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EQUITY-BASED INCENTIVE AWARDS - Authorized and Approved Restricted Stock Unit Awards (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2016 | Oct. 31, 2015 | Oct. 31, 2014 | Oct. 31, 2013 | Sep. 30, 2017 | Sep. 30, 2016
Restricted Stock Units |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Original number of awards issued |  |  |  |  | 13,000 |
Non-vested awards outstanding at the end of the period (in shares) |  |  |  |  | 27,521 | 28,567
Direct cost to the recipients of the restricted stock units |  |  |  |  | $ 0 |
Compensation expense related to the amortization of all equity - based compensation awards |  |  |  |  | 1,300,000 | $ 1,300,000
Tax benefit related to compensation expense |  |  |  |  | 500,000 | 500,000
Total intrinsic value of equity-based compensation awards vested |  |  |  |  | 1,300,000 | $ 1,300,000
Total unamortized compensation expense |  |  |  |  | $ 1,300,000 |
Period over which unamortized compensation expense is expected to be amortized |  |  |  |  | 16 months |
Restricted Stock Units Awarded October 2013 |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Original number of awards issued |  |  |  | 17,600 |  |
Estimated fair value of award at grant date |  |  |  | $ 1,486,000 |  |
Non-vested awards outstanding at the end of the period (in shares) |  |  |  |  | 1,320 |
Fair value of non-vested awards at the end of the period |  |  |  |  | $ 122,000 |
Vested as of the end of the period (in shares) |  |  |  |  | 16,280 |
Units scheduled to vest |  |  |  |  | 1,320 |
Restricted Stock Units Awarded October 2014 |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Original number of awards issued |  |  | 13,000 |  |  |
Service period |  |  | 36 months |  |  |
Estimated fair value of award at grant date |  |  | $ 1,083,000 |  |  |
Non-vested awards outstanding at the end of the period (in shares) |  |  |  |  | 4,334 |
Fair value of non-vested awards at the end of the period |  |  |  |  | $ 400,000 |
Vested as of the end of the period (in shares) |  |  |  |  | 8,666 |
Units scheduled to vest |  |  |  |  | 4,334 |
Restricted Stock Units Awarded October 2015 |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Original number of awards issued |  | 13,250 |  |  |  |
Estimated fair value of award at grant date |  | $ 1,112,000 |  |  |  |
Non-vested awards outstanding at the end of the period (in shares) |  |  |  |  | 8,867 |
Fair value of non-vested awards at the end of the period |  |  |  |  | $ 818,000 |
Vested as of the end of the period (in shares) |  |  |  |  | 4,383 |
Restricted Stock Units Awarded October 2015 | Vesting of awards equally in two and three anniversaries from the date of grant |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Units scheduled to vest |  |  |  |  | 8,667 |
Restricted Stock Units Awarded October 2015 | Vesting of awards equally in two through five anniversaries from the date of grant |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Units scheduled to vest |  |  |  |  | 200 |
Restricted Stock Units Awarded October 2016 |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Original number of awards issued | 13,000 |  |  |  |  |
Service period | 36 months |  |  |  |  |
Estimated fair value of award at grant date | $ 1,191,000 |  |  |  |  |
Non-vested awards outstanding at the end of the period (in shares) |  |  |  |  | 13,000 |
Fair value of non-vested awards at the end of the period |  |  |  |  | $ 1,199,000 |
Units scheduled to vest |  |  |  |  | 13,000 |
Minimum | Restricted Stock Units Awarded October 2013 |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Service period |  |  |  | 36 months |  |
Minimum | Restricted Stock Units Awarded October 2015 |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Service period |  | 36 months |  |  |  |
Maximum | Restricted Stock Units Awarded October 2013 |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Service period |  |  |  | 60 months |  |
Maximum | Restricted Stock Units Awarded October 2015 |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Service period |  | 60 months |  |  |  |

X
- Definition Amount of direct cost applicable to the recipients of the 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 No definition available. + Details
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- Definition Represents the estimated fair value of equity-based awards on the grant date. + References No definition available. + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments or cash in accordance with the terms of the arrangement. + References No definition available. + Details
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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 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 + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + 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 (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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 + Details
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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 + Details
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