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Equity Distributions Earned (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Distributions Earned by Limited or General Partners [Line Items]
General partner's distributions	$ 325	$ 282	$ 940	$ 816
General partner's IDRs	3,057	1,032	7,503	2,396
Total general partner's distributions	3,382	1,314	8,443	3,212
Total limited partners' distributions	15,920	13,822	46,039	39,994
Total cash distributions	$ 19,302	$ 15,136	$ 54,482	$ 43,206
Cash distributions per limited partner unit	$ 0.655	$ 0.570	$ 1.895	$ 1.650
Limited Partner [Member] | Common Units [Member]
Distributions Earned by Limited or General Partners [Line Items]
Total limited partners' distributions	$ 15,920	$ 6,983	$ 41,615	$ 20,196
Limited Partner [Member] | Subordinated Units [Member]
Distributions Earned by Limited or General Partners [Line Items]
Total limited partners' distributions	$ 0	$ 6,839	$ 4,424	$ 19,798

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- Definition

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

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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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

Reference 3: 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)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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

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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)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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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)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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The total amount of distributions to limited partners.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB TOPIC 4.F)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

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