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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
 2 Months Ended 10 Months Ended 12 Months Ended
Dec. 31, 2012
Nov. 05, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Contingency [Line Items]          
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate     $ 4,047 $ 6,304 $ 5,316
Current Income Tax Expense (Benefit)     4,738 9,691 4,844
Deferred Income Tax Expense (Benefit)     (18,762) (4,328) 258
Income Tax Reconciliation, Permanent Differences     300 15 (218)
Income Tax Expense (Benefit) 64 (14,088) (14,024) 5,363 5,102
Deferred Tax Liabilities, Property, Plant and Equipment (36)   (36) (17,011)  
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals 1   1 60  
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Tank and pipeline inspection liabilities 2   2 113  
Deferred Tax Assets, Operating Loss Carryforwards 0   0 626  
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost 0   0 237  
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Asset Retirement Obligations 1   1 280  
Deferred Tax Assets, Derivative Instruments 0   0 (6)  
Deferred Tax Assets, Deferred Income 0   0 343  
Deferred tax Assets, Non-Current, Tank Inspection Liability 6   6 1,145  
Deferred Tax Asset, Non-Current, Contingent Liabilities 13   13 1,684  
Deferred Tax Asset, State Bonus Depreciation 0   0 129  
Deferred Tax Liabilities, Other (1)   (1) (11)  
Deferred Tax Assets, Valuation Allowance, Noncurrent 0   0 (6,914)  
Deferred Tax Liabilities, Net, Noncurrent (17)   (17) (19,498)  
Deferred Tax Liabilities, Net (3)   (3) (18,765)  
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies 11   11 632  
Deferred Tax Assets, Valuation Allowance, Current 0   0 (72)  
Deferred Tax Assets, Net of Valuation Allowance, Current 14   14 733  
Tax benefit from conversion to Partnership     18,534    
Income Tax Reconciliation, Other Adjustments     28 (66) (28)
Income Tax Reconciliation, State and Local Income Taxes     (58) 255 32
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance     $ 193 $ (1,145) $ 0