Investments (Details) - USD ($) $ in Thousands	Nov. 03, 2018	Feb. 03, 2018	Oct. 28, 2017
Investments [Abstract]
Carrying value of investments	$ 72,827	$ 125,349	$ 180,531
Unrealized gains included in accumulated other comprehensive loss	3	23	47
Unrealized losses included in accumulated other comprehensive loss	(982)	(767)	(512)
Fair value	$ 71,848	$ 124,605	$ 180,066

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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