Accrued Liabilities (Summary of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 25, 2015	Jan. 26, 2014
Payables and Accruals [Abstract]
Compensation	$ 15,895	$ 20,642
Equity awards accounted for as a liability	594	718
Deferred compensation	1,448	527
Accrued sales and marketing expenses	4,130	5,028
Accrued professional fees	2,149	4,019
Accrued interest expense	9	93
Income taxes payable	8,765	6,153
Accrued taxes	394	32
Accrued restructuring	342	282	$ 2,632
Other	7,478	12,260
Total accrued liabilities, current	$ 41,204	$ 49,754