class A common stock. Each common limited partner unit of Rose Rock would be acquired in exchange for 0.8136 shares of SemGroup Class A common stock. Completion of the merger is conditioned upon, among other things: (i) majority approval of Rose Rock common unitholders; (ii) all material required governmental consents and approvals having been received; (iii) the absence of legal injunctions or impediments prohibiting the transactions contemplated by the Merger Agreement; (iv) the effectiveness of a registration statement on Form S-4 with respect to the issuance of SemGroup stock to be issued in exchange for Rose Rock common limited partner units; (v) approval of the listing on the New York Stock Exchange, subject to official notice of issuance, of the SemGroup Class A common stock to be issued; and (vi) majority approval by SemGroup stockholders of the SemGroup Class A common stock issuance. A subsidiary of SemGroup which beneficially owns a majority of Rose Rock's common units has agreed to deliver a written consent approving the Merger Agreement and the transactions contemplated by such agreement. The Merger Agreement provides for certain termination rights for Rose Rock. The Merger Agreement provides that upon termination of the Merger Agreement (i) in connection with the failure of the stockholders of SemGroup to approve the SemGroup stock issuance, SemGroup will pay Rose Rock's out-of-pocket expenses in an amount up to $3.8 million and (ii) in connection with a change by SemGroup of its recommendation in favor of approval of the SemGroup stock issuance under certain circumstances, SemGroup will pay to Rose Rock a termination fee in the amount of $15.5 million . Under no circumstance will SemGroup be required to both reimburse Rose Rock's expenses and pay Rose Rock the termination fee. Recent accounting pronouncements In June 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments", which introduces new guidance for estimating credit losses on certain types of financial instruments based on expected losses and the timing of the recognition of such losses. For public entities, this ASU is effective for annual periods beginning after December 15, 2019, and interim periods within those years and early adoption is permitted in the year prior to the effective date. We will adopt this guidance in the first quarter of 2020. The impact is not expected to be material. In March 2016, the FASB issued ASU 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting'', which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. For public entities, this ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those years and early adoption is permitted. The Company will adopt this guidance in the first quarter of 2017. The impact is not expected to be material. In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)", which amends the existing lease guidance to require lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by operating and finance leases and to disclose additional quantitative and qualitative information about leasing arrangements. This ASU also provides clarifications surrounding the presentation of the effects of leases in the income statement and statement of cash flows. For public entities, this ASU will be effective for annual periods beginning after December 15, 2018, and interim periods within those years. The new guidance shall be applied using a modified retrospective approach and early adoption is permitted. We are currently evaluating the impact of the adoption of ASU 2016-02 on our consolidated financial statements. We will adopt this guidance in the first quarter of 2019. In July 2015, the FASB issued ASU 2015-11, "Inventory (Topic 330): Simplifying the Measurement of Inventory", which requires that inventory within the scope of the guidance be measured at the lower of cost and net realizable value rather than the lower of cost or market. The standard will be effective for public business entities for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The new guidance shall be applied prospectively and early adoption is permitted. We will adopt this guidance in the first quarter of 2017. The impact is not expected to be material. On April 7, 2015, the FASB issued ASU 2015-03, “Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs”, which is designed to simplify presentation of debt issuance costs. The standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. In August 2015, the FASB issued ASU 2015-15, “Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements - Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting”, which amended the SEC paragraphs of ASC Subtopic 835-30 to include the language from the SEC Staff Announcement indicating that the SEC would not object to presenting deferred debt issuance costs related to line-of-credit agreements as assets and subsequently amortizing the deferred debt issuance costs ratably over the term of the agreement. The standards are effective for U.S. public companies for annual reporting periods beginning after December 15, 2015. The new guidance has been applied on a retrospective basis for all periods presented. We adopted this guidance in the first quarter of 2016. The impact was not material. For presentation purposes, $12.2 million of debt issuance costs which had previously been reported as other noncurrent assets were reclassified as a reduction of long-term debt on the December 31, 2015 balance sheet. Capitalized loan fees related to our revolving credit facility continue to be presented as other noncurrent assets. In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers", which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP. The standard permits using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). In August 2015, the FASB issued ASU 2015-14 which deferred the effective date of ASU 2014-09 by one year. In March 2016, the FASB issued ASU 2016-08 which amended the principal-versus-agent implementation guidance set forth in ASU 2014-09. Among other things, ASU 2016-08 clarifies that an entity should evaluate whether it is the principal or the agent for each specified good or service promised in a contract with a customer. In April 2016, the FASB issued ASU 2016-10 which amended certain aspects of the guidance related to identifying performance obligations and licensing implementation within ASU 2014-09. In June 2016, the FASB issued ASU 2016-12 which narrows the scope around certain aspects of the criterion used in determining when to recognize revenue. We are currently evaluating the impact of our pending adoption of ASU 2014-09 on our consolidated financial statements and have not yet determined the method by which we will adopt the standard. We will adopt this guidance in the first quarter of 2018.

Equity Method Investment

Equity Method Investment	6 Months Ended
	Jun. 30, 2016
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments Disclosure [Text Block]	EQUITY METHOD INVESTMENTS Under the equity method, we do not report the individual assets and liabilities of our investees. Instead, our membership interests are reflected in one line as a noncurrent asset on our condensed consolidated balance sheets. Our equity method investments consisted of the following (in thousands): June 30, 2016 December 31, 2015 White Cliffs Pipeline, L.L.C. $ 290,668 $ 297,109 Glass Mountain Pipeline, LLC 137,293 141,182 Total equity method investments $ 427,961 $ 438,291 Our earnings from equity method investments consisted of the following (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 White Cliffs Pipeline, L.L.C. $ 16,428 $ 15,545 $ 36,208 $ 34,635 Glass Mountain Pipeline, LLC 650 2,138 1,709 3,912 Total earnings from equity method investments $ 17,078 $ 17,683 $ 37,917 $ 38,547 Cash distributions received from equity method investments consisted of the following (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 White Cliffs Pipeline, L.L.C. $ 21,664 $ 20,551 $ 45,762 $ 44,705 Glass Mountain Pipeline, LLC 3,118 5,009 5,933 6,920 Total cash distributions received from equity method investments $ 24,782 $ 25,560 $ 51,695 $ 51,625 White Cliffs Pipeline, L.L.C. Certain unaudited summarized income statement information of White Cliffs Pipeline, L.L.C. ("White Cliffs") for the three months and six months ended June 30, 2016 and 2015 is shown below (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Revenues $ 55,586 $ 48,509 $ 113,642 $ 103,123 Cost of products sold $ 2,803 $ 169 $ 3,053 $ 1,102 Operating, general and administrative expenses $ 10,125 $ 8,876 $ 19,727 $ 16,296 Depreciation and amortization expense $ 10,084 $ 8,587 $ 19,047 $ 17,125 Net income $ 32,575 $ 30,870 $ 71,822 $ 68,593 Our equity in earnings of White Cliffs for the three months and six months ended June 30, 2016 and 2015 is less than 51% of the net income of White Cliffs for the same periods. This is due to certain general and administrative expenses incurred in managing the operations of White Cliffs that the other owners are not obligated to share. Such expenses are recorded by White Cliffs and are allocated to our ownership interest. White Cliffs recorded $0.4 million and $0.4 million of such general and administrative expense for the three months ended June 30, 2016 and 2015 , respectively. White Cliffs recorded $0.9 million and $0.7 million of such general and administrative expense for the six months ended June 30, 2016 and 2015 , respectively. The members of White Cliffs are required to contribute capital to White Cliffs to fund various projects. For the six months ended June 30, 2016 , we contributed $2.2 million for an expansion project that added approximately 65,000 barrels per day of capacity. Glass Mountain Pipeline, LLC As discussed in Note 3, on February 13, 2015, our Transportation segment acquired Glass Mountain Holding, LLC, which owns a 50% interest in Glass Mountain Pipeline, LLC ("Glass Mountain"). The excess of the recorded amount of our investment over the book value of our share of the underlying net assets represents equity method goodwill and capitalized interest at June 30, 2016 . Capitalized interest is amortized as a reduction of earnings from equity method investments. Certain summarized unaudited income statement information of Glass Mountain for the three months and six months ended June 30, 2016 and 2015 is shown below (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Revenues $ 6,898 $ 9,788 $ 15,470 $ 20,909 Cost of sales $ (120 ) $ (40 ) $ 445 $ 1,974 Operating, general and administrative expenses $ 1,618 $ 1,513 $ 3,463 $ 2,920 Depreciation and amortization expense $ 3,989 $ 3,932 $ 7,925 $ 7,976 Net income $ 1,407 $ 4,381 $ 3,632 $ 8,036 Our equity in earnings of Glass Mountain for the three months and six months ended June 30, 2016 and 2015 is less than 50% of the net income of Glass Mountain for the same period due to amortization of capitalized interest for the period. For the six months ended June 30, 2016 , we contributed $0.3 million to Glass Mountain related to capital projects.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2016
Acquisitions [Abstract]
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	ACQUISITIONS On February 13, 2015, we acquired the Wattenberg Oil Trunkline ("WOT") and a 50% interest in Glass Mountain, from SemGroup in exchange for (i) cash of approximately $251.2 million , (ii) the issuance of 1.75 million common units, and (iii) an increase of the capital account of our general partner and a related issuance of general partner interest, to allow our general partner to maintain its 2% general partner interest in us. The WOT is a 75 -mile, 12 -inch diameter crude oil gathering pipeline system that transports crude oil from production facilities in the DJ Basin to White Cliffs' pipeline. It has a capacity of approximately 85,000 barrels per day. Glass Mountain owns a 215 -mile crude oil pipeline in western and north central Oklahoma that is operated by Rose Rock. The cash consideration was funded through a borrowing under our credit facility and the issuance and sale of 2.3 million common units in an underwritten public offering. As the transaction was between entities under common control, we recorded the acquired assets and liabilities based on SemGroup's historical cost. The purchase price in excess of historical cost was treated as an equity transaction with SemGroup, which reduced the partners' capital accounts of our general and limited partners on a pro-rata basis. The acquisition is reflected in our results as of January 1, 2015, which was the agreed upon date of transfer between SemGroup and Rose Rock. The difference between accounting for the transfer on January 1, 2015 versus the closing date of the transaction, February 13, 2015, is not significant to our financial results.

Segments

Segments	6 Months Ended
	Jun. 30, 2016
Segment Reporting Information [Line Items]
Segment Reporting Disclosure [Text Block]	SEGMENTS During the year ended December 31, 2015, management made the decision to disaggregate certain activities and functions within the Partnership to provide additional granularity, both internally and externally, to our operating results. As such, the prior period results have been recast to reflect the resulting reportable segments. Our segments are organized by our key revenue generating activities. Our Transportation segment includes revenue generated through fees charged for the physical movement of crude oil utilizing our truck and pipeline assets. Our Facilities segment includes revenue generated through crude oil storage fees, truck unloading fees and other ancillary activities related to our facilities. Our Supply and Logistics segment includes revenue generated through the marketing of crude oil and includes related derivative activity. Although Corporate and Other does not represent an operating segment, it is included in the tables below to reconcile segment information to that of the consolidated Partnership. Current year activity includes intersegment revenues generated by our Transportation and Facilities segments for services provided to our Supply and Logistics segment. With the exception of intersegment trucking revenues, these intersegment charges did not exist in the prior year. Eliminations of transactions between segments are also included within Corporate and Other in the tables below. The accounting policies of each segment are the same as the accounting policies of the consolidated Partnership. Transactions between segments are generally recorded based on prices negotiated between the segments. Certain general and administrative expenses incurred at the corporate level were allocated to the segments based on our allocation policies in effect at the time. Our results by segment are presented in the tables below (in thousands): Three months ended June 30, 2016 Transportation Facilities Supply and Logistics Corporate and Other Consolidated Revenues: External $ 15,644 $ 10,299 $ 143,201 $ — $ 169,144 Intersegment 5,127 2,527 — (7,654 ) — Total revenues $ 20,771 $ 12,826 $ 143,201 $ (7,654 ) $ 169,144 Depreciation and amortization $ 6,171 $ 1,921 $ 40 $ 103 $ 8,235 Earnings from equity method investment $ 17,078 $ — $ — $ — $ 17,078 Segment profit (1) $ 18,421 $ 9,371 $ 10,069 $ (2,793 ) $ 35,068 Three months ended June 30, 2015 Transportation Facilities Supply and Logistics Corporate and Other Consolidated Revenues: External $ 22,425 $ 11,402 $ 189,476 $ — $ 223,303 Intersegment 3,562 — — (3,562 ) — Total revenues $ 25,987 $ 11,402 $ 189,476 $ (3,562 ) $ 223,303 Depreciation and amortization $ 9,038 $ 1,406 $ 40 $ 124 $ 10,608 Earnings from equity method investment $ 17,683 $ — $ — $ — $ 17,683 Segment profit (1) $ 19,984 $ 7,963 $ 10,978 $ (2,472 ) $ 36,453 Six Months Ended June 30, 2016 Transportation Facilities Supply and Logistics Corporate and Other Consolidated Revenues: External $ 32,839 $ 20,433 $ 319,823 $ — $ 373,095 Intersegment 12,341 5,272 — (17,613 ) — Total revenues $ 45,180 $ 25,705 $ 319,823 $ (17,613 ) $ 373,095 Depreciation and amortization $ 12,030 $ 3,805 $ 80 $ 213 $ 16,128 Earnings from equity method investment $ 37,917 $ — $ — $ — $ 37,917 Segment profit (1) $ 44,013 $ 18,958 $ 19,162 $ (4,815 ) $ 77,318 Total assets at June 30, 2016 (excluding intersegment receivables) $ 739,904 $ 154,359 $ 430,297 $ 12,868 $ 1,337,428 Equity investments at June 30, 2016 $ 427,961 $ — $ — $ — $ 427,961 Six Months Ended June 30, 2015 Transportation Facilities Supply and Logistics Corporate and Other Consolidated Revenues: External $ 42,752 $ 22,807 $ 292,437 $ — $ 357,996 Intersegment 7,283 — — (7,283 ) — Total revenues $ 50,035 $ 22,807 $ 292,437 $ (7,283 ) $ 357,996 Depreciation and amortization $ 17,656 $ 2,775 $ 79 $ 241 $ 20,751 Earnings from equity method investment $ 38,547 $ — $ — $ — $ 38,547 Segment profit (1) $ 44,508 $ 16,365 $ 16,159 $ (5,299 ) $ 71,733 Total assets at December 31, 2015 (excluding intersegment receivables) $ 745,612 $ 155,186 $ 328,419 $ 16,373 $ 1,245,590 Equity investments at December 31, 2015 $ 438,291 $ — $ — $ — $ 438,291 (1) Segment profit represents revenues excluding unrealized gains (losses) related to derivative instruments plus earnings from equity method investments less cost of sales excluding depreciation and amortization and less operating and general and administrative expenses. Three Months Ended June 30, Six Months Ended June 30, Reconciliation of segment profit to net income: 2016 2015 2016 2015 Total segment profit $ 35,068 $ 36,453 $ 77,318 $ 71,733 Less: Net unrealized loss (gain) related to derivative instruments 4,477 (1,415 ) (71 ) 1,116 Depreciation and amortization 8,235 10,608 16,128 20,751 Interest expense 12,434 10,197 24,871 18,203 Other income — (5 ) — (5 ) Net income $ 9,922 $ 17,068 $ 36,390 $ 31,668

Financial Instruments

Financial Instruments	6 Months Ended
	Jun. 30, 2016
Financial Instruments And Fair Value Disclosures [Abstract]
Financial Instruments Disclosure [Text Block]	FINANCIAL INSTRUMENTS Commodity derivative contracts Our results of operations and cash flows are impacted by changes in market prices for petroleum products. This exposure to commodity price risk is managed, in part, by entering into various commodity derivatives. We seek to manage the price risk associated with our marketing operations by limiting our net open positions through (i) the concurrent purchase and sale of like quantities of crude oil to create back-to-back transactions that are intended to lock in positive margins based on the timing, location or quality of the crude oil purchased and delivered or (ii) derivative contracts. Our storage and transportation assets also can be used to mitigate time and location basis risks, respectively. All marketing activities are subject to our Comprehensive Risk Management Policy, which establishes limits in order to manage risk and mitigate financial exposure. Our commodity derivatives can be comprised of crude oil and natural gas liquids forward contracts and futures contracts. These are defined as follows: Forward contracts – Over the counter ("OTC") contracts to buy or sell a commodity at an agreed upon future date. The buyer and seller agree on specific terms (price, quantity, delivery period, and location) and conditions at the inception of the contract. Futures contracts – Exchange traded contracts to buy or sell a commodity. These contracts are standardized by the exchange in terms of quality, quantity, delivery period and location for each commodity. We record commodity derivative assets and liabilities at fair value at each balance sheet date with the exception of commitments which have been designated as normal purchases and sales. The table below summarizes the balances of these assets and liabilities at June 30, 2016 and December 31, 2015 (in thousands): June 30, 2016 December 31, 2015 Level 1 Netting* Total Level 1 Netting* Total Assets $ 1,160 $ (1,160 ) $ — $ 131 $ (131 ) $ — Liabilities $ 1,428 $ (1,160 ) $ 268 $ 470 $ (131 ) $ 339 * Relates primarily to exchange traded futures. Gain and loss positions on multiple contracts are settled net on a daily basis with the exchange. "Level 1" measurements are based on inputs consisting of unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. These include commodity futures contracts that are traded on an exchange. "Level 2" measurements are based on inputs consisting of market observable and corroborated prices for similar derivative contracts. Assets and liabilities classified as Level 2 include OTC traded physical fixed priced purchases and sales forward contracts. "Level 3" measurements are based on inputs from a pricing service and/or internal valuation models incorporating observable and unobservable market data. Financial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the measurement requires judgment and may affect the valuation of assets and liabilities and their placement within the fair value levels. At June 30, 2016 , all of our physical fixed price forward purchases and sales contracts were being accounted for as normal purchases and normal sales. There were no financial assets or liabilities recorded at fair value which were classified as Level 2 or Level 3 during the three months and six months ended June 30, 2016 and 2015. As such, no rollforward of Level 3 activity has been presented. The following table sets forth the notional quantities for commodity derivative instruments entered into during the periods indicated (in thousands of barrels): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Sales 5,890 7,721 16,310 13,452 Purchases 5,743 7,508 16,253 13,413 We have not designated any of our commodity derivative instruments as accounting hedges. We record the fair value of the derivative instruments on our condensed consolidated balance sheets in other current assets and other current liabilities. The fair value of our commodity derivative assets and liabilities recorded to other current assets and other current liabilities was as follows (in thousands): June 30, 2016 December 31, 2015 Assets Liabilities Assets Liabilities Commodity contracts $ — $ 268 $ — $ 339 We have posted margin deposits as collateral with brokers who have the right of set off associated with these funds. At June 30, 2016 and December 31, 2015, our margin deposit balances were in a net asset position of $5.1 million and $2.9 million , respectively. These margin account balances have not been offset against our net commodity derivative instrument (contract) positions. Had these margin account balances been netted against our net commodity derivative instrument (contract) positions as of June 30, 2016 and December 31, 2015, we would have had net asset positions of $4.8 million and $2.6 million , respectively. Realized and unrealized gains (losses) from our commodity derivatives were recorded to product revenue in the following amounts (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Commodity contracts $ (7,127 ) $ (2,202 ) $ (3,773 ) $ (2,846 ) Concentrations of risk During the three months ended June 30, 2016 , two third-party customers, primarily of our Supply and Logistics segment, accounted for more than 10% of our consolidated revenues at approximately 51% and 14% . We purchased approximately $17.1 million of product from one third-party supplier, which represented approximately 13% of our costs of products sold. During the six months ended June 30, 2016 , two third-party customers, primarily of our Supply and Logistics segment, accounted for more than 10% of our consolidated revenues at approximately 53% and 11% . We purchased approximately $39.5 million of product from one third-party supplier, which represented approximately 14% of our costs of products sold. At June 30, 2016 , two third-party customers, primarily of our Supply and Logistics segment, accounted for 51% of our total accounts receivable.

Long Term Debt

Long Term Debt	6 Months Ended
	Jun. 30, 2016
Debt Disclosure [Abstract]
Long-term Debt	LONG-TERM DEBT Our long-term debt consisted of the following (in thousands): June 30, December 31, 5.625% senior unsecured notes due 2022 $ 400,000 $ 400,000 Unamortized debt issuance costs on 2022 notes (6,442 ) (6,975 ) 5.625% senior unsecured notes due 2022, net 393,558 393,025 5.625% senior unsecured notes due 2023 350,000 350,000 Unamortized discount on 2023 notes (5,178 ) (5,455 ) Unamortized debt issuance costs on 2023 notes (4,931 ) (5,266 ) 5.625% senior unsecured notes due 2023, net 339,891 339,279 Revolving credit facility 41,000 — Capital leases 64 83 Total long-term debt, net 774,513 732,387 Less: current portion of long-term debt 25 31 Noncurrent portion of long-term debt, net $ 774,488 $ 732,356 Senior unsecured notes due 2022 At June 30, 2016 , we had $400 million of 5.625% senior unsecured notes due 2022 outstanding ("2022 Notes"). Rose Rock and Rose Rock Finance Corporation ("Finance Corp.") are co-issuers of the 2022 Notes. For the three months ended June 30, 2016 and 2015 , we incurred $5.9 million and $5.9 million , respectively, of interest expense related to these notes, including amortization of debt issuance costs. For the six months ended June 30, 2016 and 2015 , we incurred $11.7 million and $11.7 million , respectively, of interest expense related to these notes, including amortization of debt issuance costs. Senior unsecured notes due 2023 At June 30, 2016 , we had $350 million of 5.625% senior unsecured notes due 2023 (the "2023 Notes"), which were issued on May 14, 2015. Rose Rock and Finance Corp. are co-issuers of the 2023 Notes. For the three months ended June 30, 2016 and 2015 , we incurred $5.2 million and $2.7 million , respectively, of interest expense related to these notes, including amortization of debt issuance costs and discount. For the six months ended June 30, 2016 and 2015 , we incurred $10.4 million and $2.7 million , respectively, of interest expense related to these notes, including amortization of debt issuance costs and discount. Subsidiary Guarantors The 2022 Notes and the 2023 Notes are guaranteed by all of our existing subsidiaries other than Finance Corp. Such guarantees of the 2022 Notes and the 2023 Notes are full and unconditional and constitute the joint and several obligations of the subsidiary guarantors. Each of the subsidiary guarantors is 100% owned by the Partnership. The Partnership has no assets or operations independent of its subsidiaries and there are no significant restrictions upon the ability of the Partnership, or any of its subsidiaries, to obtain funds from its respective subsidiaries by dividend or loan. None of the assets of the Partnership's subsidiaries represent restricted net assets pursuant to Rule 4-08(e)(3) of Regulation S-X under the Securities Act. Revolving credit facility At June 30, 2016 , we had $41.0 million of outstanding borrowings on our $585 million revolving credit facility, which incurred interest at the alternate base rate ("ABR") plus an applicable margin. At June 30, 2016 , the interest rate in effect on ABR borrowings was 5.25% . We had $37.7 million in outstanding letters of credit at June 30, 2016, and the rate per annum was 2.75% . At June 30, 2016 , we had $18.9 million of secured bilateral letters of credit outstanding. The interest rate in effect was 1.75% . Secured bilateral letters of credit are external to the facility and do not reduce availability for borrowing on our revolving credit facility. We incurred $1.6 million and $2.0 million of interest expense related to this facility during the three months ended June 30, 2016 and 2015 , respectively, including letters of credit and amortization of debt issuance costs. We incurred $3.1 million and $4.2 million of interest expense related to this facility during the six months ended June 30, 2016 and 2015 , respectively, including amortization of debt issuance costs. Fair value We estimate the fair value of our 2022 Notes and 2023 Notes to be $352 million and $305 million , respectively, at June 30, 2016, based on unadjusted, transacted market prices near the measurement date, which are categorized as Level 2 measurements. We estimate that the fair value of our revolving long-term debt was not materially different than the reported values at June 30, 2016, and is categorized as a Level 2 measurement. It is our belief that neither the market interest rates nor our credit profile have changed significantly enough to have had a material impact on the fair value of our revolving debt outstanding at June 30, 2016.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Bankruptcy matters On July 22, 2008 (the "Petition Date"), SemGroup, L.P., SemCrude, L.P. ("SemCrude"), the predecessor of Rose Rock, and Eaglwing, L.P. ("Eaglwing") filed petitions for reorganization under Chapter 11 of the U.S. Bankruptcy Code. While in bankruptcy, SemGroup, L.P. filed a plan of reorganization with the court, which was confirmed on October 28, 2009 (the "Plan of Reorganization"). The Plan of Reorganization determined, among other things, how pre-Petition Date obligations would be settled, the equity structure of the reorganized company upon emergence and the financing arrangements upon emergence. SemGroup, SemCrude, and Eaglwing emerged from bankruptcy protection on November 30, 2009 (the "Emergence Date"). Claims reconciliation process A large number of parties made claims against SemGroup and the other debtors for obligations alleged to have been incurred prior to the bankruptcy filing. SemGroup has resolved or settled all of these outstanding claims and has made all required distributions. The Plan of Reorganization has therefore been fully administered. On November 7, 2014, SemGroup Corporation and the other reorganized debtors moved for a final decree from the bankruptcy court closing the debtors’ bankruptcy cases. The United States Bankruptcy Court for the District of Delaware granted the request and entered its Order Granting Motion of Remaining Debtors for Entry of Final Decree on December 18, 2014. Accordingly, the bankruptcy cases for SemCrude, L.P., Eaglwing, L.P., SemCanada II, L.P., SemCanada L.P., SemGas, L.P., SemGroup, L.P., SemMaterials, L.P., and SemStream, L.P. have been closed. As part of its decree, the Court retained jurisdiction over certain on-going adversary proceedings, but the debtors have estimated and paid the claims associated with these remaining adversaries, leaving the non-debtor parties to the adversaries to resolve their remaining claims amongst themselves. On January 2, 2015, Bettina M. Whyte, the duly appointed Trustee of the SemGroup Litigation Trust (the "Litigation Trustee"), filed a notice of appeal of the Bankruptcy Court’s December 18, 2014 order closing the aforementioned bankruptcy cases. However, the Bankruptcy Court’s order of final decree was effective upon entry, and the appeal does not stay the effect of the order. The Litigation Trustee’s appeal to the United States District Court for the District of Delaware is currently pending and will be opposed by SemGroup Corporation and the other remaining reorganized debtors. We are indemnified by SemGroup against any loss in this matter pursuant to the terms of the omnibus agreement with SemGroup. Environmental We may, from time to time, experience leaks of petroleum products from our facilities and, as a result of which, we may incur remediation obligations or property damage claims. In addition, we are subject to numerous environmental regulations. Failure to comply with these regulations could result in the assessment of fines or penalties by regulatory authorities. The Kansas Department of Health and Environment ("KDHE") initiated discussions during SemGroup’s bankruptcy proceeding regarding five of our sites in Kansas that the KDHE believes, based on their historical use, may have soil or groundwater contamination in excess of state standards. All five sites were initially investigated in 2011 and 2012. One site was issued a closure letter by the KDHE in 2012. The remaining four sites are in various stages of follow up investigation, remediation, monitoring, or closure under KDHE oversight. The environmental work at these sites is being completed under consent orders between Rose Rock Midstream Crude, L.P. and the KDHE. Two of the remaining sites have limited impacts to shallow soil and groundwater and the groundwater is currently being monitored on a semi-annual basis until such time that closure can be granted by the KDHE. No active remediation is anticipated for these two sites. The final two sites have required additional investigation and soil and groundwater remediation may be necessary to achieve KDHE closure. Rose Rock does not anticipate any penalties or fines for these historical sites. We are indemnified by SemGroup against any loss in this matter pursuant to the terms of the omnibus agreement with SemGroup. We received a Notice of Probable Violation and Civil Penalty dated March 29, 2016, from the U.S. Department of Transportation (the "Notice") for alleged violations of pipeline operation and maintenance regulations related to a 2014 crude oil release that occurred on our Blackwell to See pipeline segment located in Oklahoma. This pipeline segment was idled in March 2016 when we initiated service on our new pipeline segment that transports Kansas crude volumes to our Cushing, Oklahoma terminal. The Notice proposes a penalty of $600,200 . We responded to the Notice in April 2016 with information that we believe warrants reduction of the amount of the proposed penalty. Dimmit County, TX claims An employee of Rose Rock Midstream Field Services, LLC was involved in a tractor trailer accident on January 15, 2015 in Dimmit County, Texas. A second accident followed resulting in six fatalities and multiple injuries. Multiple lawsuits involving claims of wrongful death and personal injury were filed in Zavala County and Dimmit County, Texas. These lawsuits have been consolidated in the District Court, 293rd Judicial District, Zavala County, Texas, as cause number 15-01-13356-ZCV, Maribel Rodriguez and the Estate of David Rodriguez, et al., vs. Rose Rock Midstream Field Services, LLC, SemGroup Corporation, Rose Rock Midstream, L.P. and SemManagement LLC, et al. Confidential settlement agreements have been entered into with all plaintiffs. There are pending claims with one defendant/cross-plaintiff for which a Motion for Summary Judgment has been filed, however, the hearing date has not been set. We believe that any liability that may arise from this action will be within the limits covered by our insurance. We will continue to defend our position, however we cannot predict the outcome. Other matters We are party to various other claims, legal actions and complaints arising in the ordinary course of business. In the opinion of our management, the ultimate resolution of these claims, legal actions and complaints, after consideration of amounts accrued, insurance coverage and other arrangements, will not have a material effect on our consolidated financial position, results of operations or cash flows. However, the outcome of such matters is inherently uncertain and estimates of our consolidated liabilities may change materially as circumstances develop. Asset retirement obligations We may be subject to removal and restoration costs upon retirement of our facilities. However, we are unable to predict when, or if, our pipelines, storage tanks and related facilities would become completely obsolete and require decommissioning. Accordingly, we have not recorded a liability or corresponding asset, as both the amount and timing of such potential future costs are indeterminable. Purchase and sale commitments We routinely enter into agreements to purchase and sell petroleum products at specified future dates. We create a margin for these purchases by entering into various types of physical and financial sales and exchange transactions through which we seek to maintain a position that is substantially balanced between purchases on the one hand and sales and future delivery obligations on the other. We account for derivatives at fair value with the exception of commitments which have been designated as normal purchases and sales, for which we do not record assets or liabilities related to these agreements until the product is purchased or sold. At June 30, 2016 , such commitments included the following (in thousands): Volume (Barrels) Value Fixed price purchases 3,528 $ 167,030 Fixed price sales 4,563 $ 218,212 Floating price purchases 12,701 $ 601,820 Floating price sales 15,613 $ 760,170 Certain of the commitments shown in the table above relate to agreements to purchase product from a counterparty and to sell a similar amount of product (in a different location) to the same counterparty. Many of the commitments shown in the table above are cancellable by either party, as long as notice is given within the time frame specified in the agreement, generally 30 to 120 days. We have a take-or-pay obligation with our equity method investee, White Cliffs, for approximately 5,000 barrels per day of space on White Cliffs' pipeline. The agreement became effective in October 2015 and has a term of 5 years . Annual payments to White Cliffs under the agreement are expected to be $9.4 million .

Partners' Capital and Distribut

Partners' Capital and Distributions	6 Months Ended
	Jun. 30, 2016
Partners' Capital [Abstract]
PARTNERS' CAPITAL AND DISTRIBUTIONS	PARTNERS’ CAPITAL AND DISTRIBUTIONS Unaudited condensed consolidated statement of changes in partners’ capital The following table shows the changes in our partners’ capital accounts from December 31, 2015 to June 30, 2016 (in thousands): Common Units - Public Common Units - SemGroup General Partner Interest Total Partners' Capital Balance at December 31, 2015 $ 80,829 $ 139,470 $ 9,906 $ 230,205 Net income 10,942 14,043 11,405 36,390 Unvested distribution equivalent rights 66 — — 66 Cash distributions to partners (21,485 ) (27,331 ) (11,884 ) (60,700 ) Non-cash equity compensation 731 — — 731 Balance at June 30, 2016 $ 71,083 $ 126,182 $ 9,427 $ 206,692 The following table shows the cash distributions paid or declared per common unit during 2016 and 2015 : Quarter Ended Record Date Payment Date Distribution Per Unit December 31, 2014 February 3, 2015 February 13, 2015 $0.6200 March 31, 2015 May 5, 2015 May 15, 2015 $0.6350 June 30, 2015 August 4, 2015 August 14, 2015 $0.6500 September 30, 2015 November 3, 2015 November 13, 2015 $0.6600 December 31, 2015 February 2, 2016 February 12, 2016 $0.6600 March 31, 2016 May 3, 2016 May 13, 2016 $0.6600 June 30, 2016 August 2, 2016 August 12, 2016 $0.6600 Equity incentive plan We granted 117,204 restricted unit awards during the six months ended June 30, 2016 , with a weighted average grant date fair value of $9.62 . At June 30, 2016 , there were 176,306 unvested restricted unit awards that have been granted pursuant to our equity incentive plan. During the six months ended June 30, 2016 , 39,344 restricted unit awards vested of which 254 were withheld to satisfy tax withholding obligations. The cost associated with the withheld awards is reflected in the condensed consolidated financial statements as a cash distribution to common public unitholders. The holders of these restricted unit awards are entitled to equivalent distributions (“UUDs”) to be received upon vesting of the restricted unit awards. The UUDs will be settled in cash upon vesting. At June 30, 2016 , the value of these UUDs related to unvested restricted units was approximately $315 thousand .

Earnings Per Limited Partner Un

Earnings Per Limited Partner Unit	6 Months Ended
	Jun. 30, 2016
Earnings Per Share [Abstract]
EARNINGS PER LIMITED PARTNER UNIT	EARNINGS PER LIMITED PARTNER UNIT Net income is allocated to the general partner and the limited partners in accordance with their respective partnership percentages, after giving effect to any priority income allocations, such as incentive distributions that are allocated to the general partner. Distributions pertaining to the current period are based on available cash as defined by our partnership agreement. After adjusting for the appropriate period’s distributions, the remaining undistributed earnings or excess distributions over earnings, if any, are allocated to the general partner, limited partners and participating securities in accordance with the contractual terms of the partnership agreement and as further prescribed under the two-class method. Incentive distribution rights do not participate in undistributed earnings. Basic and diluted earnings per limited partner unit is determined by dividing net income allocated to the limited partners by the weighted average number of limited partner units for such class outstanding during the period. Diluted earnings per limited partner unit reflects, where applicable, the potential dilution that could occur if securities or other agreements to issue additional units of a limited partner class, such as restricted unit awards, were exercised, settled or converted into such units. The following table sets forth the computation of basic and diluted earnings per limited partner unit for the three months and six months ended June 30, 2016 and 2015 (in thousands, except per unit data): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Net income attributable to Rose Rock Midstream, L.P. $ 9,922 $ 17,068 $ 36,390 $ 31,668 Less: General partner's incentive distribution earned 5,339 4,981 10,677 9,431 Less: General partner's 2.0% ownership 198 342 728 634 Net income allocated to limited partners $ 4,385 $ 11,745 $ 24,985 $ 21,603 Basic weighted average number of common units outstanding 36,838 36,790 36,823 35,803 Effect of non-vested restricted units 77 49 50 46 Diluted weighted average number of common units outstanding 36,915 36,839 36,873 35,849 Net income per limited partner unit: Common unit (basic) $ 0.12 $ 0.32 $ 0.68 $ 0.60 Common unit (diluted) $ 0.12 $ 0.32 $ 0.68 $ 0.60

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2016
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS Direct employee expenses We do not directly employ any persons to manage or operate our business. These functions are performed by employees of SemGroup. Allocations are based on the actual costs of employees operating Rose Rock, including employees added through growth and acquisitions. SemGroup charged us $12.0 million and $11.8 million during the three months ended June 30, 2016 and 2015 , respectively, for direct employee costs. SemGroup charged us $23.4 million and $22.1 million during the six months ended June 30, 2016 and 2015 , respectively, for direct employee costs. These expenses were recorded to operating expenses and general and administrative expenses in our condensed consolidated statements of income. Allocated expenses SemGroup incurs expenses to provide certain indirect corporate general and administrative services to its subsidiaries. Such expenses include employee compensation costs, professional fees and rental fees for office space, among other expenses. SemGroup charged us $2.9 million and $3.7 million during the three months ended June 30, 2016 and 2015 , respectively, for such allocated costs. SemGroup charged us $6.3 million and $6.3 million during the six months ended June 30, 2016 and 2015 , respectively, for such allocated costs. These expenses were recorded to general and administrative expenses in our condensed consolidated statements of income. Pending merger See Footnote 1 for discussion of pending merger with SemGroup. NGL Energy Partners LP SemGroup holds a general partner ownership interest in NGL Energy Partners LP ("NGL Energy"). We generated revenues from NGL Energy of $8.3 million and $72.1 million for the three months ended June 30, 2016 and 2015 , respectively. We made purchases of condensate at market prices from NGL Energy in the amount of $6.4 million and $75.0 million for the three months ended June 30, 2016 and 2015 , respectively. We received reimbursements from NGL Energy for support services in the amount of $14.0 thousand for the three months ended June 30, 2015 . We received no reimbursements from NGL Energy for support services for the three months ended June 30, 2016 . We generated revenues from NGL Energy of $16.8 million and $114.5 million for the six months ended June 30, 2016 and 2015 , respectively. We made purchases of condensate at market prices from NGL Energy in the amount of $13.2 million and $110.2 million for the six months ended June 30, 2016 and 2015 , respectively. We received reimbursements from NGL Energy for support services in the amount of $56.0 thousand for the six months ended June 30, 2015 . We received no reimbursements from NGL Energy for support services for the six months ended June 30, 2016 . SemGas, L.P. We purchase condensate at market prices from SemGas, L.P. ("SemGas"), which is a wholly-owned subsidiary of SemGroup. Purchases from SemGas were $2.5 million and $6.4 million for the three months ended June 30, 2016 and 2015 , respectively. Purchases from SemGas were $5.2 million and $12.4 million for the six months ended June 30, 2016 and 2015 , respectively. White Cliffs We generated storage revenues from our equity investee, White Cliffs, of $1.1 million and $1.1 million for the three months ended June 30, 2016 and 2015 , respectively. We generated storage revenues from White Cliffs of $2.2 million and $2.1 million for the six months ended June 30, 2016 and 2015 , respectively. We incurred $2.7 million and $1.1 million of costs for the three months months ended June 30, 2016 and 2015 , respectively, related to transportation fees for shipments on the White Cliffs. We incurred $5.2 million and $1.8 million of costs for the six months ended June 30, 2016 and 2015 , respectively, related to transportation fees for shipments on the White Cliffs. We received $0.1 million and $0.1 million in management fees from White Cliffs for the three months ended June 30, 2016 and 2015 , respectively. We received $0.2 million and $0.2 million in management fees from White Cliffs for the six months ended June 30, 2016 and 2015 , respectively. During the three and six months ended June 30, 2016 , we purchased $3.5 million of crude oil from White Cliffs. There were no product purchases from White Cliffs in the prior year. Glass Mountain We incurred $1.4 million and $0.7 million of costs for the three months ended June 30, 2016 and 2015 , respectively, related to transportation fees for shipments on Glass Mountain's pipeline. We incurred $3.3 million and $1.2 million of costs for the six months ended June 30, 2016 and 2015 , respectively, related to transportation fees for shipments on Glass Mountain's pipeline. We received $0.2 million and $0.2 million in fees from Glass Mountain for the three months ended June 30, 2016 and 2015 , respectively, related to support services associated with Glass Mountain's pipeline operations. We received $0.4 million and $0.4 million in fees from Glass Mountain for the six months ended June 30, 2016 and 2015 , respectively, related to support services associated with Glass Mountain's pipeline operations. We made purchases of crude oil of $0.4 million and $1.5 million from Glass Mountain during the six months ended June 30, 2016 and 2015, respectively. There were no purchases of crude oil from Glass Mountain during the three months ended June 30, 2016 and 2015 . Legal services The law firm of Conner & Winters, LLP, of which Mark D. Berman is a partner, performs legal services for us. Mr. Berman is the spouse of Candice L. Cheeseman, our general partner's Vice President and General Counsel. Mr. Berman does not perform any legal services for us. We paid $127.7 thousand and $4.1 thousand in legal fees and related expenses to this law firm during the three months ended June 30, 2016 and 2015 , respectively. We paid $186.7 thousand and $4.1 thousand in legal fees and related expenses to this law firm during the six months ended June 30, 2016 and 2015 , respectively. Our equity method investee, White Cliffs, paid legal fees and related expenses to this law firm of $0.1 thousand and $0.1 thousand for the three months ended June 30, 2016 and 2015 . White Cliffs paid legal fees and related expenses to this law firm of $1.6 thousand and $3.4 thousand during the six months ended June 30, 2016 and 2015 , respectively.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information Supplemental Cash Flow Information	6 Months Ended
	Jun. 30, 2016
Other Significant Noncash Transactions [Line Items]
Cash Flow, Supplemental Disclosures [Text Block]	SUPPLEMENTAL CASH FLOW INFORMATION Acquisitions In connection with the first quarter 2015 acquisition of the WOT and a 50% interest in Glass Mountain (Note 3), we issued 1.75 million common units valued at $70.6 million as non-cash consideration to SemGroup. The valuation of the units is based on the offering price for units concurrently sold in a public offering. In addition, a non-cash contribution of $3.3 million was recorded to the general partner's capital account. As the transaction occurred between parties under common control, the purchase price in excess of SemGroup's historical cost was treated as an equity transaction with SemGroup, which reduced the partners' capital accounts pro-rata based on ownership percentages. The $46.3 million of cash consideration in excess of historical cost is reflected as a distribution to SemGroup in the condensed consolidated cash flow statement. The entire amount of non-cash equity consideration was in excess of the historical cost and was reduced to zero value in the statement of equity. Other supplemental disclosures We paid cash interest of $22.4 million and $15.8 million for the six months ended June 30, 2016 and 2015 , respectively. We accrued $0.9 million and $9.1 million for purchases of property, plant and equipment for the six months ended June 30, 2016 and 2015 , respectively.

Overview (Policies)

Overview (Policies)	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	OVERVIEW Rose Rock Midstream, L.P. is a Delaware limited partnership. The general partner of Rose Rock Midstream, L.P. is Rose Rock Midstream GP, LLC, which is a wholly-owned subsidiary of SemGroup Corporation. SemGroup Corporation is a Delaware corporation headquartered in Tulsa, Oklahoma that provides diversified midstream services to the energy industry. The terms "we," "our," "us," "Rose Rock," the "Partnership" and similar language used in these notes to the unaudited condensed consolidated financial statements refer to Rose Rock Midstream, L.P, and its subsidiaries. The term "SemGroup" refers to SemGroup Corporation and its controlled subsidiaries, including Rose Rock Midstream GP, LLC. Basis of presentation These condensed consolidated financial statements include the accounts of Rose Rock Midstream, L.P. and its controlled subsidiaries. The condensed consolidated balance sheet at December 31, 2015 , which is derived from audited financial statements and the unaudited condensed consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") and the rules and regulations of the SEC. These condensed consolidated financial statements include all normal and recurring adjustments that, in the opinion of management, are necessary to present fairly the financial position of the Partnership and the results of its operations and its cash flows. All significant transactions between Rose Rock Midstream, L.P. and its consolidated subsidiaries have been eliminated. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts and disclosures in the financial statements. Although management believes these estimates are reasonable, actual results could differ materially from these estimates. The results of operations for the three months and six months ended June 30, 2016 , are not necessarily indicative of the results to be expected for the full year ending December 31, 2016 . Pursuant to the rules and regulations of the SEC, the accompanying condensed consolidated financial statements do not include all of the information and notes normally included with financial statements prepared in accordance with U.S. GAAP. Certain reclassifications have been made to conform previously reported balances to the current presentation. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2015, which are included in our Annual Report on Form 10-K for the year ended December 31, 2015 , filed with the SEC. Our significant accounting policies are consistent with those described in Note 2 of our Annual Report on Form 10-K for the year ended December 31, 2015. Pending merger On May 30, 2016, Rose Rock entered into an Agreement and Plan of Merger (the "Merger Agreement") with SemGroup whereby SemGroup would acquire the outstanding common limited partner units of Rose Rock not already beneficially owned by SemGroup in exchange for shares of SemGroup Class A common stock. Each common limited partner unit of Rose Rock would be acquired in exchange for 0.8136 shares of SemGroup Class A common stock. Completion of the merger is conditioned upon, among other things: (i) majority approval of Rose Rock common unitholders; (ii) all material required governmental consents and approvals having been received; (iii) the absence of legal injunctions or impediments prohibiting the transactions contemplated by the Merger Agreement; (iv) the effectiveness of a registration statement on Form S-4 with respect to the issuance of SemGroup stock to be issued in exchange for Rose Rock common limited partner units; (v) approval of the listing on the New York Stock Exchange, subject to official notice of issuance, of the SemGroup Class A common stock to be issued; and (vi) majority approval by SemGroup stockholders of the SemGroup Class A common stock issuance. A subsidiary of SemGroup which beneficially owns a majority of Rose Rock's common units has agreed to deliver a written consent approving the Merger Agreement and the transactions contemplated by such agreement. The Merger Agreement provides for certain termination rights for Rose Rock. The Merger Agreement provides that upon termination of the Merger Agreement (i) in connection with the failure of the stockholders of SemGroup to approve the SemGroup stock issuance, SemGroup will pay Rose Rock's out-of-pocket expenses in an amount up to $3.8 million and (ii) in connection with a change by SemGroup of its recommendation in favor of approval of the SemGroup stock issuance under certain circumstances, SemGroup will pay to Rose Rock a termination fee in the amount of $15.5 million . Under no circumstance will SemGroup be required to both reimburse Rose Rock's expenses and pay Rose Rock the termination fee. Recent accounting pronouncements In June 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments", which introduces new guidance for estimating credit losses on certain types of financial instruments based on expected losses and the timing of the recognition of such losses. For public entities, this ASU is effective for annual periods beginning after December 15, 2019, and interim periods within those years and early adoption is permitted in the year prior to the effective date. We will adopt this guidance in the first quarter of 2020. The impact is not expected to be material. In March 2016, the FASB issued ASU 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting'', which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. For public entities, this ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those years and early adoption is permitted. The Company will adopt this guidance in the first quarter of 2017. The impact is not expected to be material. In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)", which amends the existing lease guidance to require lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by operating and finance leases and to disclose additional quantitative and qualitative information about leasing arrangements. This ASU also provides clarifications surrounding the presentation of the effects of leases in the income statement and statement of cash flows. For public entities, this ASU will be effective for annual periods beginning after December 15, 2018, and interim periods within those years. The new guidance shall be applied using a modified retrospective approach and early adoption is permitted. We are currently evaluating the impact of the adoption of ASU 2016-02 on our consolidated financial statements. We will adopt this guidance in the first quarter of 2019. In July 2015, the FASB issued ASU 2015-11, "Inventory (Topic 330): Simplifying the Measurement of Inventory", which requires that inventory within the scope of the guidance be measured at the lower of cost and net realizable value rather than the lower of cost or market. The standard will be effective for public business entities for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The new guidance shall be applied prospectively and early adoption is permitted. We will adopt this guidance in the first quarter of 2017. The impact is not expected to be material. On April 7, 2015, the FASB issued ASU 2015-03, “Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs”, which is designed to simplify presentation of debt issuance costs. The standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. In August 2015, the FASB issued ASU 2015-15, “Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements - Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting”, which amended the SEC paragraphs of ASC Subtopic 835-30 to include the language from the SEC Staff Announcement indicating that the SEC would not object to presenting deferred debt issuance costs related to line-of-credit agreements as assets and subsequently amortizing the deferred debt issuance costs ratably over the term of the agreement. The standards are effective for U.S. public companies for annual reporting periods beginning after December 15, 2015. The new guidance has been applied on a retrospective basis for all periods presented. We adopted this guidance in the first quarter of 2016. The impact was not material. For presentation purposes, $12.2 million of debt issuance costs which had previously been reported as other noncurrent assets were reclassified as a reduction of long-term debt on the December 31, 2015 balance sheet. Capitalized loan fees related to our revolving credit facility continue to be presented as other noncurrent assets. In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers", which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP. The standard permits using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). In August 2015, the FASB issued ASU 2015-14 which deferred the effective date of ASU 2014-09 by one year. In March 2016, the FASB issued ASU 2016-08 which amended the principal-versus-agent implementation guidance set forth in ASU 2014-09. Among other things, ASU 2016-08 clarifies that an entity should evaluate whether it is the principal or the agent for each specified good or service promised in a contract with a customer. In April 2016, the FASB issued ASU 2016-10 which amended certain aspects of the guidance related to identifying performance obligations and licensing implementation within ASU 2014-09. In June 2016, the FASB issued ASU 2016-12 which narrows the scope around certain aspects of the criterion used in determining when to recognize revenue. We are currently evaluating the impact of our pending adoption of ASU 2014-09 on our consolidated financial statements and have not yet determined the method by which we will adopt the standard. We will adopt this guidance in the first quarter of 2018.
Consolidation, Policy [Policy Text Block]	Basis of presentation These condensed consolidated financial statements include the accounts of Rose Rock Midstream, L.P. and its controlled subsidiaries. The condensed consolidated balance sheet at December 31, 2015 , which is derived from audited financial statements and the unaudited condensed consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") and the rules and regulations of the SEC. These condensed consolidated financial statements include all normal and recurring adjustments that, in the opinion of management, are necessary to present fairly the financial position of the Partnership and the results of its operations and its cash flows. All significant transactions between Rose Rock Midstream, L.P. and its consolidated subsidiaries have been eliminated. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts and disclosures in the financial statements. Although management believes these estimates are reasonable, actual results could differ materially from these estimates. The results of operations for the three months and six months ended June 30, 2016 , are not necessarily indicative of the results to be expected for the full year ending December 31, 2016 . Pursuant to the rules and regulations of the SEC, the accompanying condensed consolidated financial statements do not include all of the information and notes normally included with financial statements prepared in accordance with U.S. GAAP. Certain reclassifications have been made to conform previously reported balances to the current presentation. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2015, which are included in our Annual Report on Form 10-K for the year ended December 31, 2015 , filed with the SEC. Our significant accounting policies are consistent with those described in Note 2 of our Annual Report on Form 10-K for the year ended December 31, 2015.
Description of New Accounting Pronouncements Not yet Adopted [Text Block]	Recent accounting pronouncements In June 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments", which introduces new guidance for estimating credit losses on certain types of financial instruments based on expected losses and the timing of the recognition of such losses. For public entities, this ASU is effective for annual periods beginning after December 15, 2019, and interim periods within those years and early adoption is permitted in the year prior to the effective date. We will adopt this guidance in the first quarter of 2020. The impact is not expected to be material. In March 2016, the FASB issued ASU 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting'', which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. For public entities, this ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those years and early adoption is permitted. The Company will adopt this guidance in the first quarter of 2017. The impact is not expected to be material. In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)", which amends the existing lease guidance to require lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by operating and finance leases and to disclose additional quantitative and qualitative information about leasing arrangements. This ASU also provides clarifications surrounding the presentation of the effects of leases in the income statement and statement of cash flows. For public entities, this ASU will be effective for annual periods beginning after December 15, 2018, and interim periods within those years. The new guidance shall be applied using a modified retrospective approach and early adoption is permitted. We are currently evaluating the impact of the adoption of ASU 2016-02 on our consolidated financial statements. We will adopt this guidance in the first quarter of 2019. In July 2015, the FASB issued ASU 2015-11, "Inventory (Topic 330): Simplifying the Measurement of Inventory", which requires that inventory within the scope of the guidance be measured at the lower of cost and net realizable value rather than the lower of cost or market. The standard will be effective for public business entities for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The new guidance shall be applied prospectively and early adoption is permitted. We will adopt this guidance in the first quarter of 2017. The impact is not expected to be material. On April 7, 2015, the FASB issued ASU 2015-03, “Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs”, which is designed to simplify presentation of debt issuance costs. The standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. In August 2015, the FASB issued ASU 2015-15, “Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements - Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting”, which amended the SEC paragraphs of ASC Subtopic 835-30 to include the language from the SEC Staff Announcement indicating that the SEC would not object to presenting deferred debt issuance costs related to line-of-credit agreements as assets and subsequently amortizing the deferred debt issuance costs ratably over the term of the agreement. The standards are effective for U.S. public companies for annual reporting periods beginning after December 15, 2015. The new guidance has been applied on a retrospective basis for all periods presented. We adopted this guidance in the first quarter of 2016. The impact was not material. For presentation purposes, $12.2 million of debt issuance costs which had previously been reported as other noncurrent assets were reclassified as a reduction of long-term debt on the December 31, 2015 balance sheet. Capitalized loan fees related to our revolving credit facility continue to be presented as other noncurrent assets. In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers", which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP. The standard permits using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). In August 2015, the FASB issued ASU 2015-14 which deferred the effective date of ASU 2014-09 by one year. In March 2016, the FASB issued ASU 2016-08 which amended the principal-versus-agent implementation guidance set forth in ASU 2014-09. Among other things, ASU 2016-08 clarifies that an entity should evaluate whether it is the principal or the agent for each specified good or service promised in a contract with a customer. In April 2016, the FASB issued ASU 2016-10 which amended certain aspects of the guidance related to identifying performance obligations and licensing implementation within ASU 2014-09. In June 2016, the FASB issued ASU 2016-12 which narrows the scope around certain aspects of the criterion used in determining when to recognize revenue. We are currently evaluating the impact of our pending adoption of ASU 2014-09 on our consolidated financial statements and have not yet determined the method by which we will adopt the standard. We will adopt this guidance in the first quarter of 2018.

Financial Instruments (Policies

Financial Instruments (Policies)	6 Months Ended
	Jun. 30, 2016
Financial Instruments And Fair Value Disclosures [Abstract]
Fair Value Measurement, Policy [Policy Text Block]	"Level 1" measurements are based on inputs consisting of unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. These include commodity futures contracts that are traded on an exchange. "Level 2" measurements are based on inputs consisting of market observable and corroborated prices for similar derivative contracts. Assets and liabilities classified as Level 2 include OTC traded physical fixed priced purchases and sales forward contracts. "Level 3" measurements are based on inputs from a pricing service and/or internal valuation models incorporating observable and unobservable market data. Financial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the measurement requires judgment and may affect the valuation of assets and liabilities and their placement within the fair value levels. At June 30, 2016 , all of our physical fixed price forward purchases and sales contracts were being accounted for as normal purchases and normal sales.

Equity Method Investment (Table

Equity Method Investment (Tables)	6 Months Ended
	Jun. 30, 2016
Schedule of Equity Method Investments [Line Items]
Equity Method Investments [Table Text Block]	Our equity method investments consisted of the following (in thousands): June 30, 2016 December 31, 2015 White Cliffs Pipeline, L.L.C. $ 290,668 $ 297,109 Glass Mountain Pipeline, LLC 137,293 141,182 Total equity method investments $ 427,961 $ 438,291
Earnings from Equity Method Investments [Table Text Block]	Our earnings from equity method investments consisted of the following (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 White Cliffs Pipeline, L.L.C. $ 16,428 $ 15,545 $ 36,208 $ 34,635 Glass Mountain Pipeline, LLC 650 2,138 1,709 3,912 Total earnings from equity method investments $ 17,078 $ 17,683 $ 37,917 $ 38,547
Cash distributions received from equity method investments [Table Text Block]	Cash distributions received from equity method investments consisted of the following (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 White Cliffs Pipeline, L.L.C. $ 21,664 $ 20,551 $ 45,762 $ 44,705 Glass Mountain Pipeline, LLC 3,118 5,009 5,933 6,920 Total cash distributions received from equity method investments $ 24,782 $ 25,560 $ 51,695 $ 51,625
White Cliffs Pipeline L L C [Member]
Schedule of Equity Method Investments [Line Items]
Schedule of Income Statement Information on Equity Method Investments [Table Text Block]	Certain unaudited summarized income statement information of White Cliffs Pipeline, L.L.C. ("White Cliffs") for the three months and six months ended June 30, 2016 and 2015 is shown below (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Revenues $ 55,586 $ 48,509 $ 113,642 $ 103,123 Cost of products sold $ 2,803 $ 169 $ 3,053 $ 1,102 Operating, general and administrative expenses $ 10,125 $ 8,876 $ 19,727 $ 16,296 Depreciation and amortization expense $ 10,084 $ 8,587 $ 19,047 $ 17,125 Net income $ 32,575 $ 30,870 $ 71,822 $ 68,593
Glass Mountain Pipeline Llc [Member]
Schedule of Equity Method Investments [Line Items]
Schedule of Income Statement Information on Equity Method Investments [Table Text Block]	Certain summarized unaudited income statement information of Glass Mountain for the three months and six months ended June 30, 2016 and 2015 is shown below (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Revenues $ 6,898 $ 9,788 $ 15,470 $ 20,909 Cost of sales $ (120 ) $ (40 ) $ 445 $ 1,974 Operating, general and administrative expenses $ 1,618 $ 1,513 $ 3,463 $ 2,920 Depreciation and amortization expense $ 3,989 $ 3,932 $ 7,925 $ 7,976 Net income $ 1,407 $ 4,381 $ 3,632 $ 8,036

Segments (Tables)

Segments (Tables)	6 Months Ended
	Jun. 30, 2016
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Three months ended June 30, 2016 Transportation Facilities Supply and Logistics Corporate and Other Consolidated Revenues: External $ 15,644 $ 10,299 $ 143,201 $ — $ 169,144 Intersegment 5,127 2,527 — (7,654 ) — Total revenues $ 20,771 $ 12,826 $ 143,201 $ (7,654 ) $ 169,144 Depreciation and amortization $ 6,171 $ 1,921 $ 40 $ 103 $ 8,235 Earnings from equity method investment $ 17,078 $ — $ — $ — $ 17,078 Segment profit (1) $ 18,421 $ 9,371 $ 10,069 $ (2,793 ) $ 35,068 Three months ended June 30, 2015 Transportation Facilities Supply and Logistics Corporate and Other Consolidated Revenues: External $ 22,425 $ 11,402 $ 189,476 $ — $ 223,303 Intersegment 3,562 — — (3,562 ) — Total revenues $ 25,987 $ 11,402 $ 189,476 $ (3,562 ) $ 223,303 Depreciation and amortization $ 9,038 $ 1,406 $ 40 $ 124 $ 10,608 Earnings from equity method investment $ 17,683 $ — $ — $ — $ 17,683 Segment profit (1) $ 19,984 $ 7,963 $ 10,978 $ (2,472 ) $ 36,453 Six Months Ended June 30, 2016 Transportation Facilities Supply and Logistics Corporate and Other Consolidated Revenues: External $ 32,839 $ 20,433 $ 319,823 $ — $ 373,095 Intersegment 12,341 5,272 — (17,613 ) — Total revenues $ 45,180 $ 25,705 $ 319,823 $ (17,613 ) $ 373,095 Depreciation and amortization $ 12,030 $ 3,805 $ 80 $ 213 $ 16,128 Earnings from equity method investment $ 37,917 $ — $ — $ — $ 37,917 Segment profit (1) $ 44,013 $ 18,958 $ 19,162 $ (4,815 ) $ 77,318 Total assets at June 30, 2016 (excluding intersegment receivables) $ 739,904 $ 154,359 $ 430,297 $ 12,868 $ 1,337,428 Equity investments at June 30, 2016 $ 427,961 $ — $ — $ — $ 427,961 Six Months Ended June 30, 2015 Transportation Facilities Supply and Logistics Corporate and Other Consolidated Revenues: External $ 42,752 $ 22,807 $ 292,437 $ — $ 357,996 Intersegment 7,283 — — (7,283 ) — Total revenues $ 50,035 $ 22,807 $ 292,437 $ (7,283 ) $ 357,996 Depreciation and amortization $ 17,656 $ 2,775 $ 79 $ 241 $ 20,751 Earnings from equity method investment $ 38,547 $ — $ — $ — $ 38,547 Segment profit (1) $ 44,508 $ 16,365 $ 16,159 $ (5,299 ) $ 71,733 Total assets at December 31, 2015 (excluding intersegment receivables) $ 745,612 $ 155,186 $ 328,419 $ 16,373 $ 1,245,590 Equity investments at December 31, 2015 $ 438,291 $ — $ — $ — $ 438,291 (1) Segment profit represents revenues excluding unrealized gains (losses) related to derivative instruments plus earnings from equity method investments less cost of sales excluding depreciation and amortization and less operating and general and administrative expenses. Three Months Ended June 30, Six Months Ended June 30, Reconciliation of segment profit to net income: 2016 2015 2016 2015 Total segment profit $ 35,068 $ 36,453 $ 77,318 $ 71,733 Less: Net unrealized loss (gain) related to derivative instruments 4,477 (1,415 ) (71 ) 1,116 Depreciation and amortization 8,235 10,608 16,128 20,751 Interest expense 12,434 10,197 24,871 18,203 Other income — (5 ) — (5 ) Net income $ 9,922 $ 17,068 $ 36,390 $ 31,668

Financial Instruments (Tables)

Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2016
Financial Instruments And Fair Value Disclosures [Abstract]
Summarized balance of assets and liabilities	The table below summarizes the balances of these assets and liabilities at June 30, 2016 and December 31, 2015 (in thousands): June 30, 2016 December 31, 2015 Level 1 Netting* Total Level 1 Netting* Total Assets $ 1,160 $ (1,160 ) $ — $ 131 $ (131 ) $ — Liabilities $ 1,428 $ (1,160 ) $ 268 $ 470 $ (131 ) $ 339 * Relates primarily to exchange traded futures. Gain and loss positions on multiple contracts are settled net on a daily basis with the exchange.
Notional quantities for commodity derivative instruments	The following table sets forth the notional quantities for commodity derivative instruments entered into during the periods indicated (in thousands of barrels): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Sales 5,890 7,721 16,310 13,452 Purchases 5,743 7,508 16,253 13,413
Fair value of commodity derivative assets and liabilities	The fair value of our commodity derivative assets and liabilities recorded to other current assets and other current liabilities was as follows (in thousands): June 30, 2016 December 31, 2015 Assets Liabilities Assets Liabilities Commodity contracts $ — $ 268 $ — $ 339
Realized and unrealized gains from commodity derivatives	Realized and unrealized gains (losses) from our commodity derivatives were recorded to product revenue in the following amounts (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Commodity contracts $ (7,127 ) $ (2,202 ) $ (3,773 ) $ (2,846 )

Long Term Debt Long Term Debt (

Long Term Debt Long Term Debt (Tables)	6 Months Ended
	Jun. 30, 2016
Debt Instrument [Line Items]
Schedule of Long-term Debt Instruments [Table Text Block]	Our long-term debt consisted of the following (in thousands): June 30, December 31, 5.625% senior unsecured notes due 2022 $ 400,000 $ 400,000 Unamortized debt issuance costs on 2022 notes (6,442 ) (6,975 ) 5.625% senior unsecured notes due 2022, net 393,558 393,025 5.625% senior unsecured notes due 2023 350,000 350,000 Unamortized discount on 2023 notes (5,178 ) (5,455 ) Unamortized debt issuance costs on 2023 notes (4,931 ) (5,266 ) 5.625% senior unsecured notes due 2023, net 339,891 339,279 Revolving credit facility 41,000 — Capital leases 64 83 Total long-term debt, net 774,513 732,387 Less: current portion of long-term debt 25 31 Noncurrent portion of long-term debt, net $ 774,488 $ 732,356

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Purchase and sale commitments	We account for derivatives at fair value with the exception of commitments which have been designated as normal purchases and sales, for which we do not record assets or liabilities related to these agreements until the product is purchased or sold. At June 30, 2016 , such commitments included the following (in thousands): Volume (Barrels) Value Fixed price purchases 3,528 $ 167,030 Fixed price sales 4,563 $ 218,212 Floating price purchases 12,701 $ 601,820 Floating price sales 15,613 $ 760,170

Partners' Capital and Distrib24

Partners' Capital and Distributions (Tables)	6 Months Ended
	Jun. 30, 2016
Partners' Capital [Abstract]
Changes in partners' capital	The following table shows the changes in our partners’ capital accounts from December 31, 2015 to June 30, 2016 (in thousands): Common Units - Public Common Units - SemGroup General Partner Interest Total Partners' Capital Balance at December 31, 2015 $ 80,829 $ 139,470 $ 9,906 $ 230,205 Net income 10,942 14,043 11,405 36,390 Unvested distribution equivalent rights 66 — — 66 Cash distributions to partners (21,485 ) (27,331 ) (11,884 ) (60,700 ) Non-cash equity compensation 731 — — 731 Balance at June 30, 2016 $ 71,083 $ 126,182 $ 9,427 $ 206,692
Distributions paid or declared	The following table shows the cash distributions paid or declared per common unit during 2016 and 2015 : Quarter Ended Record Date Payment Date Distribution Per Unit December 31, 2014 February 3, 2015 February 13, 2015 $0.6200 March 31, 2015 May 5, 2015 May 15, 2015 $0.6350 June 30, 2015 August 4, 2015 August 14, 2015 $0.6500 September 30, 2015 November 3, 2015 November 13, 2015 $0.6600 December 31, 2015 February 2, 2016 February 12, 2016 $0.6600 March 31, 2016 May 3, 2016 May 13, 2016 $0.6600 June 30, 2016 August 2, 2016 August 12, 2016 $0.6600

Earnings Per Limited Partner 25

Earnings Per Limited Partner Unit (Tables)	6 Months Ended
	Jun. 30, 2016
Earnings Per Share [Abstract]
Computation of basic and diluted earnings per unit	The following table sets forth the computation of basic and diluted earnings per limited partner unit for the three months and six months ended June 30, 2016 and 2015 (in thousands, except per unit data): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Net income attributable to Rose Rock Midstream, L.P. $ 9,922 $ 17,068 $ 36,390 $ 31,668 Less: General partner's incentive distribution earned 5,339 4,981 10,677 9,431 Less: General partner's 2.0% ownership 198 342 728 634 Net income allocated to limited partners $ 4,385 $ 11,745 $ 24,985 $ 21,603 Basic weighted average number of common units outstanding 36,838 36,790 36,823 35,803 Effect of non-vested restricted units 77 49 50 46 Diluted weighted average number of common units outstanding 36,915 36,839 36,873 35,849 Net income per limited partner unit: Common unit (basic) $ 0.12 $ 0.32 $ 0.68 $ 0.60 Common unit (diluted) $ 0.12 $ 0.32 $ 0.68 $ 0.60

Overview (Details)

Overview (Details)	May 30, 2016USD ($)	Dec. 31, 2015USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unamortized Debt Issuance Expense		$ 12,200,000
SemGroup Merger Agreement [Member]
Overview (Textual) [Abstract]
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable,Unit for Unit Exchange Ratio	0.8136
Transaction related costs	$ 3,800,000
Merger termination contingent fee	$ 15,500,000

Equity Method Investment - Bala

Equity Method Investment - Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 427,961	$ 438,291
White Cliffs Pipeline L L C [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	290,668	297,109
Glass Mountain Pipeline Llc [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 137,293	$ 141,182

Equity Method Investment - Equi

Equity Method Investment - Equity Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	$ 17,078	$ 17,683	$ 37,917	$ 38,547
White Cliffs Pipeline L L C [Member]
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	16,428	15,545	36,208	34,635
Glass Mountain Pipeline Llc [Member]
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	$ 650	$ 2,138	$ 1,709	$ 3,912

Equity Method Investment - Dist

Equity Method Investment - Distributions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of and Return on Capital	$ 24,782	$ 25,560	$ 51,695	$ 51,625
White Cliffs Pipeline L L C [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of and Return on Capital	21,664	20,551	45,762	44,705
Glass Mountain Pipeline Llc [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of and Return on Capital	$ 3,118	$ 5,009	$ 5,933	$ 6,920

Equity Method Investment - Summ

Equity Method Investment - Summarized Financial Information - White Cliffs (Details) - White Cliffs Pipeline L L C [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Revenue	$ 55,586	$ 48,509	$ 113,642	$ 103,123
Equity Method Investment, Summarized Financial Information, Cost of Sales	2,803	169	3,053	1,102
Equity Method Investment, Summarized Financial Information, Operating, General and Administrative Expenses	10,125	8,876	19,727	16,296
Equity Method Investment, Summarized Financial Information, Depreciation and Amortization Expense	10,084	8,587	19,047	17,125
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	$ 32,575	$ 30,870	$ 71,822	$ 68,593

Equity Method Investment - Su31

Equity Method Investment - Summarized Financial Information - Glass Mountain (Details) - Glass Mountain Pipeline Llc [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Revenue	$ 6,898	$ 9,788	$ 15,470	$ 20,909
Equity Method Investment, Summarized Financial Information, Cost of Sales	(120)	(40)	445	1,974
Equity Method Investment, Summarized Financial Information, Operating, General and Administrative Expenses	1,618	1,513	3,463	2,920
Equity Method Investment, Summarized Financial Information, Depreciation and Amortization Expense	3,989	3,932	7,925	7,976
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	$ 1,407	$ 4,381	$ 3,632	$ 8,036

Equity Method Investment (Detai

Equity Method Investment (Details Textual) bbl in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)bbl	Jun. 30, 2015USD ($)
Schedule of Equity Method Investments [Line Items]
General and administrative expense	$ 5,428	$ 6,329	$ 10,328	$ 11,949
White Cliffs Pipeline L L C [Member]
Schedule of Equity Method Investments [Line Items]
General and administrative expense	$ 400	$ 400	$ 900	$ 700
Glass Mountain Pipeline Llc [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%		50.00%
Partners' Capital Account, Contributions			$ 300
White Cliffs Pipeline L L C [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	51.00%		51.00%
Pipeline expansion [Member] | White Cliffs Pipeline L L C [Member]
Schedule of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions			$ 2,200
Incremental capacity expected to be added | bbl			65

Acquisitions (Details Textual)

Acquisitions (Details Textual) shares in Thousands, bbl in Thousands, $ in Millions	Feb. 13, 2015USD ($)shares	Jun. 30, 2016inmibbl	Jun. 30, 2015shares
Business Acquisition [Line Items]
Percentage of ownership general partner interest		2.00%	2.00%
Wattenberg Oil Trunkline [Member]
Business Acquisition [Line Items]
Width of Pipeline | in		12
Pipeline capacity | bbl		85
Length Of Pipeline Network | mi		75
Glass Mountain Pipeline Llc [Member]
Business Acquisition [Line Items]
Length Of Pipeline Network | mi		215
Glass Mountain Pipeline Llc [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage		50.00%
Common Units [Member]
Business Acquisition [Line Items]
Partners' Capital Account, Units, Sold in Public Offering | shares			2,300
Common Units [Member] | Wattenberg Oil Trunkline and Glass Mountain Pipeline [Member]
Business Acquisition [Line Items]
Units issued as consideration in acquisition | shares	1,750
Semgroup [Member] | Wattenberg Oil Trunkline and Glass Mountain Pipeline [Member]
Business Acquisition [Line Items]
Payments to acquire business | $	$ 251.2

Segments (Details)

Segments (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues		$ 169,144	$ 223,303	$ 373,095	$ 357,996
Depreciation and amortization		8,235	10,608	16,128	20,751
Income (Loss) from Equity Method Investments		17,078	17,683	37,917	38,547
Segment profit	[1]	35,068	36,453	77,318	71,733
Assets		1,337,428		1,337,428		$ 1,245,590
Equity method investments		427,961		427,961		438,291
Unrealized Gain (Loss) on Derivatives		4,477	(1,415)	(71)	1,116
Interest Expense		12,434	10,197	24,871	18,203
Other income		0	(5)	0	(5)
Net income		9,922	17,068	36,390	31,668
Transportation [Member]
Segment Reporting Information [Line Items]
Revenues		20,771	25,987	45,180	50,035
Depreciation and amortization		6,171	9,038	12,030	17,656
Income (Loss) from Equity Method Investments		17,078	17,683	37,917	38,547
Segment profit	[1]	18,421	19,984	44,013	44,508
Assets		739,904		739,904		745,612
Equity method investments		427,961		427,961		438,291
Facilities [Member]
Segment Reporting Information [Line Items]
Revenues		12,826	11,402	25,705	22,807
Depreciation and amortization		1,921	1,406	3,805	2,775
Income (Loss) from Equity Method Investments		0	0	0	0
Segment profit	[1]	9,371	7,963	18,958	16,365
Assets		154,359		154,359		155,186
Equity method investments		0		0		0
Supply and logistics [Member]
Segment Reporting Information [Line Items]
Revenues		143,201	189,476	319,823	292,437
Depreciation and amortization		40	40	80	79
Income (Loss) from Equity Method Investments		0	0	0	0
Segment profit	[1]	10,069	10,978	19,162	16,159
Assets		430,297		430,297		328,419
Equity method investments		0		0		0
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Revenues		(7,654)	(3,562)	(17,613)	(7,283)
Depreciation and amortization		103	124	213	241
Income (Loss) from Equity Method Investments		0	0	0	0
Segment profit	[1]	(2,793)	(2,472)	(4,815)	(5,299)
Assets		12,868		12,868		16,373
Equity method investments		0		0		$ 0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		169,144	223,303	373,095	357,996
Operating Segments [Member] | Transportation [Member]
Segment Reporting Information [Line Items]
Revenues		15,644	22,425	32,839	42,752
Operating Segments [Member] | Facilities [Member]
Segment Reporting Information [Line Items]
Revenues		10,299	11,402	20,433	22,807
Operating Segments [Member] | Supply and logistics [Member]
Segment Reporting Information [Line Items]
Revenues		143,201	189,476	319,823	292,437
Operating Segments [Member] | Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Revenues		0	0	0	0
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues		0	0	0	0
Intersegment Eliminations [Member] | Transportation [Member]
Segment Reporting Information [Line Items]
Revenues		5,127	3,562	12,341	7,283
Intersegment Eliminations [Member] | Facilities [Member]
Segment Reporting Information [Line Items]
Revenues		2,527	0	5,272	0
Intersegment Eliminations [Member] | Supply and logistics [Member]
Segment Reporting Information [Line Items]
Revenues		0	0	0	0
Intersegment Eliminations [Member] | Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Revenues		$ (7,654)	$ (3,562)	$ (17,613)	$ (7,283)
[1]	(1) Segment profit represents revenues excluding unrealized gains (losses) related to derivative instruments plus earnings from equity method investments less cost of sales excluding depreciation and amortization and less operating and general and administrative expenses.

Financial Instruments - Summari

Financial Instruments - Summarized balance of assets and liabilities (Details) - Level 1 [Member] - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset		$ 1,160	$ 131
Derivative Asset, Fair Value, Gross Liability	[1]	(1,160)	(131)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		0	0
Derivative Liability, Fair Value, Gross Liability		1,428	470
Derivative Liability, Fair Value, Gross Asset	[1]	(1,160)	(131)
Liabilities		$ 268	$ 339
[1]	* Relates primarily to exchange traded futures. Gain and loss positions on multiple contracts are settled net on a daily basis with the exchange.

Financial Instruments - Level 2

Financial Instruments - Level 2 and 3 (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Level 2 and level 3 fair value transactions	$ 0	$ 0	$ 0	$ 0

Financial Instruments - Notiona

Financial Instruments - Notional amounts (Details) - bbl bbl in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Purchases [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	5,743	7,508	16,253	13,413
Sales [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	5,890	7,721	16,310	13,452

Financial Instruments - Fair va

Financial Instruments - Fair value of commodity derivative assets and liabilities (Details) - Not Designated as Hedging Instrument [Member] - Commodity Contract [Member] - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Assets [Member]
Fair value of commodity derivative assets and liabilities
Assets	$ 0	$ 0
Liabilities [Member]
Fair value of commodity derivative assets and liabilities
Liabilities	$ 268	$ 339

Financial Instruments - Realize

Financial Instruments - Realized and unrealized gains and losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Product revenue [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized and unrealized gains (losses) on commodity contracts	$ (7,127)	$ (2,202)	$ (3,773)	$ (2,846)

Financial Instruments (Details

Financial Instruments (Details Textual) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2016USD ($)Customer	Jun. 30, 2016USD ($)Customer	Dec. 31, 2015USD ($)
Offsetting Assets [Line Items]
Margin Deposit Assets | $	$ 5.1	$ 5.1	$ 2.9
Commodity Contract [Member]
Offsetting Assets [Line Items]
Derivative Asset, Fair Value, Amount Offset Against Collateral | $	$ 4.8	$ 4.8	$ 2.6
Cost of Goods, Total [Member] | Customer Concentration Risk [Member]
Offsetting Assets [Line Items]
Concentration Risk, Percentage	13.00%	14.00%
Purchases of product | $	$ 17.1	$ 39.5
Number of Suppliers | Customer	1	1
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Offsetting Assets [Line Items]
Concentration Risk, Percentage		51.00%
Supply and logistics [Member] | Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]
Offsetting Assets [Line Items]
Number of Customers | Customer	2	2
Supply and logistics [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Offsetting Assets [Line Items]
Number of Customers | Customer		2
Shell Trading Company [Member] | Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]
Offsetting Assets [Line Items]
Concentration Risk, Percentage	51.00%	53.00%
BP Oil Supply Company [Member] | Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]
Offsetting Assets [Line Items]
Concentration Risk, Percentage	14.00%	11.00%

Long Term Debt Long Term Debt41

Long Term Debt Long Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense		$ (12,200)
Long-term Line of Credit	$ 41,000	0
Capital Lease Obligations	64	83
Debt and Capital Lease Obligations	774,513	732,387
Long-term Debt and Capital Lease Obligations, Current	25	31
Long-term Debt and Capital Lease Obligations	774,488	732,356
Senior unsecured notes due 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	400,000	400,000
Unamortized Debt Issuance Expense	(6,442)	(6,975)
Senior Notes	393,558	393,025
Senior unsecured notes due 2023 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	350,000	350,000
Unamortized Debt Issuance Expense	(4,931)	(5,266)
Debt Instrument, Unamortized Discount	(5,178)	(5,455)
Senior Notes	$ 339,891	$ 339,279

Long Term Debt (Details Textual

Long Term Debt (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Outstanding borrowings	$ 41,000		$ 41,000		$ 0
Secured Bilateral [Member]
Debt Instrument [Line Items]
Interest rate	1.75%		1.75%
Outstanding letters of credit	$ 18,900		$ 18,900
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest Expense, Debt	1,600	$ 2,000	3,100	$ 4,200
Outstanding borrowings	41,000		41,000
Credit facility capacity, current	$ 585,000		$ 585,000
Interest rate	5.25%		5.25%
Senior Notes [Member] | Senior unsecured notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 400,000		$ 400,000
Debt Instrument, Interest Rate, Stated Percentage	5.625%		5.625%
Interest Expense, Debt	$ 5,900	5,900	$ 11,700	11,700
Senior Notes [Member] | Senior unsecured notes due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 350,000		$ 350,000
Debt Instrument, Interest Rate, Stated Percentage	5.625%		5.625%
Interest Expense, Debt	$ 5,200	$ 2,700	$ 10,400	$ 2,700
Letter of Credit [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate	2.75%		2.75%
Outstanding letters of credit	$ 37,700		$ 37,700
Fair Value, Inputs, Level 2 [Member] | Senior Notes [Member] | Senior unsecured notes due 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	352,000		352,000
Fair Value, Inputs, Level 2 [Member] | Senior Notes [Member] | Senior unsecured notes due 2023 [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	$ 305,000		$ 305,000

Commitments and Contingencies -

Commitments and Contingencies - Purchase and sale commitments (Details) bbl in Thousands, $ in Thousands	Jun. 30, 2016USD ($)bbl
Fixed Price Sales [Member]
Purchase and sale commitments
Sales Commitment Amount | $	$ 218,212
Sales Commitment Volume | bbl	4,563
Floating Price Sales [Member]
Purchase and sale commitments
Sales Commitment Amount | $	$ 760,170
Sales Commitment Volume | bbl	15,613
Fixed Price Purchases [Member]
Purchase and sale commitments
Purchase Commitment Amount | $	$ 167,030
Purchase Commitment Volume | bbl	3,528
Floating Price Purchases [Member]
Purchase and sale commitments
Purchase Commitment Amount | $	$ 601,820
Purchase Commitment Volume | bbl	12,701

Commitments and Contingencies44

Commitments and Contingencies (Details Textual) bbl in Thousands	Oct. 01, 2015	Jun. 30, 2016USD ($)bblsites
Commitments and Contingencies (Textual) [Abstract]
Site Contingency Number of Sites Checked		5
Number of sites closed | sites		1
Sites in various stages of follow-up		4
Sites with limited soil and ground water impact		2
Sites requiring additional investigation		2
Minimum [Member]
Supply Commitment [Line Items]
Notice Period For Cancellation Of Commitment		30 days
Maximum [Member]
Supply Commitment [Line Items]
Notice Period For Cancellation Of Commitment		120 days
Pipeline transportation capacity [Member]
Supply Commitment [Line Items]
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required | bbl		5
Term of unconditional purchase obligation	5 years
Unrecorded Unconditional Purchase Obligation		$ 9,400,000
Proposed Department of Transportation penalty [Member]
Supply Commitment [Line Items]
Accrued Liabilities		$ 600,200

Partners' Capital and Distrib45

Partners' Capital and Distributions - Equity rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Increase (Decrease) in Partners' Capital
Balance at December 31, 2015			$ 230,205
Net income	$ 9,922	$ 17,068	36,390	$ 31,668
Unvested distribution equivalent rights			66
Cash distributions to partners			(60,700)
Non-cash equity compensation			731
Balance at June 30, 2016	206,692		206,692
Common Units - Public [Member]
Increase (Decrease) in Partners' Capital
Balance at December 31, 2015			80,829
Net income			10,942
Unvested distribution equivalent rights			66
Cash distributions to partners			(21,485)
Non-cash equity compensation			731
Balance at June 30, 2016	71,083		71,083
Common Units - SemGroup [Member]
Increase (Decrease) in Partners' Capital
Balance at December 31, 2015			139,470
Net income			14,043
Unvested distribution equivalent rights			0
Cash distributions to partners			(27,331)
Non-cash equity compensation			0
Balance at June 30, 2016	126,182		126,182
General Partner Interest [Member]
Increase (Decrease) in Partners' Capital
Balance at December 31, 2015			9,906
Net income			11,405
Unvested distribution equivalent rights			0
Cash distributions to partners			(11,884)
Non-cash equity compensation			0
Balance at June 30, 2016	$ 9,427		$ 9,427

Partners' Capital and Distrib46

Partners' Capital and Distributions - Distributions (Details) - $ / shares	Aug. 12, 2016	May 13, 2016	Feb. 12, 2016	Nov. 13, 2015	Aug. 14, 2015	May 15, 2015	Feb. 13, 2015	Jun. 30, 2016
Distribution of Q4 2014 earnings [Member]
Distribution Made to Member or Limited Partner [Line Items]
Distribution payment date								Feb. 13, 2015
Distribution Made to Member or Limited Partner, Distributions Paid, Per Unit							$ 0.6200
Distribution Made to Member or Limited Partner, Date of Record								Feb. 3, 2015
Distribution of Q1 2015 earnings [Member]
Distribution Made to Member or Limited Partner [Line Items]
Distribution payment date								May 15, 2015
Distribution Made to Member or Limited Partner, Distributions Paid, Per Unit						$ 0.6350
Distribution Made to Member or Limited Partner, Date of Record								May 5, 2015
Distribution of Q2 2015 earnings [Member]
Distribution Made to Member or Limited Partner [Line Items]
Distribution payment date								Aug. 14, 2015
Distribution Made to Member or Limited Partner, Distributions Paid, Per Unit					$ 0.6500
Distribution Made to Member or Limited Partner, Date of Record								Aug. 4, 2015
Distribution of Q3 2015 Earnings [Member]
Distribution Made to Member or Limited Partner [Line Items]
Distribution payment date								Nov. 13, 2015
Distribution Made to Member or Limited Partner, Distributions Paid, Per Unit				$ 0.6600
Distribution Made to Member or Limited Partner, Date of Record								Nov. 3, 2015
Distribution of Q4 2015 Earnings [Member]
Distribution Made to Member or Limited Partner [Line Items]
Distribution payment date								Feb. 12, 2016
Distribution Made to Member or Limited Partner, Distributions Paid, Per Unit			$ 0.6600
Distribution Made to Member or Limited Partner, Date of Record								Feb. 2, 2016
Distribution of Q1 2016 Earnings [Member]
Distribution Made to Member or Limited Partner [Line Items]
Distribution payment date								May 13, 2016
Distribution Made to Member or Limited Partner, Distributions Paid, Per Unit		$ 0.6600
Distribution Made to Member or Limited Partner, Date of Record								May 3, 2016
Distribution of Q2 2016 Earnings [Member]
Distribution Made to Member or Limited Partner [Line Items]
Distribution payment date								Aug. 12, 2016
Distribution Made to Member or Limited Partner, Date of Record								Aug. 2, 2016
Subsequent Event [Member] | Distribution of Q2 2016 Earnings [Member]
Distribution Made to Member or Limited Partner [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	$ 0.6600

Partners' Capital and Distrib47

Partners' Capital and Distributions (Details Textual) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2016USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	117,204
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares	$ 9.62
Unvested share-based payment awards outstanding	176,306
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	39,344
Shares Paid for Tax Withholding for Share Based Compensation	254
Cash settled UUD [Member]
Unvested unit distributions value | $	$ 315

Earnings Per Limited Partner 48

Earnings Per Limited Partner Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Limited Partners' Capital Account [Line Items]
Net income attributable to Rose Rock Midstream, L.P.	$ 9,922	$ 17,068	$ 36,390	$ 31,668
Less: General partner's incentive distribution earned	5,339	4,981	10,677	9,431
Less: General partner's 2.0% ownership	198	342	728	634
Net income allocated to limited partners	$ 4,385	$ 11,745	$ 24,985	$ 21,603
Basic weighted average number of limited partner units outstanding	36,838	36,790	36,823	35,803
Diluted weighted average number of limited partner units outstanding	36,915	36,839	36,873	35,849
Net income per limited partner unit, basic	$ 0.12	$ 0.32	$ 0.68	$ 0.60
Net income per limited partner unit, diluted	$ 0.12	$ 0.32	$ 0.68	$ 0.60
Common Units [Member]
Limited Partners' Capital Account [Line Items]
Basic weighted average number of limited partner units outstanding	36,838	36,790	36,823	35,803
Effect of non-vested restricted units	77	49	50	46
Diluted weighted average number of limited partner units outstanding	36,915	36,839	36,873	35,849
Net income per limited partner unit, basic	$ 0.12	$ 0.32	$ 0.68	$ 0.60
Net income per limited partner unit, diluted	$ 0.12	$ 0.32	$ 0.68	$ 0.60

Earnings Per Limited Partner 49

Earnings Per Limited Partner Unit (Details Textual)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Limited Partner Unit (Textual) [Abstract]
Percentage of ownership general partner interest	2.00%	2.00%

Related Party Transactions (Det

Related Party Transactions (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
General Partner [Member]
Related Party Transactions (Textual) [Abstract]
Direct employee expenses	$ 12,000,000	$ 11,800,000	$ 23,400,000	$ 22,100,000
Allocated expenses	2,900,000	3,700,000	6,300,000	6,300,000
NGL Energy [Member]
Related Party Transactions (Textual) [Abstract]
Revenue from related parties	8,300,000	72,100,000	16,800,000	114,500,000
Purchases	6,400,000	75,000,000	13,200,000	110,200,000
Related Party Transaction Reimbursements from Transactions With Related Party	0	14,000	0	56,000
Sem Gas [Member]
Related Party Transactions (Textual) [Abstract]
Purchases	2,500,000	6,400,000	5,200,000	12,400,000
White Cliffs Pipeline L L C [Member]
Related Party Transactions (Textual) [Abstract]
Revenue from related parties	1,100,000	1,100,000	2,200,000	2,100,000
Purchases	3,500,000	0	3,500,000	0
Related Party Reimbursement of Expense from a Related Party Transaction	100,000	100,000	200,000	200,000
Related Party Transaction, Expenses from Transactions with Related Party	2,700,000	1,100,000	5,200,000	1,800,000
Glass Mountain Pipeline Llc [Member]
Related Party Transactions (Textual) [Abstract]
Purchases	0	0	400,000	1,500,000
Related Party Reimbursement of Expense from a Related Party Transaction	200,000	200,000	400,000	400,000
Related Party Transaction, Expenses from Transactions with Related Party	1,400,000	700,000	3,300,000	1,200,000
Conner & Winters LLP [Member]
Related Party Transactions (Textual) [Abstract]
Legal Fees	127,700	4,100	186,700	4,100
White Cliffs Pipeline L L C [Member] | Conner & Winters LLP [Member]
Related Party Transactions (Textual) [Abstract]
Legal Fees	$ 100	$ 100	$ 1,600	$ 3,400

Supplemental Cash Flow Inform51

Supplemental Cash Flow Information (Details Textual) - USD ($) shares in Thousands, $ in Millions	Feb. 13, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Significant Noncash Transactions [Line Items]
Interest Paid		$ 22.4	$ 15.8
Capital Expenditures Incurred but Not yet Paid		$ 0.9	$ 9.1
Glass Mountain Pipeline Llc [Member]
Other Significant Noncash Transactions [Line Items]
Equity method investment, ownership percentage		50.00%
Partners' Capital Account, Contributions		$ 0.3
Wattenberg Oil Trunkline and Glass Mountain Pipeline [Member]
Other Significant Noncash Transactions [Line Items]
Cash consideration in excess of historical cost	$ 46.3
Wattenberg Oil Trunkline and Glass Mountain Pipeline [Member] | Common Units [Member]
Other Significant Noncash Transactions [Line Items]
Units issued as consideration in acquisition	1,750
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 70.6
Wattenberg Oil Trunkline and Glass Mountain Pipeline [Member] | General Partner [Member]
Other Significant Noncash Transactions [Line Items]
Partners' Capital Account, Contributions	$ 3.3