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CONDENSED CONSOLIDATING FINANCIAL STATEMENTS Table 3 (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Cash flows from operating activities:    
Net cash provided by (used in) operating activities $ 32,118 $ 1,824
Cash flows from investing activities:    
Capital expenditures (211,139) (156,394)
Acquisitions 0 (100,448)
Investment in other long-term assets (2,286) (5,580)
Proceeds from sale or disposition of assets 31,006 289
Investment in subsidiaries   0
Net cash used in investing activities (182,419) (262,133)
Cash flows from financing activities:    
Debt borrowings 1,433,678 617,364
Debt repayments (1,331,758) (257,593)
Senior note offering, net 247,408 0
Distributions to unitholders and general partner (178,152) (159,232)
Contributions from (distributions to) affiliates   0
Proceeds from (payments for) termination of interest rate swaps (5,678) 9,112
Net intercompany borrowings (repayments) 0 0
Other, net (408) (2,811)
Net cash provided by (used in) financing activities 165,090 206,840
Effect of foreign exchange rate changes on cash 1,861 1,224
Net increase (decrease) in cash and cash equivalents 16,650 (52,245)
Cash and cash equivalents as of the beginning of the period 17,497 181,121
Cash and cash equivalents as of the end of the period 34,147 128,876
NuStar Energy
    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 177,042 158,188
Cash flows from investing activities:    
Capital expenditures 0 0
Acquisitions 0 0
Investment in other long-term assets 0 0
Proceeds from sale or disposition of assets 0 0
Investment in subsidiaries   (57,300)
Net cash used in investing activities 0 (57,300)
Cash flows from financing activities:    
Debt borrowings 0 0
Debt repayments 0 0
Senior note offering, net 0  
Distributions to unitholders and general partner (178,152) (159,232)
Contributions from (distributions to) affiliates   57,300
Proceeds from (payments for) termination of interest rate swaps 0 0
Net intercompany borrowings (repayments) 1,596 1,044
Other, net (425) 0
Net cash provided by (used in) financing activities (176,981) (100,888)
Effect of foreign exchange rate changes on cash 0 0
Net increase (decrease) in cash and cash equivalents 61 0
Cash and cash equivalents as of the beginning of the period 139 53
Cash and cash equivalents as of the end of the period 200 53
NuStar Logistics
    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 25,107 54,572
Cash flows from investing activities:    
Capital expenditures (153,890) (99,307)
Acquisitions 0 0
Investment in other long-term assets 0 0
Proceeds from sale or disposition of assets 143 40
Investment in subsidiaries   (47,869)
Net cash used in investing activities (153,747) (147,136)
Cash flows from financing activities:    
Debt borrowings 1,433,678 617,364
Debt repayments (1,081,758) (257,593)
Senior note offering, net 247,408  
Distributions to unitholders and general partner (178,152) (159,232)
Contributions from (distributions to) affiliates   (57,300)
Proceeds from (payments for) termination of interest rate swaps (5,678) 9,112
Net intercompany borrowings (repayments) (283,646) (131,914)
Other, net (1,720) (2,268)
Net cash provided by (used in) financing activities 130,132 18,169
Effect of foreign exchange rate changes on cash (1,496) 6,849
Net increase (decrease) in cash and cash equivalents (4) (67,546)
Cash and cash equivalents as of the beginning of the period 14 107,655
Cash and cash equivalents as of the end of the period 10 40,109
NuPOP
    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 45,687 18,441
Cash flows from investing activities:    
Capital expenditures (7,745) (1,802)
Acquisitions 0 0
Investment in other long-term assets 0 0
Proceeds from sale or disposition of assets 19 44
Investment in subsidiaries   (56,727)
Net cash used in investing activities (7,726) (58,485)
Cash flows from financing activities:    
Debt borrowings 0 0
Debt repayments (250,000) 0
Senior note offering, net 0  
Distributions to unitholders and general partner 0 0
Contributions from (distributions to) affiliates   56,727
Proceeds from (payments for) termination of interest rate swaps 0 0
Net intercompany borrowings (repayments) 212,039 (16,683)
Other, net 0 0
Net cash provided by (used in) financing activities (37,961) 40,044
Effect of foreign exchange rate changes on cash 0 0
Net increase (decrease) in cash and cash equivalents 0 0
Cash and cash equivalents as of the beginning of the period 0 0
Cash and cash equivalents as of the end of the period 0 0
Non-Guarantor Subsidiaries (a)
    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities (30,157) (70,129)
Cash flows from investing activities:    
Capital expenditures (49,504) (55,285)
Acquisitions 0 (100,448)
Investment in other long-term assets (2,286) (5,580)
Proceeds from sale or disposition of assets 30,844 205
Investment in subsidiaries   (56,727)
Net cash used in investing activities (20,946) (217,835)
Cash flows from financing activities:    
Debt borrowings 0 0
Debt repayments 0 0
Senior note offering, net 0  
Distributions to unitholders and general partner (7,417) (16)
Contributions from (distributions to) affiliates   161,896
Proceeds from (payments for) termination of interest rate swaps 0 0
Net intercompany borrowings (repayments) 70,019 147,553
Other, net 1,737 (543)
Net cash provided by (used in) financing activities 64,339 308,890
Effect of foreign exchange rate changes on cash 3,357 (5,625)
Net increase (decrease) in cash and cash equivalents 16,593 15,301
Cash and cash equivalents as of the beginning of the period 17,344 73,413
Cash and cash equivalents as of the end of the period 33,937 88,714
Eliminations
    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities (185,561) (159,248)
Cash flows from investing activities:    
Capital expenditures 0 0
Acquisitions 0 0
Investment in other long-term assets 0 0
Proceeds from sale or disposition of assets 0 0
Investment in subsidiaries   218,623
Net cash used in investing activities 0 218,623
Cash flows from financing activities:    
Debt borrowings 0 0
Debt repayments 0 0
Senior note offering, net 0  
Distributions to unitholders and general partner 185,569 159,248
Contributions from (distributions to) affiliates   (218,623)
Proceeds from (payments for) termination of interest rate swaps 0 0
Net intercompany borrowings (repayments) (8) 0
Other, net 0 0
Net cash provided by (used in) financing activities 185,561 (59,375)
Effect of foreign exchange rate changes on cash 0 0
Net increase (decrease) in cash and cash equivalents 0 0
Cash and cash equivalents as of the beginning of the period 0 0
Cash and cash equivalents as of the end of the period $ 0 $ 0