STOCK-BASED COMPENSATION (Summary Related to Options Outstanding and Exercisable) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Jul. 31, 2012 Y
Share-based Compensation, Options Outstanding and Exercisable, by Exercise Price Range
Number of Shares	147
Weighted Average Remaining Contractual Life (years)	2.16
Weighted Average Exercise Price	$ 11.89
Range of Exercise Prices, Lower Limit	$ 9.00
Range of Exercise Prices, Upper Limit	$ 17.00
$9.00 - $10.50
Share-based Compensation, Options Outstanding and Exercisable, by Exercise Price Range
Number of Shares	77
Weighted Average Remaining Contractual Life (years)	1.07
Weighted Average Exercise Price	$ 9.34
Range of Exercise Prices, Lower Limit	$ 9.00
Range of Exercise Prices, Upper Limit	$ 10.50
$10.51 - $12.00
Share-based Compensation, Options Outstanding and Exercisable, by Exercise Price Range
Number of Shares	0
Weighted Average Remaining Contractual Life (years)	0.00
Weighted Average Exercise Price	$ 0.00
Range of Exercise Prices, Lower Limit	$ 10.51
Range of Exercise Prices, Upper Limit	$ 12.00
$12.01 - $13.50
Share-based Compensation, Options Outstanding and Exercisable, by Exercise Price Range
Number of Shares	23
Weighted Average Remaining Contractual Life (years)	2.19
Weighted Average Exercise Price	$ 13.09
Range of Exercise Prices, Lower Limit	$ 12.01
Range of Exercise Prices, Upper Limit	$ 13.50
$13.51 - $15.00
Share-based Compensation, Options Outstanding and Exercisable, by Exercise Price Range
Number of Shares	25
Weighted Average Remaining Contractual Life (years)	3.86
Weighted Average Exercise Price	$ 14.82
Range of Exercise Prices, Lower Limit	$ 13.51
Range of Exercise Prices, Upper Limit	$ 15.00
$15.01 - $16.50
Share-based Compensation, Options Outstanding and Exercisable, by Exercise Price Range
Number of Shares	12
Weighted Average Remaining Contractual Life (years)	3.62
Weighted Average Exercise Price	$ 15.37
Range of Exercise Prices, Lower Limit	$ 15.01
Range of Exercise Prices, Upper Limit	$ 16.50
$16.51 - $17.00
Share-based Compensation, Options Outstanding and Exercisable, by Exercise Price Range
Number of Shares	10
Weighted Average Remaining Contractual Life (years)	4.31
Weighted Average Exercise Price	$ 17.00
Range of Exercise Prices, Lower Limit	$ 16.51
Range of Exercise Prices, Upper Limit	$ 17.00

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-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 (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(a, b)

-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 (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted-average period remaining as of the balance sheet date until option expiration pertaining to the outstanding stock options for all option plans in the customized range of exercise prices, which may be expressed in a variety of ways (for example, years, months).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration