v3.10.0.1
SERIES D CUMULATIVE CONVERTIBLE PREFERRED UNITS (Tables)
9 Months Ended
Sep. 30, 2018
Temporary Equity Disclosure [Abstract]  
Changes to Mezzanine Equity [Table Text Block]
The following table summarizes changes to our mezzanine equity:
 
Three Months Ended September 30, 2018
 
Nine Months Ended September 30, 2018
 
(Thousands of Dollars)
Beginning balance
$
370,711

 
$

Net income
13,848

 
14,060

Distributions to partners
(13,848
)
 
(14,060
)
Issuance of units
185,102

 
555,813

Series D Preferred Unit accretion
4,031

 
4,031

Ending balance
$
559,844

 
$
559,844