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Pension Plan - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Aug. 31, 2013 | Feb. 28, 2013 | Jul. 31, 2012
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Employees covered under Non Contributory Pension Plan | 9.00% |  |
Compensation period preceding retirement and termination | 5 years |  |
Minimum required contribution to the plan is approximately | $ 0 |  |
Company expect to make cash contribution to the plan |  | 3.0 |
Number of years used for calculating pension plan liability |  |  | 25 years
Predecessor [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Number of years used for calculating pension plan liability |  |  | 24 months
Minimum [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Company expect to make cash contribution to the plan | 2.0 |  |
Maximum [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Company expect to make cash contribution to the plan | $ 3.0 |  |

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- Definition Compensation period preceding retirement and termination. + References No definition available. + Details
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- Details
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- Definition Employees covered under non contributory pension plan. + References No definition available. + Details
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- Definition Number of years used to average discount rate. + References No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Definition Amount of minimum contribution(s) required for future periods to a multiemployer plan by collective bargaining arrangements, statutory obligations, or other contractual obligations. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (f)(3) -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450657-114947 + Details
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