Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 26,273	$ 16,172
Accounts and notes receivable-less allowances of $6,077 and $5,132, respectively	168,534	185,664
Regulatory asset for energy commodity derivatives	21,073	24,991
Materials and supplies, fuel stock and stored natural gas	49,259	58,075
Other current assets	44,608	52,632
Total current assets	309,747	337,534
Net Utility Property:
Utility plant in service	5,882,288	5,853,308
Construction work in progress	165,113	157,839
Total	6,047,401	6,011,147
Less: Accumulated depreciation and amortization	1,629,164	1,612,337
Total net utility property	4,418,237	4,398,810
Other Non-current Assets:
Investment in affiliated trusts	11,547	11,547
Goodwill	57,672	57,672
Other property and investments-net	91,536	83,912
Total other non-current assets	160,755	153,131
Deferred Charges:
Regulatory assets for deferred income tax	90,519	90,315
Regulatory assets for pensions and other postretirement benefits	206,637	209,115
Other regulatory assets	128,813	127,328
Regulatory asset for interest rate swaps	151,667	169,704
Non-current regulatory asset for utility derivatives	9,094	18,967
Other deferred charges	9,714	9,828
Total deferred charges	596,444	625,257
Total assets	5,485,183	5,514,732
Current Liabilities:
Accounts payable	67,168	107,289
Current portion of long-term debt	275,066	277,438
Short-term borrowings	50,000	105,398
Utility energy commodity derivative liabilities	9,760	8,848
Taxes Payable, Current	15,845	413
Accrued interest	30,189	16,351
Accrued taxes other than income taxes	45,102	33,802
Deferred natural gas costs	31,148	37,474
Current portion of pensions and other postretirement benefits	10,907	11,544
Current unsettled interest rate swap derivative liabilities	25,086	34,447
Regulatory Liability for Excess Deferred Income Taxes Current	26,242	0
Other current liabilities	83,184	64,498
Total current liabilities	669,697	697,502
Long-term debt and capital leases	1,491,395	1,491,799
Long-term debt to affiliated trusts	51,547	51,547
Regulatory liability for utility plant retirement costs	288,019	285,786
Pensions and other postretirement benefits	200,162	203,566
Deferred income taxes	464,596	466,630
Regulatory Liability for Excess Deferred Income Taxes	413,491	442,319
Other non-current liabilities and deferred credits	147,705	145,099
Total liabilities	3,726,612	3,784,248
Commitments and Contingencies (See Notes to Consolidated Financial Statements)
Avista Corporation Stockholders’ Equity:
Common stock, no par value; 200,000,000 shares authorized; 65,668,477 and 65,494,333 shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively	1,131,549	1,133,448
Accumulated other comprehensive loss	(9,628)	(8,090)
Retained earnings	636,468	604,470
Total Avista Corporation shareholders’ equity	1,758,389	1,729,828
Noncontrolling Interests	182	656
Total equity	1,758,571	1,730,484
Total liabilities and equity	$ 5,485,183	$ 5,514,732