Consolidated Statements of Patronage Capital and Membership Fees (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Increase (Decrease) in Members' Capital
Net margin	$ 24,410	$ 21,980
Patronage Capital and Membership Fees
Increase (Decrease) in Members' Capital
Beginning balance	1,192,127	1,130,423
Net margin	24,410	21,980
Ending balance	$ 1,216,537	$ 1,152,403