Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 8,507	$ 10,484
Accounts and notes receivable-less allowances of $5,026 and $4,530, respectively	180,265	169,413
Regulatory asset for energy commodity derivatives	11,365	17,260
Materials and supplies, fuel stock and stored natural gas	53,314	54,148
Income taxes receivable	48,265	24,121
Other current assets	49,625	30,620
Total current assets	351,341	306,046
Net Utility Property:
Utility plant in service	5,506,499	5,129,192
Construction work in progress	150,474	202,683
Total	5,656,973	5,331,875
Less: Accumulated depreciation and amortization	1,509,473	1,433,286
Total net utility property	4,147,500	3,898,589
Other Non-current Assets:
Investment in affiliated trusts	11,547	11,547
Goodwill	57,672	57,672
Long-term energy contract receivable	0	14,694
Other property and investments-net and other non-current assets	72,224	59,733
Total other non-current assets	141,443	143,646
Deferred Charges:
Regulatory Asset for Deferred Income Taxes, Noncurrent	109,853	101,240
Regulatory assets for pensions and other postretirement benefits	240,114	235,009
Other regulatory assets	135,751	99,798
Regulatory Asset For Interest Rate Swap Agreements Noncurrent	161,508	83,973
Non-current regulatory asset for energy commodity derivatives	16,919	32,420
Other deferred charges	5,326	5,928
Total deferred charges	669,471	558,368
Total assets	5,309,755	4,906,649
Current Liabilities:
Accounts payable	115,545	114,349
Current portion of long-term debt and capital leases	3,287	93,167
Short-term borrowings	120,000	105,000
Energy commodity derivative liabilities	7,035	14,268
Accrued Interest, Current	15,869	15,378
Accrued Taxes Other than Income Taxes, Current	33,374	30,978
Deferred natural gas costs	30,820	17,880
Pension and Other Postretirement Benefit, Current	10,994	10,233
Other current liabilities	70,604	73,427
Total current liabilities	407,528	474,680
Long-term debt and capital leases	1,678,717	1,480,111
Long-term debt to affiliated trusts	51,547	51,547
Regulatory liability for utility plant retirement costs	273,983	261,594
Pensions and other postretirement benefits	226,552	201,453
Deferred income taxes	840,928	747,477
Non-current interest rate swap derivative liabilities	28,705	30,679
Other non-current liabilities, regulatory liabilities and deferred credits	153,319	130,821
Total liabilities	3,661,279	3,378,362
Commitments and Contingencies (See Notes to Consolidated Financial Statements)
Avista Corporation Shareholders’ Equity:
Common stock, no par value; 200,000,000 shares authorized; 64,187,934 and 62,312,651 shares issued and outstanding as of December 31, 2016 and December 31, 2015, respectively	1,075,281	1,004,336
Accumulated other comprehensive loss	(7,568)	(6,650)
Retained earnings	581,014	530,940
Total Avista Corporation shareholders’ equity	1,648,727	1,528,626
Noncontrolling Interests	(251)	(339)
Total equity	1,648,476	1,528,287
Total liabilities and equity	$ 5,309,755	$ 4,906,649