Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Consolidated Income (loss) from Continuing Operations Before Income Taxes by Location

The “Income before income tax expense” line item in the consolidated statements of operations consisted of:

(Dollars in thousands)	2022		2021		2020
Domestic	$	58,390	$	34,435	$	(4,371)
International	81,990		91,845		72,905
Total	$	140,380	$	126,280	$	68,534

Schedule of Income Tax Expense (Benefit) by Location

The “Income tax expense” line item in the consolidated statements of operations consisted of:

(Dollars in thousands)	Current		Deferred		Total
2022
Domestic	$	26,666	$	(18,730)	$	7,936
International	17,641		(1,826)		15,815
Total	$	44,307	$	(20,556)	$	23,751
2021
Domestic	$	5,155	$	(2,938)	$	2,217
International	16,187		(257)		15,930
Total	$	21,342	$	(3,195)	$	18,147
2020
Domestic	$	5,340	$	(11,012)	$	(5,672)
International	26,610		(2,394)		24,216
Total	$	31,950	$	(13,406)	$	18,544

Schedule of Deferred Tax Assets and Liabilities

Deferred tax assets and liabilities as of December 31, 2022 and 2021, were comprised of the following:

(Dollars in thousands)	2022		2021
Deferred tax assets
Accrued employee benefits and compensation	$	8,678	$	10,647
Net operating loss carryforwards	4,433		3,785
Tax credit carryforwards	2,823		13,170
Reserves and accruals	4,716		5,145
Operating leases	4,227		4,191
Capitalized research and development	21,305		16,622
Other	10,205		5,299
Total deferred tax assets	56,387		58,859
Less deferred tax asset valuation allowance	(2,843)		(9,775)
Total deferred tax assets, net of valuation allowance	53,544		49,084
Deferred tax liabilities
Depreciation and amortization	14,368		32,669
Postretirement benefit obligations	687		2,071
Unremitted earnings	2,551		2,335
Operating leases	4,618		4,422
Other	4,228		4,367
Total deferred tax liabilities	26,452		45,864
Net deferred tax asset (liability)	$	27,092	$	3,220

Schedule of Effective Income Tax Rate Reconciliation

Income tax expense differs from the amount computed by applying the U.S. federal statutory income tax rate to income before income taxes. The reasons for this difference were as follows:

(Dollars in thousands)	2022		2021		2020
Tax expense at Federal statutory income tax rate	$	29,480	$	26,519	$	14,392
Impact of foreign operations	1,531		2,020		1,193
Foreign source income, net of tax credits	(6,461)		(4,944)		1,050
State tax, net of federal	6,898		175		(313)
Unrecognized tax benefits	1,921		(8,823)		5,800
Equity compensation excess tax deductions	(3,025)		262		(791)
General business credits	(821)		(867)		(931)
Distribution related foreign taxes	1,504		2,516		2,332
Executive compensation limitation	2,859		1,570		900
Valuation allowance change	(6,932)		525		(5,375)
Disproportionate tax effect of pension settlement charges	—		—		—
Other	(3,203)		(806)		287
Income tax expense (benefit)	$	23,751	$	18,147	$	18,544

Schedule of Reconciliation of Unrecognized Tax Benefits

Unrecognized tax benefits, excluding potential interest and penalties, for the years ended December 31, 2022 and 2021, were as follows:

(Dollars in thousands)	2022		2021
Beginning balance as of January 1	$	6,583	$	15,688
Gross increases - current period tax positions	3,402		1,046
Gross increases - tax positions in prior periods	237		1,150
Gross decreases - tax positions in prior periods	(178)		(9,151)
Foreign currency exchange	(147)		(10)
Settlements	(1,028)		(2,140)
Ending balance as of December 31	$	8,869	$	6,583