Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net margins including noncontrolling interest	$ 20,058	$ 8,400	$ 33,288
Other comprehensive income (loss):
Unrealized loss on securities available for sale	127	(333)	(108)
Other comprehensive income (loss)	(371)	992	4,254
Comprehensive income including noncontrolling interest	19,687	9,392	37,542
Net comprehensive income attributable to noncontrolling interest	(9,971)	(8,400)	(6,942)
Comprehensive income attributable to the Association	9,716	992	30,600
Postretirement Medical Benefit Plans
Other comprehensive income (loss):
Unrecognized prior service credit (cost)	0	0	5,698
Unrecognized actuarial gain (loss)	757	32	784
Amortization of actuarial (gain) loss	(84)	102	78
Amortization of prior service cost (credit)	(1,637)	(1,636)	(2,139)
Executive Benefit Restoration Plan
Other comprehensive income (loss):
Unrecognized prior service credit (cost)	0	(308)	(1,050)
Unrecognized actuarial gain (loss)	(909)	1,740	(778)
Amortization of actuarial (gain) loss	219	426	515
Amortization of prior service cost (credit)	1,156	1,156	1,113
Curtailment and settlement	$ 0	$ (187)	$ 141