Income Taxes (Significant Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Mar. 26, 2016	Mar. 28, 2015
Deferred tax assets:
Inventory valuation		$ 6,377
Accrued expenses and allowances	$ 3,761	4,705
Net operating loss carryforwards	24,592	57,878
Research and development tax credit carryforwards	9,649	14,567
State tax credit carryforwards	142	225
Capitalized research and development	1,160	1,793
Other	24,745	30,695
Total deferred tax assets	64,049	116,240
Valuation allowance for deferred tax assets	(10,773)	(33,190)
Net deferred tax assets	53,276	83,050
Deferred tax liabilities:
Depreciation and amortization	10,924	6,827
Acquisition intangibles	24,527	35,242
Total deferred tax liabilities	35,451	42,069
Total net deferred tax assets	$ 17,825	$ 40,981