Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 25, 2015	Jan. 26, 2014
Current tax provision
Federal	$ 0	$ 749	$ 3,769
State	0	0	554
Foreign	8,709	7,810	14,962
Subtotal	8,709	8,559	19,285
Deferred tax provision (benefit)
Federal	6,679	508	23,938
State	(96)	(100)	(1,293)
Foreign	(6,410)	(419)	(5,945)
Subtotal	173	(11)	16,700
Provision for taxes	$ 8,882	$ 8,548	$ 35,985