Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Current assets:
Cash and cash equivalents	$ 112,570	$ 100,038
Short-term investments	45,885	10,894
Accounts receivable, net of allowance for doubtful accounts of $795 (2013 - $1,036)	55,414	56,112
Inventories, net	37,949	31,074
Prepaid expenses and other current assets	16,473	19,855
Income taxes receivable	1,968	2,640
Prepaid tax expense	51	5,695
Deferred tax assets	5,442	43,131
Total current assets	275,752	269,439
Investment securities	107,509	103,391
Investments and other assets	7,683	10,750
Prepaid tax expenses	42	93
Property and equipment, net	37,311	39,149
Goodwill	283,239	278,849
Intangible assets, net	143,680	146,974
Deferred tax assets	13,412	1,306
Long-term income tax receivable	457
Total assets	869,085	849,951
Current liabilities:
Accounts payable	23,360	23,173
Accrued liabilities	74,135	64,257
Credit facility		30,000
Income taxes payable	1,062	632
Liability for unrecognized tax benefit	16,076	54,127
Deferred tax liabilities	7,644	71
Deferred income	4,530	7,481
Total current liabilities	126,807	179,741
Long-term obligations	36,305	11,108
Deferred tax liabilities	53,493	43,143
Liability for unrecognized tax benefit	25,244	27,947
PMC special shares convertible into 278 (2013 - 1,019) shares of common stock	745	1,188
Contingencies (Note 11. Commitments and Contingencies)
Stockholders' equity:
Common stock, par value $.001: 900,000 shares authorized; 199,518 shares issued and outstanding (2013 - 194,415)	200	201
Additional paid in capital	1,595,609	1,550,184
Accumulated other comprehensive loss	(2,355)	(526)
Accumulated deficit	(966,963)	(963,035)
Total stockholders' equity	626,491	586,824
Total liabilities and stockholders' equity	$ 869,085	$ 849,951