CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income including non-controlling interests	$ 472,224	$ 276,580	$ 206,144
Unrealized gain on derivatives designated and qualifying as cash flow hedges, net of tax of $3,099 in 2022; $1,523 in 2021; $605 in 2020	5,815	5,607	861
Defined pension plan activity, net of tax of $964 in 2022; $33,214 in 2021; $(10,622) in 2020	11,450	88,539	(31,224)
Currency translation adjustment	(35,084)	(49,745)	4,068
Other comprehensive (loss) income:	(17,819)	44,401	(26,295)
Comprehensive income	454,405	320,981	179,849
Comprehensive income (loss) attributable to non-controlling interests	94	(289)	74
Comprehensive income attributable to shareholders	$ 454,311	$ 321,270	$ 179,775