STATEMENTS OF CHANGES IN MEMBERS' EQUITY - USD ($) $ in Thousands	Members' Equity	Total
BALANCE at Dec. 31, 2016	$ 23,616	$ 23,616
Increase (Decrease) in Stockholders' Equity
Net income	9,182	9,182
Member distributions	(6,552)	(6,552)
BALANCE at Dec. 31, 2017	26,246	26,246
Increase (Decrease) in Stockholders' Equity
Net income	6,421	6,421
Member distributions	(6,831)	(6,831)
BALANCE at Dec. 31, 2018	25,836	25,836
Increase (Decrease) in Stockholders' Equity
Net income	7,235	7,235
Member distributions	(6,692)	(6,692)
BALANCE at Dec. 31, 2019	$ 26,379	$ 26,379