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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities:      
Net loss $ (10,334) $ (211) $ (6,771)
Adjustments to reconcile net loss to net cash provided by operating activities:      
Depreciation and amortization 56,280 56,751 61,462
Amortization and write-off of deferred debt issue costs 3,152 3,367 3,422
Amortization of premium on notes payable 0 0 (191)
Deferred income tax expense 5,744 2,432 1,169
(Gain) loss on disposition or sale of property, plant, and equipment (5,669) 534 (9,788)
Gain on involuntary conversion of property, plant and equipment 0 (196) (4,907)
Gain on retirement of senior unsecured notes 0 0 (3,484)
Non-cash impact related to exchange of senior unsecured notes 0 0 (749)
Derivative income (901) 5,593 8,209
Net cash paid for commodity derivatives 85 (4,984) (8,669)
Unit-based compensation 161 384 1,422
Change in current assets and liabilities, excluding effects of acquisitions and dispositions:      
Accounts and other receivables 4,579 (31,448) 30,741
Inventories (47,678) (8,334) 5,264
Due from affiliates 6,399 398 2,932
Other current assets (1,479) (3,552) (5,733)
Trade and other accounts payable 486 14,331 (7,318)
Product exchange payables (1,374) 1,033 (3,949)
Due to affiliates 7,123 1,389 (1,035)
Income taxes payable 280 (171) 84
Other accrued liabilities (2,087) (2,236) 4,144
Change in other non-current assets and liabilities 1,381 649 (1,470)
Net cash provided by operating activities 16,148 35,729 64,785
Cash flows from investing activities:      
Payments for property, plant, and equipment (27,237) (16,059) (28,622)
Payments for plant turnaround costs (5,176) (4,109) (1,478)
Proceeds from sale of property, plant, and equipment 7,769 643 25,154
Proceeds from involuntary conversion of property, plant and equipment 0 284 7,550
Net cash provided by (used in) investing activities (24,644) (19,241) 2,604
Cash flows from financing activities:      
Payments of long-term debt (393,740) (333,790) (333,637)
Payments under finance lease obligations (279) (2,707) (4,562)
Proceeds from long-term debt 404,650 316,500 282,019
General partner contributions 0 3 0
Excess purchase price over carrying value of acquired assets (1,285) 0 0
Purchase of treasury units 0 (17) (9)
Payments of debt issuance costs (64) (592) (3,781)
Cash distributions paid (793) (791) (5,317)
Net cash provided by (used in) financing activities 8,489 (21,394) (65,287)
Net increase (decrease) in cash (7) (4,906) 2,102
Cash at beginning of year 52 4,958 2,856
Cash at end of year $ 45 $ 52 $ 4,958