CONSOLIDATED STATEMENTS OF PARTNERS' EQUITY (DEFICIT) - USD ($) shares in Thousands, $ in Thousands	Total	Limited Partners’ Equity	General Partner’s Equity	Special L.P. Interests	Accumulated Other Comprehensive Income (Loss)
Beginning balance, units (in shares) at Dec. 31, 2016		56,201
Beginning balance, value at Dec. 31, 2016	$ 60,519	$ 52,288	$ 0	$ 5,290	$ 2,941
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	215,476	215,474	2
Partnership distribution declared	(194,756)	$ (194,754)	(2)
Issuance of limited partnership units related to compensation (in shares)		158
Issuance of limited partnership units related to compensation	13,021	$ 13,021
Tax effect of units involved in treasury unit transactions	(4,440)	$ (4,440)
Foreign currency translation	(14,849)				(14,849)
Cash flow hedging derivative activity	7,975				7,975
Ending balance, units (in shares) at Dec. 31, 2017		56,359
Ending balance, value at Dec. 31, 2017	82,946	$ 81,589	0	5,290	(3,933)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	126,653	126,652	1
Partnership distribution declared	(203,199)	$ (203,197)	(2)
Issuance of limited partnership units related to compensation (in shares)		205
Issuance of limited partnership units related to compensation	2,940	$ 2,940
Tax effect of units involved in treasury unit transactions	(2,530)	(2,530)
Foreign currency translation	17,240				17,240
Cash flow hedging derivative activity	8,366				8,366
Reclassification of stranded tax effect	0	$ 391			(391)
Ending balance, units (in shares) at Dec. 31, 2018		56,564
Ending balance, value at Dec. 31, 2018	32,416	$ 5,845	(1)	5,290	21,282
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	172,365	172,363	2
Partnership distribution declared	(210,011)	$ (210,009)	(2)
Issuance of limited partnership units related to compensation (in shares)		102
Issuance of limited partnership units related to compensation	8,183	$ 8,183
Tax effect of units involved in treasury unit transactions	(1,383)	$ (1,383)
Foreign currency translation	(11,536)				(11,536)
Cash flow hedging derivative activity	0
Ending balance, units (in shares) at Dec. 31, 2019		56,666
Ending balance, value at Dec. 31, 2019	$ (9,966)	$ (25,001)	$ (1)	$ 5,290	$ 9,746

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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The amount of ownership interest of different classes of partners in limited partnership.

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