Statement of Member's Equity (Unaudited) - USD ($) $ in Thousands	Total	MEMBER'S CAPITAL	RETAINED EARNINGS
Balance at beginning and end of period at Dec. 31, 2017		$ 1,073,892	$ 89,289
Net income	$ 97,071		97,071
Cash distributions to parent	(87,000)		(87,000)
Balance at end of period at Sep. 30, 2018	1,173,252		99,360
Balance at beginning and end of period at Jun. 30, 2018		1,073,892	73,906
Net income	25,454		25,454
Cash distributions to parent			0
Balance at end of period at Sep. 30, 2018	1,173,252		99,360
Balance at beginning and end of period at Dec. 31, 2018	1,120,642	1,073,892	46,750
Net income	108,583		108,583
Cash distributions to parent	(78,000)		(78,000)
Balance at end of period at Sep. 30, 2019	1,151,225		77,333
Balance at beginning and end of period at Jun. 30, 2019		$ 1,073,892	76,827
Net income	32,506		32,506
Cash distributions to parent			(32,000)
Balance at end of period at Sep. 30, 2019	$ 1,151,225		$ 77,333