CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Balances at Dec. 26, 2009	$ 577,781	$ 50	$ 630,333	$ 1,253	$ (53,855)
Balances (Shares) at Dec. 26, 2009		49,762,008
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to exercise of options for cash	698	0	698	0	0
Issuance of common stock pursuant to exercise of options for cash (Shares)		115,597
Issuance of common stock pursuant to acquisition of business	0
Issuance of common stock pursuant to vesting of restricted stock units, net of stock withheld	(762)	0	(762)	0	0
Issuance of common stock pursuant to vesting of restricted stock units, net of stock withheld (Shares)		414,441
Issuance of common stock under the Employee Stock Purchase Plan	3,788	2	3,786	0	0
Issuance of common stock under the Employee Stock Purchase Plan (Shares)		365,871
Purchase and retirement of common stock	(626)		(626)
Purchase and retirement of common stock (Shares)	(70,000)	(70,000)
Stock-based compensation	17,834	0	17,834	0	0
Stock Issued During Period (Shares)		0
Components of other comprehensive income (loss):
Change in unrealized gain (loss) on marketable securities, net of tax	(235)	0	0	(235)	0
Foreign currency translation adjustments	1,009	0	0	1,009	0
Net loss	(188,286)	0	0	0	(188,286)
Balances at Dec. 25, 2010	411,201	52	651,263	2,027	(242,141)
Balances (Shares) at Dec. 25, 2010		50,587,917
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to exercise of options for cash	914	0	914	0	0
Issuance of common stock pursuant to exercise of options for cash (Shares)		141,280
Issuance of common stock pursuant to acquisition of business	0
Issuance of common stock pursuant to vesting of restricted stock units, net of stock withheld	(219)	0	(219)	0	0
Issuance of common stock pursuant to vesting of restricted stock units, net of stock withheld (Shares)		485,204
Issuance of common stock under the Employee Stock Purchase Plan	2,813	0	2,813	0	0
Issuance of common stock under the Employee Stock Purchase Plan (Shares)		386,818
Purchase and retirement of common stock	(16,411)	(2)	(16,409)	0	0
Purchase and retirement of common stock (Shares)	(2,332,740)	(2,332,740)
Stock-based compensation	13,662	0	13,662	0	0
Stock Issued During Period (Shares)		0
Components of other comprehensive income (loss):
Change in unrealized gain (loss) on marketable securities, net of tax	13	0	0	13	0
Foreign currency translation adjustments	660	0	0	660	0
Net loss	(65,981)	0	0	0	(65,981)
Balances at Dec. 31, 2011	346,652	50	652,024	2,700	(308,122)
Balances (Shares) at Dec. 31, 2011	49,268,479	49,268,479
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to exercise of options for cash	0	0	0	0	0
Issuance of common stock pursuant to exercise of options for cash (Shares)		0
Issuance of common stock pursuant to acquisition of business	13,805	3	13,802	0	0
Issuance of common stock pursuant to acquisitions of businesses (Shares)		3,020,944
Issuance of common stock pursuant to vesting of restricted stock units, net of stock withheld	(106)	0	(106)	0	0
Issuance of common stock pursuant to vesting of restricted stock units, net of stock withheld (Shares)		464,203
Issuance of common stock under the Employee Stock Purchase Plan	2,358	1	2,357	0	0
Issuance of common stock under the Employee Stock Purchase Plan (Shares)		533,077
Stock-based compensation	13,080	0	13,080	0	0
Components of other comprehensive income (loss):
Change in unrealized gain (loss) on marketable securities, net of tax	(147)	0	0	(147)	0
Foreign currency translation adjustments	(838)	0	0	(838)	0
Net loss	(35,546)	0	0	0	(35,546)
Balances at Dec. 29, 2012	$ 339,258	$ 54	$ 681,157	$ 1,715	$ (343,668)
Balances (Shares) at Dec. 29, 2012	53,286,703	53,286,703