The maximum term of the deferred compensation arrangement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64, 65

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph A240

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Aggregate unrecognized cost of share-based awards, other than options, made to employees under an equity-based compensation plan, that have yet to vest.

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Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-SubTopic 10

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-Paragraph 2

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Price of a single share of a number of saleable stocks of a company.

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-Topic 820

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Stock-Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified			6 Months Ended					2 Months Ended
	Feb. 28, 2013	Feb. 28, 2013 2006 Incentive Plan [Member]	Feb. 28, 2013 Non Qualified Stock Options and Restricted Stock [Member] 2006 Incentive Plan [Member]	Feb. 28, 2013 Non Qualified Stock Options and Restricted Stock [Member] 2006 Incentive Plan [Member] Minimum [Member]	Feb. 28, 2013 Non Qualified Stock Options and Restricted Stock [Member] 2006 Incentive Plan [Member] Maximum [Member]	Feb. 28, 2013 Stock Options [Member]	Feb. 28, 2013 Restricted Stock [Member]	Jan. 01, 2013 Restricted Stock [Member] Non Employee Directors [Member]	Jan. 01, 2013 Restricted Stock [Member] 2006 Incentive Plan [Member] Non Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares available for issuance under the plan (in shares)		311,116
Vesting period (in years)				1 year	4 years				1 year
Expiration period (in years)			7 years
Share price of Company's stock (in USD per share)	$ 10.15
Compensation expense related to non-vested awards not yet recognized						$ 1.2
Weighted-average period over which unrecognized compensation cost will be recognized (in years)						1 year 3 months 18 days	9 months 18 days
Restricted stock awards granted (in shares)							24,489	2,721
Compensation expense related to unvested awards not yet recognized							$ 0.2