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CONDENSED CONSOLIDATING FINANCIAL STATEMENTS Table 3 (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Cash flows from operating activities:    
Net cash provided by (used in) operating activities $ 215,033 $ 237,187
Cash flows from investing activities:    
Capital expenditures (95,361) (153,621)
Change in accounts payable related to capital expenditures (12,674) (7,954)
Acquisitions 0 (142,500)
Investment in other long-term assets 0 (3,444)
Proceeds from sale or disposition of assets 0 1,307
Net cash used in investing activities (108,035) (306,212)
Cash flows from financing activities:    
Debt borrowings 627,904 1,041,735
Debt repayments (547,192) (733,292)
Distributions to unitholders and general partner (196,102) (196,102)
(Distributions to) contributions from affiliates 0  
Net intercompany activity 0 0
Other, net (11,840) (14,260)
Net cash (used in) provided by financing activities (127,230) 98,081
Effect of foreign exchange rate changes on cash 4,389 (5,331)
Net increase (decrease) in cash and cash equivalents (15,843) 23,725
Cash and cash equivalents as of the beginning of the period 118,862 87,912
Cash and cash equivalents as of the end of the period 103,019 111,637
Eliminations    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities (318,674) (294,164)
Cash flows from investing activities:    
Capital expenditures 0 0
Change in accounts payable related to capital expenditures 0 0
Acquisitions   0
Investment in other long-term assets   0
Proceeds from sale or disposition of assets   0
Net cash used in investing activities 0 0
Cash flows from financing activities:    
Debt borrowings 0 0
Debt repayments 0 0
Distributions to unitholders and general partner 294,164 294,164
(Distributions to) contributions from affiliates 24,510  
Net intercompany activity 0 0
Other, net 0 0
Net cash (used in) provided by financing activities 318,674 294,164
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 194,793 194,802
Cash flows from investing activities:    
Capital expenditures 0 0
Change in accounts payable related to capital expenditures 0 0
Acquisitions   0
Investment in other long-term assets   0
Proceeds from sale or disposition of assets   0
Net cash used in investing activities 0 0
Cash flows from financing activities:    
Debt borrowings 0 0
Debt repayments 0 0
Distributions to unitholders and general partner (196,102) (196,102)
(Distributions to) contributions from affiliates 0  
Net intercompany activity 1,755 1,241
Other, net (668) 0
Net cash (used in) provided by financing activities (195,015) (194,861)
Effect of foreign exchange rate changes on cash 0 0
Net increase (decrease) in cash and cash equivalents (222) (59)
Cash and cash equivalents as of the beginning of the period 885 923
Cash and cash equivalents as of the end of the period 663 864
NuStar Logistics    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 58,160 73,389
Cash flows from investing activities:    
Capital expenditures (47,672) (108,591)
Change in accounts payable related to capital expenditures (12,230) (8,082)
Acquisitions   0
Investment in other long-term assets   0
Proceeds from sale or disposition of assets   62
Net cash used in investing activities (59,902) (116,611)
Cash flows from financing activities:    
Debt borrowings 610,504 952,835
Debt repayments (532,992) (733,292)
Distributions to unitholders and general partner (98,051) (98,051)
(Distributions to) contributions from affiliates 0  
Net intercompany activity 24,561 (72,816)
Other, net (2,281) (5,454)
Net cash (used in) provided by financing activities 1,741 43,222
Effect of foreign exchange rate changes on cash 0 0
Net increase (decrease) in cash and cash equivalents (1) 0
Cash and cash equivalents as of the beginning of the period 4 6
Cash and cash equivalents as of the end of the period 3 6
NuPOP    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 79,728 52,154
Cash flows from investing activities:    
Capital expenditures (19,474) (12,344)
Change in accounts payable related to capital expenditures 3,357 506
Acquisitions   0
Investment in other long-term assets   0
Proceeds from sale or disposition of assets   14
Net cash used in investing activities (16,117) (11,824)
Cash flows from financing activities:    
Debt borrowings 0 0
Debt repayments 0 0
Distributions to unitholders and general partner (98,051) (98,051)
(Distributions to) contributions from affiliates 0  
Net intercompany activity 34,440 57,721
Other, net 0 0
Net cash (used in) provided by financing activities (63,611) (40,330)
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 201,026 211,006
Cash flows from investing activities:    
Capital expenditures (28,215) (32,686)
Change in accounts payable related to capital expenditures (3,801) (378)
Acquisitions   (142,500)
Investment in other long-term assets   (3,444)
Proceeds from sale or disposition of assets   1,231
Net cash used in investing activities (32,016) (177,777)
Cash flows from financing activities:    
Debt borrowings 17,400 88,900
Debt repayments (14,200) 0
Distributions to unitholders and general partner (98,062) (98,062)
(Distributions to) contributions from affiliates (24,510)  
Net intercompany activity (60,756) 13,854
Other, net (8,891) (8,806)
Net cash (used in) provided by financing activities (189,019) (4,114)
Effect of foreign exchange rate changes on cash 4,389 (5,331)
Net increase (decrease) in cash and cash equivalents (15,620) 23,784
Cash and cash equivalents as of the beginning of the period 117,973 86,983
Cash and cash equivalents as of the end of the period $ 102,353 $ 110,767