Profit Sharing, Employee Stock Ownership, Employee Stock Purchase and Pension Plans (Details) (USD $)	12 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Apr. 01, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Maximum annual profit sharing per employee (percent)			15.00%
Subsequent employees hired maximm annual profit sharing percentage compared to employees hired before benchmark date (percent)	50.00%
ESOP compensation expense, maximum percent of eligible compensation (percent)	5.00%	5.00%	5.00%
Profit sharing contribution expense	$ 1,231,000	$ 1,204,000	$ 2,616,000
ESOP contribution expense	1,231,000	1,203,000	802,000
Plan contribution expense	980,000	1,206,000	0
Total contribution expense	4,199,000	3,902,000	3,855,000
Maximum [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer matching contribution (percent)	5.00%	5.00%
Vertex [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan contribution expense	0	0	175,000
Vertex [Member] | Maximum [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer matching contribution (percent)			3.00%
Contributions by employer			200,000
Deferred Profit Sharing [Member] | Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contribution percentage of contribution for employees hired before April 1, 2012 (percent)	50.00%
Maximum annual profit sharing per employee (percent)	5.00%
Employee Stock Ownership Plan [Member] | Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Minimum annual profit sharing per employee (percent)	2.50%
ESOP compensation expense, maximum percent of eligible compensation (percent)	5.00%
Bargaining Unit Employee Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Contribution Plan, Cost Recognized	500,000	0	0
Bargaining Unit Employee Plans [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Maximum annual contribution per employee (percent)	5.00%
Bargaining Unit Employee Plans [Member] | Deferred Profit Sharing [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Minimum annual profit sharing per employee (percent)	2.50%
Employee Stock Purchase Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
ESPP compensation expense	$ 257,000	$ 289,000	$ 262,000