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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 (loss) $ 147,964 $ 150,003 $ 306,720
Adjustments to reconcile net income (loss) to net cash provided by operating activities:      
Depreciation and amortization expense 264,232 216,736 210,210
Unit-based compensation expense 8,132 7,579 0
Amortization of debt related items 6,147 7,477 8,840
Loss (gain) from sale or disposition of assets 4,984 64 (1,617)
Gain associated with the Linden Acquisition 0 0 (56,277)
Impairment loss 0 58,655 0
Deferred income tax expense (benefit) 6 (469) 2,058
Distributions of equity in earnings of joint ventures 0 0 2,500
Changes in current assets and current liabilities (Note 21) (26,493) 3,716 50,559
Other, net 1,827 (7,000) 1,944
Net cash provided by operating activities 406,799 436,761 524,937
Cash Flows from Investing Activities:      
Capital expenditures (384,638) (204,358) (324,808)
Change in accounts payable related to capital expenditures 36,903 (11,063) (3,156)
Acquisitions (1,461,719) (95,657) (142,500)
Proceeds from Axeon term loan 110,000 0 0
Proceeds from insurance recoveries 977 0 4,867
Proceeds from sale or disposition of assets 2,036 0 17,132
Investment in other long-term assets 0 0 (3,564)
Net cash used in investing activities (1,696,441) (311,078) (452,029)
Cash Flows from Financing Activities:      
Proceeds from long-term debt borrowings 1,465,767 752,729 860,131
Proceeds from short-term debt borrowings 1,051,000 654,000 823,500
Proceeds from note offering, net of issuance costs 543,333 0 0
Long-term debt repayments (1,417,539) (772,152) (500,410)
Short-term debt repayments (1,070,000) (684,000) (816,500)
Proceeds from issuance of preferred units, net of issuance costs 538,560 218,400 0
Proceeds from issuance of common units, net of issuance costs 643,878 27,710 0
Contributions from general partner 13,737 680 0
Distributions to preferred unitholders (38,833) 0 0
Distributions to common unitholders and general partner (446,306) (392,962) (392,204)
Increase (decrease) in cash book overdrafts 1,736 (11,237) (2,954)
Other, net (9,061) (4,492) (792)
Net cash provided by (used in) financing activities 1,276,272 (211,324) (29,229)
Effect of foreign exchange rate changes on cash 1,720 2,721 (12,729)
Net (decrease) increase in cash and cash equivalents (11,650) (82,920) 30,950
Cash and cash equivalents as of the beginning of the period 35,942 118,862 87,912
Cash and cash equivalents as of the end of the period $ 24,292 $ 35,942 $ 118,862