Pension and Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Contributions In Current Fiscal Year					$ 6,000
Defined Benefit Plan, Contributions by Employer			$ 4,000
Defined benefit plan description of nature of event resulting in contractual termination benefits to be recognized in future period			The Company previously disclosed in its Annual Report filed on Form 10-K, as amended by Form 10-K/A, for the year ended December 31, 2018 that the Company began the process of terminating Quaker’s primary non-contributory U.S. pension plan (the “U.S. Pension Plan”) during the fourth quarter of 2018. As part of this process, and considering the fully funded status of the U.S. Pension Plan, the asset allocation of the U.S. Pension Plan was adjusted modeling a glide path that is more heavily allocated to fixed income securities with lengthened durations to match the projected liabilities. As a result, the expected return on plan assets declined during the three and nine months ended September 30, 2019 compared to the three and nine months ended September 30, 2018. In order to terminate the U.S. Pension Plan in accordance with Internal Revenue Service (“I.R.S.”) and Pension Benefit Guaranty Corporation requirements, the Company will be required to fully fund the U.S. Pension Plan on a termination basis and will commit to contribute additional assets if necessary, to do so. The amount necessary to do so is not yet known but is currently estimated to be between $0 and $10 million. In addition, the Company expects to record a non-cash pension settlement charge at plan termination. This settlement charge will include the immediate recognition into expense of the related unrecognized losses within AOCI on the balance sheet as of the plan termination date. The Company does not have a current estimate for this future settlement charge, however, the gross AOCI related to the U.S. Pension Plan was approximately $18.5 million as of September 30, 2019. During the third quarter of 2019, the Company received a favorable termination determination letter from the I.R.S. and has amended the Plan to comply with final regulations of the Internal Revenue Code. The Company currently estimates that the U.S. Pension Plan termination will be completed during 2020.
Multi employer Plans Business Combination Or Divestiture Description			In connection with the Combination, the Company now contributes to a multiemployer defined benefit pension plan under terms of a collective bargaining union contract (the Cleveland Bakers and Teamsters Pension Fund). The expiration date of the collective bargaining contract is May 1, 2022. As of January 1, 2018, the last valuation date available for the multiemployer plan, total plan liabilities were approximately $592 million. As of December 31, 2018, the multiemployer pension plan had total plan assets of approximately $315 million. The Company’s contribution rate to the multiemployer pension plan is specified in the collectivebargaining union contract and contributions are made to the plan based on its union employee payroll. The Company contributed less than $0.1 million during the three and nine months ended September 30, 2019. While the Company may also have additional liabilities imposed by law as a result of its participation in the multiemployer defined benefit pension plan, there is no liability as of September 30, 2019. The Employee Retirement Income Security Act of 1974, as amended by the Multi-Employer Pension Plan Amendments Act of 1980, imposes certain contingent liabilities upon an employer who is a contributor to a multiemployer pension plan if the employer withdraws from the plan or the plan is terminated or experiences a mass withdrawal.
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 993	$ 938	$ 2,956	$ 2,886
Defined Benefit Plan, Interest Cost	1,852	1,015	4,068	3,096
Defined Benefit Plan, Expected Return on Plan Assets	(2,140)	(1,229)	(4,102)	(3,793)
Defined Benefit Plan, Amortization of Losses	799	782	2,348	2,375
Defined Benefit Plan, Amortization of Prior Service Cost	(34)	(28)	(117)	(88)
Defined Benefit Plan, Net Periodic Benefit Cost	1,470	1,478	5,153	4,476
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	2	0	5	5
Defined Benefit Plan, Interest Cost	36	31	107	97
Defined Benefit Plan, Expected Return on Plan Assets	0	0	0	0
Defined Benefit Plan, Amortization of Losses	0	2	0	31
Defined Benefit Plan, Amortization of Prior Service Cost	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	38	$ 33	112	$ 133
Houghton Combination [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	1,000		1,000
Defined Benefit Plan, Contributions by Employer			1,000
Pension Liability	$ 24,100		$ 24,100