Income Taxes - Reconciliation of the Provision for Taxes (Details) - USD ($) $ in Thousands		12 Months Ended
		Jan. 28, 2018	Jan. 29, 2017	Jan. 31, 2016
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal income tax at statutory rate		$ 20,222	$ 25,571	$ 7,133
State income taxes, net of federal benefit		(159)	0	(7)
Foreign taxes at rates less than federal rates		(8,698)	(12,074)	(62)
Tax credits generated		(3,278)	(2,864)	(3,598)
Changes in valuation allowance		(41,911)	5,578	1,847
Non-taxable gain on sale		0	(2,978)	0
Changes in uncertain tax positions		1,538	1,047	1,009
Deemed dividends		299	266	276
Equity compensation		(8,333)	2,553	2,529
Permanent differences		264	448	28
Deferred tax provision - indefinite-lived intangibles		0	0	5,670
Triune earn-out		0	0	(5,670)
Revaluation of deferred tax assets and liabilities		0	0	334
Impact of US Tax Reform	[1]	65,442	0	0
Other		(2,195)	852	(607)
Provision for taxes		23,191	$ 18,399	$ 8,882
Impact of US Tax Reform [Abstract]
Benefit from remeasurement of deferreds due to rate change impact		2,600
Expense due to change in permanent reinvestment assertion, net of foreign tax credits generated		400
Expense due to the estimated impact of the transition tax, net of foreign tax credits generated		66,500
Estimated current income tax payable resulting from the transition tax		$ 1,100

[1] Impact of US tax reform includes $2.6 million of benefit from remeasurement of deferreds, $0.4 million of expense due to change in permanent reinvestment assertion net of foreign tax credits generated, and $66.5 million of expense due to the estimated impact of the transition tax, net of foreign tax credits generated. The transition tax, net of previously fully valued deferreds results in a total estimated current income tax payable of $1.1 million.