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Business and Basis of Presentation (Pension Expense) (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 26, 2017	Mar. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, minimum annual contributions per participating employee, percent		1.00%
Defined contribution plan, maximum annual contributions per employee, percent		60.00%
Defined contribution plan, employer matching contribution, percent of match		65.00%
Defined contribution plan, employer matching contribution, percent of employees pay		6.00%
Defined contribution plan, employers matching contribution, vesting period		3 years
Defined contribution plan, cost recognized		$ 100
Pension plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contribution		$ 6,078
Discount rate	4.32%	4.21%
Fleet Employees Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, minimum annual contributions per participating employee, percent		2.00%
Defined contribution plan, maximum annual contributions per employee, percent		50.00%
Defined contribution plan, employer matching contribution, percent of match		100.00%
Defined contribution plan, employer matching contribution, percent of employees pay		6.00%
Defined contribution plan, cost recognized		$ 200

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- Definition

Defined Contribution Plan, Employers Matching Contribution, Vesting Period

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- Definition

Defined Contribution Plan, Minimum Annual Contributions Per Participating Employee, Percent

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- Definition

Fair value of assets transferred into (out of) a defined benefit pension plan.

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- Definition

The interest rate used to adjust for the time value of money.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(1)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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Percentage employer matches of the employee's percentage contribution matched.

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Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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