Profit Sharing, Employee Stock Ownership, Employee Stock Purchase and Pension Plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Defined Contribution Plan Disclosure [Line Items]
Deferred Compensation Plan, Subsequent Employees Hired Maximum Annual Profit Sharing Percentage Compared to Employees Hired Before Benchmark Date	50.00%
Subsequent employees hired maximm annual profit sharing percentage compared to employees hired before benchmark date (percent)	50.00%
Deferred Compensation, Maximum Annual Profit Sharing Per Employee, Percent	5.00%	5.00%	5.00%
Employee Stock Ownership Plan (ESOP), Compensation Expense, Maximum Percent of Eligible Compensation	5.00%	5.00%	5.00%
ESPP Shares Issued (shares)	31,383	28,214	30,434
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 1,266	$ 1,231	$ 1,204
Defined Contribution Plan, Employer Matching Contribution Amount	1,216	980	1,206
Employee Stock Ownership Plan (ESOP), Compensation Expense	1,266	1,231	1,203
Total contribution expense	4,451	4,199	3,902
Multiemployer Pension Plan Withdrawal Aggregate Cash Payment per Year	467
Maximum [Member] | Pension Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution (percent)	5.00%	5.00%	5.00%
Bargaining Unit Employee Plans [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	450	500	0
Bargaining Unit Employee Plans [Member] | Deferred Profit Sharing [Member]
Defined Contribution Plan Disclosure [Line Items]
Deferred Compensation, Maximum Annual Profit Sharing Per Employee, Percent	5.00%
Minimum annual profit sharing per employee (percent)	2.50%
Bargaining Unit Employee Plans [Member] | Employee Stock Ownership Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Employee Stock Ownership Plan (ESOP), Compensation Expense, Maximum Percent of Eligible Compensation	5.00%
Minimum annual profit sharing per employee (percent)	2.50%
Employee Stock Purchase Plans [Member]
Defined Contribution Plan Disclosure [Line Items]
Employee Stock Purchase Plans (ESPP), Compensation Expense	$ 253	$ 257	$ 289