Pension Plans and Other Postretirement Benefit Plans - Narrative (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jan. 01, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Pension plans and other postretirement benefit plans
Accumulated other comprehensive income, tax impact		$ 200,000		$ 200,000		$ 200,000
Defined contribution plan, percentage that the employer contributes of employee contributions under 401(k) plan	100.00%			100.00%
Defined contribution plan, maximum percentage of employee compensation match by employer to defined contribution plan				6.00%
Defined contribution plan, additional maximum percentage of employee compensation match by employer to defined contribution plan	2.00%
Defined contribution plan, vesting requirement	3 years
Defined contribution plan, costs		900,000	$ 1,200,000	$ 2,200,000	$ 2,500,000
Non-U.S.
Pension plans and other postretirement benefit plans
Defined benefit plan expense		200,000	600,000	400,000	1,300,000
United States
Pension plans and other postretirement benefit plans
Defined benefit plan expense		1,600,000	1,700,000	3,100,000	3,200,000
Postretirement Health Care
Pension plans and other postretirement benefit plans
Long-term liability		2,100,000		2,100,000		2,200,000
Accumulated other comprehensive income		600,000		600,000		$ 700,000
Pension Plans | Non-U.S.
Pension plans and other postretirement benefit plans
Employer contributions		300,000	600,000	800,000	1,500,000
Pension Plans | United States
Pension plans and other postretirement benefit plans
Employer contributions		$ 600,000	$ 0	$ 700,000	$ 0