Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Defined benefit plans:
Multiemployer pension plans	$ 429	$ 390	$ 1,311	$ 1,178
Defined contribution pension plans	2,974	2,870	9,507	7,936
Pension Plan | U.S. Plans
Defined benefit plans:
Service cost	0	0	0	0
Interest cost	1,203	1,845	3,609	5,535
Expected return on plan assets	(3,050)	(2,842)	(9,150)	(8,526)
Recognized prior service costs	0	0	0	0
Recognized loss	1,384	1,225	4,154	3,875
Defined benefit pension plans net periodic pension cost (benefit)	(463)	228	(1,387)	884
Defined benefit pension plan	451	453	3,768	2,940
Anticipated contributions to defined benefit pension plans during the remainder of the fiscal year	500		500
Pension Plan | International Plans
Defined benefit plans:
Service cost	489	448	1,482	1,303
Interest cost	3,184	4,474	9,619	13,104
Expected return on plan assets	(11,303)	(10,405)	(34,181)	(30,428)
Recognized prior service costs	125	113	381	326
Recognized loss	4,538	3,737	13,723	10,924
Defined benefit pension plans net periodic pension cost (benefit)	(2,967)	(1,633)	(8,976)	(4,771)
Defined benefit pension plan	4,549	$ 2,682	21,472	$ 14,235
Anticipated contributions to defined benefit pension plans during the remainder of the fiscal year	$ 3,300		$ 3,300