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REPORTABLE SEGMENTS - Schedule of summary of segment depreciation and amortization and capital expenditures (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	$ 52,302	$ 52,100	$ 51,517
Subtotal	62,565	61,794	61,290
CAPITAL EXPENDITURES	36,951	41,168	34,869
Subtotal	47,256	48,650	44,818
Discontinued Operations, Held-for-sale | Defense Electronics
Segment Reporting Information [Line Items]
Depreciation and amortization from Defense Electronics	10,762	10,645	10,667
Capital expenditures from Defense Electronics	10,343	7,830	10,492
Operating
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	51,803	51,149	50,623
CAPITAL EXPENDITURES	36,913	40,820	34,326
Corporate
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	499	951	894
CAPITAL EXPENDITURES	38	348	543
Consumer and Professional Products
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	34,433	32,788	32,289
CAPITAL EXPENDITURES	28,265	23,321	17,828
Home and Building Products
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	17,370	18,361	18,334
CAPITAL EXPENDITURES	$ 8,648	$ 17,499	$ 16,498

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- Definition

Depreciation, Depletion and Amortization, Including Discontinued Operation

+ References

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- Definition

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- Definition

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+ References

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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- Definition

Amount of depreciation and amortization expense attributable to disposal group, including, but not limited to, discontinued operation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

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- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585

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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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