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Share-Based Compensation - Summary of Activity of the Outstanding PUP Awards (Details) - Performance Unit Incentive Plan ("PUP")
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Beginning Balance, shares | shares 59,714
Granted, shares | shares 32,367
Ending Balance, shares | shares 92,081
Beginning Balance, Weighted-Average Grant Date Fair Value | $ / shares $ 52.10
Granted, Weighted-Average Grant Date Fair Value | $ / shares 56.23
Ending Balance, Weighted-Average Grant Date Fair Value | $ / shares $ 55.49
Beginning Balance, shares | shares 155,190
Granted, shares | shares 52,531
Vested, shares | shares (67,866)
Forfeited, shares | shares (18,370)
Ending Balance, shares | shares 121,485
Beginning Balance, Weighted-Average Grant Date Fair Value | $ / shares $ 52.53
Granted, Weighted-Average Grant Date Fair Value | $ / shares 56.10
Vested, Weighted-Average Grant Date Fair Value | $ / shares 47.43
Forfeited, Weighted-Average Grant Date Fair Value | $ / shares 56.40
Ending Balance, Weighted-Average Grant Date Fair Value | $ / shares $ 55.08