Benefit Plans (Notes)

12 Months Ended

Dec. 31, 2012

Benefit Plans [Abstract]

Benefit Plans

BENEFIT PLANS

Employees supporting our operations participate in the benefit plans and the employee thrift plan of Tesoro. The Predecessors were allocated expenses for costs associated with the benefit plans primarily based on the percentage of the Predecessors' allocated salaries compared to Tesoro's total salaries. Tesoro, subsequent to the Initial Offering, allocates expense for costs associated with the benefit plans based on the salaries of Tesoro's employees that provide services to TLLP as a percentage of total Tesoro salaries. These employee benefit plan expenses and the related payroll costs are included in operating expenses and general and administrative expenses in our statements of combined consolidated operations and include amounts allocated to the Predecessors. Our portion of our Sponsor's employee benefit plan expenses were $2.9 million, $1.9 million and $1.0 million for the years ended December 31, 2012, 2011 and 2010, respectively.