Acquisitions Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CURRENT ASSETS
Cash and cash equivalents	$ 19,290	$ 18,326	$ 0	$ 0
Trade	343	3,369
Affiliate	17,660	12,117
Prepayments	1,130	778
Total Current Assets	38,423	34,590
NET PROPERTY, PLANT AND EQUIPMENT	274,372	196,147
DEPOSITS	40,041	1,527
OTHER NONCURRENT ASSETS	10,342	1,545
Total Assets	363,178	233,809	192,621
CURRENT LIABILITIES
Trade	9,005	6,743
Affiliate	7,089	2,861
Deferred revenue - affiliate	2,027	1,775
Accrued interest and financing costs	6,116	18
Other current liabilities	3,095	3,075
Total Current Liabilities	27,332	14,472
OTHER NONCURRENT LIABILITIES	47	2,665
DEBT	353,922	50,000
EQUITY (DEFICIT)
Equity of Predecessors	0	57,702
Common unitholders	153,037	250,430
Subordinated unitholders	(144,162)	(143,048)
General partner	(26,998)	1,588
Total Equity (Deficit)	(18,123)	166,672	179,772	186,945
Total Liabilities and Equity (Deficit)	363,178	233,809
Tesoro Logistics LP
CURRENT ASSETS
Cash and cash equivalents		18,326
Trade		542
Affiliate		11,312
Prepayments		637
Total Current Assets		30,817
NET PROPERTY, PLANT AND EQUIPMENT		136,264
DEPOSITS		1,527
OTHER NONCURRENT ASSETS		1,545
Total Assets		170,153
CURRENT LIABILITIES
Trade		5,727
Affiliate		2,759
Deferred revenue - affiliate		1,775
Accrued interest and financing costs		18
Other current liabilities		860
Total Current Liabilities		11,139
OTHER NONCURRENT LIABILITIES		44
DEBT		50,000
EQUITY (DEFICIT)
Equity of Predecessors		0
Common unitholders		250,430
Subordinated unitholders		(143,048)
General partner		1,588
Total Equity (Deficit)		108,970
Total Liabilities and Equity (Deficit)		170,153
Martinez Crude Oil Marine Terminal (Predecessor)
CURRENT ASSETS
Cash and cash equivalents		0
Trade		0
Affiliate		0
Prepayments		0
Total Current Assets		0
NET PROPERTY, PLANT AND EQUIPMENT		37,825
DEPOSITS		0
OTHER NONCURRENT ASSETS		0
Total Assets		37,825
CURRENT LIABILITIES
Trade		753
Affiliate		56
Deferred revenue - affiliate		0
Accrued interest and financing costs		0
Other current liabilities		1,366
Total Current Liabilities		2,175
OTHER NONCURRENT LIABILITIES		2,621
DEBT		0
EQUITY (DEFICIT)
Equity of Predecessors		33,029
Common unitholders		0
Subordinated unitholders		0
General partner		0
Total Equity (Deficit)		33,029
Total Liabilities and Equity (Deficit)		37,825
Long Beach Assets (Predecessor)
CURRENT ASSETS
Cash and cash equivalents		0
Trade		2,827
Affiliate		805
Prepayments		141
Total Current Assets		3,773
NET PROPERTY, PLANT AND EQUIPMENT		22,058
DEPOSITS		0
OTHER NONCURRENT ASSETS		0
Total Assets		25,831
CURRENT LIABILITIES
Trade		263
Affiliate		46
Deferred revenue - affiliate		0
Accrued interest and financing costs		0
Other current liabilities		849
Total Current Liabilities		1,158
OTHER NONCURRENT LIABILITIES		0
DEBT		0
EQUITY (DEFICIT)
Equity of Predecessors		24,673
Common unitholders		0
Subordinated unitholders		0
General partner		0
Total Equity (Deficit)		24,673
Total Liabilities and Equity (Deficit)		$ 25,831