CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Sep. 30, 2016
Current assets:
Cash and cash equivalents	$ 48,477	$ 59,297
Restricted cash (Note 15)	0	5,446
Accounts receivable, less allowance for doubtful accounts of $402 and $573 at September 30, 2016 and June 30, 2017, respectively	61,076	61,612
Inventories	247,396	236,558
Income taxes receivable	3,720	538
Other current assets	2,714	2,809
Total current assets	363,383	366,260
Property, plant and equipment, net	196,177	199,182
Deferred income taxes	70,591	71,010
Prepayments and deferred charges	1,626	1,798
Goodwill	4,789	4,789
Other intangible assets, net	6,193	6,562
Total assets	642,759	649,601
Current liabilities:
Accounts payable	37,084	29,925
Accrued expenses	14,368	12,880
Accrued pension and postretirement benefits	5,095	5,095
Deferred revenue—current portion	2,500	7,488
Total current liabilities	59,047	55,388
Long-term obligations (less current portion)	7,966	8,256
Deferred revenue (less current portion)	20,954	22,829
Deferred income taxes	1,577	1,578
Accrued pension benefits (less current portion)	127,030	130,134
Accrued postretirement benefits (less current portion)	120,187	120,117
Total liabilities	336,761	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 June 30, 2017, respectively)	13	12
Preferred stock, $0.001 par value (20,000,000 shares authorized, 0 shares issued and outstanding)
Additional paid-in capital	248,185	246,625
Accumulated earnings	165,779	180,565
Treasury stock, 29,159 shares at September 30, 2016 and 35,176 shares at June 30, 2017	(1,646)	(1,380)
Accumulated other comprehensive loss	(106,333)	(114,523)
Total stockholders' equity	305,998	311,299
Total liabilities and stockholders' equity	$ 642,759	$ 649,601