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Fair Value (Tables)

9 Months Ended

Oct. 31, 2019

Fair Value Disclosures [Abstract]

Financial Assets Measured at Fair Value on Recurring Basis

The Company’s financial assets that are accounted for at fair value on a recurring basis are presented in the tables below:

		Marketable Securities Fair Value as of
		October 31, 2019
		Level 1				Level 2				Level 3				Total
Assets:
Corporate bonds		$	171,138			$	—			$	—			$	171,138
Municipal and pre-refunded municipal bonds			—				60,053				—				60,053
Federal government agencies			7,976				—				—				7,976
Mutual funds, held in rabbi trust			7,804				—				—				7,804
Certificates of deposit			—				4,860				—				4,860
Commercial paper			—				1,987				—				1,987
		$	186,918			$	66,900			$	—			$	253,818

		Marketable Securities Fair Value as of
		January 31, 2019
		Level 1				Level 2				Level 3				Total
Assets:
Corporate bonds		$	261,333			$	—			$	—			$	261,333
Municipal and pre-refunded municipal bonds			—				51,232				—				51,232
Federal government agencies			8,062				—				—				8,062
Mutual funds, held in rabbi trust			6,751				—				—				6,751
Certificates of deposit			—				3,193				—				3,193
Commercial paper			—				2,979				—				2,979
Treasury bills			2,974				—				—				2,974
		$	279,120			$	57,404			$	—			$	336,524

		Marketable Securities Fair Value as of
		October 31, 2018
		Level 1				Level 2				Level 3				Total
Assets:
Corporate bonds		$	225,062			$	—			$	—			$	225,062
Municipal and pre-refunded municipal bonds			—				35,798				—				35,798
Mutual funds, held in rabbi trust			6,459				—				—				6,459
Certificates of deposit			—				3,145				—				3,145
Commercial paper			—				2,960				—				2,960
		$	231,521			$	41,903			$	—			$	273,424

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- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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