Significant Accounting Policies - Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 25, 2015	Jan. 26, 2014	Jan. 27, 2013
Available for sale investments
Accumulated other comprehensive income balance at beginning of period - Available for Sale Investments	$ 0	$ 5	$ 37
Other comprehensive income (loss) before reclassifications, net of tax - Available for Sale Investments	0	(5)	(31)
Amounts reclassified, net of tax - Available for Sale Investments	0	0	(1)
Net current period other comprehensive income (loss) - Available for Sale Investments	0	(5)	(32)
Accumulated other comprehensive income balance at end of period - Available for Sale Investments		0	5
Interest rate hedge
Accumulated other comprehensive income balance at beginning of period - Interest Rate Hedge	(448)	(353)	0
Other comprehensive income (loss) before reclassifications, net of tax - Interest Rate Hedge	(243)	(145)	(353)
Amounts reclassified, net of tax - Interest Rate Hedge	153	50	0
Net current period other comprehensive income (loss) - Interest Rate Hedge	(90)	(95)	(353)
Accumulated other comprehensive income balance at end of period - Interest Rate Hedge	(538)	(448)	(353)
Cumulative translation adjustments
Accumulated other comprehensive income balance at beginning of period - Cumulative Translation Adjustments	701	701	498
Other comprehensive income (loss) before reclassifications, net of tax - Translation Currency Adjustment	0	0	203
Amounts reclassified, net of tax - Currency Translation Adjustment	0	0	0
Net current period comprehensive income (loss) - Translation Currency Adjustment	0	0	203
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	253	353	535
Other comprehensive income (loss), before reclassifications, net of tax - Total	(243)	(150)	(181)
Amounts reclassified, net of tax - Total	153	50	(1)
Net current period comprehensive income (loss) - Total	(90)	(100)	(182)
Total accumulated other comprehensive income balance at end of period - Total	$ 163	$ 253	$ 353