Supplemental Balance Sheet, Income Statement and Cash Flow Information - Accumulated other comprehensive income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Changes in accumulated other comprehensive income (loss)
Beginning balance	$ 134,996
Other comprehensive income (loss), net of tax	17	$ 418	$ 206
Ending balance	590,727	134,996
Accumulated Other Comprehensive Income
Changes in accumulated other comprehensive income (loss)
Beginning balance	(10,414)	(10,832)
Other comprehensive income (loss) before reclassifications	(145)	256
Amounts reclassified from accumulated other comprehensive income (loss)	162	162
Other comprehensive income (loss), net of tax	17	418
Ending balance	(10,397)	(10,414)	(10,832)
Gains (losses) on cash flow hedges
Changes in accumulated other comprehensive income (loss)
Beginning balance	2	2
Ending balance	2	2	2
Defined benefit pension plan items
Changes in accumulated other comprehensive income (loss)
Beginning balance	(3,444)	(3,606)
Amounts reclassified from accumulated other comprehensive income (loss)	162	162
Other comprehensive income (loss), net of tax	162	162
Ending balance	(3,282)	(3,444)	(3,606)
Foreign currency items
Changes in accumulated other comprehensive income (loss)
Beginning balance	(6,972)	(7,228)
Other comprehensive income (loss) before reclassifications	(145)	256
Other comprehensive income (loss), net of tax	(145)	256
Ending balance	$ (7,117)	$ (6,972)	$ (7,228)