Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation and Other Compensation Matters (Restricted Shares and TB-PIUs Activity) (Details)

v3.22.0.1
Share-Based Compensation and Other Compensation Matters (Restricted Shares and TB-PIUs Activity) (Details) - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restricted shares      
Shares      
Unvested at the beginning of the period (in shares or units) 360,817 392,863 438,685
Stock awards granted (in shares or units) 177,995 166,918 195,520
Forfeited (in shares or units) (39,664) (25,773) (56,341)
Vested (in shares or units) (164,575) (173,191) (185,001)
Unvested at the end of the period (in shares or units) 334,573 360,817 392,863
Unvested shares as of December 31, 2020 that are expected to vest (in shares) 306,658    
Weighted Average Grant Date Fair Value      
Unvested at the beginning of the period (in dollars per share or unit) $ 26.16 $ 27.49 $ 28.38
Grant date fair value (in dollars per share or unit) 26.17 25.22 26.56
Forfeited (in dollars per share or unit) 26.62 27.12 29.44
Vested (in dollars per share or unit) 25.95 28.14 28.01
Unvested at the end of the period (in dollars per share or unit) 26.22 $ 26.16 $ 27.49
Unvested shares as of December 31, 2021 that are expected to vest (in dollars per share or unit) $ 26.22    
Restricted shares | Former Executive Vice President and Chief Operating Officer      
Shares      
Forfeited (in shares or units)   (9,064)  
Time-based PIUs      
Shares      
Unvested at the beginning of the period (in shares or units) 114,334 61,820 0
Stock awards granted (in shares or units) 93,983 98,318 61,820
Forfeited (in shares or units)   (20,622)  
Vested (in shares or units) (45,244) (25,182)  
Unvested at the end of the period (in shares or units) 163,073 114,334 61,820
Unvested shares as of December 31, 2020 that are expected to vest (in shares) 162,472    
Weighted Average Grant Date Fair Value      
Unvested at the beginning of the period (in dollars per share or unit) $ 25.57 $ 26.01  
Grant date fair value (in dollars per share or unit) 26.16 25.47 $ 26.01
Forfeited (in dollars per share or unit)   25.50  
Vested (in dollars per share or unit) 25.28 26.30  
Unvested at the end of the period (in dollars per share or unit) 25.99 $ 25.57 $ 26.01
Unvested shares as of December 31, 2021 that are expected to vest (in dollars per share or unit) $ 25.99