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Share-Based Compensation - Schedule of Activity for Restricted Stock (Details) - Restricted Stock - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of Shares      
Unvested, Beginning Balance 328,769 309,949 314,487
Granted 292,007 161,168 130,093
Vested (97,278) (99,894) (107,759)
Forfeited (22,962) (42,454) (26,872)
Unvested, Ending Balance 500,536 328,769 309,949
Weighted Average Grant Date Fair Value      
Unvested, Beginning Balance $ 82.02 $ 83.75 $ 78.17
Granted 90.23 80.97 82.82
Vested 78.55 84.69 66.46
Forfeited 86.48 84.36 83.34
Unvested, Ending Balance $ 87.28 $ 82.02 $ 83.75
Grant Date Fair Value of Restricted Stock that Vested During the Year      
Vested $ 8,673 $ 8,544 $ 8,910