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CONDENSED CONSOLIDATING FINANCIAL STATEMENTS Table 2 (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Condensed Financial Statements, Captions [Line Items]    
Revenues $ 405,703 $ 554,944
Costs and expenses 311,138 455,663
Operating (loss) income 94,565 99,281
Equity in earnings (loss) of subsidiaries 0 0
Interest (expense) income, net (34,123) (32,037)
Other income (expense), net (171) 62,268
Income from continuing operations before income tax expense 60,271 129,512
Income tax expense (benefit) 2,870 2,387
Income from continuing operations 57,401 127,125
Income from discontinued operations, net of tax 0 774
Net income 57,401 127,899
Comprehensive income (loss) 42,623 107,798
Eliminations    
Condensed Financial Statements, Captions [Line Items]    
Revenues (336) (327)
Costs and expenses (336) (369)
Operating (loss) income 0 42
Equity in earnings (loss) of subsidiaries (123,833) (307,197)
Interest (expense) income, net (4,351) 0
Other income (expense), net 0 0
Income from continuing operations before income tax expense (128,184) (307,155)
Income tax expense (benefit) 0 0
Income from continuing operations   (307,155)
Income from discontinued operations, net of tax   0
Net income (128,184) (307,155)
Comprehensive income (loss) (128,184) (307,155)
NuStar Energy    
Condensed Financial Statements, Captions [Line Items]    
Revenues 0 0
Costs and expenses 518 490
Operating (loss) income (518) (490)
Equity in earnings (loss) of subsidiaries 57,922 128,389
Interest (expense) income, net 0 0
Other income (expense), net 0 0
Income from continuing operations before income tax expense 57,404 127,899
Income tax expense (benefit) 3 0
Income from continuing operations   127,899
Income from discontinued operations, net of tax   0
Net income 57,401 127,899
Comprehensive income (loss) 57,401 127,899
NuStar Logistics    
Condensed Financial Statements, Captions [Line Items]    
Revenues 126,578 134,036
Costs and expenses 68,891 72,906
Operating (loss) income 57,687 61,130
Equity in earnings (loss) of subsidiaries (3,115) (4,164)
Interest (expense) income, net (39,632) (32,174)
Other income (expense), net 1 1,340
Income from continuing operations before income tax expense 14,941 26,132
Income tax expense (benefit) 346 (1,026)
Income from continuing operations   27,158
Income from discontinued operations, net of tax   0
Net income 14,595 27,158
Comprehensive income (loss) (13,161) 27,661
NuPOP    
Condensed Financial Statements, Captions [Line Items]    
Revenues 47,985 52,574
Costs and expenses 31,015 33,124
Operating (loss) income 16,970 19,450
Equity in earnings (loss) of subsidiaries 25,283 81,699
Interest (expense) income, net 1,508 119
Other income (expense), net (17) 2
Income from continuing operations before income tax expense 43,744 101,270
Income tax expense (benefit) 2 0
Income from continuing operations   101,270
Income from discontinued operations, net of tax   0
Net income 43,742 101,270
Comprehensive income (loss) 43,742 101,270
Non-Guarantor Subsidiaries    
Condensed Financial Statements, Captions [Line Items]    
Revenues 231,476 368,661
Costs and expenses 211,050 349,512
Operating (loss) income 20,426 19,149
Equity in earnings (loss) of subsidiaries 43,743 101,273
Interest (expense) income, net 8,352 18
Other income (expense), net (155) 60,926
Income from continuing operations before income tax expense 72,366 181,366
Income tax expense (benefit) 2,519 3,413
Income from continuing operations   177,953
Income from discontinued operations, net of tax   774
Net income 69,847 178,727
Comprehensive income (loss) $ 82,825 $ 158,123