Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 26, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 265,068	$ 125,007
Accounts receivable, net	146,527	154,751
Inventories, net	209,847	190,390
Prepaid and other current assets	29,191	21,839
Assets held for sale	5,811	0
Total current assets	656,444	491,987
Deferred income taxes	1,669	1,666
Property, plant, and equipment	924,620	916,965
Less allowances for depreciation, depletion, and amortization	(685,355)	(684,689)
Property, plant, and equipment—net	239,265	232,276
Operating lease right-of-use assets	48,942	23,413
Intangible assets	5,732	6,380
Other assets	19,169	17,937
Goodwill	70,001	79,011
Total Assets	1,041,222	852,670
Current liabilities
Short-term debt	151,731	868
Accounts payable	52,093	43,206
Salaries and wages	24,367	41,167
Other liabilities and accrued items	33,429	32,477
Income taxes	1,779	1,342
Unearned revenue	3,003	3,380
Liabilities held for sale	2,126	0
Total current liabilities	268,528	122,440
Other long-term liabilities	10,117	11,560
Operating lease liabilities	44,830	18,091
Finance lease liabilities	16,939	17,424
Retirement and post-employment benefits	32,389	32,466
Unearned income	57,799	32,891
Long-term income taxes	3,508	3,451
Deferred income taxes	2,172	2,410
Long-term debt	0	1,260
Serial preferred stock (no par value; 5,000 authorized shares, none issued)	0	0
Common stock (no par value; 60,000 authorized shares, issued shares of 27,148 at June 26 and December 31)	256,756	249,674
Retained earnings	588,803	589,888
Common stock in treasury	(198,726)	(186,845)
Accumulated other comprehensive loss	(45,571)	(45,462)
Other equity	3,678	3,422
Total shareholders' equity	604,940	610,677
Total Liabilities and Shareholders’ Equity	$ 1,041,222	$ 852,670