Share-Based Compensation - Summary of Non-vested Performance-Based Restricted Stock Units Outstanding (Details) - Performance-Based Restricted Stock Units - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Units, Non-vested at beginning of year	41,411	21,613
Number of Units, Granted	28,542	23,511
Number of Units, Vested (Performance achieved)	(12,697)
Number of Units, Forfeited		(3,713)
Number of Units, Non-vested at end of year	57,256	41,411
Weighted Average Grant Value, Non-vested at beginning of year	$ 66.39	$ 56.05
Weighted Average Grant Value, Granted	73.00	76.56
Weighted Average Grant Value, Vested (Performance achieved)	46.00
Weighted Average Grant Value, Forfeited		70.68
Weighted Average Grant Value, Non-vested at end of year	$ 72.82	$ 66.39