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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities:      
Net loss $ (211) $ (6,771) $ (174,946)
Less: Loss from discontinued operations 0 0 179,466
Income (loss) from continuing operations (211) (6,771) 4,520
Adjustments to reconcile net income (loss) to net cash provided by operating activities:      
Depreciation and amortization 56,751 61,462 60,060
Amortization and write-off of deferred debt issue costs 3,367 3,422 4,041
Amortization of premium on notes payable 0 (191) (306)
Deferred income tax expense 2,432 1,169 1,360
(Gain) loss on disposition or sale of property, plant, and equipment 534 (9,788) (13,332)
Gain on involuntary conversion of property, plant and equipment (196) (4,907) 0
Gain on retirement of senior unsecured notes 0 (3,484) 0
Non-cash impact related to exchange of senior unsecured notes 0 (749) 0
Derivative income 5,593 8,209 5,137
Net cash paid for commodity derivatives (4,984) (8,669) (4,466)
Unit-based compensation 384 1,422 1,424
Change in current assets and liabilities, excluding effects of acquisitions and dispositions:      
Accounts and other receivables (31,448) 30,741 62
Product exchange receivables 0 0 166
Inventories (8,334) 5,264 21,493
Due from affiliates 398 2,932 1,822
Other current assets (3,552) (5,733) (254)
Trade and other accounts payable 14,331 (7,318) (898)
Product exchange payables 1,033 (3,949) (7,781)
Due to affiliates 1,389 (1,035) (1,469)
Income taxes payable (171) 84 27
Other accrued liabilities (2,236) 4,144 (3,017)
Change in other non-current assets and liabilities 649 (1,470) (543)
Net cash provided by continuing operating activities 35,729 64,785 68,046
Net cash provided by discontinued operating activities 0 0 7,769
Net cash provided by operating activities 35,729 64,785 75,815
Cash flows from investing activities:      
Payments for property, plant, and equipment (16,059) (28,622) (30,621)
Acquisitions, net of cash acquired 0 0 (23,720)
Payments for plant turnaround costs (4,109) (1,478) (5,677)
Proceeds from sale of property, plant, and equipment 643 25,154 20,660
Proceeds from involuntary conversion of property, plant and equipment 284 7,550 5,031
Net cash provided by (used in) continuing investing activities (19,241) 2,604 (34,327)
Net cash provided by discontinued investing activities 0 0 209,155
Net cash provided by (used in) investing activities (19,241) 2,604 174,828
Cash flows from financing activities:      
Payments of long-term debt (333,790) (333,637) (724,000)
Payments under finance lease obligations (2,707) (4,562) (5,514)
Proceeds from long-term debt 316,500 282,019 638,000
Proceeds from issuance of common units, net of issuance related costs 0 0 (289)
General partner contributions 3 0 0
Excess purchase price over carrying value of acquired assets 0 0 (102,393)
Purchase of treasury units (17) (9) (392)
Payments of debt issuance costs (592) (3,781) (4,406)
Cash distributions paid (791) (5,317) (49,093)
Net cash used in financing activities (21,394) (65,287) (248,087)
Net increase (decrease) in cash (4,906) 2,102 2,556
Cash at beginning of year 4,958 2,856 300
Cash at end of year $ 52 $ 4,958 $ 2,856