Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 10,391	$ 82,574
Accounts and notes receivable-less allowances of $4,331 and $44,309, respectively	124,550	221,343
Utility energy commodity derivative assets	3,334	3,022
Regulatory asset for utility derivatives	1,724	10,829
Investments and funds held for clients	0	96,688
Materials and supplies, fuel stock and natural gas stored	69,941	44,946
Deferred income taxes	8,316	24,788
Income taxes receivable	8,428	7,783
Other current assets	38,520	57,706
Total current assets	265,204	549,679
Net Utility Property:
Utility plant in service	4,655,329	4,290,464
Construction work in progress	205,572	160,323
Total	4,860,901	4,450,787
Less: Accumulated depreciation and amortization	1,322,927	1,248,362
Total net utility property	3,537,974	3,202,425
Other Non-current Assets:
Investment in exchange power-net	12,046	13,883
Investment in affiliated trusts	11,547	11,547
Goodwill	55,877	76,257
Intangible assets-net of accumulated amortization of $0 and $36,634, respectively	0	39,576
Long-term energy contract receivable of Spokane Energy	31,405	40,619
Other property and investments-net	41,331	58,555
Total other non-current assets	152,206	240,437
Deferred Charges:
Regulatory assets for deferred income tax	64,322	71,421
Regulatory assets for pensions and other postretirement benefits	151,647	156,984
Other regulatory assets	121,760	102,915
Non-current utility energy commodity derivative assets	1,693	854
Non-current regulatory asset for utility derivatives	13,153	23,258
Other deferred charges	28,387	13,950
Total deferred charges	380,962	369,382
Total assets	4,336,346	4,361,923
Current Liabilities:
Accounts payable	82,366	182,088
Client fund obligations	0	99,117
Current portion of long-term debt	6,471	358
Current portion of nonrecourse long-term debt of Spokane Energy	5,666	16,407
Short-term borrowings	35,000	171,000
Utility energy commodity derivative liabilities	5,009	10,875
Taxes Payable, Current	7,581	697
Other current liabilities	128,726	144,798
Total current liabilities	270,819	625,340
Long-term debt	1,412,211	1,272,425
Nonrecourse long-term debt of Spokane Energy	0	1,431
Long-term debt to affiliated trusts	51,547	51,547
Long-term borrowings under committed line of credit	0	46,000
Regulatory liability for utility plant retirement costs	254,162	242,850
Pensions and other postretirement benefits	95,037	122,513
Deferred income taxes	640,260	535,343
Other non-current liabilities and deferred credits	120,553	130,318
Total liabilities	2,844,589	3,027,767
Commitments and Contingencies (See Notes to Consolidated Financial Statements)
Redeemable Noncontrolling Interests	0	15,889
Avista Corporation Stockholders’ Equity:
Common stock, no par value; 200,000,000 shares authorized; 62,838,628 and 60,076,752 shares outstanding, respectively	1,007,764	896,993
Accumulated other comprehensive loss	(3,898)	(5,819)
Retained earnings	488,342	407,092
Total Avista Corporation stockholders’ equity	1,492,208	1,298,266
Noncontrolling Interests	(451)	20,001
Total equity	1,491,757	1,318,267
Total liabilities and equity	$ 4,336,346	$ 4,361,923