Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 29, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 42,895	$ 41,844
Accounts receivable	135,699	124,014
Inventories	209,204	220,352
Prepaid and other current assets	19,617	24,733
Total current assets	407,415	410,943
Long-term deferred income taxes	16,588	17,047
Property, plant, and equipment	894,306	891,789
Less allowances for depreciation, depletion, and amortization	(637,730)	(636,211)
Property, plant, and equipment—net	256,576	255,578
Intangible assets—net	7,899	9,847
Other assets	6,991	6,992
Goodwill	90,697	90,677
Total Assets	786,166	791,084
Current liabilities
Short-term debt	798	777
Accounts payable	46,240	49,059
Salaries and wages	32,299	42,694
Other liabilities and accrued items	27,182	28,044
Income taxes	2,994	1,084
Unearned revenue	7,576	5,451
Total current liabilities	117,089	127,109
Other long-term liabilities	14,203	14,895
Capital lease obligations	15,896	16,072
Retirement and post-employment benefits	80,944	93,225
Unearned income	34,734	36,905
Long-term income taxes	4,896	4,857
Long-term deferred income taxes	210	213
Long-term debt	2,453	2,827
Serial preferred stock	0	0
Common stock	230,763	223,484
Retained earnings	553,523	536,116
Common stock in treasury	(173,825)	(166,128)
Accumulated other comprehensive loss	(99,106)	(102,937)
Other equity transactions	4,386	4,446
Total shareholders' equity	515,741	494,981
Total Liabilities and Shareholders’ Equity	$ 786,166	$ 791,084