Employee benefit plans (Tables)

12 Months Ended

Dec. 31, 2024

Defined Benefit Plan Disclosure [Line Items]

Schedule of Components of Net Periodic Defined Benefit Pension Cost

	Years ended December 31,
	2022		2023		2024
	(In thousands)
Net periodic pension cost:
Interest cost	$	1,138	$	1,619	$	1,385
Expected return on plan assets		(1,552)		(1,452)		(1,340)
Plan settlement		104		4,911		—
Recognized actuarial losses		1,664		1,391		1,330
Total	$	1,354	$	6,469	$	1,375

Schedule of Defined Benefit Pension Plans

Defined Benefit Plan Disclosure [Line Items]

Expected Benefit Payments

Years ending December 31,	Amount
	(In thousands)
2025	$	2,886
2026		2,902
2027		2,886
2028		2,863
2029		2,859
Next 5 years		13,584

Funded Status of Defined Benefit Plans

	December 31,
	2023		2024
	(In thousands)
Change in projected benefit obligations ("PBO"):
Benefit obligations at beginning of the year	$	36,090	$	29,438
Interest cost		1,619		1,385
Plan settlement		(5,537)		—
Actuarial (gains) losses		265		(1,345)
Change in currency exchange rates		116		—
Benefits paid		(3,115)		(2,912)
Benefit obligations at end of the year		29,438		26,566
Change in plan assets:
Fair value of plan assets at beginning of the year		34,126		27,810
Actual return on plan assets		2,009		899
Employer contributions		196		1,005
Plan settlement		(5,537)		—
Change in currency exchange rates		131		—
Benefits paid		(3,115)		(2,912)
Fair value of plan assets at end of year		27,810		26,802
Funded status	$	(1,628)	$	236
Amounts recognized in the balance sheet:
Noncurrent pension asset	$	—	$	354
Accrued pension costs:
Current		(57)		(42)
Noncurrent		(1,571)		(76)
Total		(1,628)		236
Accumulated other comprehensive loss - actuarial losses, net		21,802		19,877
Total	$	20,174	$	20,113
Accumulated benefit obligations ("ABO")	$	29,438	$	26,566

Changes in Other Comprehensive Income (Loss)

	Years ended December 31,
	2022		2023		2024
	(In thousands)
Changes in plan assets and benefit obligations recognized in   other comprehensive income:
Net actuarial gain (loss) arising during the year	$	(1,034)	$	(574)	$	904
Plan settlement		104		4,911		—
Amortization of unrecognized net actuarial gain		1,664		1,391		1,330
Total	$	734	$	5,728	$	2,234

Information Concerning Defined Benefit Pension Plans (Including Certain Plans for Which ABO Exceeds Fair Value of Plan Assets)

	December 31,
	2023		2024
	(In thousands)
Plans for which the ABO exceeds plan assets:
PBO	$	29,438	$	118
ABO		29,438		118
Fair value of plan assets		27,810		—

Summary of Assumptions Used to Determine Net Benefit Obligation

	Years ended December 31,
Rate	2022		2023		2024
Discount rate	2.3	%	5.1	%	5.0	%
Long-term rate of return on plan assets	3.3	%	4.9	%	5.0	%

Schedule of composition of our pension plan assets by fair value level

	Fair Value Measurements
			Quoted prices		Significant other		Significant
			in active		observable		unobservable		Assets measured
	Total		markets (Level 1)		inputs (Level 2)		inputs (Level 3)		at NAV
	(In thousands)
December 31, 2023:
U.S.:
Equities	$	7,786	$	—	$	—	$	—	$	7,786
Fixed income		18,733		—		—		—		18,733
Cash and other		1,291		489		—		41		761
Total	$	27,810	$	489	$	—	$	41	$	27,280

	Fair Value Measurements
			Quoted prices		Significant other		Significant
			in active		observable		unobservable		Assets measured
	Total		markets (Level 1)		inputs (Level 2)		inputs (Level 3)		at NAV
	(In thousands)
December 31, 2024:
U.S.:
Equities	$	4,503	$	—	$	—	$	—	$	4,503
Fixed income		21,141		—		—		—		21,141
Cash and other		1,158		290		—		48		820
Total	$	26,802	$	290	$	—	$	48	$	26,464