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SHARE-BASED PAYMENTS (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013
All Plans [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Total stock-based compensation cost | $ 9,097 | $ 6,812 | $ 5,562
Future income tax benefit from compensation expense recognized | 3,548 | 2,657 | 2,169
Cash received from stock options exercised | 4,015 | 7,951 | 974
Tax benefit realized from options exercised | $ 350 | $ 698 | 99
All Plans [Member] | Stock Options [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 33.00% |  |
Expiration period | 10 years |  |
Restricted stock activity [Roll Forward] |  |  |
Expired or forfeited (in shares) | (68,837) |  |
Stock option activity [Roll Forward] |  |  |
Outstanding, beginning of period (in shares) | 512,322 |  |
Exercised (in shares) | (105,211) |  |
Expired or forfeited (in shares) | (69,173) |  |
Outstanding, end of period (in shares) | 337,938 | 512,322 |
Exercisable (in shares) | 171,532 |  |
Outstanding, weighted-average exercise price, beginning of period (in dollars per share) | $ 38.62 |  |
Exercised, weighted-average exercise price (in dollars per share) | 38.17 |  |
Expired or forfeited, weighted-average exercise price (in dollars per share) | 36.53 |  |
Outstanding, weighted-average exercise price, end of period (in dollars per share) | 39.19 | $ 38.62 |
Exercisable, weighted-average exercise price (in dollars per share) | $ 39.55 |  |
Outstanding, weighted-average remaining contractual term | 8 months 12 days |  |
Outstanding, aggregate intrinsic value | $ 3,304 |  |
Exercisable, weighted-average remaining contractual term | 9 months 18 days |  |
Exercisable, aggregate intrinsic value | $ 1,616 |  |
Intrinsic value of options exercised | $ 931 | $ 1,653 | $ 294
Non-vested options activity [Roll Forward] |  |  |
Non-vested at beginning of period (in shares) | 312,442 |  |
Vested (in shares) | 77,199 |  |
Expired or forfeited (in shares) | (68,837) |  |
Non-vested at end of period (in shares) | 320,804 | 312,442 |
Non-vested weighted-average grant-date fair value, beginning of period (in dollars per share) | $ 11.21 |  |
Vested, weighted-average grant-date fair value (in dollars per share) | 12.23 |  |
Expired or forfeited, weighted-average grant-date fair value (in dollars per share) | 11.70 |  |
Non-vested weighted-average grant-date fair value, end of period (in dollars per share) | $ 11.35 | $ 11.21 |
All Plans [Member] | Stock Options [Member] | After 3 Years [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 33.00% |  |
Vesting period | 3 years |  |
All Plans [Member] | Stock Options [Member] | After 4 Years [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting period | 4 years |  |
All Plans [Member] | Stock Options [Member] | After 5 Years [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting period | 5 years |  |
All Plans [Member] | Restricted Stock [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Expiration period | 5 years |  |
Restricted stock activity [Roll Forward] |  |  |
Non-vested at beginning of period (in shares) | 575,150 |  |
Granted (in shares) | 215,370 |  |
Vested (in shares) | (183,089) |  |
Expired or forfeited (in shares) | (36,864) |  |
Non-vested at end of period (in shares) | 570,567 | 575,150 |
Non-vested weighted-average grant-date fair value, beginning of period (in dollars per share) | $ 33.83 |  |
Granted, weighted-average grant-date fair value (in dollars per share) | 40.07 |  |
Vested, weighted-average grant-date fair value (in dollars per share) | 36.51 |  |
Expired or forfeited, weighted-average grant-date fair value (in dollars per share) | 28.70 |  |
Non-vested weighted-average grant-date fair value, end of period (in dollars per share) | $ 35.66 | $ 33.83 |
Unrecognized compensation cost [Abstract] |  |  |
Unrecognized compensation cost on non-vested awards | $ 7,681 |  |
Weighted average period of recognition of unrecognized compensation cost on non-vested awards | 1 year 7 months 6 days |  |
Non-vested options activity [Roll Forward] |  |  |
Expired or forfeited (in shares) | (36,864) |  |
Fair value assumptions [Abstract] |  |  |
Expected volatility | 22.20% | 26.60% | 29.50%
Dividend yield | 1.00% | 1.10% | 1.20%
Average risk free interest rate | 1.70% | 1.40% | 0.60%
Weighted average expected term | 1 year 9 months 18 days | 2 years | 2 years
All Plans [Member] | Restricted Stock [Member] | After 3 Years [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 50.00% |  |
Vesting period | 3 years |  |
All Plans [Member] | Restricted Stock [Member] | Attainment of Pre-Defined Levels of Appreciation in Market Value [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 16.66% |  |
All Plans [Member] | Restricted Stock [Member] | Fiscal 2013 and Thereafter [Member] | After 3 Years [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 50.00% |  |
Vesting period | 3 years |  |
All Plans [Member] | Restricted Stock [Member] | Fiscal 2013 and Thereafter [Member] | Attainment of Pre-Defined Levels of Appreciation in Market Value [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 8.33% |  |
All Plans [Member] | Restricted Stock [Member] | Fiscal 2013 and Thereafter [Member] | Attainment of Pre-Defined Levels of Adjusted Earnings Per Share [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 8.33% |  |
2012 Equity Incentive Plan [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Term of plan | 10 years |  |
Maximum number of shares available for grants or awards (in shares) | 2,500,000 |  |
Shares reserved for future issuance under award plan (in shares) | 1,476,798 |  |
Director Fee Plans [Member] |  |  |
Director Fee Plan, aggregate disclosures [Abstract] |  |  |
Shares deferred under the director fee plan (in shares) | 17,005 |  |
Value of annual stock-based grant | $ 110 |  |
Total stock options granted to date (in shares) | 22,300 |  |
Option awards outstanding and vested (in shares) | 0 |  |
Total restricted stock awards granted to date (in shares) | 136,568 |  |
Restricted stock awards unvested (in shares) | 33,418 |  |
2014 Director Fee Plan [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Shares reserved for future issuance under award plan (in shares) | 150,000 |  |
Director Fee Plan, aggregate disclosures [Abstract] |  |  |
Annual retainer fee paid to non-employee directors | $ 75 |  |
Annual retainer fee paid to non-employee chairman of the board | $ 175 |  |

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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 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 + 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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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + 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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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting 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 (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan 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 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 + Details
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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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + 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 (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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 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 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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