Reclassifications Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period			$ 966,802
Reclassification from accumulated other comprehensive loss into net income (loss)(b)	$ (1,200)	$ 0	(1,200)	$ 0
Other comprehensive income (loss)	(8,000)	5,154	(18,299)	16,789
Balance at end of period	1,033,647		1,033,647
Accumulated defined benefit plans adjustment attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(42,278)	(49,896)	(42,652)	(50,335)
Tax (benefit) expense	(240)	(46)	(254)	232
Reclassification from accumulated other comprehensive loss into net income (loss)(b)	2,022	115	2,396	554
Balance at end of period	(40,256)	(49,781)	(40,256)	(49,781)
Accumulated defined benefit plans adjustment, net prior service attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive loss	(9)	(24)	(18)	(48)
Accumulated defined benefit plans adjustment, net gain (loss) attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive loss	2,271	185	2,668	370
Accumulated net investment gain (loss) attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	0	0	0	(2)
Other comprehensive income (loss)	0	0	0	2
Balance at end of period	0	0	0	0
Accumulated foreign currency adjustment attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(97,270)	(97,186)	(86,597)	(108,380)
Reclassification from accumulated other comprehensive loss into net income (loss)(b)	(1,200)	0	(1,200)	0
Other comprehensive income (loss)	(8,822)	5,039	(19,495)	16,233
Balance at end of period	$ (107,292)	$ (92,147)	$ (107,292)	$ (92,147)