Pension and Other Postretirement Benefits - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Description of Defined Contribution Plan	The Company has a 401(k) plan with an employer match covering a majority of its U.S. employees. The plan allows for and the Company previously paid a nonelective contribution on behalf of participants who have completed one year of service equal to 3% of the eligible participants’ compensation in the form of Company common stock.
Total Contribution Amount	$ 4,000	$ 3,100	$ 2,900
Defined Benefit Plan Explanation Of Significant Change In Benefit Obligation Or Plan Assets Not Apparent From Other Required Disclosures	During the second quarter of 2017, the Legacy Quaker U.S. Pension Plan offered a cash settlement to its vested terminated participants, which allowed them to receive the value of their pension benefits as a single lump sum payment. As payments from the Legacy Quaker U.S. Pension Plan for this cash out offering exceeded the service and interest cost components of the Legacy Quaker U.S. Pension Plan expense for the year ended December 31, 2017, the Company recorded a settlement charge of approximately $1.9 million. This settlement charge represented the immediate recognition into expense of a portion of the unrecognized loss within AOCI on the balance sheet in proportion to the share of the projected benefit obligation that was settled by these payments. The gross pension benefit obligation was reduced by approximately $4.0 million as a result of these payments.
Pooled Separate account percentage	As of December 31, 2019, the U.S. pension plan pooled separate accounts included approximately 60 percent of investments in equity securities and 40 percent of investments in fixed income securities.
Defined Benefit Plans Investment Description	As of December 31, 2019, the diversified investment funds included approximately 65 percent of investments in equity securities, 24 percent of investments in fixed income securities, and 11 percent of other alternative investments.
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	$ 366,000	165,300
Gross AOCI	(68,105)	(43,902)
Domestic plan [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	152,900	57,600
Net Periodic Benefit Cost	2,869	1,762	3,607
Gross AOCI	(46,560)	(25,310)
Domestic plan [Member] | Pension Plans, Defined Benefit [Member] | Legacy Quaker U.S. Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Benefit Obligation Payment For Settlement	1,900
Defined Benefit Plan Benefit Obligation Period Increase (Decrease)	(4,000)
Gross AOCI	24,000
Domestic plan [Member] | Pension Plans, Defined Benefit [Member] | Legacy Quaker U.S. Pension Plan [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Termination	1,000
Domestic plan [Member] | Pension Plans, Defined Benefit [Member] | Legacy Quaker U.S. Pension Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Termination	$ 2,000
Domestic plan [Member] | Pension Plans, Defined Benefit [Member] | Defined Benefit Plan Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Commingled Fund Asset Allocation	100.00%
Domestic plan [Member] | Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Benefit Cost	$ 149	179	206
Gross AOCI	(734)	(338)
Domestic plan [Member] | Supplemental Employee Retirement Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Benefit Cost	1,800	1,600	1,400
Foreign [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	213,100	107,700
Net Periodic Benefit Cost	3,735	4,160	$ 3,986
Gross AOCI	$ (21,545)	$ (18,592)
Foreign [Member] | Pension Plans, Defined Benefit [Member] | Defined Benefit Plan Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Commingled Fund Asset Allocation	32.00%
Foreign [Member] | Pension Plans, Defined Benefit [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Commingled Fund Asset Allocation	55.00%
Foreign [Member] | Pension Plans, Defined Benefit [Member] | Other Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Commingled Fund Asset Allocation	13.00%