Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 13,043	$ 10,471	$ 84,779	$ 160,034
Other Comprehensive Income (Loss):
Unrealized investment gains/(losses) - net of taxes			0	1,126
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax			0	(2)
Other Comprehensive Loss Reclassification Adjustment From AOCI For Sale Of Securities, Net of Tax			0	462
Change in unfunded benefit obligation for pension and other postretirement benefit plans - net of taxes	246	112	737	335
Total other comprehensive loss	246	112	737	1,921
Comprehensive income	13,289	10,583	85,516	161,955
Comprehensive income attributable to noncontrolling interests	(32)	(20)	(73)	(213)
Comprehensive income attributable to Avista Corporation shareholders	$ 13,257	$ 10,563	$ 85,443	$ 161,742