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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Cash Flows from Operating Activities:    
Net income $ 95,036 $ 57,373
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization expense 94,166 89,588
Amortization of debt related items 4,745 458
Gain from sale or disposition of assets (88) (8,746)
Asset impairment loss 2,067 0
Deferred income tax expense (benefit) 2,131 (1,347)
Equity in loss of joint ventures 1,012 21,271
Distributions of equity in earnings of joint ventures 3,094 4,652
Changes in current assets and current liabilities (Note 11) (12,490) 59,877
Other, net 10,709 8,429
Net cash provided by operating activities 200,382 231,555
Cash Flows from Investing Activities:    
Capital expenditures (118,872) (163,195)
Change in accounts payable related to capital expenditures (13,815) 0
Proceeds from sale or disposition of assets 14,441 116,447
Increase in note receivable from related party (13,328) (97,961)
Other, net (23) 132
Net cash used in investing activities (131,597) (144,577)
Cash Flows from Financing Activities:    
Proceeds from long-term debt borrowings 405,317 1,045,406
Proceeds from note offering, net of issuance costs 0 391,059
Proceeds from short-term debt borrowings 34,400 0
Long-term debt repayments (332,033) (1,334,532)
Short-term debt repayments (34,400) 0
Distributions to unitholders and general partner (196,102) (196,102)
Payments for termination of interest rate swaps 0 (33,697)
Other, net 2,998 3,320
Net cash used in financing activities (119,820) (124,546)
Effect of foreign exchange rate changes on cash (632) (3,907)
Net decrease in cash and cash equivalents (51,667) (41,475)
Cash and cash equivalents as of the beginning of the period 100,743 83,602
Cash and cash equivalents as of the end of the period $ 49,076 $ 42,127