STOCK-BASED COMPENSATION (Details)	1 Months Ended	9 Months Ended
Jan. 28, 2007	Jul. 31, 2011
Stock options
Stock-based compensation
Vesting period low end of range		six months
Vesting period high end of the range		four years
Stock option expiration period		ten years
Frequency of universal stock option grant	one-time
Number of options granted (pre-split) during one-time stock option grant to full time employees of the company on January 8, 2007	100
The terms under which the universal stock option grant will vest	This grant was to vest upon the earlier of five years or attainment of a closing stock price of $50.00 per share (pre-split) for five consecutive trading days, and had an expiration of ten years after the grant date.
Nonvested shares
Stock-based compensation
Vesting period for nonvested shares issued after September 26, 2010		one year
Vesting period for nonvested shares issued on or before September 26, 2010		five years

The frequency of stock option grants to each active, full-time employee of the entity on record at a specific date.

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- Definition

The vesting term over 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 for nonvested shares issued on or before September 26, 2010.

+ Details

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- Definition

Represents the conditions under which stock options granted to each active, full-time employee of the company on record at a specirfic date will vest.

+ Details

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- Definition

The number of stock options (pre-split) granted to each active, full-time employee of the Company on record at a specific date.

+ Details

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- Definition

The date when the equity-based award expires as specified in the award agreement, which may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

Description of the period of time over 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, which may be expressed in a variety of ways (for example, in years, month and year).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph a
-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 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

The maximum vesting term over 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.

+ Details

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- Definition

The minimum vesting term over 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.

+ Details

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- 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.

+ Details

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