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Fair Value Measurements
12 Months Ended
Dec. 31, 2018
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
 
Liabilities Measured at Fair Value on a Recurring Basis
 
The following table presents the fair value of the Company’s financial instruments that are measured at fair value on a recurring basis as of December 31, 2018:
 
(in thousands)
Level 1
Level 2
Level 3
Total
Tax amortization benefit contingency(1)
$— $— $40,467 $40,467 
Contingent consideration(2)
— — 379 379 
Stock appreciation rights(4)
— — 146 146 
Phantom shares(5)
— — 404 404 
Total$— $— $41,396 $41,396 

The following table presents the fair value of the Company’s financial instruments that are measured at fair value on a recurring basis as of December 31, 2017:

(in thousands)Level 1Level 2Level 3Total
Tax amortization benefit contingency(1)
$— $— $43,382 $43,382 
Contingent consideration(2)
— — 691 691 
Interest rate contract (3)
— 456 — 456 
Stock appreciation rights(4)
— — 268 268 
Phantom shares(5)
— — 186 186 
Total$— $456 $44,527 $44,983 

———————————————————————————————
1.The fair value of the tax amortization benefit contingency is measured using an income approach based on the Company’s best estimate of the undiscounted cash payments to be made, with the current portion tax effected at 21.5% and the non-current portion tax effected at 21.5% due to the TCJA and discounted to present value utilizing an appropriate market discount rate. Per the April 4, 2017 Amendment Agreement, payments due to Dow under the Tax Receivable Agreement was reduced from 85% to 50% of the applicable tax savings realized by the Company. The valuation technique used did not change during the year ended December 31, 2017 and December 31, 2018.
2.The fair value of the contingent consideration related to the Tecnidex acquisition.
3.The derivative assets and liabilities relate to an interest rate derivative that is measured at fair value using observable market inputs such as interest rates, our own credit risks as well as an evaluation of the counterpart's' credit risks.
4.The fair value of the stock appreciation right was measured using a Black-Scholes pricing model during the year ended December 31, 2017 and December 31, 2018.
5.The fair value of phantom shares are based on the fair value of the Company's common stock. The valuation technique used did not change during the year ended December 31, 2017 and December 31, 2018.

There were no transfers between Level 1 and Level 2 and no transfers out of Level 3 of the fair value hierarchy during the year ended December 31, 2018 and December 31, 2017.
 
At December 31, 2018, the Company evaluated the amount recorded under the Term Loan and determined that the fair value was approximately $397.1 million. The carrying amounts of cash and cash equivalents, accounts receivable, and accounts payable approximate fair value.
 
Changes in Financial Instruments Measured at Level 3 Fair Value on a Recurring Basis
 
The following tables present the changes during the periods presented in our Level 3 financial instruments that are measured at fair value on a recurring basis. These instruments relate to contingent consideration payable to Dow in relation to the Business Combination.
 
(in thousands) Tax amortization
benefit
contingency
Contingent
consideration
related to
acquisition
Interest rate
contract
Stock
appreciation
rights
Phantom sharesTotal
Balance, December 31, 201743,382 691 456 268 186 44,983 
Accretion3,781 — — — — 3,781 
TRA payment to Dow(3,900)— — — — (3,900)
Tecnidex acquisition— (312)— — — (312)
Interest rate contract— — (456)— — (456)
Stock compensation expense— — — (122)218 96 
Mark-to-market adjustment(2,796)— — — — (2,796)
Balance, December 31, 2018$40,467 $379 $— $146 $404 $41,396