Commitments and Contingencies (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
May. 31, 2015 |
Feb. 28, 2015 |
Nov. 30, 2014 |
Aug. 31, 2014 |
May. 31, 2015 |
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| Line of Credit [Member] | JP Morgan Chase Bank, N.A. [Member] | |||||
| Lines of credit | |||||
| Amount available | $ 350.0 | $ 350.0 | |||
| Expiration date | Feb. 28, 2016 | ||||
| Line of Credit [Member] | Bank of America, N.A. [Member] | |||||
| Lines of credit | |||||
| Amount available | 250.0 | $ 250.0 | |||
| Expiration date | Feb. 28, 2016 | ||||
| Line of Credit [Member] | PNC Bank, National Association [Member] | |||||
| Lines of credit | |||||
| Amount available | 150.0 | $ 150.0 | |||
| Expiration date | Feb. 28, 2016 | ||||
| Line of Credit [Member] | Wells Fargo Bank, National Association [Member] | |||||
| Lines of credit | |||||
| Amount available | 150.0 | $ 150.0 | |||
| Expiration date | Feb. 28, 2016 | ||||
| Revolving Credit Facility [Member] | |||||
| Lines of credit | |||||
| Expiration date | Jun. 21, 2018 | ||||
| Maximum Amount Outstanding During Period | $ 0.0 | $ 0.0 | $ 150.0 | $ 100.0 | |
| Interest Rate on amount borrowed | 0.00% | 0.00% | 3.25% | 3.25% | |
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- References No definition available.
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The effective interest rate during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Maximum amount borrowed under the credit facility at any time during the period. No definition available.
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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