Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Consolidated Statements of Comprehensive Income
Net margins including noncontrolling interest	$ 5,168	$ 2,666	$ 28,990	$ 20,251
Other comprehensive income (loss):
Unrealized gain (loss) on securities available for sale	22	21	46	(1)
Amortization of actuarial gain on postretirement benefit obligation included in net income	(19)	(23)	(39)	(45)
Other comprehensive income (loss)	3	(2)	7	(46)
Comprehensive income including noncontrolling interest	5,171	2,664	28,997	20,205
Net comprehensive income attributable to noncontrolling interest	(377)	(129)	(673)	(181)
Comprehensive income attributable to the Association	$ 4,794	$ 2,535	$ 28,324	$ 20,024