Stock Repurchase Program - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended			94 Months Ended
	Jan. 31, 2016	Jan. 25, 2015	Jan. 26, 2014	Jan. 31, 2016
Equity [Abstract]
Repurchased shares of common stock, cost	$ 57,311	$ 40,906	$ 30,000	$ 135,700
Remaining authorization under stock repurchase program	$ 62,700			$ 62,700