v3.8.0.1
Investments - Contractual Maturities of Available for Sale Securities (Details) - USD ($)
$ in Thousands
Feb. 03, 2018
Jan. 28, 2017
Amortized Cost    
Due in one year or less $ 554,247 $ 423,151
Due between one and five years 400,866 423,669
Due over five years 0 12,864
Amortized Cost 955,113 859,684
Estimated Fair Value    
Due in one year or less 553,866 423,058
Due between one and five years 398,924 422,995
Due over five years 0 12,830
Estimated Fair Value $ 952,790 $ 858,883