v3.26.3
Supplemental Balance Sheet and Income Statement - Accumulated other comprehensive income (loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Changes in accumulated other comprehensive income (loss)        
Beginning balance     $ 590,727  
Other comprehensive income (loss), net of tax $ 343 $ (294) (583) $ (548)
Ending balance 565,912   565,912  
Accumulated Other Comprehensive Income (Loss)        
Changes in accumulated other comprehensive income (loss)        
Beginning balance     (10,397) (10,414)
Other comprehensive income (loss) before reclassifications     (610) (669)
Amounts reclassified from accumulated other comprehensive income (loss)     27 121
Other comprehensive income (loss), net of tax     (583) (548)
Ending balance (10,980) (10,962) (10,980) (10,962)
Gains (losses) on cash flow hedges        
Changes in accumulated other comprehensive income (loss)        
Beginning balance     2 2
Ending balance 2 2 2 2
Defined benefit pension plan items        
Changes in accumulated other comprehensive income (loss)        
Beginning balance     (3,282) (3,444)
Amounts reclassified from accumulated other comprehensive income (loss)     27 121
Other comprehensive income (loss), net of tax     27 121
Ending balance (3,255) (3,323) (3,255) (3,323)
Foreign currency items        
Changes in accumulated other comprehensive income (loss)        
Beginning balance     (7,117) (6,972)
Other comprehensive income (loss) before reclassifications     (610) (669)
Other comprehensive income (loss), net of tax     (610) (669)
Ending balance $ (7,727) $ (7,641) $ (7,727) $ (7,641)