Other Compensation Plans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 24, 2015 plan		Apr. 25, 2014		Apr. 26, 2013
Defined Benefit Plan Disclosure [Line Items]
Employer Match Contribution	$ 1,418		$ 452		$ 3,885
Number of nonqualified deferred compensation plans	3
Deferred compensation obligation, shares	59
Other noncurrent compensation arrangements	958	[1]	1,323	[1]
Total deferred compensation liabilities	30,736		32,291
Less current portion	(8,255)		(1,950)
Noncurrent deferred compensation liabilities	22,481		30,341
Operating Wages and Fringe Benefit Expenses
Defined Benefit Plan Disclosure [Line Items]
Reduction to unused vacation liability	3,636
SERP
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Employer Contribution	526		580		542
Deferred cash obligations	9,198		9,704
BEEDP and BEDDP Plans
Defined Benefit Plan Disclosure [Line Items]
Expenses related to investments of employee deferrals	1,351		1,942		1,788
Deferred liability for share-based obligations in BEEDP and BEDDP plans	2,676		2,475
Deferred cash obligations	$ 17,904		$ 18,789

[1] The April 24, 2015, balance primarily related to the noncurrent portion of severance owed to our former Chief Executive Officer, see Note 8 for more details. The April 25, 2014, balance primarily related to the noncurrent portion of deferred payments to former employees of Kettle Creations, which was acquired by the Company in fiscal 2013.