DISCONTINUED OPERATIONS - Income Statement Information (Details) - USD ($)		3 Months Ended		6 Months Ended
	Feb. 06, 2018	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		$ 0	$ 0	$ 0	$ 0
Income from discontinued operations (including a gain on sale, net of tax of $86,357 in 2018)		88,329,000	3,095,000	96,487,000	8,315,000
PPC [Member] | Discontinued Operations, Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		45,832,000	111,958,000	166,262,000	226,780,000
Cost of goods and services		36,157,000	95,277,000	132,100,000	190,715,000
Gross profit		9,675,000	16,681,000	34,162,000	36,065,000
Selling, general and administrative expenses		13,995,000	10,556,000	26,103,000	21,416,000
Income from discontinued operations		(4,320,000)	6,125,000	8,059,000	14,649,000
Gain on sale of business	$ 117,625,000	117,625,000	0	117,625,000
Interest expense, net		(95,000)	82,000	(155,000)	4,000
Other, net		166,000	(137,000)	(687,000)	(38,000)
Total other income (expense)		117,696,000	(55,000)	116,783,000	(34,000)
Income from discontinued operations (including a gain on sale, net of tax of $86,357 in 2018)		$ 113,376,000	$ 6,070,000	$ 124,842,000	$ 14,615,000