Consolidated Statements of Comprehensive Income (Parentheticals) (USD $)	11 Months Ended	12 Months Ended
Sep. 03, 2014	Sep. 30, 2013	Sep. 30, 2012
Net change in unrealized appreciation of investments, taxes	$ 14,286,000	$ 13,544,000	$ 9,991,000
Reclassification adjustment of other-than-temporary impairment losses recognized in net income, taxes	$ 0	$ 668,000	$ 1,135,000

Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (e,f)

-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580

Name:	us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration