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Equity - Incentive Distribution Rights (Details) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Equity [Abstract]
General partner's ownership interest (as percent)	2.00%	2.00%
Minimum quarterly distribution
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Target Quarterly Distribution per Unit (in dollars per share)	$ 0.37500
Minimum quarterly distribution | Common unitholders
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions (as percent)	98.00%
Minimum quarterly distribution | General Partner
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions (as percent)	2.00%
First target distribution | Minimum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Target Quarterly Distribution per Unit (in dollars per share)	$ 0.37500
First target distribution | Maximum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Target Quarterly Distribution per Unit (in dollars per share)	$ 0.43125
First target distribution | Common unitholders
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions (as percent)	98.00%
First target distribution | General Partner
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions (as percent)	2.00%
Second target distribution | Minimum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Target Quarterly Distribution per Unit (in dollars per share)	$ 0.43125
Second target distribution | Maximum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Target Quarterly Distribution per Unit (in dollars per share)	$ 0.46875
Second target distribution | Common unitholders
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions (as percent)	85.00%
Second target distribution | General Partner
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions (as percent)	15.00%
Third target distribution | Minimum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Target Quarterly Distribution per Unit (in dollars per share)	$ 0.46875
Third target distribution | Maximum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Target Quarterly Distribution per Unit (in dollars per share)	$ 0.56250
Third target distribution | Common unitholders
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions (as percent)	75.00%
Third target distribution | General Partner
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions (as percent)	25.00%
Thereafter
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Target Quarterly Distribution per Unit (in dollars per share)	$ 0.56250
Thereafter | Common unitholders
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions (as percent)	50.00%
Thereafter | General Partner
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions (as percent)	50.00%

X

- Definition

Total quarterly distribution payment target amount

+ References

No definition available.

+ Details

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X

- Definition

Percentage split between the limited partners' and general partner's interests in distributions.

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

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