SUBSEQUENT EVENTS (Details) (Dividend declared, USD $)	0 Months Ended
May 21, 2013	Apr. 25, 2013
Dividend declared
Subsequent Events
Common unit distribution announced (in dollars per share)		$ 0.27
Common unit distribution paid (in dollars per share)	$ 0.27

Per-share or per-unit cash distributions declared to a common shareholder or unit-holder by an LLC or LP.

No definition available.

Name:	us-gaap_DistributionMadeToMemberOrLimitedPartnerDistributionsDeclaredPerUnit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration