Consolidated Statements Of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Assignable margins	$ 2,300,426	$ 2,117,425
Adjustments to reconcile assignable margins to net cash provided by operating activities:
Depreciation and amortization	14,737,296	18,956,671
Amortization and depreciation cleared to operating expenses	2,517,243	2,262,909
Allowance for funds used during construction	(51,998)	(25,664)
Write off of inventory, deferred charges and projects	127,681	367,217
Other	208,450	(84,353)
(Increase) decrease in assets:
Accounts receivable, net	9,255,648	4,054,506
Fuel cost under-recovery	3,250,815	(1,973,718)
Materials and supplies	(886,757)	2,267,603
Fuel stock	(2,097,957)	(2,443,387)
Prepayments	1,736,547	(1,571,069)
Other assets	76,595	108,582
Deferred charges	(2,458,074)	(600,451)
Increase (decrease) in liabilities:
Accounts payable	1,280,213	(507,757)
Consumer deposits	(251,886)	(117,854)
Fuel cost over-recovery	0	(3,824,722)
Accrued interest	(308,527)	110,678
Salaries, wages and benefits	987,178	300,444
Fuel	(2,103,131)	2,695,984
Other current liabilities	(94,221)	27,787
Deferred liabilities	(3,698)	0
Net cash provided by operating activities	28,221,843	22,120,831
Cash flows from investing activities:
Return of capital from investment in associated organizations	414,012	370,010
Investment in special funds	(296,047)	0
Investment in marketable securities and investments-other	(1,423,399)	(1,156,286)
Proceeds from the sale of marketable securities	1,672,465	0
Extension and replacement of plant	(9,708,321)	(15,383,495)
Net cash used in investing activities	(9,341,290)	(16,169,771)
Cash flows from financing activities:
Payments for debt issue costs	0	(184,778)
Net increase (decrease) in short-term obligations	3,000,000	(26,200,000)
Proceeds from long-term obligations	0	40,000,000
Repayments of long-term obligations	(25,012,667)	(23,240,667)
Memberships and donations received	158,730	151,663
Retirement of patronage capital and estate payments	(395,252)	(363,758)
Net receipts on consumer advances for construction	2,162,439	2,099,920
Net cash used in financing activities	(20,086,750)	(7,737,620)
Net change in cash, cash equivalents, and restricted cash equivalents	(1,206,197)	(1,786,560)
Cash, cash equivalents, and restricted cash equivalents at beginning of period	7,201,759	6,383,217
Cash, cash equivalents, and restricted cash equivalents at end of period	5,995,562	4,596,657
Supplemental disclosure of non-cash investing and financing activities:
Cost of removal obligation	1,231,344	1,486,311
Extension and replacement of plant included in accounts payable	2,470,626	1,492,872
Patronage capital retired/net transferred and included in other current liabilities	2,000,000	0
Supplemental disclosure of cash flow information - interest expense paid, net of amounts capitalized	$ 10,725,424	$ 10,359,194