CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 82,646	$ 50,023
Accounts receivable, net	247,965	242,574
Inventories	97,267	100,947
Income taxes receivable	35,000	24,145
Prepaid expenses	8,701	10,459
Assets held for sale	5,385	5,385
Other current assets	2,860	3,325
Current assets	479,824	436,858
Property, plant and equipment, net	295,262	516,727
Operating lease right-of-use assets	33,250	33,850
Goodwill	32,150	32,150
Other assets	28,646	33,633
Total assets	869,132	1,053,218
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	70,601	53,147
Accrued payroll and related expenses	19,791	19,641
Accrued insurance expenses	7,092	7,540
Accrued state, local and other taxes	3,774	2,427
Income taxes payable	1,791	1,534
Current portion of operating lease liabilities	10,215	10,625
Other accrued expenses	4,914	6,488
Current liabilities	118,178	101,402
Long-term accrued insurance expenses	14,865	14,040
Long-term pension liabilities	33,208	39,254
Deferred income taxes	4,068	37,319
Long-term operating lease liabilities	27,529	28,378
Other long-term liabilities	49	2,492
Total liabilities	197,897	222,885
STOCKHOLDER'S EQUITY
Common stock	21,526	21,443
Capital in excess of par value
Retained earnings	672,912	832,113
Accumulated other comprehensive loss	(23,203)	(23,223)
Total stockholders' equity	671,235	830,333
Total liabilities and stockholders' equity	$ 869,132	$ 1,053,218