Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Cost of product	[1]	$ 103,270	$ 114,063
Operation and maintenance	[1]	159,191	142,829
General and administrative	[1]	40,465	22,844
Affiliates [Member]
Cost of product		77,903	56,172
Operation and maintenance		32,841	39,141
General and administrative		$ 21,855	$ 18,894

[1] Cost of product includes product purchases from related parties (as defined in Note 1) of $77.9 million and $56.2 million for the three months ended March 31, 2020 and 2019, respectively. Operation and maintenance includes charges from related parties of $32.8 million and $39.1 million for the three months ended March 31, 2020 and 2019, respectively. General and administrative includes charges from related parties of $21.9 million and $18.9 million for the three months ended March 31, 2020 and 2019, respectively. See Note 6.