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Employee Benefits (Tables)
9 Months Ended
Sep. 30, 2023
Postemployment Benefits [Abstract]  
Summary of Workers' Compensation Known Claims and IBNR Reserves
Workers’ compensation known claims and IBNR reserves included on the Condensed Consolidated Balance Sheets were as follows (in thousands):
 September 30, 2023December 31, 2022
Included in other current liabilities$8,760 $9,946 
Included in other long-term liabilities17,404 13,730 
$26,164 $23,676 
Schedule of Insurance Receivable for Claims This receivable offsets an equal liability included within the reserve amounts noted above and was as follows (in thousands):
 September 30, 2023December 31, 2022
Included in other non-current assets$2,906 $2,318 
Summary of Equity-based Awards for Employees
Amounts and changes for each category of equity-based award were as follows:
 Common Stock AwardsPerformance-Based Stock AwardsPerformance-Based Restricted Stock Units
 AwardsWeighted Average Grant Date Fair Value Per ShareAwardsWeighted Average Grant Date Fair Value Per ShareUnitsWeighted Average Grant Date Fair Value Per Share
Nonvested awards/units at December 31, 2022
157,117 $77.31 126,053 $103.37 15,711 $80.55 
Granted75,928 111.03 69,281 109.09 14,730 111.84 
Vested(108,110)71.28 (50,994)95.78 (15,518)80.76 
Forfeited/Cancelled(1,722)98.85 — — (495)96.61 
Nonvested awards/units at September 30, 2023123,213 $103.08 144,340 $108.80 14,428 $111.71 
Summary of Stock Compensation Expenses
The following table summarizes the share-based compensation expense recognized by award type (in thousands):
 Three months ended September 30,Nine months ended September 30,
 2023202220232022
Common Stock Awards$1,355 $1,420 $4,259 $4,718 
Non-Employee Common Stock Awards177 147 485 396 
Performance-Based Stock Awards1,496 1,237 4,638 3,863 
Liability Performance-Based Stock Awards94 84 184 418 
Performance-Based Restricted Stock Units394 324 1,071 895 
$3,516 $3,212 $10,637 $10,290 
We recorded the following stock compensation expense by income statement category (in thousands):
 Three months ended September 30,Nine months ended September 30,
 2023202220232022
Cost of sales$253 $165 $658 $484 
Selling91 126 316 329 
Administrative3,172 2,921 9,663 9,477 
$3,516 $3,212 $10,637 $10,290 
Unrecognized Share-Based Compensation Expense Related to Unvested Awards
Unrecognized share-based compensation expense related to unvested awards was as follows (in thousands):
 As of September 30, 2023
 Unrecognized
Compensation Expense
on Unvested Awards
Weighted Average
Remaining
Vesting Period
Common Stock Awards$9,593 2.0 years
Performance-Based Stock Awards8,037 1.7 years
Performance-Based Restricted Stock Units845 0.6 years
Total unrecognized compensation expense related to unvested awards$18,475