Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2016	Sep. 30, 2015
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves, beginning balance		$ 1,127	$ 333
Additions (Reductions) Charged to Expense		359	487
Additions (Reductions) Charged to Other Accounts		(199)	307
Deductions	[1]	(581)	0
Valuation allowances and reserves, ending balance		706	1,127
Inventory obsolescence reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves, beginning balance		3,022	1,407
Additions (Reductions) Charged to Expense		571	138
Additions (Reductions) Charged to Other Accounts		0	1,804
Deductions	[2]	(285)	(327)
Valuation allowances and reserves, ending balance		3,308	3,022
Inventory LIFO reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves, beginning balance		8,508	7,879
Additions (Reductions) Charged to Expense		(482)	629
Additions (Reductions) Charged to Other Accounts		0	0
Deductions		0	0
Valuation allowances and reserves, ending balance		8,026	8,508
Deferred tax valuation allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves, beginning balance		1,095	822
Additions (Reductions) Charged to Expense		3,304	273
Additions (Reductions) Charged to Other Accounts		0	0
Deductions		0	0
Valuation allowances and reserves, ending balance		4,399	1,095
Workers’ compensation reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves, beginning balance		688	937
Additions (Reductions) Charged to Expense		157	626
Additions (Reductions) Charged to Other Accounts		0	(326)
Deductions	[3]	(521)	(549)
Valuation allowances and reserves, ending balance		$ 324	$ 688

[1] Accounts determined to be uncollectible, net of recoveries

[2] Inventory sold or otherwise disposed

[3] (c)Payment of workers’ compensation claims