Supplementary Balance Sheet Detail

12 Months Ended

Dec. 31, 2022

The following tables present supplementary balance sheet details:


	December 31, 2022		December 31, 2021
	(Dollars in thousands)
Inventories:
Raw materials and supplies	$	216,761	$	132,113
Work in process	192,821		127,127
Finished goods	38,159		30,192
	$	447,741	$	289,432
Prepaid expenses and other current assets:
Prepaid expenses	$	15,261	$	8,193
Value-added tax and other indirect taxes receivable	39,417		40,861
Spare parts inventory	12,990		12,408
Other current assets	19,604		11,902
	$	87,272	$	73,364
Property, plant and equipment:
Land and improvements	$	48,478	$	49,201
Buildings	82,054		79,660
Machinery and equipment and other	655,823		621,808
Construction in progress	82,813		64,629
	$	869,168	$	815,298
Other accrued liabilities:
Payrolls (including incentive programs)	$	10,799	$	16,904
Employee benefits	6,921		7,272
Deferred revenue	27,878		9,840
Other	43,751		22,389
	$	89,349	$	56,405
Other long-term obligations:
Post-employment benefits	$	11,996	$	14,597
Pension and related benefits	22,768		31,139
Other	16,058		22,921
	$	50,822	$	68,657

The following table presents an analysis of the allowance for doubtful accounts for the years ended December 31:


	2022		2021		2020
	(Dollars in thousands)
Balance at beginning of year	$	6,835	$	8,243	$	5,474
Charge to retained earnings - ASC 326 adoption impact	—		—		2,026
Charge (credit) to income	1,585		(1,266)		1,458
Deductions	(401)		(142)		(715)
Balance at end of year	$	8,019	$	6,835	$	8,243