Consolidated Statement of Partners' Capital Statement - USD ($) $ in Thousands	Total	Limited Partners	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2017	$ 2,129,653	$ 2,267,231	$ (137,578)
Comprehensive income:
Net income	210,910	210,910
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	5,279		5,279
Comprehensive income	216,189	210,910	5,279
Distributions	(209,940)	(209,940)
Equity-based incentive compensation expense	6,632	6,632
Issuance of limited partner units in settlement of equity-based incentive plan awards	120	120
Payments associated with settlement of equity-based incentive compensation	(9,285)	(9,285)
Other	(157)	(157)
Ending balance at Mar. 31, 2018	2,139,187	2,271,486	(132,299)
Beginning balance at Dec. 31, 2018	2,643,434	2,763,925	(120,491)
Comprehensive income:
Net income	207,663	207,663
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(2,446)		(2,446)
Comprehensive income	205,217	207,663	(2,446)
Distributions	(227,832)	(227,832)
Equity-based incentive compensation expense	4,914	4,914
Issuance of limited partner units in settlement of equity-based incentive plan awards	480	480
Payments associated with settlement of equity-based incentive compensation	(9,764)	(9,764)
Other	(194)	(194)
Ending balance at Mar. 31, 2019	$ 2,616,255	$ 2,739,192	$ (122,937)