CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents	$ 126,424	$ 82,433
Accounts receivable, net of allowance for credit losses of $7,078 in 2022 and $6,765 in 2021	416,568	258,635
Inventories	97,107	78,983
Income taxes receivable	42,403	58,504
Prepaid expenses	17,753	9,773
Other current assets	3,086	3,682
Total current assets	703,341	492,010
Property, plant and equipment, less accumulated depreciation of $775,334 in 2022 and $763,304 in 2021	333,093	254,408
Operating lease right-of-use assets	28,864	24,572
Finance lease right-of-use assets		20,327
Goodwill	32,150	32,150
Other assets	31,565	40,898
Total assets	1,129,013	864,365
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	115,213	74,404
Accrued payroll and related expenses	33,161	15,350
Accrued insurance expenses	3,232	10,129
Accrued state, local and other taxes	4,296	1,905
Income taxes payable	499	656
Pension liabilities	9,610
Current portion of operating lease liabilities	10,728	6,387
Current portion of finance lease liabilities		20,194
Other accrued expenses	1,864	1,824
Total current liabilities	178,603	130,849
Long-term accrued insurance expenses	7,149	11,770
Long-term pension and retirement plans liabilities	23,106	35,376
Deferred income taxes	37,473	17,749
Long-term operating lease liabilities	19,517	19,719
Other long-term liabilities	5,430	7,111
Total liabilities	271,278	222,574
Commitments and contingencies (Note 9)
STOCKHOLDERS' EQUITY
Preferred stock, $0.10 par value, 1,000,000 shares authorized, none issued
Common stock, $0.10 par value, 349,000,000 shares authorized, 216,609,191 and 215,628,716 shares issued and outstanding in 2022 and 2021, respectively	21,661	21,563
Capital in excess of par value	0	0
Retained earnings	856,013	640,936
Accumulated other comprehensive loss	(19,939)	(20,708)
Total stockholders' equity	857,735	641,791
Total liabilities and stockholders' equity	$ 1,129,013	$ 864,365