CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 30, 2016
Current assets:
Cash and cash equivalents	$ 62,961	$ 59,297
Restricted cash (Note 15)	1,923	5,446
Accounts receivable, less allowance for doubtful accounts of $402 and $468 at September 30, 2016 and December 31, 2016, respectively	52,875	61,612
Inventories	241,590	236,558
Income taxes receivable	3,286	538
Other current assets	3,906	2,809
Total current assets	366,541	366,260
Property, plant and equipment, net	198,751	199,182
Deferred income taxes	68,828	71,010
Prepayments and deferred charges	1,721	1,798
Goodwill	4,789	4,789
Other intangible assets, net	6,439	6,562
Total assets	647,069	649,601
Current liabilities:
Accounts payable	37,164	29,925
Accrued expenses	13,178	12,880
Accrued pension and postretirement benefits	5,095	5,095
Deferred revenue—current portion	2,908	7,488
Total current liabilities	58,345	55,388
Long-term obligations (less current portion)	8,022	8,256
Deferred revenue (less current portion)	22,204	22,829
Deferred income taxes	1,577	1,578
Accrued pension benefits (less current portion)	129,245	130,134
Accrued postretirement benefits (less current portion)	119,955	120,117
Total liabilities	339,348	338,302
Commitments and contingencies (Note 6)
Stockholders' equity:
Common stock, $0.001 par value (40,000,000 shares authorized, 12,520,308 and 12,545,483 shares issued and 12,491,149 and 12,510,307 outstanding at September 30, 2016 and December 31, 2016, respectively)	13	12
Preferred stock, $0.001 par value (20,000,000 shares authorized, 0 shares issued and outstanding)
Additional paid-in capital	247,182	246,625
Accumulated earnings	177,141	180,565
Treasury stock, 29,159 shares at September 30, 2016 and 35,176 shares at December 31, 2016	(1,646)	(1,380)
Accumulated other comprehensive loss	(114,969)	(114,523)
Total stockholders' equity	307,721	311,299
Total liabilities and stockholders' equity	$ 647,069	$ 649,601