Consolidated Statements of Patronage Capital and Membership Fees (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Increase (Decrease) in Members' Capital
Net margin	$ 42,099	$ 24,410
Patronage Capital and Membership Fees
Increase (Decrease) in Members' Capital
Beginning balance	1,257,917	1,192,127
Net margin	42,099	24,410
Ending balance	$ 1,300,016	$ 1,216,537