XML 55 R39.htm IDEA: XBRL DOCUMENT v3.24.0.1
Stock Incentive Plans (Tables)
12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Fair Value Assumptions The grant date fair value of these awards was estimated using a Monte Carlo simulation model. Significant inputs used in the estimation of fair value of these awards granted during the years ended December 31, 2023 and 2022 are as follows:
Significant InputDecember 31, 2023December 31, 2022
Closing share price of our common stock
$45.50 to $53.77
$53.24 to $65.88
Risk-free rate of return
4.73% to 5.05%
1.05% to 4.23%
Expected volatility of our common stock
49.07% to 54.08%
54.74% to 71.40%
Holding period discount
12.43% to 12.83%
0.00% to 11.41%
Simulation term (in years)
0.75 to 0.82
0.81 to 3.5
Range of target
0% to 200%
0% to 200%
Schedule of Restricted Stock and RSU Activity
A summary of restricted stock and RSU activity under the 2016 Plan for the years ended December 31, 2023, 2022 and 2021 is as follows:

 Number of Restricted shares and RSUsWeighted Average Grant Date Fair ValueAggregate Fair Value (in millions)
Unvested awards as of December 31, 2020218,013 $27.48 
Granted160,878 $36.58 
Vested(124,447)$29.62 
Forfeited(7,818)$31.33 
Unvested awards as of December 31, 2021246,626 $32.72 
Granted205,131 $52.90 
Vested(125,033)$33.78 
Forfeited(3,596)$34.46 
Unvested awards as of December 31, 2022323,128 $45.10 
Granted96,577 $55.73 
Vested(146,959)$42.54 
Forfeited(807)$43.03 
Unvested awards as of December 31, 2023271,939 $50.26 $15.1 
Schedule of Compensation Expenses
Stock-based compensation expense for all stock awards, which is recognized in General and administrative expenses in the Consolidated Statements of Operations, for the years ended December 31, 2023, 2022 and 2021 is as follows:

 Year Ended
December 31, 2023December 31, 2022December 31, 2021
Stock-based compensation expense$7,492 $6,108 $3,481