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CONDENSED CONSOLIDATING FINANCIAL STATEMENTS Table 3 (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Cash flows from operating activities:    
Net cash provided by (used in) 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)
Investment in subsidiaries   0
Other, net (23) 132
Net cash provided by (used in) investing activities (131,597) (144,577)
Cash flows from financing activities:    
Debt borrowings 439,717 1,045,406
Note offering, net 0 391,059
Debt repayments (366,433) (1,334,532)
Distributions to unitholders and general partner (196,102) (196,102)
Proceeds from (payments for) termination of interest rate swaps 0 (33,697)
Net intercompany borrowings (repayments) 0 0
Other, net 2,998 3,320
Net cash provided by (used in) financing activities (119,820) (124,546)
Effect of foreign exchange rate changes on cash (632) (3,907)
Net increase (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
Eliminations
    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities (245,143) (196,122)
Cash flows from investing activities:    
Capital expenditures 0 0
Change in accounts payable related to capital expenditures 0  
Proceeds from sale or disposition of assets 0 0
Increase in note receivable from related party 0 0
Investment in subsidiaries   166
Other, net 23 0
Net cash provided by (used in) investing activities 23 166
Cash flows from financing activities:    
Debt borrowings 0 0
Note offering, net   0
Debt repayments 0 0
Distributions to unitholders and general partner 245,143 196,122
Proceeds from (payments for) termination of interest rate swaps   0
Net intercompany borrowings (repayments) 0 0
Other, net (23) (166)
Net cash provided by (used in) financing activities 245,120 195,956
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
NuStar Energy
    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 194,985 194,754
Cash flows from investing activities:    
Capital expenditures 0 0
Change in accounts payable related to capital expenditures 0  
Proceeds from sale or disposition of assets 0 0
Increase in note receivable from related party 0 0
Investment in subsidiaries   (166)
Other, net 0 166
Net cash provided by (used in) investing activities 0 0
Cash flows from financing activities:    
Debt borrowings 0 0
Note offering, net   0
Debt repayments 0 0
Distributions to unitholders and general partner (196,102) (196,102)
Proceeds from (payments for) termination of interest rate swaps   0
Net intercompany borrowings (repayments) 1,126 1,395
Other, net 0 (45)
Net cash provided by (used in) financing activities (194,976) (194,752)
Effect of foreign exchange rate changes on cash 0 0
Net increase (decrease) in cash and cash equivalents 9 2
Cash and cash equivalents as of the beginning of the period 904 7,033
Cash and cash equivalents as of the end of the period 913 7,035
NuStar Logistics
    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 57,932 89,580
Cash flows from investing activities:    
Capital expenditures (82,959) (123,253)
Change in accounts payable related to capital expenditures (4,182)  
Proceeds from sale or disposition of assets 651 116,322
Increase in note receivable from related party (13,328) (97,961)
Investment in subsidiaries   0
Other, net (46) (34)
Net cash provided by (used in) investing activities (99,864) (104,926)
Cash flows from financing activities:    
Debt borrowings 439,717 1,045,406
Note offering, net   391,059
Debt repayments (366,433) (1,084,532)
Distributions to unitholders and general partner (147,076) (196,102)
Proceeds from (payments for) termination of interest rate swaps   (33,697)
Net intercompany borrowings (repayments) 90,600 (111,226)
Other, net 2,824 3,335
Net cash provided by (used in) financing activities 19,632 14,243
Effect of foreign exchange rate changes on cash 0 0
Net increase (decrease) in cash and cash equivalents (22,300) (1,103)
Cash and cash equivalents as of the beginning of the period 22,307 1,112
Cash and cash equivalents as of the end of the period 7 9
NuPOP
    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 68,634 48,178
Cash flows from investing activities:    
Capital expenditures (3,927) (5,664)
Change in accounts payable related to capital expenditures (500)  
Proceeds from sale or disposition of assets 5 20
Increase in note receivable from related party 0 0
Investment in subsidiaries   0
Other, net 0 0
Net cash provided by (used in) investing activities (4,422) (5,644)
Cash flows from financing activities:    
Debt borrowings 0 0
Note offering, net   0
Debt repayments 0 (250,000)
Distributions to unitholders and general partner (49,026) 0
Proceeds from (payments for) termination of interest rate swaps   0
Net intercompany borrowings (repayments) (15,186) 207,466
Other, net 0 0
Net cash provided by (used in) financing activities (64,212) (42,534)
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
    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 123,974 95,165
Cash flows from investing activities:    
Capital expenditures (31,986) (34,278)
Change in accounts payable related to capital expenditures (9,133)  
Proceeds from sale or disposition of assets 13,785 105
Increase in note receivable from related party 0 0
Investment in subsidiaries   0
Other, net 0 0
Net cash provided by (used in) investing activities (27,334) (34,173)
Cash flows from financing activities:    
Debt borrowings 0 0
Note offering, net   0
Debt repayments 0 0
Distributions to unitholders and general partner (49,041) (20)
Proceeds from (payments for) termination of interest rate swaps   0
Net intercompany borrowings (repayments) (76,540) (97,635)
Other, net 197 196
Net cash provided by (used in) financing activities (125,384) (97,459)
Effect of foreign exchange rate changes on cash (632) (3,907)
Net increase (decrease) in cash and cash equivalents (29,376) (40,374)
Cash and cash equivalents as of the beginning of the period 77,532 75,457
Cash and cash equivalents as of the end of the period $ 48,156 $ 35,083