Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 26, 2019	Jan. 27, 2018
Deferred tax assets:
Insurance and other reserves	$ 22,885	$ 22,368
Allowance for doubtful accounts and reserves	5,323	1,081
Net operating loss carryforwards	5,515	822
Stock-based compensation	3,324	3,405
Other	3,764	1,174
Total deferred tax assets	40,811	28,850
Valuation allowance	(418)	(148)
Deferred tax assets, net of valuation allowance	40,393	28,702
Deferred tax liabilities:
Property and equipment	77,490	59,933
Goodwill and intangibles	27,780	25,852
Other	1,086	345
Deferred tax liabilities	106,356	86,130
Net deferred tax liabilities	$ 65,963	$ 57,428