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Summary of Cash, Cash Equivalents and Marketable Securities Available for Sale (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Sep. 30, 2013
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Cash and Cash Equivalents |  |
Cash, cash equivalents and marketable securities [Line Items] |  |
Amortized Cost | $ 105,075 | $ 83,178
Gross Unrealized Gains | 0 | 0
Fair Value | 105,075 | 83,178
Cash and Cash Equivalents | Cash |  |
Cash, cash equivalents and marketable securities [Line Items] |  |
Amortized Cost | 94,749 | 82,493
Gross Unrealized Gains | 0 | 0
Fair Value | 94,749 | 82,493
Cash and Cash Equivalents | Money market funds |  |
Cash, cash equivalents and marketable securities [Line Items] |  |
Amortized Cost | 439 | 439
Gross Unrealized Gains | 0 | 0
Fair Value | 439 | 439
Cash and Cash Equivalents | Non-U.S. money market funds |  |
Cash, cash equivalents and marketable securities [Line Items] |  |
Amortized Cost | 9,887 | 246
Gross Unrealized Gains | 0 | 0
Fair Value | 9,887 | 246
Long-term Marketable Securities | Marketable equity securities |  |
Cash, cash equivalents and marketable securities [Line Items] |  |
Amortized Cost | 7,220 | 6,006
Gross Unrealized Gains | 1,531 | 1,101
Fair Value | $ 8,751 | $ 7,107

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- Definition Amount of accumulated pre-tax unrealized gain before deducting pre-tax unrealized losses on investments in available-for-sale securities impacting investments. + References No definition available. + Details
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- 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
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- 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
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