Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 28, 2015	Dec. 27, 2014
Current assets:
Cash and cash equivalents	$ 64,548	$ 112,570
Short-term investments	45,580	45,885
Accounts receivable, net of allowance for doubtful accounts of $795 (2014 - $795)	62,156	55,414
Inventories, net	35,685	37,949
Prepaid expenses and other current assets	14,348	16,473
Income taxes receivable	1,966	1,968
Prepaid income tax expenses		51
Deferred income tax assets	5,255	5,442
Total current assets	229,538	275,752
Investment securities	120,052	107,509
Investments and other assets	7,332	7,683
Prepaid income tax expenses	93	42
Property and equipment, net	37,370	37,311
Goodwill	283,239	283,239
Intangible assets, net	133,344	143,680
Deferred income tax assets	13,123	13,412
Income taxes receivable	465	457
Assets, Total	824,556	869,085
Current liabilities:
Accounts payable	20,357	23,360
Accrued liabilities	53,788	74,135
Credit facility	10,000
Income taxes payable	1,109	1,062
Liability for unrecognized tax benefit	14,820	16,076
Deferred income tax liabilities	7,644	7,644
Deferred income	3,944	4,530
Total current liabilities	111,662	126,807
Long-term obligations	25,008	36,305
Deferred income tax liabilities	54,209	53,493
Liability for unrecognized tax benefit	25,768	25,244
PMC special shares convertible into 205 (2014 - 278) shares of common stock	480	745
Stockholders' equity:
Common stock, par value $.001: 900,000 shares authorized; 197,726 shares issued and outstanding (2014 - 199,518)	198	200
Additional paid in capital	1,603,388	1,595,609
Accumulated other comprehensive loss	(2,185)	(2,355)
Accumulated deficit	(993,972)	(966,963)
Total stockholders' equity	607,429	626,491
Liabilities and Stockholders' Equity, Total	$ 824,556	$ 869,085