Employee Benefit Plans (Details) - USD ($) $ in Millions |
12 Months Ended | 22 Months Ended | ||
|---|---|---|---|---|
May 31, 2016 |
May 31, 2015 |
May 31, 2014 |
Nov. 30, 2013 |
|
| 401 (K) Plan [Member] | ||||
| Defined Contribution Plan Disclosure [Line Items] | ||||
| Maximum percentage of salary deferral | 50.00% | |||
| Years of service to be eligible for matching contribution | 1 year | |||
| Minimum number of hours worked for eligibility | 41 days 16 hours | |||
| Percentage of employer matching contributions of eligible employee pay | 50.00% | 50.00% | ||
| Percentage of employee pay eligible for employer matching contributions | 8.00% | 6.00% | ||
| Company contributions to the plan | $ 21.4 | $ 19.6 | $ 16.4 | |
| Percentage participant directed | 100.00% | |||
| Deferred Compensation Plans [Member] | ||||
| Defined Contribution Plan Disclosure [Line Items] | ||||
| Percentage of annual base salary and bonus that eligible employees may defer | 50.00% | |||
| Percentage of Board cash compensation that eligible outside directors may defer | 100.00% | |||
| Amounts accrued under deferred compensation plans | $ 14.9 | $ 14.2 | ||
| X | ||||||||||
- Definition Defined Contribution Plan, Employer Matching Contribution, Minimum Number Of Hours Worked For Eligibility No definition available.
|
| X | ||||||||||
- Definition Defined Contribution Plan, Percentage Participant Directed No definition available.
|
| X | ||||||||||
- Definition Employees deferred compensation plans deferred percentage maximum. No definition available.
|
| X | ||||||||||
- Definition Outside directors deferred compensation plans deferred percentage maximum. No definition available.
|
| X | ||||||||||
- Definition Years of service to be eligible for Company match contribution No definition available.
|
| X | ||||||||||
- Definition The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of the cost recognized during the period for defined contribution plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition 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. No definition available.
|
| X | ||||||||||
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. No definition available.
|
| X | ||||||||||
- Definition Percentage employer matches of the employee's percentage contribution matched. No definition available.
|
| X | ||||||||||
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|