Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities
Net margins including noncontrolling interest	$ 63,988	$ 61,324
Adjustments to reconcile net margins to net cash provided by operating activities:
Depreciation, amortization and depletion	116,879	118,620
Amortization of intangible asset	3,662	5,493
Amortization of NRECA Retirement Security Plan prepayment	4,029	4,029
Amortization of debt issuance costs	1,773	2,210
Impairment loss - Nucla	37,067
Deferred Nucla impairment loss	(37,067)
Capital credit allocations from cooperatives and income from coal mines over refund distributions	(486)	(1,493)
Changes in operating assets and liabilities:
Accounts receivable	(155)	(18,721)
Coal inventory	3,922	(27,040)
Materials and supplies	(2,943)	(1,854)
Accounts payable and accrued expenses	3,418	(8,734)
Accrued interest	15,691	17,696
Accrued property taxes	(282)	684
Other	(7,581)	(13,791)
Net cash provided by operating activities	201,915	138,423
Investing activities
Purchases of plant	(149,396)	(199,261)
Changes in deferred charges	(6,277)	(1,547)
Proceeds from other investments	65	64
Net cash used in investing activities	(155,608)	(200,744)
Financing activities
Changes in Member advances	(5,351)	257
Payments of long-term debt	(91,884)	(73,943)
Proceeds from issuance of long-term debt	34,910	60,000
Debt issuance costs	(13)
Increase in short-term borrowings, net	23,036	61,530
Retirement of patronage capital	(11,101)	(4,852)
Equity distribution to noncontrolling interest	(2,806)	(4,413)
Other	(257)	(1,545)
Net cash provided by (used in) financing activities	(53,466)	37,034
Net decrease in cash, cash equivalents and restricted cash and investments	(7,159)	(25,287)
Cash, cash equivalents and restricted cash and investments – beginning	127,590	150,965
Cash, cash equivalents and restricted cash and investments – ending	120,431	125,678
Supplemental cash flow information:
Cash paid for interest	103,782	102,916
Supplemental disclosure of noncash investing and financing activities:
Change in plant expenditures included in accounts payable	$ (873)	$ 67