Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 28, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 74,856	$ 70,645
Accounts receivable	142,327	130,538
Inventories, net	213,329	214,871
Prepaid and other current assets	23,904	23,299
Total current assets	454,416	439,353
Deferred income taxes	1,052	5,616
Property, Plant and Equipment	913,325	898,251
Less allowances for depreciation, depletion, and amortization	(669,861)	(647,233)
Property, plant, and equipment—net	243,464	251,018
Operating lease, right-of-use asset	26,788	0
Intangible assets	5,213	6,461
Other assets	15,280	7,236
Goodwill	90,633	90,657
Total Assets	836,846	800,341
Current liabilities
Short-term debt	847	823
Accounts payable	41,658	49,622
Salaries and wages	36,250	47,501
Other liabilities and accrued items	38,482	33,301
Income taxes	1,971	2,615
Unearned revenue	5,829	5,918
Total current liabilities	125,037	139,780
Other long-term liabilities	11,419	14,764
Operating lease liabilities	21,118	0
Finance lease liabilities	18,325	15,221
Retirement and post-employment benefits	30,663	38,853
Unearned income	30,354	32,563
Long-term income taxes	3,093	2,993
Deferred income taxes	383	195
Long-term debt	1,669	2,066
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 28 and December 31)	245,785	234,704
Retained earnings	576,211	548,374
Common stock in treasury	(187,224)	(175,426)
Accumulated other comprehensive loss	(43,978)	(58,234)
Other equity	3,991	4,488
Total shareholders' equity	594,785	553,906
Total Liabilities and Shareholders’ Equity	$ 836,846	$ 800,341