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Financial Instruments and Fair Value Measurement (Tables) | 6 Months Ended
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Mar. 31, 2018
Financial Instruments and Fair Value Measurement |
Summary of available-for-sale securities |
|  |  |  |  | Gross |  | Gross |  | Estimated |
|  |  |  |  | Unrealized |  | Unrealized |  | Fair |
|  | Cost |  | Gains |  | Losses |  | Value |
|  | (in thousands) |
Equity Securities: |  |  |  |  |  |  |  |  |  |  |  |  |
March 31, 2018 |  | $ | 38,473 |  | $ | 26,572 |  | $ | (6,664) |  | $ | 58,381 |
September 30, 2017 |  | $ | 38,473 |  | $ | 31,700 |  | $ | — |  | $ | 70,173 |
Summary of assets and liabilities measured at fair value | The following table summarizes our assets and liabilities measured at fair value presented in our Consolidated Condensed Balance Sheet as of March 31, 2018:
|  | Fair Value |  | (Level 1) |  | (Level 2) |  | (Level 3) |
|  | (in thousands) |
Recurring fair value measurements: |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  | $ | 3,498 |  | $ | — |  | $ | 3,498 |  | $ | — |
Corporate and municipal debt securities |  |  | 15,858 |  |  | — |  |  | 15,858 |  |  | — |
U.S. government and federal agency securities |  |  | 25,914 |  |  | 25,914 |  |  | — |  |  | — |
Total short-term investments |  |  | 45,270 |  |  | 25,914 |  |  | 19,356 |  |  | — |
Cash and cash equivalents |  |  | 334,764 |  |  | 334,764 |  |  | — |  |  | — |
Investments |  |  | 58,381 |  |  | 58,381 |  |  | — |  |  | — |
Other current assets |  |  | 38,385 |  |  | 38,385 |  |  | — |  |  | — |
Other assets |  |  | 6,905 |  |  | 6,905 |  |  | — |  |  | — |
Total assets measured at fair value |  | $ | 483,705 |  | $ | 464,349 |  | $ | 19,356 |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent earnout liability |  | $ | 15,702 |  | $ | — |  | $ | — |  | $ | 15,702 |
Summary of supplemental fair value information about long-term fixed-rate debt |
|  | March 31, |  | September 30, |
|  | 2018 |  | 2017 |
|  | (in millions) |
Carrying value of long-term fixed-rate debt |  | $ | 493.4 |  | $ | 492.9 |
Fair value of long-term fixed-rate debt |  | $ | 521.8 |  | $ | 529.0 |

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- Definition Tabular disclosure of the fair value measurement of assets and liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs). + References No definition available. + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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