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Investments (Tables) | 3 Months Ended
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Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract] |
Amortized Cost and Fair Value of Held to Maturity Investments | Amortized cost and fair value for investments classified as held-to-maturity at December 31, 2014 were as follows:
|  |  |  |  |  |  |  | Estimated
|  | Amortized |  | Gross Unrealized |  | Fair Market
|  | Cost |  | Gains |  | Losses |  | Value
Due in less than 1 year: |  |  |  |  |  |  |  |
Municipal bonds |  | $ | 25,291 |  |  | $ | 15 |  |  | $ | — |  |  | $ | 25,306 |
Corporate bonds |  | 19,488 |  |  | — |  |  | (24 | ) |  | 19,464 |
Certificates of deposit |  | 4,129 |  |  | — |  |  | — |  |  | 4,129 |
Due in 1 - 2 years: |  |  |  |  |  |  |  |
Municipal bonds |  | 5,389 |  |  | 10 |  |  | — |  |  | 5,399 |
Corporate bonds |  | 2,818 |  |  | — |  |  | (6 | ) |  | $ | 2,812 |
Certificates of deposit |  | 1,087 |  |  | — |  |  | — |  |  | 1,087 |
|  | $ | 58,202 |  |  | $ | 25 |  |  | $ | (30 | ) |  | $ | 58,197 |
Amortized cost and fair value for investments classified as held-to-maturity at September 30, 2014 were as follows:
|  |  |  |  |  |  |  | Estimated
|  | Amortized |  | Gross Unrealized |  | Fair Market
|  | Cost |  | Gains |  | Losses |  | Value
Due in less than 1 year: |  |  |  |  |  |  |  |
Municipal bonds |  | $ | 26,894 |  |  | $ | 20 |  |  | $ | — |  |  | $ | 26,914 |
Corporate bonds |  | 16,836 |  |  | 1 |  |  | (24 | ) |  | 16,813 |
Certificates of deposit |  | 2,176 |  |  | — |  |  | — |  |  | 2,176 |
Due in 1 - 2 years: |  |  |  |  |  |  |  |
Municipal bonds |  | 4,230 |  |  | 7 |  |  | — |  |  | 4,237 |
Corporate bonds |  | 4,054 |  |  | — |  |  | (13 | ) |  | $ | 4,041 |
Certificates of deposit |  | 2,973 |  |  | — |  |  | — |  |  | 2,973 |
|  | $ | 57,163 |  |  | $ | 28 |  |  | $ | (37 | ) |  | $ | 57,154 |

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- Definition Tabular disclosure of all investments in certain debt and equity securities for which the entity has the positive intent and ability to hold until maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5086-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6435544&loc=d3e41834-113960 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563 + Details
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