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Stock Incentive Plans (Tables)
 9 Months Ended
Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity
A summary of restricted stock and RSU activity under the 2016 Plan for the nine months ended September 30, 2023 is as follows:
 Number of Restricted Shares and RSUsWeighted Average Grant Date Fair ValueAggregate Fair Value (in millions)
Unvested awards as of December 31, 2022323,128 $45.10 
Granted95,392 $55.90 
Vested(134,279)$41.90 
Forfeited(391)$47.44 
Unvested awards as of September 30, 2023283,850 $50.24 $11.9 
Schedule of Noncash Compensation Expenses
Stock-based compensation expense for all stock awards, units and options included in General and administrative expenses is as follows:
Three Months EndedNine Months Ended
September 30, 2023September 30, 2022September 30, 2023September 30, 2022
Stock-based compensation expense$1,670 $1,449 $5,680 $4,542