Condensed Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Consolidated net income	$ 5,446	$ 2,488
Change in unrealized gain (loss) on investments:
Changes arising during current period, net of tax benefit (expense) of $251 and ($1,301), respectively	(349)	5,942
Reclassification for gain included in net income, net of tax expense of $1,373 and $0, respectively	(2,296)	0
Change in unrealized gain (loss) on investments:	(2,645)	5,942
Change in cumulative translation adjustment:
Changes arising during current period	(1,222)	869
Change in retirement plan actuarial losses:
Reclassification for gain included in net income, net of tax expense (benefit) of $0 for the three months ended December 31, 2013 and 2012	27	25
Change in retirement plan transition obligation:
Reclassification for gain included in net income, net of tax expense (benefit) of $0 for the three months ended December 31, 2013 and 2012	(15)	(15)
Other comprehensive income (loss)	(3,855)	6,821
Comprehensive income	1,591	9,309
Comprehensive (income) loss attributable to noncontrolling interest	(11)	11
Comprehensive income attributable to ISSI	$ 1,580	$ 9,320