Significant Accounting Policies - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 25, 2015	Jan. 26, 2014
Available for sale investments
Accumulated other comprehensive income balance at beginning of period - Available for Sale Investments	$ 0	$ 0	$ 5
Other comprehensive income (loss) before reclassifications, net of tax - Available for Sale Investments	0	0	(5)
Amounts reclassified, net of tax - Available for Sale Investments	0	0	0
Net current period other comprehensive income (loss) - Available for Sale Investments	0	0	(5)
Accumulated other comprehensive income balance at end of period - Available for Sale Investments	0	0	0
Interest rate hedge
Accumulated other comprehensive income balance at beginning of period - Interest Rate Hedge	(538)	(448)	(353)
Other comprehensive income (loss) before reclassifications, net of tax - Interest Rate Hedge	(33)	(243)	(145)
Amounts reclassified, net of tax - Interest Rate Hedge	523	153	50
Net current period other comprehensive income (loss) - Interest Rate Hedge	490	(90)	(95)
Accumulated other comprehensive income balance at end of period - Interest Rate Hedge	(48)	(538)	(448)
Cumulative translation adjustments
Accumulated other comprehensive income balance at beginning of period - Cumulative Translation Adjustments	701	701	701
Other comprehensive income (loss) before reclassifications, net of tax - Translation Currency Adjustment	0	0	0
Amounts reclassified, net of tax - Currency Translation Adjustment	0	0	0
Net current period comprehensive income (loss) - Translation Currency Adjustment	0	0	0
Accumulated other comprehensive income balance at end of period - Cumulative Translation Adjustments	701	701	701
Total comprehensive income (loss)
Total accumulated other comprehensive income balance at beginning of period - Total	163	253	353
Other comprehensive income (loss), before reclassifications, net of tax - Total	(33)	(243)	(150)
Amounts reclassified, net of tax - Total	523	153	50
Net current period comprehensive income (loss) - Total	490	(90)	(100)
Total accumulated other comprehensive income balance at end of period - Total	$ 653	$ 163	$ 253