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Goodwill and Intangible Assets - Narratives (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 26, 2019
Oct. 27, 2018
Oct. 26, 2019
Oct. 27, 2018
Jan. 26, 2019
Goodwill and Intangible Assets Disclosure [Abstract]          
Goodwill $ 325,749   $ 325,749   $ 325,749
Amortization of intangible assets $ 5,300 $ 5,800 $ 15,900 $ 17,200