v3.8.0.1

ACQUISITIONS Narrative 2 (Details) - USD ($) $ in Thousands			12 Months Ended
	Apr. 28, 2017	Apr. 18, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
General partner ownership interest			2.00%	2.00%	2.00%
Common Limited Partner [Member]
Business Acquisition [Line Items]
Issuance of units (units)		14,375,000	14,375,000	595,050
Net proceeds from issuance of units			$ 643,878	$ 27,710
General Partner [Member]
Business Acquisition [Line Items]
Net proceeds from issuance of units		$ 13,600	$ 13,597	$ 575
General partner ownership interest			2.00%
Series B Preferred Limited Partner [Member]
Business Acquisition [Line Items]
Issuance of units (units)	15,400,000
Net proceeds from issuance of units	$ 371,800
5.625% senior notes
Business Acquisition [Line Items]
Senior notes issued	$ 550,000
Stated interest rate	5.625%		5.625%

X

- Definition

The general partner ownership interest (ownership percentage) in the limited partnership. Excludes other ownership interests held by the general partner in the limited partnership.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
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Contractual interest rate for funds borrowed, under the debt agreement.

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-SubTopic 10
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- Definition

Total change in each class of partners' capital accounts during the year due to the sale of units. All partners include general, limited and preferred partners.

+ References

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-Publisher FASB
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Total units issued during the year due to the sale of units. All partners include general, limited and preferred partners.

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