Reclassifications Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period			$ 923,741
Other comprehensive income (loss)	$ 5,154	$ (29,285)	16,789	$ (21,138)
Balance at end of period	831,131		831,131
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	(49,896)	(55,032)	(50,335)	(57,296)
Tax (benefit) expense	(46)	(950)	232	(1,966)
Reclassification from accumulated other comprehensive loss into net income	115	2,330	554	4,594
Balance at end of period	(49,781)	(52,702)	(49,781)	(52,702)
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	(24)	(48)	(48)	(96)
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	185	3,328	370	6,656
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	(14)	(2)	(5)
Other comprehensive income (loss)	0	(9)	2	(18)
Balance at end of period	0	(23)	0	(23)
Accumulated foreign currency adjustment attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(97,186)	(85,947)	(108,380)	(91,839)
Other comprehensive income (loss)	5,039	(31,606)	16,233	(25,714)
Balance at end of period	$ (92,147)	$ (117,553)	$ (92,147)	$ (117,553)