Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 20,206	$ 41,844
Accounts receivable	134,174	124,014
Inventories	216,443	220,352
Prepaid and other current assets	25,584	24,733
Total current assets	396,407	410,943
Long-term deferred income taxes	17,616	17,047
Property, plant, and equipment	886,653	891,789
Less allowances for depreciation, depletion, and amortization	(629,953)	(636,211)
Property, plant, and equipment—net	256,700	255,578
Intangible assets	8,857	9,847
Other assets	7,376	6,992
Goodwill	90,922	90,677
Total Assets	777,878	791,084
Current liabilities
Short-term debt	787	777
Accounts payable	53,496	49,059
Salaries and wages	23,959	42,694
Other liabilities and accrued items	27,423	28,044
Income taxes	2,680	1,084
Unearned revenue	5,417	5,451
Total current liabilities	113,762	127,109
Other long-term liabilities	30,579	30,967
Retirement and post-employment benefits	85,660	93,225
Unearned income	35,820	36,905
Long-term income taxes	4,867	4,857
Deferred income taxes	218	213
Long-term debt	2,643	2,827
Serial preferred stock	0	0
Common stock	227,694	223,484
Retained earnings	545,093	536,116
Common stock in treasury	(171,574)	(166,128)
Accumulated other comprehensive loss	(101,221)	(102,937)
Other equity transactions	4,337	4,446
Total shareholders' equity	504,329	494,981
Total Liabilities and Shareholders’ Equity	$ 777,878	$ 791,084