Partnership Operations, Organization and Basis of Presentation (Details)	12 Months Ended	3 Months Ended
	Dec. 31, 2014 Segment Fractionator Platform Plant mi bbl ft3	Dec. 31, 2014	Oct. 02, 2014 bbl
Partnership Operations, Organization and Basis of Presentation [Abstract]
Number of miles of onshore and offshore pipelines	51,300	51,300
Number of barrels of storage capacity	225,000,000	225,000,000
Number of cubic feet of storage capacity	14,000,000,000	14,000,000,000
Number of natural gas processing plants	24	24
Number of fractionators	22	22
Number of offshore hub platforms	6	6
Number of reportable segments	5
Limited partners ownership interest (in hundredths)	100.00%
Oiltanking Partners L.P. [Member]
Partnership Operations, Organization and Basis of Presentation [Abstract]
Number of barrels of storage capacity			26,000,000
Business Acquisition [Line Items]
Common units acquired (in units)		15,899,802
Subordinated units acquired (in units)		38,899,802