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Derivative Financial Instruments - Outstanding derivative financial instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018
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Interest rate swap |  |  |
DERIVATIVE FINANCIAL INSTRUMENTS |  |  |
Notional amount |  | $ 150,000 | $ 150,000
Fair Value |  | $ (19) |
Fix Rate |  | 2.09% |
Interest rate swap one |  |  |
DERIVATIVE FINANCIAL INSTRUMENTS |  |  |
Notional amount | [1] | $ 150,000 |
Fair Value | [1] | $ (1,143) |
Fix Rate | [1] | 2.24% |
Forward contracts |  |  |
DERIVATIVE FINANCIAL INSTRUMENTS |  |  |
Notional amount |  | $ 5,750 |
Fair Value |  | $ (35) |
[1] | This swap represents a forward contract and will be effective in November 2019.

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- Definition Aggregate net fair value of all derivative instruments designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations. + References No definition available. + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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