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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Cash flows from operating activities:    
Net income $ 14,072 $ 8,635
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 19,211 21,945
Amortization of debt issuance costs 754 1,200
Unrealized (gain) loss related to interest rate swaps 44 (277)
Intangible asset impairment charge 189
Fixed asset impairment charge 2,316 442
Gain on sale of assets (1,765) (300)
Gain on sale of unconsolidated affiliate (2,225)
Equity-based incentive compensation 652 1,352
Changes in assets and liabilities:    
Decrease (increase) in accounts receivable 7,128 (39,328)
Decrease (increase) in receivables from related parties (830) 1,423
Decrease in other current assets 3,571 868
Decrease in other non-current assets 2,255 424
Decrease in accounts payable (250) (435)
Increase in payables to related parties 535 1,068
Decrease in accrued interest payable (176) (232)
Increase in accrued property taxes 612 1,718
Increase in unearned revenue 1,557 853
Increase (decrease) in unearned revenue from related parties (2,380) 2,829
Increase (decrease) in accrued payroll 169 (2,281)
Decrease in other accrued liabilities (2,926) (1,504)
Net cash provided by operating activities 38,284 28,187
Cash flows from investing activities:    
Acquisitions (21,959)
Capital expenditures (9,428) (29,560)
Proceeds from sale of assets 7,089 4,707
Proceeds from sale of unconsolidated affiliate 2,225
Net cash provided by (used in) investing activities (2,339) 43,951
Cash flows from financing activities:    
Payments on other financing activities (1,894) (1,722)
Debt issuance costs (358)
Borrowings under credit agreement 218,000 216,000
Payments under credit agreement (225,000) (252,000)
Proceeds from equity issuance 176 208
Capital contributions 183
Distributions (25,905) (34,992)
Net cash used in financing activities (34,623) (72,681)
Net increase (decrease) in cash and cash equivalents 1,322 (543)
Cash and cash equivalents at beginning of period 1,455 2,469
Cash and cash equivalents at end of period 2,777 1,926
Supplemental disclosure of non-cash financing and investing cash flow information:    
Non-cash changes in property, plant and equipment 1,528 (908)
Increase in accrued liabilities related to insurance premium financing agreement 2,356 2,225
Ergon [Member]    
Cash flows from investing activities:    
Proceeds from sale of assets 88,538
Supplemental disclosure of non-cash financing and investing cash flow information:    
Non-cash change in assets and liabilities due to settlement items related to the sale of terminal assets to Ergon (1,308)
Third Party [Member]    
Changes in assets and liabilities:    
Increase (decrease) in accrued crude oil purchases (7,484) 15,142
Related Party [Member]    
Changes in assets and liabilities:    
Increase (decrease) in accrued crude oil purchases $ 1,219 $ 16,681