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Available-For-Sale Securities

12 Months Ended

Sep. 30, 2017

Investments, Debt and Equity Securities [Abstract]

Available-For-Sale Securities

Note 5 — Available-For-Sale Securities

Available-for-sale securities consist of the following interest-bearing investments:

		As of September 30, 2017
		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
Corporate bonds		$	98,367			$	176			$	158			$	98,385
U.S. government treasuries			84,558				—				195				84,363
U.S. agency securities			60,794				—				148				60,646
Money market funds			52,504				—				—				52,504
Asset backed obligations			47,108				—				34				47,074
Commercial paper and certificates of deposit			33,448				—				—				33,448
Supranational and sovereign debt			8,819				—				42				8,777
Total(1)		$	385,598			$	176			$	577			$	385,197

(1) Available-for-sale securities with maturities longer than 90 days from the date of acquisition were classified as short-term interest-bearing investments and available-for-sale securities with maturities of 90 days or less from the date of acquisition were included in cash and cash equivalents on the Company’s balance sheet. As of September 30, 2017, $329,997 of securities were classified as short-term interest-bearing investments and $55,200 of securities were classified as cash and cash equivalents.

		As of September 30, 2016
		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
Corporate bonds		$	95,852			$	339			$	37			$	96,154
U.S. government treasuries			105,377				151				15				105,513
U.S. agency securities			48,339				69				15				48,393
Money market funds			449,288				—				—				449,288
Asset backed obligations			30,121				73				—				30,194
Commercial paper and certificates of deposit			42,498				—				—				42,498
Supranational and sovereign debt			8,334				8				—				8,342
Total(2)		$	779,809			$	640			$	67			$	780,382

(2) Available-for-sale securities with maturities longer than 90 days from the date of acquisition were classified as short-term interest-bearing investments and available-for-sale securities with maturities of 90 days or less from the date of acquisition were included in cash and cash equivalents on the Company’s balance sheet. As of September 30, 2016, $327,063 of securities were classified as short-term interest-bearing investments and $453,319 of securities were classified as cash and cash equivalents.

As of September 30, 2017, the unrealized losses attributable to the Company’s available-for-sale securities were primarily due to credit spreads and interest rate movements. The Company assessed whether such unrealized losses for the investments in its portfolio were other-than-temporary. Based on this assessment, the Company did not recognize any credit losses in fiscal years 2017, 2016 and 2015.

As of September 30, 2017, the Company’s available-for-sale securities had the following maturity dates:

		Market Value
Due within one year		$	170,161
1 to 2 years			120,819
2 to 3 years			77,666
3 to 4 years			10,642
Thereafter			5,909
		$	385,197

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- References

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- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-Glossary Debt Security
-URI http://asc.fasb.org/extlink&oid=6509901

Reference 2: 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=73527792&loc=d3e27290-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

Reference 4: 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=73527792&loc=d3e27232-111563

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-Glossary Equity Security
-URI http://asc.fasb.org/extlink&oid=6511694

Reference 6: 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 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563

Reference 9: 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=73527792&loc=d3e27405-111563

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