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Fair Value Measurement (Tables)
12 Months Ended
Dec. 31, 2020
Fair Value Disclosures [Abstract]  
Summary of Changes in Fair Value by Balance Sheet Grouping
The following table presents the input level used to determine the fair values of our financial instruments measured at fair value on a recurring basis:
Fair Value as of December 31,
Level20202019
Assets
Interest rate swap instruments2$$15 
Commodity swap instruments2363 198 
Total assets$365 $213 
Liabilities
Interest rate swap instruments2$10,073 $6,236 
Make-whole provisions2412 918 
Contingent consideration3678 678 
Total liabilities$11,163 $7,832 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
The following table sets forth a summary of changes in the fair value of contingent consideration liability classified as level 3:
Year Ended December 31,
20202019
Contingent consideration liability balance at the beginning of year$678 $599 
Loss on change in fair value included in earnings— 79 
Contingent consideration liability balance at the end of year$678 $678 
Fair Value and Carrying Value of Long-Term Debt
The following table sets forth the fair value and the carrying value of our long-term debt, excluding financing leases:
December 31, 2020December 31, 2019
 Fair ValueCarrying ValueFair ValueCarrying Value
Long-term debt value (level 2)$363,460 $357,536 $309,377 $307,508