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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash flows from operating activities:      
Net income $ 69,409 $ 62,804 $ 66,211
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 21,914 20,813 19,692
Amortization of deferred revenue (1,234) (1,085) (596)
Amortization of deferred financing costs and debt discount 2,048 1,460 1,460
Accretion of asset retirement obligations 292 266 251
Loss (gain) on asset disposals (20) (16) 104
Deferred income taxes (111) (173) 14
(Income) loss from equity method investments (4,953) 1,178 588
Dividends from equity method investments 3,099 0 0
Unit-based compensation expense 721 599 406
Changes in assets and liabilities:      
Accounts receivable (3,811) 15,847 (7,197)
Inventories and other current assets (11,692) 2,045 (907)
Accounts payable and other current liabilities 10,859 3,551 (13,734)
Accounts receivable/payable to related parties 1,682 (6,983) 1,737
Non-current assets and liabilities, net (500) 401 (5)
Net cash provided by operating activities 87,703 100,707 68,024
Cash flows from investing activities:      
Asset acquisitions (9,003) 0 (400)
Purchases of property, plant and equipment (18,184) (11,287) (19,956)
Proceeds from sales of property, plant and equipment 46 175 1,198
Equity method investments (3,531) (61,580) (37,434)
Net cash used in investing activities (30,672) (72,692) (56,592)
Cash flows from financing activities:      
Proceeds from issuance of additional units to maintain 2% General Partner interest 21 29 50
Distributions to general partner (17,691) (10,244) (3,918)
Distributions to common unitholders - public (25,978) (23,847) (20,755)
Distributions to common unitholders - Delek (42,490) (25,271) (6,046)
Distributions to subordinated unitholders - Delek 0 (11,503) (25,919)
Distributions to Delek for acquisitions 0 0 (61,890)
Proceeds from revolving credit facility 277,100 314,750 396,400
Payments of revolving credit facility (489,800) (273,750) (296,550)
Proceeds from issuance of senior notes 248,112 0 0
Deferred financing costs paid (5,951) 0 0
Predecessor division equity contribution 0 0 115
Reimbursement of capital expenditures by Delek 4,262 1,880 5,220
Net cash used in financing activities (52,415) (27,956) (13,293)
Net increase (decrease) in cash and cash equivalents 4,616 59 (1,861)
Cash and cash equivalents at the beginning of the period 59 0 1,861
Cash and cash equivalents at the end of the period 4,675 59 0
Cash paid during the period for:      
Interest 19,441 12,206 9,009
Income taxes 60 224 4
Non-cash investing activities:      
Equity method investments 0 0 3,832
Increase in accrued capital expenditures 194 480 2,471
Non-cash financing activities:      
Sponsor contribution of fixed assets $ 67 $ 5,167 $ 584