CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Sep. 30, 2016
Current assets:
Cash and cash equivalents	$ 54,365	$ 59,297
Restricted cash (Note 15)	423	5,446
Accounts receivable, less allowance for doubtful accounts of $402 and $550 at September 30, 2016 and March 31, 2017, respectively	65,225	61,612
Inventories	242,753	236,558
Income taxes receivable	6,541	538
Other current assets	3,684	2,809
Total current assets	372,991	366,260
Property, plant and equipment, net	197,262	199,182
Deferred income taxes	64,779	71,010
Prepayments and deferred charges	1,699	1,798
Goodwill	4,789	4,789
Other intangible assets, net	6,317	6,562
Total assets	647,837	649,601
Current liabilities:
Accounts payable	39,541	29,925
Accrued expenses	14,419	12,880
Accrued pension and postretirement benefits	5,095	5,095
Deferred revenue—current portion	2,500	7,488
Total current liabilities	61,555	55,388
Long-term obligations (less current portion)	7,994	8,256
Deferred revenue (less current portion)	21,579	22,829
Deferred income taxes	1,577	1,578
Accrued pension benefits (less current portion)	128,146	130,134
Accrued postretirement benefits (less current portion)	119,827	120,117
Total liabilities	340,678	338,302
Commitments and contingencies (Note 6)
Stockholders' equity:
Common stock, $0.001 par value (40,000,000 shares authorized, 12,520,308 and 12,542,908 shares issued and 12,491,149 and 12,507,732 outstanding at September 30, 2016 and March 31, 2017, respectively)	13	12
Preferred stock, $0.001 par value (20,000,000 shares authorized, 0 shares issued and outstanding)
Additional paid-in capital	247,849	246,625
Accumulated earnings	172,498	180,565
Treasury stock, 29,159 shares at September 30, 2016 and 35,176 shares at March 31, 2017	(1,646)	(1,380)
Accumulated other comprehensive loss	(111,555)	(114,523)
Total stockholders' equity	307,159	311,299
Total liabilities and stockholders' equity	$ 647,837	$ 649,601