XML 23 R22.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 2 - Summary of Significant Accounting Policies (Details) - Investment in Financial Instruments (USD $) | 12 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Note 2 - Summary of Significant Accounting Policies (Details) - Investment in Financial Instruments [Line Items] |  |
Aggregate Fair Value | $ 136,994,000 | $ 102,956,000
Amortized/Adjusted Cost Basis | 47,976,000 | 50,492,000
Pretax Unrealized Gains | 89,018,000 | 52,464,000
U.S. Treasury Notes and Bills [Member] |  |
Note 2 - Summary of Significant Accounting Policies (Details) - Investment in Financial Instruments [Line Items] |  |
Aggregate Fair Value |  | 800,000
Amortized/Adjusted Cost Basis |  | 800,000
Common Stock [Member] |  |
Note 2 - Summary of Significant Accounting Policies (Details) - Investment in Financial Instruments [Line Items] |  |
Aggregate Fair Value | 129,699,000 | 94,061,000
Amortized/Adjusted Cost Basis | 43,042,000 | 44,761,000
Pretax Unrealized Gains | 86,657,000 | 49,300,000
Fixed Income Securities [Member] |  |
Note 2 - Summary of Significant Accounting Policies (Details) - Investment in Financial Instruments [Line Items] |  |
Aggregate Fair Value | 7,295,000 | 8,095,000
Amortized/Adjusted Cost Basis | 4,934,000 | 4,931,000
Pretax Unrealized Gains | $ 2,361,000 | $ 3,164,000

X
- Details
Name: | djco_Note2SummaryofSignificantAccountingPoliciesDetailsInvestmentinFinancialInstrumentsLineItems
Namespace Prefix: | djco_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unrealized gain (loss) on investments in debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
Name: | us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration