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Equity Distributions Earned (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Distributions Earned by Limited or General Partners [Line Items]
General partner's distributions	$ 302	$ 262
General partner's IDRs	1,984	606
Total general partner's distributions	2,286	868
Total limited partners' distributions	14,809	12,834
Total cash distributions	$ 17,095	$ 13,702
Cash distributions per limited partner unit	$ 0.610	$ 0.530
Limited Partner [Member] | Common Units [Member]
Distributions Earned by Limited or General Partners [Line Items]
Total limited partners' distributions	$ 10,385	$ 6,475
Limited Partner [Member] | Subordinated Units [Member]
Distributions Earned by Limited or General Partners [Line Items]
Total limited partners' distributions	$ 4,424	$ 6,359

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- Definition

The amount of cash distributions declared to partners by a limited partnership.

+ References

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- Definition

The total amount of distributions to the general partner during the period, including IDRs.

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- Definition

Per unit of ownership amount of cash distributions declared to unit-holder of a 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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Section S99
-Paragraph 1
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The total amount of distributions to the general partner during the period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
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- Definition

Amount of incentive obligation paid in cash or stock during the period to a limited liability corporation managing member or limited partnership general partner.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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The total amount of distributions to limited partners.

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