Share based compensation arrangement by share based payment award number of non employee directors.

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Schedule

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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) per non-employee.

+ References

No definition available.

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- Definition

Share based compensation arrangements by share based payment award grant date market price of common stock.

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- Definition

Share based compensation arrangements by share based payment award term of vested options.

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No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ 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.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section F

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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.

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

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

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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 Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=56944662&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.

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Reference 1: 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

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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

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

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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).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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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)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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.

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No definition available.

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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).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
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- Definition

Gross number of share options (or share units) granted during the period.

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No definition available.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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- Definition

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

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- Definition

Period from grant date that an equity-based award expires, 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
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-SubTopic 10
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-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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

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- Definition

Number of shares (or other type of equity) forfeited during the period.

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No definition available.

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Stock-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Thousands				1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 06, 2017 USD ($) $ / shares shares	Dec. 19, 2016 $ / shares shares	Jan. 04, 2016 director $ / shares shares	Jan. 31, 2017 USD ($) $ / shares shares	Apr. 30, 2017 USD ($)	Apr. 30, 2016 USD ($)	Apr. 30, 2017 USD ($) $ / shares shares	Apr. 30, 2016 USD ($)	Apr. 30, 2011 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense \| $							$ 2,658	$ 1,019
Chief Operating Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price of common stock at grant date \| $ / shares	$ 58.05
Stock compensation expense \| $	$ 700
Unvested portion of restricted stock forfeited	12,800
Granted	12,800
Vice President [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense \| $							$ 500
Vested, Number of Shares				13,040
Board of Director Members for January Two Thousand Seventeen Option Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of vested stock options				5 years
Market price of common stock at grant date \| $ / shares				$ 56.65
Vesting period				5 years
Estimated fair market value of options \| $				$ 200
Stock options total compensation cost, not yet recognized \| $				$ 200
Remaining service period for recognition of unrecognized compensation cost							60 months
Granted				10,000
Exercised, Weighted-Average Exercise Price \| $ / shares				$ 56.65
Stock Options [Member] \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							1 year
Expiration period, after grant date							2 years
Stock Options [Member] \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							5 years
Expiration period, after grant date							5 years
2005 Stock Incentive Plan [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised, Weighted-Average Exercise Price \| $ / shares							$ 14.58
2011 Management Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares authorized under ESPP									1,500,000
Number of non-employee directors \| director			12
2011 Management Incentive Plan [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted per non-employee			1,750
Restricted stock closing price awarded \| $ / shares							$ 57.62
Restricted shares granted			21,000				103,000
Recognized stock-based compensation expense \| $					$ 800	$ 600	$ 2,700	$ 1,000
Vested, Number of Shares							69,000
2011 Management Incentive Plan [Member] \| Restricted Stock [Member] \| Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price \| $ / shares			$ 62.65
Recognized stock-based compensation expense \| $					300		$ 400
2011 Management Incentive Plan [Member] \| Restricted Stock [Member] \| Executive Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted		70,327
Stock price \| $ / shares		$ 56.20
Recognized stock-based compensation expense \| $					$ 300		$ 400
Shares vesting schedule per year		.33
2011 Management Incentive Plan [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted							10,000
Exercised, Weighted-Average Exercise Price \| $ / shares							$ 21.80