BUSINESS SEGMENTS - Depreciation, Amortization And Capital Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Segment depreciation and amortization	$ 14,047	$ 12,221	$ 40,318	$ 36,356
CAPITAL EXPENDITURES	11,520	7,037	33,148	22,575
Home And Building Products [Member]
Segment Reporting Information [Line Items]
Segment depreciation and amortization	11,251	9,426	31,888	27,845
CAPITAL EXPENDITURES	9,761	5,853	24,611	16,012
Telephonics [Member]
Segment Reporting Information [Line Items]
Segment depreciation and amortization	2,676	2,670	8,090	8,157
CAPITAL EXPENDITURES	1,632	1,161	6,017	4,274
Operating Segments [Member]
Segment Reporting Information [Line Items]
Segment depreciation and amortization	13,927	12,096	39,978	36,002
CAPITAL EXPENDITURES	11,393	7,014	30,628	20,286
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Segment depreciation and amortization	120	125	340	354
CAPITAL EXPENDITURES	$ 127	$ 23	$ 2,520	$ 2,289

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&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.

+ References

No definition available.

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