Share-Based Compensation	3 Months Ended
Share-Based Compensation	Mar. 31, 2021
Disclosure Of Compensation Related Costs Share based Payments [Abstract]
Disclosure Of Compensation Related Costs Share Based Payments [Text Block]	Note 8 – Share-Based Compensation The Company recognized the following share-based compensation expense in its Condensed Consolidated Statements of Operations for the three months ended March 31, 2021 and 2020: Three Months Ended March 31, 2021 2020 Stock options $ 308 $ 432 Non-vested stock awards and restricted stock units 1,396 1,264 Non-elective and elective 401(k) matching contribution in stock 1,553 — Director stock ownership plan 203 40 Performance stock units 319 — Annual incentive plan — 2,946 Total share-based compensation expense $ 3,779 $ 4,682 Share-based compensation expense is recorded in SG&A, except for $ 0.3 million and $ 0.5 million during the three months ended March 31, 2021 and 2020, respectively, recorded within Combination, integration and other acquisition -related expenses. The change in total share-based compensation expense for the three months ended March 31, 2021 includes performance stock units and non- elective 401(k) matching contributions in stock but excludes annual incentive plan costs as a component of share-based compensation beginning in 2020, each described further below. Stock Options During the first quarter of 2021, the Company granted stock options under its long-term incentive plan (“LTIP ”) that are subject only to time vesting over a three-year period. For the purposes of determining the fair value of stock option awards, the Company used a Black-Scholes option pricing model and the assumptions set forth in the table below: Number of options granted 23,733 Dividend yield 0.85 % Expected volatility 37.33 % Risk-free interest rate 0.60 % Expected term (years) 4.0 The fair value of these options is amortized on a straight -line basis over the vesting period. As of March 31, 2021, unrecognized compensation expense related to all stock options granted was $ 2.8 million, to be recognized over a weighted average remaining period of 2.5 years. Restricted Stock Awards and Restricted Stock Units During the first quarter of 2021, the Company granted 12,610 nonvested restricted shares and 2,791 nonvested restricted stock units under its LTIP, subject to time-based vesting, generally over a three-year period. The fair value of these grants is based on the trading price of the Company’s common stock on the date of grant. The Company adjusts the grant date fair value of these awards for expected forfeitures based on historical experience. As of March 31, 2021, unrecognized compensation expense related to the nonvested restricted shares was $ 6.3 million, to be recognized over a weighted average remaining period of 2.1 years, and unrecognized compensation expense related to nonvested restricted stock units was $ 1.3 million, to be recognized over a weighted average remaining period of 2.3 years. Performance Stock Units During the first quarter of 2021, the Company granted performance-dependent stock awards (“PSUs”) as a component of its LTIP, which will be settled in a certain number of shares subject to market -based and time-based vesting conditions. The number of fully vested shares that may ultimately be issued as settlement for each award may range from 0 % up to 200 % of the target award, subject to the achievement of the Company’s total shareholder return (“TSR”) relative to the performance of the Company’s peer group, the S&P Midcap 400 Materials group. The service period required for the PSUs is three years and the TSR measurement period for the PSUs is from January 1 of the year of grant through December 31 of the year prior to issuance. Compensation expense for PSUs is measured based on their grant date fair value and is recognized on a straight-line basis over the three-year vesting period. The grant-date fair value of the PSUs granted during the first quarter of 2021 was estimated using a Monte Carlo simulation on the grant date and using the following assumptions: (i) a risk-free rate of 0.29 %; (ii) an expected term of 3.0 years; and (iii) a three-year daily historical volatility for each of the companies in the peer group, including Quaker Houghton. As of March 31, 2021, the Company estimates that it will issue approximately 28,000 fully vested shares as of the applicable settlement dates of all outstanding PSU awards, based on the conditions of the PSUs and performance to date for each award. As of March 31, 2021, there was approximately $ 4.8 million of total unrecognized compensation cost related to PSUs, which the Company expects to recognize over a weighted-average period of 2.5 years. Annual Incentive Plan The Company maintains an Annual Incentive Plan (“AIP”), which may be settled in cash or a certain number of shares subject to performance-based and time-based vesting conditions. As of March 31, 2020, it was the Company’s intention to settle the 2020 AIP in shares, and therefore, expense associated with the AIP in 2020 was recorded as a component of share-based compensation expense. In the fourth quarter of 2020, the Company determined that it would settle the 2020 AIP in cash. Therefore, the share-based compensation associated with the AIP during the year ended December 31, 2020 was reclassified from a component of share-based compensation expense to incentive compensation. This determination and conclusion had no impact on the classification of AIP expense within the Company’s Condensed Consolidated Statement of Operations for the periods as both are a component of SG&A. As of March 31, 2021, it is the Company’s intention to settle the 2021 AIP in cash. Defined Contribution Plan The Company has a 401(k) plan with an employer match covering a majority of its U.S. employees. The Company matches 50 % of the first 6 % of compensation that is contributed to the plan, with a maximum matching contribution of 3 % of compensation. Additionally, the plan provides for non-elective nondiscretionary contributions on behalf of participants who have completed one year of service equal to 3 % of the eligible participants’ compensation. Beginning in April 2020 and continuing until April 2021, the Company matched both non-elective and elective 401(k) contributions in fully vested shares of the Company’s common stock rather than cash. Total Company contributions were $ 1.5 million for the three months ended March 31, 2021. There were no similar matching contributions in stock for the three months ended March 31, 2020.