PARTNERS' EQUITY (Tables)

6 Months Ended

Jun. 30, 2021

Distribution Made to Preferred Limited Partner [Line Items]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The balance of and changes in the components included in AOCI were as follows:


	Three Months Ended June 30,
	2021								2020
	Foreign Currency Translation		Cash Flow Hedges		Pension and Other Postretirement Benefits		Total		Foreign Currency Translation		Cash Flow Hedges		Pension and Other Postretirement Benefits		Total
	(Thousands of Dollars)
Balance as of March 31	$	(41,405)	$	(40,802)	$	(12,329)	$	(94,536)	$	(50,600)	$	(45,307)	$	(8,302)	$	(104,209)
Other comprehensive income (loss):
Other comprehensive income (loss) before reclassification adjustments	1,094		—		—		1,094		2,638		(461)		—		2,177
Net gain on pension costs reclassified into other income, net	—		—		(187)		(187)		—		—		(305)		(305)
Net loss on cash flow hedges reclassified into interest expense, net	—		1,335		—		1,335		—		878		—		878
Other	—		—		2		2		—		—		4		4
Other comprehensive income (loss)	1,094		1,335		(185)		2,244		2,638		417		(301)		2,754
Balance as of June 30	$	(40,311)	$	(39,467)	$	(12,514)	$	(92,292)	$	(47,962)	$	(44,890)	$	(8,603)	$	(101,455)


	Six Months Ended June 30,
	2021								2020
	Foreign Currency Translation		Cash Flow Hedges		Pension and Other Postretirement Benefits		Total		Foreign Currency Translation		Cash Flow Hedges		Pension and Other Postretirement Benefits		Total
	(Thousands of Dollars)
Balance as of January 1	$	(42,362)	$	(42,150)	$	(12,144)	$	(96,656)	$	(43,772)	$	(16,124)	$	(8,000)	$	(67,896)
Other comprehensive income (loss):
Other comprehensive income (loss) before reclassification adjustments	2,051		—		—		2,051		(4,190)		(30,291)		—		(34,481)
Net gain on pension costs reclassified into other income, net	—		—		(374)		(374)		—		—		(610)		(610)
Net loss on cash flow hedges reclassified into interest expense, net	—		2,683		—		2,683		—		1,525		—		1,525
Other	—		—		4		4		—		—		7		7
Other comprehensive income (loss)	2,051		2,683		(370)		4,364		(4,190)		(28,766)		(603)		(33,559)
Balance as of June 30	$	(40,311)	$	(39,467)	$	(12,514)	$	(92,292)	$	(47,962)	$	(44,890)	$	(8,603)	$	(101,455)

Preferred Limited Partner [Member]

Distribution Made to Preferred Limited Partner [Line Items]

Distributions Made to Limited Partner, by Distribution [Table Text Block]

Distributions on our Series A, B and C Preferred Units are payable out of any legally available funds, accrue and are cumulative from the original issuance dates, and are payable on the 15th day (or next business day) of each of March, June, September and December of each year to holders of record on the first business day of each payment month as follows (until the distribution rate changes to a floating rate):


Units	Fixed Distribution Rate Per Unit Per Quarter		Fixed Distribution Per Quarter		Date at Which Distribution Rate Becomes Floating
			(Thousands of Dollars)
Series A Preferred Units	$	0.53125	$	4,813	December 15, 2021
Series B Preferred Units	$	0.47657	$	7,339	June 15, 2022
Series C Preferred Units	$	0.56250	$	3,881	December 15, 2022

Common Limited Partner [Member]

Distribution Made to Preferred Limited Partner [Line Items]

Distributions Made to Limited Partner, by Distribution [Table Text Block]

The following table summarizes information about quarterly cash distributions declared for our common limited partners:


Quarter Ended	Cash Distributions Per Unit		Total Cash Distributions		Record Date	Payment Date
			(Thousands of Dollars)

June 30, 2021	$	0.40	$	43,814	August 6, 2021	August 12, 2021
March 31, 2021	$	0.40	$	43,834	May 10, 2021	May 14, 2021
December 31, 2020	$	0.40	$	43,787	February 8, 2021	February 12, 2021