Organization and Basis of Presentation (Details) (Common units)	0 Months Ended	1 Months Ended
Nov. 09, 2012	Oct. 30, 2012
Common units
Initial public offering
Common units issued, net of over-allotment option		6,000,000
Common units exercised by underwriters under over-allotment option	900,000

Total change in each class of partners' capital accounts during the year due to the exercise of over-allotment option granted to underwriters. All partners include general, limited and preferred partners.

No definition available.

Name:	lgp_PartnersCapitalAccountSaleOfUnitsOverAllotmentOptionExercisedByUnderwriters
Namespace Prefix:	lgp_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration