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CONDENSED CONSOLIDATING FINANCIAL STATEMENTS Table 3 (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash flows from operating activities:      
Net cash provided by (used in) operating activities $ 94,468 $ 362,500 $ 180,582
Cash flows from investing activities:      
Capital expenditures (335,660) (269,830) (208,556)
Acquisitions (100,690) (43,026) 0
Investment in other long-term assets (8,990) (3,469) (211)
Proceeds from sale or disposition of assets 2,086 2,610 29,680
Proceeds from insurance recoveries 0 13,500 11,382
Investment in subsidiaries 0 0 0
Net cash used in investing activities (443,254) (300,215) (167,705)
Cash flows from financing activities:      
Debt borrowings 949,549 1,076,406 1,608,188
Debt repayments (801,950) (1,401,354) (1,641,119)
Senior note offering, net 0 445,431 0
Issuance of common units, net of issuance costs 317,285 240,148 288,761
General partner contribution 6,708 5,078 6,155
Distributions to unitholders and general partner (322,046) (305,154) (263,896)
Proceeds from termination of interest rate swaps 33,433 0 0
Contributions from (distributions to) affiliates 0 0 0
Net intercompany borrowings (repayments) 0 0 0
Other, net 3,742 (4,289) (761)
Net cash provided by (used in) financing activities 186,721 56,266 (2,672)
Effect of foreign exchange rate changes on cash (1,559) 564 6,426
Net increase (decrease) in cash and cash equivalents (163,624) 119,115 16,631
Cash and cash equivalents as of the beginning of the period 181,121 62,006 45,375
Cash and cash equivalents as of the end of the period 17,497 181,121 62,006
NuStar Energy
     
Cash flows from operating activities:      
Net cash provided by (used in) operating activities 377,469 302,373 263,017
Cash flows from investing activities:      
Capital expenditures 0 0 0
Acquisitions 0 0  
Investment in other long-term assets 0 0 0
Proceeds from sale or disposition of assets 0 0 0
Proceeds from insurance recoveries   0 0
Investment in subsidiaries (374,628) (245,604) (295,178)
Net cash used in investing activities (374,628) (245,604) (295,178)
Cash flows from financing activities:      
Debt borrowings 0 0 0
Debt repayments 0 0 0
Senior note offering, net   0  
Issuance of common units, net of issuance costs 317,285 240,148 288,761
General partner contribution 6,708 5,078 6,155
Distributions to unitholders and general partner (322,046) (305,154) (263,896)
Proceeds from termination of interest rate swaps 0    
Contributions from (distributions to) affiliates 0 0 0
Net intercompany borrowings (repayments) (4,702) 3,159 1,141
Other, net 0 0 0
Net cash provided by (used in) financing activities (2,755) (56,769) 32,161
Effect of foreign exchange rate changes on cash 0 0 0
Net increase (decrease) in cash and cash equivalents 86 0 0
Cash and cash equivalents as of the beginning of the period 53 53 53
Cash and cash equivalents as of the end of the period 139 53 53
NuStar Logistics
     
Cash flows from operating activities:      
Net cash provided by (used in) operating activities 121,416 144,654 103,753
Cash flows from investing activities:      
Capital expenditures (197,845) (109,023) (49,800)
Acquisitions (47,817) 0  
Investment in other long-term assets 0 0 0
Proceeds from sale or disposition of assets 63 25 29,215
Proceeds from insurance recoveries   0 0
Investment in subsidiaries 0 0 0
Net cash used in investing activities (245,599) (108,998) (20,585)
Cash flows from financing activities:      
Debt borrowings 949,549 1,076,406 1,608,188
Debt repayments (801,950) (1,401,354) (1,641,119)
Senior note offering, net   445,431  
Issuance of common units, net of issuance costs 0 0 0
General partner contribution 0 0 0
Distributions to unitholders and general partner (322,046) (305,154) (263,896)
Proceeds from termination of interest rate swaps 33,433    
Contributions from (distributions to) affiliates 260,028 245,604 295,178
Net intercompany borrowings (repayments) (105,944) 19,424 (80,506)
Other, net 4,705 (3,458) (1,982)
Net cash provided by (used in) financing activities 17,775 76,899 (84,137)
Effect of foreign exchange rate changes on cash (1,233) (6,502) 2,569
Net increase (decrease) in cash and cash equivalents (107,641) 106,053 1,600
Cash and cash equivalents as of the beginning of the period 107,655 1,602 2
Cash and cash equivalents as of the end of the period 14 107,655 1,602
NuPOP
     
Cash flows from operating activities:      
Net cash provided by (used in) operating activities 59,109 30,740 70,433
Cash flows from investing activities:      
Capital expenditures (8,093) (14,621) (23,734)
Acquisitions 0 0  
Investment in other long-term assets 0 0 0
Proceeds from sale or disposition of assets 86 34 108
Proceeds from insurance recoveries   0 0
Investment in subsidiaries (56,727) 0 0
Net cash used in investing activities (64,734) (14,587) (23,626)
Cash flows from financing activities:      
Debt borrowings 0 0 0
Debt repayments 0 0 0
Senior note offering, net   0  
Issuance of common units, net of issuance costs 0 0 0
General partner contribution 0 0 0
Distributions to unitholders and general partner 0 0 0
Proceeds from termination of interest rate swaps 0    
Contributions from (distributions to) affiliates 56,727 0 0
Net intercompany borrowings (repayments) (51,102) (16,133) (47,483)
Other, net 0 (20) 20
Net cash provided by (used in) financing activities 5,625 (16,153) (47,463)
Effect of foreign exchange rate changes on cash 0 0 0
Net increase (decrease) in cash and cash equivalents 0 0 (656)
Cash and cash equivalents as of the beginning of the period 0 0 656
Cash and cash equivalents as of the end of the period 0 0 0
Non-Guarantor Subsidiaries (a)
     
Cash flows from operating activities:      
Net cash provided by (used in) operating activities (84,135) 189,918 32,302
Cash flows from investing activities:      
Capital expenditures (129,722) (146,186) (135,022)
Acquisitions (52,873) (43,026)  
Investment in other long-term assets (8,990) (3,469) (211)
Proceeds from sale or disposition of assets 1,937 2,551 357
Proceeds from insurance recoveries   13,500 11,382
Investment in subsidiaries (56,759) (25) (30)
Net cash used in investing activities (246,407) (176,655) (123,524)
Cash flows from financing activities:      
Debt borrowings 0 0 0
Debt repayments 0 0 0
Senior note offering, net   0  
Issuance of common units, net of issuance costs 0 0 0
General partner contribution 0 0 0
Distributions to unitholders and general partner (32) (31) (25,027)
Proceeds from termination of interest rate swaps 0    
Contributions from (distributions to) affiliates 114,053 25 30
Net intercompany borrowings (repayments) 161,741 (6,450) 126,848
Other, net (963) (811) 1,201
Net cash provided by (used in) financing activities 274,799 (7,267) 103,052
Effect of foreign exchange rate changes on cash (326) 7,066 3,857
Net increase (decrease) in cash and cash equivalents (56,069) 13,062 15,687
Cash and cash equivalents as of the beginning of the period 73,413 60,351 44,664
Cash and cash equivalents as of the end of the period 17,344 73,413 60,351
Eliminations
     
Cash flows from operating activities:      
Net cash provided by (used in) operating activities (379,391) (305,185) (288,923)
Cash flows from investing activities:      
Capital expenditures 0 0 0
Acquisitions 0 0  
Investment in other long-term assets 0 0 0
Proceeds from sale or disposition of assets 0 0 0
Proceeds from insurance recoveries   0 0
Investment in subsidiaries 488,114 245,629 295,208
Net cash used in investing activities 488,114 245,629 295,208
Cash flows from financing activities:      
Debt borrowings 0 0 0
Debt repayments 0 0 0
Senior note offering, net   0  
Issuance of common units, net of issuance costs 0 0 0
General partner contribution 0 0 0
Distributions to unitholders and general partner 322,078 305,185 288,923
Proceeds from termination of interest rate swaps 0    
Contributions from (distributions to) affiliates (430,808) (245,629) (295,208)
Net intercompany borrowings (repayments) 7 0 0
Other, net 0 0 0
Net cash provided by (used in) financing activities (108,723) 59,556 (6,285)
Effect of foreign exchange rate changes on cash 0 0 0
Net increase (decrease) in cash and cash equivalents 0 0 0
Cash and cash equivalents as of the beginning of the period 0 0 0
Cash and cash equivalents as of the end of the period $ 0 $ 0 $ 0