Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Activities:
Net Margin including Non-controlling interest	$ 2,969	$ 2,952
Adjustments to reconcile net margin to net cash provided by operating activities:
Depreciation and amortization	11,343	11,538
Other non-cash charges	4,769	4,424
Amortization of lease obligations	1,685	1,573
Interest on lease deposits	(751)	(737)
Change in current assets	17,156	13,384
Change in deferred energy	(21,538)	1,545
Change in current liabilities	6,854	9,802
Change in regulatory assets and liabilities	(418)	(1,212)
Change in deferred charges-other and deferred credits and other liabilities-other	(833)	594
Net Cash Provided by Operating Activities	21,236	43,863
Investing Activities:
Purchases of held to maturity securities	(2,523)
Proceeds from sale of held to maturity securities	2,000
Increase in other investments	(1,499)	(42)
Electric plant additions	(51,290)	(75,992)
Net Cash Used for Investing Activities	(53,312)	(76,034)
Financing Activities:
Draws on revolving credit facility	183,250
Repayments on revolving credit facility	(153,500)
Net Cash Provided by Financing Activities	29,750
Net Change in Cash and Cash Equivalents	(2,326)	(32,171)
Cash and Cash Equivalents - Beginning of Period	2,946	58,383
Cash and Cash Equivalents - End of Period	$ 620	$ 26,212