Income Taxes - Reconciliation of the Provision for Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 29, 2017	Jan. 31, 2016	Jan. 25, 2015
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal income tax at statutory rate	$ 25,571	$ 7,133	$ 12,775
State income taxes, net of federal benefit	0	(7)	(100)
Foreign taxes at rates less than federal rates	(12,074)	(62)	(11,960)
Tax credits generated	(2,864)	(3,598)	(5,302)
Changes in valuation allowance	5,578	1,847	14,284
Goodwill impairment	(2,978)	0	0
Changes in uncertain tax positions	1,047	1,009	(5,167)
Deemed dividends	266	276	2,513
Equity compensation	2,553	2,529	2,200
Permanent differences	448	28
Permanent differences			(93)
Deferred tax provision - indefinite-lived intangibles	0	(5,670)	0
Triune earn-out	0	5,670	0
Revaluation of deferred tax assets and liabilities	0	334	(432)
Other	852	(607)	(170)
Provision for taxes	$ 18,399	$ 8,882	$ 8,548