CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 12,264	$ 10,788	$ 0
Net cash provided by (used in) operating activities	7,554	(17,404)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(22,478)	(25,018)
Investment in unconsolidated joint venture	0	2,726
Acquired businesses, net of cash acquired	6,051	0
Investment sales	0	715
Proceeds from sale of assets	118	484
Net cash used in investing activities	(28,411)	(26,545)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	(15,073)	(10,910)
Proceeds from long-term debt	39,056	79,874
Payments of long-term debt	(8,827)	(24,126)
Change in short-term borrowings	(702)	(147)
Financing costs	(172)	0
Purchase of ESOP shares	(9,213)	0
Dividends paid	(2,499)	(2,281)
Other, net	(349)	203
Net cash provided by financing activities	2,221	42,613
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	(430)	(387)
Effect of exchange rate changes on cash and equivalents	(1,218)	(310)
NET DECREASE IN CASH AND EQUIVALENTS	(20,284)	(2,033)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	72,553	52,001	52,001
CASH AND EQUIVALENTS AT END OF PERIOD	52,269	49,968
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	12,264	10,788	0
Net cash provided by (used in) operating activities	(8,907)	(45,973)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(3)	(54)
Investment in unconsolidated joint venture		0
Acquired businesses, net of cash acquired	0
Investment sales		715
Proceeds from sale of assets	0	0
Net cash used in investing activities	(3)	661
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	(15,073)	(10,910)
Proceeds from long-term debt	32,213	62,000
Payments of long-term debt	(788)	(2,551)
Change in short-term borrowings	0	0
Financing costs	(172)
Purchase of ESOP shares	(9,213)
Dividends paid	(2,499)	(2,281)
Other, net	(349)	203
Net cash provided by financing activities	4,119	46,461
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	0	0
Effect of exchange rate changes on cash and equivalents	0	0
NET DECREASE IN CASH AND EQUIVALENTS	(4,791)	1,149
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	6,517	2,440	2,440
CASH AND EQUIVALENTS AT END OF PERIOD	1,726	3,589
Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	13,855	11,267	0
Net cash provided by (used in) operating activities	6,787	29,701
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(19,161)	(22,017)
Investment in unconsolidated joint venture		2,726
Acquired businesses, net of cash acquired	0
Investment sales		0
Proceeds from sale of assets	96	472
Net cash used in investing activities	(19,065)	(24,271)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	0	0
Proceeds from long-term debt	0	2,215
Payments of long-term debt	(554)	(524)
Change in short-term borrowings	0	0
Financing costs	0
Purchase of ESOP shares	0
Dividends paid	0	0
Other, net	(1,111)	(5,684)
Net cash provided by financing activities	(1,665)	(3,993)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	0	0
Effect of exchange rate changes on cash and equivalents	0	0
NET DECREASE IN CASH AND EQUIVALENTS	(13,943)	1,437
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	27,692	10,671	10,671
CASH AND EQUIVALENTS AT END OF PERIOD	13,749	12,108
Non-Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	13,813	11,259	0
Net cash provided by (used in) operating activities	9,674	(1,132)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(3,314)	(2,947)
Investment in unconsolidated joint venture		0
Acquired businesses, net of cash acquired	6,051
Investment sales		0
Proceeds from sale of assets	22	12
Net cash used in investing activities	(9,343)	(2,935)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	0	0
Proceeds from long-term debt	6,843	15,659
Payments of long-term debt	(7,485)	(21,051)
Change in short-term borrowings	(702)	(147)
Financing costs	0
Purchase of ESOP shares	0
Dividends paid	0	0
Other, net	1,111	5,684
Net cash provided by financing activities	(233)	145
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	(430)	(387)
Effect of exchange rate changes on cash and equivalents	(1,218)	(310)
NET DECREASE IN CASH AND EQUIVALENTS	(1,550)	(4,619)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	38,344	38,890	38,890
CASH AND EQUIVALENTS AT END OF PERIOD	36,794	34,271
Elimination [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	(27,668)	(22,526)	0
Net cash provided by (used in) operating activities	0	0
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	0	0
Investment in unconsolidated joint venture		0
Acquired businesses, net of cash acquired	0
Investment sales		0
Proceeds from sale of assets	0	0
Net cash used in investing activities	0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	0	0
Proceeds from long-term debt	0	0
Payments of long-term debt	0	0
Change in short-term borrowings	0	0
Financing costs	0
Purchase of ESOP shares	0
Dividends paid	0	0
Other, net	0	0
Net cash provided by financing activities	0	0
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	0	0
Effect of exchange rate changes on cash and equivalents	0	0
NET DECREASE IN CASH AND EQUIVALENTS	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	0	0	$ 0
CASH AND EQUIVALENTS AT END OF PERIOD	$ 0	$ 0