Condensed Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Consolidated net income	$ 8,958	$ 3,280	$ 14,404	$ 5,768
Change in unrealized gain (loss) on investments:
Changes arising during current period, net of tax benefit (expense) of $0, ($5,451), $251 and ($6,752), respectively	0	3,993	(349)	9,935
Reclassification for gain included in net income, net of tax expense of $1,624, $136, $2,997 and $136, respectively	(2,709)	(668)	(5,005)	(668)
Change in unrealized gain (loss) on investments:	(2,709)	3,325	(5,354)	9,267
Change in cumulative translation adjustment:
Changes arising during current period	(2,787)	(3,208)	(4,009)	(2,339)
Change in retirement plan actuarial losses:
Reclassification for gain included in net income, net of tax expense (benefit) of $0 for the three and six months ended March 31, 2014 and 2013	28	25	55	50
Change in retirement plan transition obligation:
Reclassification for gain included in net income, net of tax expense (benefit) of $0 for the three and six months ended March 31, 2014 and 2013	(15)	(15)	(30)	(30)
Other comprehensive income (loss)	(5,483)	127	(9,338)	6,948
Comprehensive income	3,475	3,407	5,066	12,716
Comprehensive (income) loss attributable to noncontrolling interest	(146)	7	(157)	18
Comprehensive income attributable to ISSI	$ 3,329	$ 3,414	$ 4,909	$ 12,734