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Share Based Compensation (Tables)
9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
A summary of changes in the common shares subject to nonvested PBRSUs for the nine months ended September 30, 2024 follows:

Common shares subject to PBRSUs
Nonvested at January 1, 2024186,936 
Granted59,165 
Vested(58,056)
Forfeited(2,025)
Adjustment for performance conditions of PBRSUs (1)
— 
Nonvested at September 30, 2024 (2)
186,020 
Share-based Compensation Arrangements by Share-based Payment Award, Performance-Based Units, Vested and Expected to Vest
A summary of awards vested during the three months and nine months ended September 30, 2024 and 2023 follows:

Three Months Ended
September 30,
Nine Months Ended
September 30,
2024202320242023
PBRSUs vested3,07558,05662,815 
Common shares withheld to satisfy employee income tax withholding obligations95822,89523,973 
Net common shares issued2,11735,16138,842
Share-based Payment Arrangement, Nonvested Award, Cost [Table Text Block]
The following table details expected additional share-based compensation expense related to PBRSUs outstanding at September 30, 2024:

(In thousands)
Three months ending December 31, 2024$1,559 
20255,018 
20263,310 
20271,383 
2028223 
Total$11,493