Consolidated Statements of Patronage Capital and Membership Fees (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Increase (Decrease) in Members' Capital
Net margin	$ 21,980	$ 25,958
Patronage Capital and Membership Fees
Increase (Decrease) in Members' Capital
Beginning balance	1,130,423	1,072,642
Net margin	21,980	25,958
Ending balance	$ 1,152,403	$ 1,098,600