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Income Tax	12 Months Ended
Income Tax	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	11. Income Taxes We are not a taxable entity for United States federal income tax purposes or for the majority of states that impose an income tax. Taxes on our net income generally are borne by our partners through the allocation of taxable income. Our income tax expense results from state laws that apply to entities organized as partnerships, primarily in the state of Texas. Prior to the Offering, we had no taxable operations in the state of Texas. After the Offering, our income tax expense was $0.1 million for the period ended December 31, 2013. Our effective tax rate for the post-Offering period ended December 31, 2013 was 1.1%. As of December 31, 2013 and December 31, 2012, we had no unrecognized tax benefit liability. No interest or penalties were recognized related to income taxes during the years ended December 31, 2013, 2012 and 2011.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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