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Pension Plan - Additional Information (Detail) (USD $) | 1 Months Ended | 6 Months Ended |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 31, 2012 | Aug. 31, 2014 | Feb. 28, 2015 Scenario, Forecast [Member] | Jul. 31, 2012 Predecessor [Member] | Feb. 28, 2015 Minimum [Member] Scenario, Forecast [Member] | Feb. 28, 2015 Maximum [Member] Scenario, Forecast [Member]
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Employees covered under noncontributory Pension Plan |  | 8.00% |  |  |  |
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 |  | $ 3,000,000 |  |  | $ 2,000,000 | $ 3,000,000
Number of years used for calculating Pension Plan liability | 25 years |  |  | 24 months |  |

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- Definition Compensation period preceding retirement and termination. + References No definition available. + Details
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- Definition Employees covered under non contributory pension plan. + References No definition available. + Details
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- 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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