v3.8.0.1

NEW ACCOUNTING PRONOUNCEMENTS Narrative (Details) | 3 Months Ended
--- | ---
Mar. 31, 2018
Revenue Recognition [Member] | Subsequent Event [Member] |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
New accounting pronouncement, transition adjustment | The transition adjustment related to the adoption was immaterial (less than 1% of total revenues for the year ended December 31, 2017 and total partners’ equity as of December 31, 2017), and we do not expect the adoption of this standard to materially impact the amount or timing of our revenue going forward.

X
- Definition A description of the fact that the effect (or portion of the effect) of initially applying the pending content is not significant or not practicable to estimate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6368906&loc=d3e21697-107793 + Details
Name: | us-gaap_NewAccountingPronouncementTransitionGuidanceNotSignificantOrNotPractical
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201409Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |