ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGranted

No definition available.

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- Definition

The number of shares available for future issuance of stock options and restricted shares under the entity's various plans.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award options expiration period.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award other than options grants in period weighted average exercise price.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award other than options weighted average market value of underlying stock at grant date.

+ References

No definition available.

+ Details

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- Definition

Share Based Compensation Authorized Restricted Stock Units Outstanding Number Of Shares

+ References

No definition available.

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- Definition

Share based compensation net of tax.

+ References

No definition available.

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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- Definition

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.

+ References

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-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 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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- Definition

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.

+ References

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- Definition

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

+ Details

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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

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)(2)(iii)(1)

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

-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 Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-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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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ 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)(2)(i)-(ii)

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(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.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

+ Details

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.D.2)

-URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(i)

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

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ 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)(3)

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

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Summary of Significant Accounting Policies Stock-Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended		3 Months Ended	12 Months Ended					12 Months Ended										12 Months Ended			1 Months Ended		12 Months Ended
	Sep. 30, 2012	Aug. 31, 2010	Jan. 31, 2008	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2008	Jan. 08, 2008	Jul. 31, 2013 Total unvested stock-based compensation expense reversal [Domain]	Jul. 31, 2013 Unvested restricted stock expense reversal [Member]	Jul. 31, 2013 Unvested restricted stock expense reversal - service condition [Member]	Jul. 31, 2013 Unvested performance-based expense reversal [Domain]	Jul. 31, 2013 Service Based Option [Member]	Jul. 31, 2012 Service Based Option [Member]	Jul. 31, 2011 Service Based Option [Member]	Jul. 31, 2012 Performance Based Options [Member]	Jul. 31, 2011 Performance Based Options [Member]	Jul. 31, 2013 Nonvoting Common Stock [Member]	Jul. 31, 2013 Restricted Stock [Member] Maximum [Member]	Jul. 31, 2013 Restricted Stock [Member] Minimum [Member]	Jul. 31, 2013 Performance Based Options [Member]	Dec. 31, 2012 Cliff-Vested Restricted Shares [Member]	Jul. 31, 2013 Cliff-Vested Restricted Shares [Member]	Jul. 31, 2013 Cliff-Vested Restricted Shares [Member] Maximum [Member]	Jul. 31, 2013 Restricted Stock Units (RSUs) [Member] Maximum [Member]	Jul. 31, 2013 Service Based Option [Member]	Jul. 31, 2012 Service Based Option [Member]	Jul. 31, 2011 Service Based Option [Member]	Jul. 31, 2013 Service Based Option [Member] Maximum [Member]
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGranted																						5,000
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Options Expiration Period																					10 years					10 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	10,000	100,000		221,667				210,000															5,000
Shares outstanding, new grants																					0					828,450	1,212,450	1,365,500
Restricted stock units outstanding				10,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term													5 years 11 months 5 days	5 years 10 months 21 days	5 years 10 months 28 days	6 years 6 months 26 days	6 years 6 months 26 days
Share-based Compensation				$ 1,736	$ 9,735	$ 9,830			$ 7,883	$ 4,232	$ 1,502	$ 2,149
Share Based Compensation Net Of Tax				1,059	5,939	5,996
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 30.21						$ 32.83						$ 9.05	$ 8.42	$ 9.59	$ 10.01	$ 9.87					$ 32.99
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate													38.67%	39.41%	40.22%	39.21%	39.39%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate													2.21%	2.07%	1.94%	1.99%	1.96%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate													0.91%	1.16%	1.65%	2.05%	2.35%
Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Weighted Average Market Value Of Underlying Stock At Grant Date													$ 30.58	$ 27.05	$ 29.13	$ 29.55	$ 28.43
Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Grants In Period Weighted Average Exercise Price	$ 30.21	$ 28.35	$ 32.83										$ 30.58	$ 27.05	$ 29.13	$ 29.55	$ 28.35					$ 32.99
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period																			7 years	5 years				3 years	2 years				3 years
Outstanding stock options and restricted shares of Class A Nonvoting Common Stock																		5,150,975
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized For Future Issuance																		4,359,943
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized				$ 8,342
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition				1 year 8 months 12 days