Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation and Other Compensation Matters - Restricted share and TB-PIU transactions under the entity's share-based compensation plans (Details)

v3.24.0.1
Share-Based Compensation and Other Compensation Matters - Restricted share and TB-PIU transactions under the entity's share-based compensation plans (Details) - $ / shares
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Restricted shares      
Shares      
Unvested at the beginning of the period (in shares or units) 325,083 334,573 360,817
Granted (in shares or units) 220,336 186,515 177,995
Forfeited (in shares or units) (39,474) (43,420) (39,664)
Vested (in shares or units) (152,490) (152,585) (164,575)
Unvested at the end of the period (in shares or units) 353,455 325,083 334,573
Unvested shares as of December 31, 2023 that are expected to vest (in shares or units) 317,075    
Weighted Average Grant Date Fair Value      
Unvested at the beginning of the period (in dollars per share or unit) $ 26.27 $ 26.22 $ 26.16
Granted (in dollars per share or unit) 25.38 26.50 26.17
Forfeited (in dollars per share or unit) 26.03 26.47 26.62
Vested (in dollars per share or unit) 26.09 26.39 25.95
Unvested at the end of the period (in dollars per share or unit) 25.82 $ 26.27 $ 26.22
Unvested shares as of December 31, 2023 that are expected to vest (in dollars per share or unit) $ 25.83    
TB- PIUs      
Shares      
Unvested at the beginning of the period (in shares or units) 187,330 163,073 114,334
Granted (in shares or units) 123,900 101,966 93,983
Forfeited (in shares or units) (27,182)    
Vested (in shares or units) (89,633) (77,709) (45,244)
Unvested at the end of the period (in shares or units) 194,415 187,330 163,073
Unvested shares as of December 31, 2023 that are expected to vest (in shares or units) 193,131    
Weighted Average Grant Date Fair Value      
Unvested at the beginning of the period (in dollars per share or unit) $ 26.19 $ 25.99 $ 25.57
Granted (in dollars per share or unit) 25.40 26.39 26.16
Forfeited (in dollars per share or unit) 26.46    
Vested (in dollars per share or unit) 25.95 26.04 25.28
Unvested at the end of the period (in dollars per share or unit) 25.76 $ 26.19 $ 25.99
Unvested shares as of December 31, 2023 that are expected to vest (in dollars per share or unit) $ 25.76