Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Common Stock, Dividends, Per Share, Cash Paid	$ 0.3425	$ 0.33
Operating Revenues:
Utility revenues	$ 412,793	$ 436,407
Other non-utility revenues	5,380	10,083
Total operating revenues	418,173	446,490
Utility operating expenses:
Resource costs	161,719	209,560
Other operating expenses	75,779	73,172
Depreciation and amortization	39,192	34,300
Taxes other than income taxes	29,385	29,898
Other non-utility operating expenses:
Other operating expenses	5,825	9,816
Depreciation and amortization	188	169
Total operating expenses	312,088	356,915
Income from operations	106,085	89,575
Interest expense	21,273	19,902
Interest expense to affiliated trusts	138	112
Public Utilities, Allowance for Funds Used During Construction, Additions	(914)	(917)
Other income-net	(2,422)	(2,231)
Income before income taxes	88,010	72,709
Income taxes	31,942	26,247
Net income	56,068	46,462
Net income attributable to noncontrolling interests	(16)	(13)
Income (Loss) from Continuing Operations Attributable to Parent	56,052	46,449
Net income attributable to Avista Corporation shareholders	$ 56,052	$ 46,449
Weighted-average common shares outstanding (thousands), basic	62,605	62,318
Weighted-average common shares outstanding (thousands), diluted	62,907	62,889
Earnings per common share attributable to Avista Corporation shareholders:
Basic	$ 0.90	$ 0.75
Diluted (usd per share)	$ 0.89	$ 0.74