Subsequent Events

3 Months Ended

Mar. 31, 2012

Subsequent Events [Abstract]

Subsequent Events [Text Block]

11.    Subsequent Events

Declaration of Distributions

The General Partner's board of directors declared the following distributions at its regularly scheduled board meeting held on April 25, 2012:

Class	Quarterly Amount/Unit	Record Date	Payment Date
Common	$0.17	May 16, 2012	May 31, 2012
Preferred (per depositary unit):
Series J	$0.414063	May 16, 2012	May 31, 2012
Series K	$0.406250	May 16, 2012	May 31, 2012
Series L	$0.412500	May 16, 2012	May 31, 2012
Series O	$0.523437	June 15, 2012	July 2, 2012