Quarterly report pursuant to Section 13 or 15(d)

Investments - Additional Information (Detail)

v3.7.0.1
Investments - Additional Information (Detail) - USD ($)
$ in Thousands
Jul. 29, 2017
Jan. 28, 2017
Jul. 30, 2016
Investments Schedule [Abstract]      
Certificates of deposit $ 180,000 $ 30,000 $ 110,000